(en)Aspects of the subject disclosure may include, for example, wirelessly receiving first control signals that are received directly from a remote control device according to user input at the remote control device, adjusting a flight of the unmanned aircraft according to the first control signals, wirelessly receiving second control signals that are received from a network device where the second control signals are not sourced by the remote control device, and adjusting the flight of the unmanned aircraft according to the second control signals. Other embodiments are disclosed.

1.ApplicationNumber: US-201615371274-A
1.PublishNumber: US-2018157250-A1
2.Date Publish: 20180607
3.Inventor: BARNICKEL, DONALD J.
BEATTIE, JR., JAMES GORDON
LIU, KEN
BARZEGAR, FARHAD
GERSZBERG, IRWIN
BOGDAN, PAMELA A. M.
PIMM, BRANDON
WILLIS, III, Thomas M.
BRITZ, DAVID M.
HENRY, PAUL SHALA
BENNETT, ROBERT
ZARSKY, DOROTHY

4.Inventor Harmonized: BARNICKEL DONALD J(US)
BEATTIE JR JAMES GORDON(US)
LIU KEN(US)
BARZEGAR FARHAD(US)
GERSZBERG IRWIN(US)
BOGDAN PAMELA A M(US)
PIMM BRANDON(US)
WILLIS III THOMAS M(US)
BRITZ DAVID M(US)
HENRY PAUL SHALA(US)
BENNETT ROBERT(US)
ZARSKY DOROTHY(US)

5.Country: US
6.Claims:
(en)Aspects of the subject disclosure may include, for example, wirelessly receiving first control signals that are received directly from a remote control device according to user input at the remote control device, adjusting a flight of the unmanned aircraft according to the first control signals, wirelessly receiving second control signals that are received from a network device where the second control signals are not sourced by the remote control device, and adjusting the flight of the unmanned aircraft according to the second control signals. Other embodiments are disclosed.

7.Description:
(en)FIELD OF THE DISCLOSURE
The subject disclosure relates to a method and apparatus for controlling an unmanned aircraft.
BACKGROUND
As smart phones and other portable devices increasingly become ubiquitous, and data usage increases, macrocell base station devices and existing wireless infrastructure in turn require higher bandwidth capability in order to address the increased demand. To provide additional mobile bandwidth, small cell deployment is being pursued, with microcells and picocells providing coverage for much smaller areas than traditional macrocells.
In addition, most homes and businesses have grown to rely on broadband data access for services such as voice, video and Internet browsing, etc. Broadband access networks include satellite, 4G or 5G wireless, power line communication, fiber, cable, and telephone networks.



BRIEF DESCRIPTION OF THE DRAWINGS
Reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
FIG. 1 is a block diagram illustrating an example, non-limiting embodiment of a guided-wave communications system in accordance with various aspects described herein.
FIG. 2 is a block diagram illustrating an example, non-limiting embodiment of a transmission device in accordance with various aspects described herein.
FIG. 3 is a graphical diagram illustrating an example, non-limiting embodiment of an electromagnetic field distribution in accordance with various aspects described herein.
FIG. 4 is a graphical diagram illustrating an example, non-limiting embodiment of an electromagnetic field distribution in accordance with various aspects described herein.
FIG. 5A is a graphical diagram illustrating an example, non-limiting embodiment of a frequency response in accordance with various aspects described herein.
FIG. 5B is a graphical diagram illustrating example, non-limiting embodiments of a longitudinal cross-section of an insulated wire depicting fields of guided electromagnetic waves at various operating frequencies in accordance with various aspects described herein.
FIG. 6 is a graphical diagram illustrating an example, non-limiting embodiment of an electromagnetic field distribution in accordance with various aspects described herein.
FIG. 7 is a block diagram illustrating an example, non-limiting embodiment of an arc coupler in accordance with various aspects described herein.
FIG. 8 is a block diagram illustrating an example, non-limiting embodiment of an arc coupler in accordance with various aspects described herein.
FIG. 9A is a block diagram illustrating an example, non-limiting embodiment of a stub coupler in accordance with various aspects described herein.
FIG. 9B is a diagram illustrating an example, non-limiting embodiment of an electromagnetic distribution in accordance with various aspects described herein.
FIGS. 10A and 10B are block diagrams illustrating example, non-limiting embodiments of couplers and transceivers in accordance with various aspects described herein.
FIG. 11 is a block diagram illustrating an example, non-limiting embodiment of a dual stub coupler in accordance with various aspects described herein.
FIG. 12 is a block diagram illustrating an example, non-limiting embodiment of a repeater system in accordance with various aspects described herein.
FIG. 13 illustrates a block diagram illustrating an example, non-limiting embodiment of a bidirectional repeater in accordance with various aspects described herein.
FIG. 14 is a block diagram illustrating an example, non-limiting embodiment of a waveguide system in accordance with various aspects described herein.
FIG. 15 is a block diagram illustrating an example, non-limiting embodiment of a guided-wave communications system in accordance with various aspects described herein.
FIGS. 16A & 16B are block diagrams illustrating an example, non-limiting embodiment of a system for managing a power grid communication system in accordance with various aspects described herein.
FIG. 17A illustrates a flow diagram of an example, non-limiting embodiment of a method for detecting and mitigating disturbances occurring in a communication network of the system of FIGS. 16A and 16B .
FIG. 17B illustrates a flow diagram of an example, non-limiting embodiment of a method for detecting and mitigating disturbances occurring in a communication network of the system of FIGS. 16A and 16B .
FIGS. 18A, 18B, 18C, 18D, 18E, 18F, 18G, 18H, 18I and 18J are block diagrams illustrating example, non-limiting embodiments of a waveguide device for transmitting or receiving electromagnetic waves in accordance with various aspects described herein.
FIGS. 19A & 19B are block diagrams illustrating an example, non-limiting embodiment of a system that enables deployment of communication system equipment utilizing an unmanned aircraft system.
FIGS. 20A & 20B are block diagrams illustrating example, non-limiting embodiments of a waveguide device deployable via an unmanned aircraft system where the waveguide device can transmit and/or receive electromagnetic waves in accordance with various aspects described herein.
FIGS. 21A, 21B & 21C are block diagrams illustrating an example, non-limiting embodiment of a system that enables deployment of a waveguide device utilizing an unmanned aircraft system.
FIG. 22 illustrates a flow diagram of an example, non-limiting embodiment of a method of deploying communication system equipment in accordance with various aspects described herein.
FIGS. 23A, 23B, 23C, 23D, 23E, 23F, 23G, and 23H are block diagrams illustrating example, non-limiting embodiments of communication devices that obtains power via an inductive coupling in accordance with various aspects described herein.
FIGS. 24, 25, 26, 27 and 28 are block diagrams illustrating example, non-limiting embodiments of other communication devices that obtains power via an inductive coupling in accordance with various aspects described herein.
FIGS. 29A and 29B are block diagrams illustrating example, non-limiting embodiments of a dielectric antenna and corresponding gain and field intensity plots in accordance with various aspects described herein.
FIGS. 30A, 30B, and 30C are block diagrams illustrating example, non-limiting embodiment of a transmission medium for propagating guided electromagnetic waves.
FIGS. 31A and 31B are block diagrams illustrating example, non-limiting embodiments of a waveguide device for transmitting or receiving electromagnetic waves in accordance with various aspects described herein.
FIGS. 32A and 32B are block diagrams illustrating example, non-limiting embodiments of a waveguide device for transmitting or receiving electromagnetic waves in accordance with various aspects described herein.
FIG. 33 illustrates a flow diagram of an example, non-limiting embodiment of a method of obtaining power at a communication device via an inductive power coupling in accordance with various aspects described herein.
FIG. 34 is a block diagram illustrating an example, non-limiting embodiment of a system that collects data associated with wireless communications in accordance with various aspects described herein.
FIGS. 35, 36, 37, and 38 are block diagrams illustrating example, non-limiting embodiments of placement information associated with a communication device and wireless communications in accordance with various aspects described herein.
FIG. 39 is a block diagram illustrating an example, non-limiting embodiment of another system that collects data associated with wireless communications in accordance with various aspects described herein.
FIG. 40 is a block diagram illustrating an example, non-limiting embodiment of placement information associated with a communication device and wireless communications in accordance with various aspects described herein.
FIGS. 41 and 42 are block diagrams illustrating example, non-limiting embodiments of other systems that collect data associated with wireless communications in accordance with various aspects described herein.
FIG. 43 illustrates a flow diagram of an example, non-limiting embodiment of a method of collecting data associated with wireless communications in accordance with various aspects described herein.
FIG. 44 is a block diagram illustrating an example, non-limiting embodiment of a system for controlling an unmanned aircraft in accordance with various aspects described herein.
FIG. 45 illustrates a flow diagram of an example, non-limiting embodiment of a method of controlling an unmanned aircraft in accordance with various aspects described herein.
FIG. 46 is a block diagram illustrating an example, non-limiting embodiment of a system that collects data associated with a particular target area in accordance with various aspects described herein.
FIG. 47 is a block diagram illustrating an example, non-limiting embodiment of a system for managing data associated with unmanned aircraft in accordance with various aspects described herein.
FIG. 48 is a block diagram illustrating an example, non-limiting embodiment of a system for maintaining an unmanned aircraft in accordance with various aspects described herein.
FIG. 49 is a block diagram of an example, non-limiting embodiment of a computing environment in accordance with various aspects described herein.
FIG. 50 is a block diagram of an example, non-limiting embodiment of a mobile network platform in accordance with various aspects described herein.
FIG. 51 is a block diagram of an example, non-limiting embodiment of a communication device in accordance with various aspects described herein.



DETAILED DESCRIPTION
One or more embodiments are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the various embodiments. It is evident, however, that the various embodiments can be practiced without these details (and without applying to any particular networked environment or standard).
In an embodiment, a guided wave communication system is presented for sending and receiving communication signals such as data or other signaling via guided electromagnetic waves. The guided electromagnetic waves include, for example, surface waves or other electromagnetic waves that are bound to or guided by a transmission medium. It will be appreciated that a variety of transmission media can be utilized with guided wave communications without departing from example embodiments. Examples of such transmission media can include one or more of the following, either alone or in one or more combinations: wires, whether insulated or not, and whether single-stranded or multi-stranded; conductors of other shapes or configurations including wire bundles, cables, rods, rails, pipes; non-conductors such as dielectric pipes, rods, rails, or other dielectric members; combinations of conductors and dielectric materials; or other guided wave transmission media.
The inducement of guided electromagnetic waves on a transmission medium can be independent of any electrical potential, charge or current that is injected or otherwise transmitted through the transmission medium as part of an electrical circuit. For example, in the case where the transmission medium is a wire, it is to be appreciated that while a small current in the wire may be formed in response to the propagation of the guided waves along the wire, this can be due to the propagation of the electromagnetic wave along the wire surface, and is not formed in response to electrical potential, charge or current that is injected into the wire as part of an electrical circuit. The electromagnetic waves traveling on the wire therefore do not require a circuit to propagate along the wire surface. The wire therefore is a single wire transmission line that is not part of a circuit. Also, in some embodiments, a wire is not necessary, and the electromagnetic waves can propagate along a single line transmission medium that is not a wire.
More generally, “guided electromagnetic waves” or “guided waves” as described by the subject disclosure are affected by the presence of a physical object that is at least a part of the transmission medium (e.g., a bare wire or other conductor, a dielectric, an insulated wire, a conduit or other hollow element, a bundle of insulated wires that is coated, covered or surrounded by a dielectric or insulator or other wire bundle, or another form of solid or otherwise non-liquid or non-gaseous transmission medium) so as to be at least partially bound to or guided by the physical object and so as to propagate along a transmission path of the physical object. Such a physical object can operate as at least a part of a transmission medium that guides, by way of an interface of the transmission medium (e.g., an outer surface, inner surface, an interior portion between the outer and the inner surfaces or other boundary between elements of the transmission medium), the propagation of guided electromagnetic waves, which in turn can carry energy, data and/or other signals along the transmission path from a sending device to a receiving device.
Unlike free space propagation of wireless signals such as unguided (or unbounded) electromagnetic waves that decrease in intensity inversely by the square of the distance traveled by the unguided electromagnetic waves, guided electromagnetic waves can propagate along a transmission medium with less loss in magnitude per unit distance than experienced by unguided electromagnetic waves.
An electrical circuit allows electrical signals to propagate from a sending device to a receiving device via a forward electrical path and a return electrical path, respectively. These electrical forward and return paths can be implemented via two conductors, such as two wires or a single wire and a common ground that serves as the second conductor. In particular, electrical current from the sending device (direct and/or alternating) flows through the electrical forward path and returns to the transmission source via the electrical return path as an opposing current. More particularly, electron flow in one conductor that flows away from the sending device, returns to the receiving device in the opposite direction via a second conductor or ground. Unlike electrical signals, guided electromagnetic waves can propagate along a transmission medium (e.g., a bare conductor, an insulated conductor, a conduit, a non-conducting material such as a dielectric strip, or any other type of object suitable for the propagation of surface waves) from a sending device to a receiving device or vice-versa without requiring the transmission medium to be part of an electrical circuit (i.e., without requiring an electrical return path) between the sending device and the receiving device. Although electromagnetic waves can propagate in an open circuit, i.e., a circuit without an electrical return path or with a break or gap that prevents the flow of electrical current through the circuit, it is noted that electromagnetic waves can also propagate along a surface of a transmission medium that is in fact part of an electrical circuit. That is electromagnetic waves can travel along a first surface of a transmission medium having a forward electrical path and/or along a second surface of a transmission medium having an electrical return path. As a consequence, guided electromagnetic waves can propagate along a surface of a transmission medium from a sending device to a receiving device or vice-versa with or without an electrical circuit.
This permits, for example, transmission of guided electromagnetic waves along a transmission medium having no conductive components (e.g., a dielectric strip). This also permits, for example, transmission of guided electromagnetic waves that propagate along a transmission medium having no more than a single conductor (e.g., an electromagnetic wave that propagates along the surface of a single bare conductor or along the surface of a single insulated conductor or an electromagnetic wave that propagates all or partly within the insulation of an insulated conductor). Even if a transmission medium includes one or more conductive components and the guided electromagnetic waves propagating along the transmission medium generate currents that, at times, flow in the one or more conductive components in a direction of the guided electromagnetic waves, such guided electromagnetic waves can propagate along the transmission medium from a sending device to a receiving device without a flow of an opposing current on an electrical return path back to the sending device from the receiving device. As a consequence, the propagation of such guided electromagnetic waves can be referred to as propagating via a single transmission line or propagating via a surface wave transmission line.
In a non-limiting illustration, consider a coaxial cable having a center conductor and a ground shield that are separated by an insulator. Typically, in an electrical system a first terminal of a sending (and receiving) device can be connected to the center conductor, and a second terminal of the sending (and receiving) device can be connected to the ground shield. If the sending device injects an electrical signal in the center conductor via the first terminal, the electrical signal will propagate along the center conductor causing, at times, forward currents and a corresponding flow of electrons in the center conductor, and return currents and an opposing flow of electrons in the ground shield. The same conditions apply for a two terminal receiving device.
In contrast, consider a guided wave communication system such as described in the subject disclosure, which can utilize different embodiments of a transmission medium (including among others a coaxial cable) for transmitting and receiving guided electromagnetic waves without an electrical circuit (i.e., without an electrical forward path or electrical return path depending on your perspective). In one embodiment, for example, the guided wave communication system of the subject disclosure can be configured to induce guided electromagnetic waves that propagate along an outer surface of a coaxial cable (e.g., the outer jacket or insulation layer of the coaxial cable). Although the guided electromagnetic waves will cause forward currents on the ground shield, the guided electromagnetic waves do not require return currents in the center conductor to enable the guided electromagnetic waves to propagate along the outer surface of the coaxial cable. Said another way, while the guided electromagnetic waves will cause forward currents on the ground shield, the guided electromagnetic waves will not generate opposing return currents in the center conductor (or other electrical return path). The same can be said of other transmission media used by a guided wave communication system for the transmission and reception of guided electromagnetic waves.
For example, guided electromagnetic waves induced by the guided wave communication system on an outer surface of a bare conductor, or an insulated conductor can propagate along the outer surface of the bare conductor or the other surface of the insulated conductor without generating opposing return currents in an electrical return path. As another point of differentiation, where the majority of the signal energy in an electrical circuit is induced by the flow of electrons in the conductors themselves, guided electromagnetic waves propagating in a guided wave communication system on an outer surface of a bare conductor, cause only minimal forward currents in the bare conductor, with the majority of the signal energy of the electromagnetic wave concentrated above the outer surface of the bare conductor and not inside the bare conductor. Furthermore, guided electromagnetic waves that are bound to the outer surface of an insulated conductor cause only minimal forward currents in the center conductor or conductors of the insulated conductor, with the majority of the signal energy of the electromagnetic wave concentrated in regions inside the insulation and/or above the outside surface of the insulated conductor—in other words, the majority of the signal energy of the electromagnetic wave is concentrated outside the center conductor(s) of the insulated conductor.
Consequently, electrical systems that require two or more conductors for carrying forward and reverse currents on separate conductors to enable the propagation of electrical signals injected by a sending device are distinct from guided wave systems that induce guided electromagnetic waves on an interface of a transmission medium without the need of an electrical circuit to enable the propagation of the guided electromagnetic waves along the interface of the transmission medium.
It is further noted that guided electromagnetic waves as described in the subject disclosure can have an electromagnetic field structure that lies primarily or substantially outside of a transmission medium so as to be bound to or guided by the transmission medium and so as to propagate non-trivial distances on or along an outer surface of the transmission medium. In other embodiments, guided electromagnetic waves can have an electromagnetic field structure that lies primarily or substantially inside a transmission medium so as to be bound to or guided by the transmission medium and so as to propagate non-trivial distances within the transmission medium. In other embodiments, guided electromagnetic waves can have an electromagnetic field structure that lies partially inside and partially outside a transmission medium so as to be bound to or guided by the transmission medium and so as to propagate non-trivial distances along the transmission medium. The desired electronic field structure in an embodiment may vary based upon a variety of factors, including the desired transmission distance, the characteristics of the transmission medium itself, and environmental conditions/characteristics outside of the transmission medium (e.g., presence of rain, fog, atmospheric conditions, etc.).
Various embodiments described herein relate to coupling devices, that can be referred to as “waveguide coupling devices”, “waveguide couplers” or more simply as “couplers”, “coupling devices” or “launchers” for launching and/or extracting guided electromagnetic waves to and from a transmission medium at millimeter-wave frequencies (e.g., 30 to 300 GHz), wherein the wavelength can be small compared to one or more dimensions of the coupling device and/or the transmission medium such as the circumference of a wire or other cross sectional dimension, or lower microwave frequencies such as 300 MHz to 30 GHz. Transmissions can be generated to propagate as waves guided by a coupling device, such as: a strip, arc or other length of dielectric material; a horn, monopole, rod, slot or other antenna; an array of antennas; a magnetic resonant cavity, or other resonant coupler; a coil, a strip line, a waveguide or other coupling device. In operation, the coupling device receives an electromagnetic wave from a transmitter or transmission medium. The electromagnetic field structure of the electromagnetic wave can be carried inside the coupling device, outside the coupling device or some combination thereof. When the coupling device is in close proximity to a transmission medium, at least a portion of an electromagnetic wave couples to or is bound to the transmission medium, and continues to propagate as guided electromagnetic waves. In a reciprocal fashion, a coupling device can extract guided waves from a transmission medium and transfer these electromagnetic waves to a receiver.
According to an example embodiment, a surface wave is a type of guided wave that is guided by a surface of a transmission medium, such as an exterior or outer surface of the wire, or another surface of the wire that is adjacent to or exposed to another type of medium having different properties (e.g., dielectric properties). Indeed, in an example embodiment, a surface of the wire that guides a surface wave can represent a transitional surface between two different types of media. For example, in the case of a bare or uninsulated wire, the surface of the wire can be the outer or exterior conductive surface of the bare or uninsulated wire that is exposed to air or free space. As another example, in the case of insulated wire, the surface of the wire can be the conductive portion of the wire that meets the insulator portion of the wire, or can otherwise be the insulator surface of the wire that is exposed to air or free space, or can otherwise be any material region between the insulator surface of the wire and the conductive portion of the wire that meets the insulator portion of the wire, depending upon the relative differences in the properties (e.g., dielectric properties) of the insulator, air, and/or the conductor and further dependent on the frequency and propagation mode or modes of the guided wave.
According to an example embodiment, the term “about” a wire or other transmission medium used in conjunction with a guided wave can include fundamental guided wave propagation modes such as a guided waves having a circular or substantially circular field distribution, a symmetrical electromagnetic field distribution (e.g., electric field, magnetic field, electromagnetic field, etc.) or other fundamental mode pattern at least partially around a wire or other transmission medium. In addition, when a guided wave propagates “about” a wire or other transmission medium, it can do so according to a guided wave propagation mode that includes not only the fundamental wave propagation modes (e.g., zero order modes), but additionally or alternatively non-fundamental wave propagation modes such as higher-order guided wave modes (e.g., 1 st order modes, 2 nd order modes, etc.), asymmetrical modes and/or other guided (e.g., surface) waves that have non-circular field distributions around a wire or other transmission medium. As used herein, the term “guided wave mode” refers to a guided wave propagation mode of a transmission medium, coupling device or other system component of a guided wave communication system.
For example, such non-circular field distributions can be unilateral or multi-lateral with one or more axial lobes characterized by relatively higher field strength and/or one or more nulls or null regions characterized by relatively low-field strength, zero-field strength or substantially zero-field strength. Further, the field distribution can otherwise vary as a function of azimuthal orientation around the wire such that one or more angular regions around the wire have an electric or magnetic field strength (or combination thereof) that is higher than one or more other angular regions of azimuthal orientation, according to an example embodiment. It will be appreciated that the relative orientations or positions of the guided wave higher order modes or asymmetrical modes can vary as the guided wave travels along the wire.
As used herein, the term “millimeter-wave” can refer to electromagnetic waves/signals that fall within the “millimeter-wave frequency band” of 30 GHz to 300 GHz. The term “microwave” can refer to electromagnetic waves/signals that fall within a “microwave frequency band” of 300 MHz to 300 GHz. The term “radio frequency” or “RF” can refer to electromagnetic waves/signals that fall within the “radio frequency band” of 10 kHz to 1 THz. It is appreciated that wireless signals, electrical signals, and guided electromagnetic waves as described in the subject disclosure can be configured to operate at any desirable frequency range, such as, for example, at frequencies within, above or below millimeter-wave and/or microwave frequency bands. In particular, when a coupling device or transmission medium includes a conductive element, the frequency of the guided electromagnetic waves that are carried by the coupling device and/or propagate along the transmission medium can be below the mean collision frequency of the electrons in the conductive element. Further, the frequency of the guided electromagnetic waves that are carried by the coupling device and/or propagate along the transmission medium can be a non-optical frequency, e.g. a radio frequency below the range of optical frequencies that begins at 1 THz.
As used herein, the term “antenna” can refer to a device that is part of a transmitting or receiving system to transmit/radiate or receive wireless signals.
In accordance with one or more embodiments, a method includes wirelessly receiving, by a processing system of an unmanned aircraft, first control signals that are received directly from a remote control device according to user input at the remote control device; and adjusting, by the processing system, a flight of the unmanned aircraft according to the first control signals. The method includes wirelessly receiving, by the processing system, second control signals that are received from a network device of a cellular network, where the second control signals are not received by the processing system directly from the remote control device. The method includes adjusting, by the processing system, the flight of the unmanned aircraft according to the second control signals responsive to a determination that the first control signals are no longer being received by the processing system.
In accordance with one or more embodiments, a machine-readable storage medium, including executable instructions that, when executed by a processing system of an unmanned aircraft, facilitate performance of operations. The operations include wirelessly receiving first control signals that are received directly from a remote control device according to user input at the remote control device. The operations include adjusting a flight of the unmanned aircraft according to the first control signals; and wirelessly receiving second control signals that are received from a network device, where the second control signals are not sourced by the remote control device. The operations include adjusting the flight of the unmanned aircraft according to the second control signals causing the unmanned aircraft to fly within a transmitting range of the remote control device.
In accordance with one or more embodiments, a method includes determining, by a processing system comprising a processor, whether an unmanned aircraft is registered with a network that includes the processing system. The method includes determining, by the processing system, whether the unmanned aircraft is receiving first control signals being sourced by a remote control device. Responsive to a registration of the unmanned aircraft with the network and responsive to a determination that the unmanned aircraft is not receiving the first control signals, the processing system can wirelessly transmit to the unmanned aircraft, second control signals via a transmitter of the network, where the second control signals cause a flight of the unmanned aircraft to be adjusted.
Referring now to FIG. 1 , a block diagram 100 illustrating an example, non-limiting embodiment of a guided wave communications system is shown. In operation, a transmission device 101 receives one or more communication signals 110 from a communication network or other communications device that includes data and generates guided waves 120 to convey the data via the transmission medium 125 to the transmission device 102 . The transmission device 102 receives the guided waves 120 and converts them to communication signals 112 that include the data for transmission to a communications network or other communications device. The guided waves 120 can be modulated to convey data via a modulation technique such as phase shift keying, frequency shift keying, quadrature amplitude modulation, amplitude modulation, multi-carrier modulation such as orthogonal frequency division multiplexing and via multiple access techniques such as frequency division multiplexing, time division multiplexing, code division multiplexing, multiplexing via differing wave propagation modes and via other modulation and access strategies.
The communication network or networks can include a wireless communication network such as a mobile data network, a cellular voice and data network, a wireless local area network (e.g., WiFi or an 802.xx network), a satellite communications network, a personal area network or other wireless network. The communication network or networks can also include a wired communication network such as a telephone network, an Ethernet network, a local area network, a wide area network such as the Internet, a broadband access network, a cable network, a fiber optic network, or other wired network. The communication devices can include a network edge device, bridge device or home gateway, a set-top box, broadband modem, telephone adapter, access point, base station, or other fixed communication device, a mobile communication device such as an automotive gateway or automobile, laptop computer, tablet, smartphone, cellular telephone, or other communication device.
In an example embodiment, the guided wave communication system 100 can operate in a bi-directional fashion where transmission device 102 receives one or more communication signals 112 from a communication network or device that includes other data and generates guided waves 122 to convey the other data via the transmission medium 125 to the transmission device 101 . In this mode of operation, the transmission device 101 receives the guided waves 122 and converts them to communication signals 110 that include the other data for transmission to a communications network or device. The guided waves 122 can be modulated to convey data via a modulation technique such as phase shift keying, frequency shift keying, quadrature amplitude modulation, amplitude modulation, multi-carrier modulation such as orthogonal frequency division multiplexing and via multiple access techniques such as frequency division multiplexing, time division multiplexing, code division multiplexing, multiplexing via differing wave propagation modes and via other modulation and access strategies.
The transmission medium 125 can include a cable having at least one inner portion surrounded by a dielectric material such as an insulator or other dielectric cover, coating or other dielectric material, the dielectric material having an outer surface and a corresponding circumference. In an example embodiment, the transmission medium 125 operates as a single-wire transmission line to guide the transmission of an electromagnetic wave. When the transmission medium 125 is implemented as a single wire transmission system, it can include a wire. The wire can be insulated or uninsulated, and single-stranded or multi-stranded (e.g., braided). In other embodiments, the transmission medium 125 can contain conductors of other shapes or configurations including wire bundles, cables, rods, rails, pipes. In addition, the transmission medium 125 can include non-conductors such as dielectric pipes, rods, rails, or other dielectric members; combinations of conductors and dielectric materials, conductors without dielectric materials or other guided wave transmission media. It should be noted that the transmission medium 125 can otherwise include any of the transmission media previously discussed.
Further, as previously discussed, the guided waves 120 and 122 can be contrasted with radio transmissions over free space/air or conventional propagation of electrical power or signals through the conductor of a wire via an electrical circuit. In addition to the propagation of guided waves 120 and 122 , the transmission medium 125 may optionally contain one or more wires that propagate electrical power or other communication signals in a conventional manner as a part of one or more electrical circuits.
Referring now to FIG. 2 , a block diagram 200 illustrating an example, non-limiting embodiment of a transmission device is shown. The transmission device 101 or 102 includes a communications interface (I/F) 205 , a transceiver 210 and a coupler 220 .
In an example of operation, the communications interface 205 receives a communication signal 110 or 112 that includes data. In various embodiments, the communications interface 205 can include a wireless interface for receiving a wireless communication signal in accordance with a wireless standard protocol such as LTE or other cellular voice and data protocol, WiFi or an 802.11 protocol, WIMAX protocol, Ultra Wideband protocol, Bluetooth protocol, Zigbee protocol, a direct broadcast satellite (DBS) or other satellite communication protocol or other wireless protocol. In addition or in the alternative, the communications interface 205 includes a wired interface that operates in accordance with an Ethernet protocol, universal serial bus (USB) protocol, a data over cable service interface specification (DOCSIS) protocol, a digital subscriber line (DSL) protocol, a Firewire (IEEE 1394) protocol, or other wired protocol. In additional to standards-based protocols, the communications interface 205 can operate in conjunction with other wired or wireless protocol. In addition, the communications interface 205 can optionally operate in conjunction with a protocol stack that includes multiple protocol layers including a MAC protocol, transport protocol, application protocol, etc.
In an example of operation, the transceiver 210 generates an electromagnetic wave based on the communication signal 110 or 112 to convey the data. The electromagnetic wave has at least one carrier frequency and at least one corresponding wavelength. The carrier frequency can be within a millimeter-wave frequency band of 30 GHz-300 GHz, such as 60 GHz or a carrier frequency in the range of 30-40 GHz or a lower frequency band of 300 MHz-30 GHz in the microwave frequency range such as 26-30 GHz, 11 GHz, 6 GHz or 3 GHz, but it will be appreciated that other carrier frequencies are possible in other embodiments. In one mode of operation, the transceiver 210 merely upconverts the communications signal or signals 110 or 112 for transmission of the electromagnetic signal in the microwave or millimeter-wave band as a guided electromagnetic wave that is guided by or bound to the transmission medium 125 . In another mode of operation, the communications interface 205 either converts the communication signal 110 or 112 to a baseband or near baseband signal or extracts the data from the communication signal 110 or 112 and the transceiver 210 modulates a high-frequency carrier with the data, the baseband or near baseband signal for transmission. It should be appreciated that the transceiver 210 can modulate the data received via the communication signal 110 or 112 to preserve one or more data communication protocols of the communication signal 110 or 112 either by encapsulation in the payload of a different protocol or by simple frequency shifting. In the alternative, the transceiver 210 can otherwise translate the data received via the communication signal 110 or 112 to a protocol that is different from the data communication protocol or protocols of the communication signal 110 or 112 .
In an example of operation, the coupler 220 couples the electromagnetic wave to the transmission medium 125 as a guided electromagnetic wave to convey the communications signal or signals 110 or 112 . While the prior description has focused on the operation of the transceiver 210 as a transmitter, the transceiver 210 can also operate to receive electromagnetic waves that convey other data from the single wire transmission medium via the coupler 220 and to generate communications signals 110 or 112 , via communications interface 205 that includes the other data. Consider embodiments where an additional guided electromagnetic wave conveys other data that also propagates along the transmission medium 125 . The coupler 220 can also couple this additional electromagnetic wave from the transmission medium 125 to the transceiver 210 for reception.
The transmission device 101 or 102 includes an optional training controller 230 . In an example embodiment, the training controller 230 is implemented by a standalone processor or a processor that is shared with one or more other components of the transmission device 101 or 102 . The training controller 230 selects the carrier frequencies, modulation schemes and/or guided wave modes for the guided electromagnetic waves based on feedback data received by the transceiver 210 from at least one remote transmission device coupled to receive the guided electromagnetic wave.
In an example embodiment, a guided electromagnetic wave transmitted by a remote transmission device 101 or 102 conveys data that also propagates along the transmission medium 125 . The data from the remote transmission device 101 or 102 can be generated to include the feedback data. In operation, the coupler 220 also couples the guided electromagnetic wave from the transmission medium 125 and the transceiver receives the electromagnetic wave and processes the electromagnetic wave to extract the feedback data.
In an example embodiment, the training controller 230 operates based on the feedback data to evaluate a plurality of candidate frequencies, modulation schemes and/or transmission modes to select a carrier frequency, modulation scheme and/or transmission mode to enhance performance, such as throughput, signal strength, reduce propagation loss, etc.
Consider the following example: a transmission device 101 begins operation under control of the training controller 230 by sending a plurality of guided waves as test signals such as pilot waves or other test signals at a corresponding plurality of candidate frequencies and/or candidate modes directed to a remote transmission device 102 coupled to the transmission medium 125 . The guided waves can include, in addition or in the alternative, test data. The test data can indicate the particular candidate frequency and/or guide-wave mode of the signal. In an embodiment, the training controller 230 at the remote transmission device 102 receives the test signals and/or test data from any of the guided waves that were properly received and determines the best candidate frequency and/or guided wave mode, a set of acceptable candidate frequencies and/or guided wave modes, or a rank ordering of candidate frequencies and/or guided wave modes. This selection of candidate frequenc(ies) or/and guided-mode(s) are generated by the training controller 230 based on one or more optimizing criteria such as received signal strength, bit error rate, packet error rate, signal to noise ratio, propagation loss, etc. The training controller 230 generates feedback data that indicates the selection of candidate frequenc(ies) or/and guided wave mode(s) and sends the feedback data to the transceiver 210 for transmission to the transmission device 101 . The transmission device 101 and 102 can then communicate data with one another based on the selection of candidate frequenc(ies) or/and guided wave mode(s).
In other embodiments, the guided electromagnetic waves that contain the test signals and/or test data are reflected back, repeated back or otherwise looped back by the remote transmission device 102 to the transmission device 101 for reception and analysis by the training controller 230 of the transmission device 101 that initiated these waves. For example, the transmission device 101 can send a signal to the remote transmission device 102 to initiate a test mode where a physical reflector is switched on the line, a termination impedance is changed to cause reflections, a loop back mode is switched on to couple electromagnetic waves back to the source transmission device 102 , and/or a repeater mode is enabled to amplify and retransmit the electromagnetic waves back to the source transmission device 102 . The training controller 230 at the source transmission device 102 receives the test signals and/or test data from any of the guided waves that were properly received and determines selection of candidate frequenc(ies) or/and guided wave mode(s).
While the procedure above has been described in a start-up or initialization mode of operation, each transmission device 101 or 102 can send test signals, evaluate candidate frequencies or guided wave modes via non-test such as normal transmissions or otherwise evaluate candidate frequencies or guided wave modes at other times or continuously as well. In an example embodiment, the communication protocol between the transmission devices 101 and 102 can include an on-request or periodic test mode where either full testing or more limited testing of a subset of candidate frequencies and guided wave modes are tested and evaluated. In other modes of operation, the re-entry into such a test mode can be triggered by a degradation of performance due to a disturbance, weather conditions, etc. In an example embodiment, the receiver bandwidth of the transceiver 210 is either sufficiently wide or swept to receive all candidate frequencies or can be selectively adjusted by the training controller 230 to a training mode where the receiver bandwidth of the transceiver 210 is sufficiently wide or swept to receive all candidate frequencies.
Referring now to FIG. 3 , a graphical diagram 300 illustrating an example, non-limiting embodiment of an electromagnetic field distribution is shown. In this embodiment, a transmission medium 125 in air includes an inner conductor 301 and an insulating jacket 302 of dielectric material, as shown in cross section. The diagram 300 includes different gray-scales that represent differing electromagnetic field strengths generated by the propagation of the guided wave having an asymmetrical and non-fundamental guided wave mode.
In particular, the electromagnetic field distribution corresponds to a modal “sweet spot” that enhances guided electromagnetic wave propagation along an insulated transmission medium and reduces end-to-end transmission loss. In this particular mode, electromagnetic waves are guided by the transmission medium 125 to propagate along an outer surface of the transmission medium—in this case, the outer surface of the insulating jacket 302 . Electromagnetic waves are partially embedded in the insulator and partially radiating on the outer surface of the insulator. In this fashion, electromagnetic waves are “lightly” coupled to the insulator so as to enable electromagnetic wave propagation at long distances with low propagation loss.
As shown, the guided wave has a field structure that lies primarily or substantially outside of the transmission medium 125 that serves to guide the electromagnetic waves. The regions inside the conductor 301 have little or no field. Likewise regions inside the insulating jacket 302 have low field strength. The majority of the electromagnetic field strength is distributed in the lobes 304 at the outer surface of the insulating jacket 302 and in close proximity thereof. The presence of an asymmetric guided wave mode is shown by the high electromagnetic field strengths at the top and bottom of the outer surface of the insulating jacket 302 (in the orientation of the diagram)—as opposed to very small field strengths on the other sides of the insulating jacket 302 .
The example shown corresponds to a 38 GHz electromagnetic wave guided by a wire with a diameter of 1.1 cm and a dielectric insulation of thickness of 0.36 cm. Because the electromagnetic wave is guided by the transmission medium 125 and the majority of the field strength is concentrated in the air outside of the insulating jacket 302 within a limited distance of the outer surface, the guided wave can propagate longitudinally down the transmission medium 125 with very low loss. In the example shown, this “limited distance” corresponds to a distance from the outer surface that is less than half the largest cross sectional dimension of the transmission medium 125 . In this case, the largest cross sectional dimension of the wire corresponds to the overall diameter of 1.82 cm, however, this value can vary with the size and shape of the transmission medium 125 . For example, should the transmission medium 125 be of a rectangular shape with a height of 0.3 cm and a width of 0.4 cm, the largest cross sectional dimension would be the diagonal of 0.5 cm and the corresponding limited distance would be 0.25 cm. The dimensions of the area containing the majority of the field strength also vary with the frequency, and in general, increase as carrier frequencies decrease.
It should also be noted that the components of a guided wave communication system, such as couplers and transmission media can have their own cut-off frequencies for each guided wave mode. The cut-off frequency generally sets forth the lowest frequency that a particular guided wave mode is designed to be supported by that particular component. In an example embodiment, the particular asymmetric mode of propagation shown is induced on the transmission medium 125 by an electromagnetic wave having a frequency that falls within a limited range (such as Fc to 2Fc) of the lower cut-off frequency Fc for this particular asymmetric mode. The lower cut-off frequency Fc is particular to the characteristics of transmission medium 125 . For embodiments as shown that include an inner conductor 301 surrounded by an insulating jacket 302 , this cutoff frequency can vary based on the dimensions and properties of the insulating jacket 302 and potentially the dimensions and properties of the inner conductor 301 and can be determined experimentally to have a desired mode pattern. It should be noted however, that similar effects can be found for a hollow dielectric or insulator without an inner conductor. In this case, the cutoff frequency can vary based on the dimensions and properties of the hollow dielectric or insulator.
At frequencies lower than the lower cut-off frequency, the asymmetric mode is difficult to induce in the transmission medium 125 and fails to propagate for all but trivial distances. As the frequency increases above the limited range of frequencies about the cut-off frequency, the asymmetric mode shifts more and more inward of the insulating jacket 302 . At frequencies much larger than the cut-off frequency, the field strength is no longer concentrated outside of the insulating jacket, but primarily inside of the insulating jacket 302 . While the transmission medium 125 provides strong guidance to the electromagnetic wave and propagation is still possible, ranges are more limited by increased losses due to propagation within the insulating jacket 302 —as opposed to the surrounding air.
Referring now to FIG. 4 , a graphical diagram 400 illustrating an example, non-limiting embodiment of an electromagnetic field distribution is shown. In particular, a cross section diagram 400 , similar to FIG. 3 is shown with common reference numerals used to refer to similar elements. The example shown corresponds to a 60 GHz wave guided by a wire with a diameter of 1.1 cm and a dielectric insulation of thickness of 0.36 cm. Because the frequency of the guided wave is above the limited range of the cut-off frequency of this particular asymmetric mode, much of the field strength has shifted inward of the insulating jacket 302 . In particular, the field strength is concentrated primarily inside of the insulating jacket 302 . While the transmission medium 125 provides strong guidance to the electromagnetic wave and propagation is still possible, ranges are more limited when compared with the embodiment of FIG. 3 , by increased losses due to propagation within the insulating jacket 302 .
Referring now to FIG. 5A , a graphical diagram illustrating an example, non-limiting embodiment of a frequency response is shown. In particular, diagram 500 presents a graph of end-to-end loss (in dB) as a function of frequency, overlaid with electromagnetic field distributions 510 , 520 and 530 at three points for a 200 cm insulated medium voltage wire. The boundary between the insulator and the surrounding air is represented by reference numeral 525 in each electromagnetic field distribution.
As discussed in conjunction with FIG. 3 , an example of a desired asymmetric mode of propagation shown is induced on the transmission medium 125 by an electromagnetic wave having a frequency that falls within a limited range (such as Fc to 2Fc) of the lower cut-off frequency Fc of the transmission medium for this particular asymmetric mode. In particular, the electromagnetic field distribution 520 at 6 GHz falls within this modal “sweet spot” that enhances electromagnetic wave propagation along an insulated transmission medium and reduces end-to-end transmission loss. In this particular mode, guided waves are partially embedded in the insulator and partially radiating on the outer surface of the insulator. In this fashion, the electromagnetic waves are “lightly” coupled to the insulator so as to enable guided electromagnetic wave propagation at long distances with low propagation loss.
At lower frequencies represented by the electromagnetic field distribution 510 at 3 GHz, the asymmetric mode radiates more heavily generating higher propagation losses. At higher frequencies represented by the electromagnetic field distribution 530 at 9 GHz, the asymmetric mode shifts more and more inward of the insulating jacket providing too much absorption, again generating higher propagation losses.
Referring now to FIG. 5B , a graphical diagram 550 illustrating example, non-limiting embodiments of a longitudinal cross-section of a transmission medium 125 , such as an insulated wire, depicting fields of guided electromagnetic waves at various operating frequencies is shown. As shown in diagram 556 , when the guided electromagnetic waves are at approximately the cutoff frequency (f c ) corresponding to the modal “sweet spot”, the guided electromagnetic waves are loosely coupled to the insulated wire so that absorption is reduced, and the fields of the guided electromagnetic waves are bound sufficiently to reduce the amount radiated into the environment (e.g., air). Because absorption and radiation of the fields of the guided electromagnetic waves is low, propagation losses are consequently low, enabling the guided electromagnetic waves to propagate for longer distances.
As shown in diagram 554 , propagation losses increase when an operating frequency of the guide electromagnetic waves increases above about two-times the cutoff frequency (f c )—or as referred to, above the range of the “sweet spot”. More of the field strength of the electromagnetic wave is driven inside the insulating layer, increasing propagation losses. At frequencies much higher than the cutoff frequency (f c ) the guided electromagnetic waves are strongly bound to the insulated wire as a result of the fields emitted by the guided electromagnetic waves being concentrated in the insulation layer of the wire, as shown in diagram 552 . This in turn raises propagation losses further due to absorption of the guided electromagnetic waves by the insulation layer. Similarly, propagation losses increase when the operating frequency of the guided electromagnetic waves is substantially below the cutoff frequency (f c ), as shown in diagram 558 . At frequencies much lower than the cutoff frequency (f c ) the guided electromagnetic waves are weakly (or nominally) bound to the insulated wire and thereby tend to radiate into the environment (e.g., air), which in turn, raises propagation losses due to radiation of the guided electromagnetic waves.
Referring now to FIG. 6 , a graphical diagram 600 illustrating an example, non-limiting embodiment of an electromagnetic field distribution is shown. In this embodiment, a transmission medium 602 is a bare wire, as shown in cross section. The diagram 300 includes different gray-scales that represent differing electromagnetic field strengths generated by the propagation of a guided wave having a symmetrical and fundamental guided wave mode at a single carrier frequency.
In this particular mode, electromagnetic waves are guided by the transmission medium 602 to propagate along an outer surface of the transmission medium—in this case, the outer surface of the bare wire. Electromagnetic waves are “lightly” coupled to the wire so as to enable electromagnetic wave propagation at long distances with low propagation loss. As shown, the guided wave has a field structure that lies substantially outside of the transmission medium 602 that serves to guide the electromagnetic waves. The regions inside the conductor have little or no field.
Referring now to FIG. 7 , a block diagram 700 illustrating an example, non-limiting embodiment of an arc coupler is shown. In particular a coupling device is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . The coupling device includes an arc coupler 704 coupled to a transmitter circuit 712 and termination or damper 714 . The arc coupler 704 can be made of a dielectric material, or other low-loss insulator (e.g., Teflon, polyethylene, etc.), or made of a conducting (e.g., metallic, non-metallic, etc.) material, or any combination of the foregoing materials. As shown, the arc coupler 704 operates as a waveguide and has a wave 706 propagating as a guided wave about a waveguide surface of the arc coupler 704 . In the embodiment shown, at least a portion of the arc coupler 704 can be placed near a wire 702 or other transmission medium, (such as transmission medium 125 ), in order to facilitate coupling between the arc coupler 704 and the wire 702 or other transmission medium, as described herein to launch the guided wave 708 on the wire. The arc coupler 704 can be placed such that a portion of the curved arc coupler 704 is tangential to, and parallel or substantially parallel to the wire 702 . The portion of the arc coupler 704 that is parallel to the wire can be an apex of the curve, or any point where a tangent of the curve is parallel to the wire 702 . When the arc coupler 704 is positioned or placed thusly, the wave 706 travelling along the arc coupler 704 couples, at least in part, to the wire 702 , and propagates as guided wave 708 around or about the wire surface of the wire 702 and longitudinally along the wire 702 . The guided wave 708 can be characterized as a surface wave or other electromagnetic wave that is guided by or bound to the wire 702 or other transmission medium.
A portion of the wave 706 that does not couple to the wire 702 propagates as a wave 710 along the arc coupler 704 . It will be appreciated that the arc coupler 704 can be configured and arranged in a variety of positions in relation to the wire 702 to achieve a desired level of coupling or non-coupling of the wave 706 to the wire 702 . For example, the curvature and/or length of the arc coupler 704 that is parallel or substantially parallel, as well as its separation distance (which can include zero separation distance in an embodiment), to the wire 702 can be varied without departing from example embodiments. Likewise, the arrangement of arc coupler 704 in relation to the wire 702 may be varied based upon considerations of the respective intrinsic characteristics (e.g., thickness, composition, electromagnetic properties, etc.) of the wire 702 and the arc coupler 704 , as well as the characteristics (e.g., frequency, energy level, etc.) of the waves 706 and 708 .
The guided wave 708 stays parallel or substantially parallel to the wire 702 , even as the wire 702 bends and flexes. Bends in the wire 702 can increase transmission losses, which are also dependent on wire diameters, frequency, and materials. If the dimensions of the arc coupler 704 are chosen for efficient power transfer, most of the power in the wave 706 is transferred to the wire 702 , with little power remaining in wave 710 . It will be appreciated that the guided wave 708 can still be multi-modal in nature (discussed herein), including having modes that are non-fundamental or asymmetric, while traveling along a path that is parallel or substantially parallel to the wire 702 , with or without a fundamental transmission mode. In an embodiment, non-fundamental or asymmetric modes can be utilized to minimize transmission losses and/or obtain increased propagation distances.
It is noted that the term parallel is generally a geometric construct which often is not exactly achievable in real systems. Accordingly, the term parallel as utilized in the subject disclosure represents an approximation rather than an exact configuration when used to describe embodiments disclosed in the subject disclosure. In an embodiment, substantially parallel can include approximations that are within 30 degrees of true parallel in all dimensions.
In an embodiment, the wave 706 can exhibit one or more wave propagation modes. The arc coupler modes can be dependent on the shape and/or design of the coupler 704 . The one or more arc coupler modes of wave 706 can generate, influence, or impact one or more wave propagation modes of the guided wave 708 propagating along wire 702 . It should be particularly noted however that the guided wave modes present in the guided wave 706 may be the same or different from the guided wave modes of the guided wave 708 . In this fashion, one or more guided wave modes of the guided wave 706 may not be transferred to the guided wave 708 , and further one or more guided wave modes of guided wave 708 may not have been present in guided wave 706 . It should also be noted that the cut-off frequency of the arc coupler 704 for a particular guided wave mode may be different than the cutoff frequency of the wire 702 or other transmission medium for that same mode. For example, while the wire 702 or other transmission medium may be operated slightly above its cutoff frequency for a particular guided wave mode, the arc coupler 704 may be operated well above its cut-off frequency for that same mode for low loss, slightly below its cut-off frequency for that same mode to, for example, induce greater coupling and power transfer, or some other point in relation to the arc coupler's cutoff frequency for that mode.
In an embodiment, the wave propagation modes on the wire 702 can be similar to the arc coupler modes since both waves 706 and 708 propagate about the outside of the arc coupler 704 and wire 702 respectively. In some embodiments, as the wave 706 couples to the wire 702 , the modes can change form, or new modes can be created or generated, due to the coupling between the arc coupler 704 and the wire 702 . For example, differences in size, material, and/or impedances of the arc coupler 704 and wire 702 may create additional modes not present in the arc coupler modes and/or suppress some of the arc coupler modes. The wave propagation modes can comprise the fundamental transverse electromagnetic mode (Quasi-TEM 00 ), where only small electric and/or magnetic fields extend in the direction of propagation, and the electric and magnetic fields extend radially outwards while the guided wave propagates along the wire. This guided wave mode can be donut shaped, where few of the electromagnetic fields exist within the arc coupler 704 or wire 702 .
Waves 706 and 708 can comprise a fundamental TEM mode where the fields extend radially outwards, and also comprise other, non-fundamental (e.g., asymmetric, higher-level, etc.) modes. While particular wave propagation modes are discussed above, other wave propagation modes are likewise possible such as transverse electric (TE) and transverse magnetic (TM) modes, based on the frequencies employed, the design of the arc coupler 704 , the dimensions and composition of the wire 702 , as well as its surface characteristics, its insulation if present, the electromagnetic properties of the surrounding environment, etc. It should be noted that, depending on the frequency, the electrical and physical characteristics of the wire 702 and the particular wave propagation modes that are generated, guided wave 708 can travel along the conductive surface of an oxidized uninsulated wire, an unoxidized uninsulated wire, an insulated wire and/or along the insulating surface of an insulated wire.
In an embodiment, a diameter of the arc coupler 704 is smaller than the diameter of the wire 702 . For the millimeter-band wavelength being used, the arc coupler 704 supports a single waveguide mode that makes up wave 706 . This single waveguide mode can change as it couples to the wire 702 as guided wave 708 . If the arc coupler 704 were larger, more than one waveguide mode can be supported, but these additional waveguide modes may not couple to the wire 702 as efficiently, and higher coupling losses can result. However, in some alternative embodiments, the diameter of the arc coupler 704 can be equal to or larger than the diameter of the wire 702 , for example, where higher coupling losses are desirable or when used in conjunction with other techniques to otherwise reduce coupling losses (e.g., impedance matching with tapering, etc.).
In an embodiment, the wavelength of the waves 706 and 708 are comparable in size, or smaller than a circumference of the arc coupler 704 and the wire 702 . In an example, if the wire 702 has a diameter of 0.5 cm, and a corresponding circumference of around 1.5 cm, the wavelength of the transmission is around 1.5 cm or less, corresponding to a frequency of 70 GHz or greater. In another embodiment, a suitable frequency of the transmission and the carrier-wave signal is in the range of 30-100 GHz, perhaps around 30-60 GHz, and around 38 GHz in one example. In an embodiment, when the circumference of the arc coupler 704 and wire 702 is comparable in size to, or greater, than a wavelength of the transmission, the waves 706 and 708 can exhibit multiple wave propagation modes including fundamental and/or non-fundamental (symmetric and/or asymmetric) modes that propagate over sufficient distances to support various communication systems described herein. The waves 706 and 708 can therefore comprise more than one type of electric and magnetic field configuration. In an embodiment, as the guided wave 708 propagates down the wire 702 , the electrical and magnetic field configurations will remain the same from end to end of the wire 702 . In other embodiments, as the guided wave 708 encounters interference (distortion or obstructions) or loses energy due to transmission losses or scattering, the electric and magnetic field configurations can change as the guided wave 708 propagates down wire 702 .
In an embodiment, the arc coupler 704 can be composed of nylon, Teflon, polyethylene, a polyamide, or other plastics. In other embodiments, other dielectric materials are possible. The wire surface of wire 702 can be metallic with either a bare metallic surface, or can be insulated using plastic, dielectric, insulator or other coating, jacket or sheathing. In an embodiment, a dielectric or otherwise non-conducting/insulated waveguide can be paired with either a bare/metallic wire or insulated wire. In other embodiments, a metallic and/or conductive waveguide can be paired with a bare/metallic wire or insulated wire. In an embodiment, an oxidation layer on the bare metallic surface of the wire 702 (e.g., resulting from exposure of the bare metallic surface to oxygen/air) can also provide insulating or dielectric properties similar to those provided by some insulators or sheathings.
It is noted that the graphical representations of waves 706 , 708 and 710 are presented merely to illustrate the principles that wave 706 induces or otherwise launches a guided wave 708 on a wire 702 that operates, for example, as a single wire transmission line. Wave 710 represents the portion of wave 706 that remains on the arc coupler 704 after the generation of guided wave 708 . The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on the frequencies employed, the particular wave propagation mode or modes, the design of the arc coupler 704 , the dimensions and composition of the wire 702 , as well as its surface characteristics, its optional insulation, the electromagnetic properties of the surrounding environment, etc.
It is noted that arc coupler 704 can include a termination circuit or damper 714 at the end of the arc coupler 704 that can absorb leftover radiation or energy from wave 710 . The termination circuit or damper 714 can prevent and/or minimize the leftover radiation or energy from wave 710 reflecting back toward transmitter circuit 712 . In an embodiment, the termination circuit or damper 714 can include termination resistors, and/or other components that perform impedance matching to attenuate reflection. In some embodiments, if the coupling efficiencies are high enough, and/or wave 710 is sufficiently small, it may not be necessary to use a termination circuit or damper 714 . For the sake of simplicity, these transmitter 712 and termination circuits or dampers 714 may not be depicted in the other figures, but in those embodiments, transmitter and termination circuits or dampers may possibly be used.
Further, while a single arc coupler 704 is presented that generates a single guided wave 708 , multiple arc couplers 704 placed at different points along the wire 702 and/or at different azimuthal orientations about the wire can be employed to generate and receive multiple guided waves 708 at the same or different frequencies, at the same or different phases, at the same or different wave propagation modes.
FIG. 8 , a block diagram 800 illustrating an example, non-limiting embodiment of an arc coupler is shown. In the embodiment shown, at least a portion of the coupler 704 can be placed near a wire 702 or other transmission medium, (such as transmission medium 125 ), in order to facilitate coupling between the arc coupler 704 and the wire 702 or other transmission medium, to extract a portion of the guided wave 806 as a guided wave 808 as described herein. The arc coupler 704 can be placed such that a portion of the curved arc coupler 704 is tangential to, and parallel or substantially parallel to the wire 702 . The portion of the arc coupler 704 that is parallel to the wire can be an apex of the curve, or any point where a tangent of the curve is parallel to the wire 702 . When the arc coupler 704 is positioned or placed thusly, the wave 806 travelling along the wire 702 couples, at least in part, to the arc coupler 704 , and propagates as guided wave 808 along the arc coupler 704 to a receiving device (not expressly shown). A portion of the wave 806 that does not couple to the arc coupler propagates as wave 810 along the wire 702 or other transmission medium.
In an embodiment, the wave 806 can exhibit one or more wave propagation modes. The arc coupler modes can be dependent on the shape and/or design of the coupler 704 . The one or more modes of guided wave 806 can generate, influence, or impact one or more guide-wave modes of the guided wave 808 propagating along the arc coupler 704 . It should be particularly noted however that the guided wave modes present in the guided wave 806 may be the same or different from the guided wave modes of the guided wave 808 . In this fashion, one or more guided wave modes of the guided wave 806 may not be transferred to the guided wave 808 , and further one or more guided wave modes of guided wave 808 may not have been present in guided wave 806 .
Referring now to FIG. 9A , a block diagram 900 illustrating an example, non-limiting embodiment of a stub coupler is shown. In particular a coupling device that includes stub coupler 904 is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . The stub coupler 904 can be made of a dielectric material, or other low-loss insulator (e.g., Teflon, polyethylene and etc.), or made of a conducting (e.g., metallic, non-metallic, etc.) material, or any combination of the foregoing materials. As shown, the stub coupler 904 operates as a waveguide and has a wave 906 propagating as a guided wave about a waveguide surface of the stub coupler 904 . In the embodiment shown, at least a portion of the stub coupler 904 can be placed near a wire 702 or other transmission medium, (such as transmission medium 125 ), in order to facilitate coupling between the stub coupler 904 and the wire 702 or other transmission medium, as described herein to launch the guided wave 908 on the wire.
In an embodiment, the stub coupler 904 is curved, and an end of the stub coupler 904 can be tied, fastened, or otherwise mechanically coupled to a wire 702 . When the end of the stub coupler 904 is fastened to the wire 702 , the end of the stub coupler 904 is parallel or substantially parallel to the wire 702 . Alternatively, another portion of the dielectric waveguide beyond an end can be fastened or coupled to wire 702 such that the fastened or coupled portion is parallel or substantially parallel to the wire 702 . The fastener 910 can be a nylon cable tie or other type of non-conducting/dielectric material that is either separate from the stub coupler 904 or constructed as an integrated component of the stub coupler 904 . The stub coupler 904 can be adjacent to the wire 702 without surrounding the wire 702 .
Like the arc coupler 704 described in conjunction with FIG. 7 , when the stub coupler 904 is placed with the end parallel to the wire 702 , the guided wave 906 travelling along the stub coupler 904 couples to the wire 702 , and propagates as guided wave 908 about the wire surface of the wire 702 . In an example embodiment, the guided wave 908 can be characterized as a surface wave or other electromagnetic wave.
It is noted that the graphical representations of waves 906 and 908 are presented merely to illustrate the principles that wave 906 induces or otherwise launches a guided wave 908 on a wire 702 that operates, for example, as a single wire transmission line. The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on one or more of the shape and/or design of the coupler, the relative position of the dielectric waveguide to the wire, the frequencies employed, the design of the stub coupler 904 , the dimensions and composition of the wire 702 , as well as its surface characteristics, its optional insulation, the electromagnetic properties of the surrounding environment, etc.
In an embodiment, an end of stub coupler 904 can taper towards the wire 702 in order to increase coupling efficiencies. Indeed, the tapering of the end of the stub coupler 904 can provide impedance matching to the wire 702 and reduce reflections, according to an example embodiment of the subject disclosure. For example, an end of the stub coupler 904 can be gradually tapered in order to obtain a desired level of coupling between waves 906 and 908 as illustrated in FIG. 9A .
In an embodiment, the fastener 910 can be placed such that there is a short length of the stub coupler 904 between the fastener 910 and an end of the stub coupler 904 . Maximum coupling efficiencies are realized in this embodiment when the length of the end of the stub coupler 904 that is beyond the fastener 910 is at least several wavelengths long for whatever frequency is being transmitted.
Turning now to FIG. 9B , a diagram 950 illustrating an example, non-limiting embodiment of an electromagnetic distribution in accordance with various aspects described herein is shown. In particular, an electromagnetic distribution is presented in two dimensions for a transmission device that includes coupler 952 , shown in an example stub coupler constructed of a dielectric material. The coupler 952 couples an electromagnetic wave for propagation as a guided wave along an outer surface of a wire 702 or other transmission medium.
The coupler 952 guides the electromagnetic wave to a junction at x 0 via a symmetrical guided wave mode. While some of the energy of the electromagnetic wave that propagates along the coupler 952 is outside of the coupler 952 , the majority of the energy of this electromagnetic wave is contained within the coupler 952 . The junction at x 0 couples the electromagnetic wave to the wire 702 or other transmission medium at an azimuthal angle corresponding to the bottom of the transmission medium. This coupling induces an electromagnetic wave that is guided to propagate along the outer surface of the wire 702 or other transmission medium via at least one guided wave mode in direction 956 . The majority of the energy of the guided electromagnetic wave is outside or, but in close proximity to the outer surface of the wire 702 or other transmission medium. In the example shown, the junction at x 0 forms an electromagnetic wave that propagates via both a symmetrical mode and at least one asymmetrical surface mode, such as the first order mode presented in conjunction with FIG. 3 , that skims the surface of the wire 702 or other transmission medium.
It is noted that the graphical representations of guided waves are presented merely to illustrate an example of guided wave coupling and propagation. The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on the frequencies employed, the design and/or configuration of the coupler 952 , the dimensions and composition of the wire 702 or other transmission medium, as well as its surface characteristics, its insulation if present, the electromagnetic properties of the surrounding environment, etc.
Turning now to FIG. 10A , illustrated is a block diagram 1000 of an example, non-limiting embodiment of a coupler and transceiver system in accordance with various aspects described herein. The system is an example of transmission device 101 or 102 . In particular, the communication interface 1008 is an example of communications interface 205 , the stub coupler 1002 is an example of coupler 220 , and the transmitter/receiver device 1006 , diplexer 1016 , power amplifier 1014 , low noise amplifier 1018 , frequency mixers 1010 and 1020 and local oscillator 1012 collectively form an example of transceiver 210 .
In operation, the transmitter/receiver device 1006 launches and receives waves (e.g., guided wave 1004 onto stub coupler 1002 ). The guided waves 1004 can be used to transport signals received from and sent to a host device, base station, mobile devices, a building or other device by way of a communications interface 1008 . The communications interface 1008 can be an integral part of system 1000 . Alternatively, the communications interface 1008 can be tethered to system 1000 . The communications interface 1008 can comprise a wireless interface for interfacing to the host device, base station, mobile devices, a building or other device utilizing any of various wireless signaling protocols (e.g., LTE, WiFi, WiMAX, IEEE 802.xx, etc.) including an infrared protocol such as an infrared data association (IrDA) protocol or other line of sight optical protocol. The communications interface 1008 can also comprise a wired interface such as a fiber optic line, coaxial cable, twisted pair, category 5 (CAT-5) cable or other suitable wired or optical mediums for communicating with the host device, base station, mobile devices, a building or other device via a protocol such as an Ethernet protocol, universal serial bus (USB) protocol, a data over cable service interface specification (DOCSIS) protocol, a digital subscriber line (DSL) protocol, a Firewire (IEEE 1394) protocol, or other wired or optical protocol. For embodiments where system 1000 functions as a repeater, the communications interface 1008 may not be necessary.
The output signals (e.g., Tx) of the communications interface 1008 can be combined with a carrier wave (e.g., millimeter-wave carrier wave) generated by a local oscillator 1012 at frequency mixer 1010 . Frequency mixer 1010 can use heterodyning techniques or other frequency shifting techniques to frequency shift the output signals from communications interface 1008 . For example, signals sent to and from the communications interface 1008 can be modulated signals such as orthogonal frequency division multiplexed (OFDM) signals formatted in accordance with a Long-Term Evolution (LTE) wireless protocol or other wireless 3G, 4G, 5G or higher voice and data protocol, a Zigbee, WIMAX, UltraWideband or IEEE 802.11 wireless protocol; a wired protocol such as an Ethernet protocol, universal serial bus (USB) protocol, a data over cable service interface specification (DOCSIS) protocol, a digital subscriber line (DSL) protocol, a Firewire (IEEE 1394) protocol or other wired or wireless protocol. In an example embodiment, this frequency conversion can be done in the analog domain, and as a result, the frequency shifting can be done without regard to the type of communications protocol used by a base station, mobile devices, or in-building devices. As new communications technologies are developed, the communications interface 1008 can be upgraded (e.g., updated with software, firmware, and/or hardware) or replaced and the frequency shifting and transmission apparatus can remain, simplifying upgrades. The carrier wave can then be sent to a power amplifier (“PA”) 1014 and can be transmitted via the transmitter receiver device 1006 via the diplexer 1016 .
Signals received from the transmitter/receiver device 1006 that are directed towards the communications interface 1008 can be separated from other signals via diplexer 1016 . The received signal can then be sent to low noise amplifier (“LNA”) 1018 for amplification. A frequency mixer 1020 , with help from local oscillator 1012 can downshift the received signal (which is in the millimeter-wave band or around 38 GHz in some embodiments) to the native frequency. The communications interface 1008 can then receive the transmission at an input port (Rx).
In an embodiment, transmitter/receiver device 1006 can include a cylindrical or non-cylindrical metal (which, for example, can be hollow in an embodiment, but not necessarily drawn to scale) or other conducting or non-conducting waveguide and an end of the stub coupler 1002 can be placed in or in proximity to the waveguide or the transmitter/receiver device 1006 such that when the transmitter/receiver device 1006 generates a transmission, the guided wave couples to stub coupler 1002 and propagates as a guided wave 1004 about the waveguide surface of the stub coupler 1002 . In some embodiments, the guided wave 1004 can propagate in part on the outer surface of the stub coupler 1002 and in part inside the stub coupler 1002 . In other embodiments, the guided wave 1004 can propagate substantially or completely on the outer surface of the stub coupler 1002 . In yet other embodiments, the guided wave 1004 can propagate substantially or completely inside the stub coupler 1002 . In this latter embodiment, the guided wave 1004 can radiate at an end of the stub coupler 1002 (such as the tapered end shown in FIG. 4 ) for coupling to a transmission medium such as a wire 702 of FIG. 7 . Similarly, if guided wave 1004 is incoming (coupled to the stub coupler 1002 from a wire 702 ), guided wave 1004 then enters the transmitter/receiver device 1006 and couples to the cylindrical waveguide or conducting waveguide. While transmitter/receiver device 1006 is shown to include a separate waveguide—an antenna, cavity resonator, klystron, magnetron, travelling wave tube, or other radiating element can be employed to induce a guided wave on the coupler 1002 , with or without the separate waveguide.
In an embodiment, stub coupler 1002 can be wholly constructed of a dielectric material (or another suitable insulating material), without any metallic or otherwise conducting materials therein. Stub coupler 1002 can be composed of nylon, Teflon, polyethylene, a polyamide, other plastics, or other materials that are non-conducting and suitable for facilitating transmission of electromagnetic waves at least in part on an outer surface of such materials. In another embodiment, stub coupler 1002 can include a core that is conducting/metallic, and have an exterior dielectric surface. Similarly, a transmission medium that couples to the stub coupler 1002 for propagating electromagnetic waves induced by the stub coupler 1002 or for supplying electromagnetic waves to the stub coupler 1002 can, in addition to being a bare or insulated wire, be wholly constructed of a dielectric material (or another suitable insulating material), without any metallic or otherwise conducting materials therein.
It is noted that although FIG. 10A shows that the opening of transmitter receiver device 1006 is much wider than the stub coupler 1002 , this is not to scale, and that in other embodiments the width of the stub coupler 1002 is comparable or slightly smaller than the opening of the hollow waveguide. It is also not shown, but in an embodiment, an end of the coupler 1002 that is inserted into the transmitter/receiver device 1006 tapers down in order to reduce reflection and increase coupling efficiencies.
Before coupling to the stub coupler 1002 , the one or more waveguide modes of the guided wave generated by the transmitter/receiver device 1006 can couple to the stub coupler 1002 to induce one or more wave propagation modes of the guided wave 1004 . The wave propagation modes of the guided wave 1004 can be different than the hollow metal waveguide modes due to the different characteristics of the hollow metal waveguide and the dielectric waveguide. For instance, wave propagation modes of the guided wave 1004 can comprise the fundamental transverse electromagnetic mode (Quasi-TEM 00 ), where only small electrical and/or magnetic fields extend in the direction of propagation, and the electric and magnetic fields extend radially outwards from the stub coupler 1002 while the guided waves propagate along the stub coupler 1002 . The fundamental transverse electromagnetic mode wave propagation mode may or may not exist inside a waveguide that is hollow. Therefore, the hollow metal waveguide modes that are used by transmitter/receiver device 1006 are waveguide modes that can couple effectively and efficiently to wave propagation modes of stub coupler 1002 .
It will be appreciated that other constructs or combinations of the transmitter/receiver device 1006 and stub coupler 1002 are possible. For example, a stub coupler 1002 ′ can be placed tangentially or in parallel (with or without a gap) with respect to an outer surface of the hollow metal waveguide of the transmitter/receiver device 1006 ′ (corresponding circuitry not shown) as depicted by reference 1000 ′ of FIG. 10B . In another embodiment, not shown by reference 1000 ′, the stub coupler 1002 ′ can be placed inside the hollow metal waveguide of the transmitter/receiver device 1006 ′ without an axis of the stub coupler 1002 ′ being coaxially aligned with an axis of the hollow metal waveguide of the transmitter/receiver device 1006 ′. In either of these embodiments, the guided wave generated by the transmitter/receiver device 1006 ′ can couple to a surface of the stub coupler 1002 ′ to induce one or more wave propagation modes of the guided wave 1004 ′ on the stub coupler 1002 ′ including a fundamental mode (e.g., a symmetric mode) and/or a non-fundamental mode (e.g., asymmetric mode).
In one embodiment, the guided wave 1004 ′ can propagate in part on the outer surface of the stub coupler 1002 ′ and in part inside the stub coupler 1002 ′. In another embodiment, the guided wave 1004 ′ can propagate substantially or completely on the outer surface of the stub coupler 1002 ′. In yet other embodiments, the guided wave 1004 ′ can propagate substantially or completely inside the stub coupler 1002 ′. In this latter embodiment, the guided wave 1004 ′ can radiate at an end of the stub coupler 1002 ′ (such as the tapered end shown in FIG. 9 ) for coupling to a transmission medium such as a wire 702 of FIG. 9 .
It will be further appreciated that other constructs the transmitter/receiver device 1006 are possible. For example, a hollow metal waveguide of a transmitter/receiver device 1006 ″ (corresponding circuitry not shown), depicted in FIG. 10B as reference 1000 ″, can be placed tangentially or in parallel (with or without a gap) with respect to an outer surface of a transmission medium such as the wire 702 of FIG. 4 without the use of the stub coupler 1002 . In this embodiment, the guided wave generated by the transmitter/receiver device 1006 ″ can couple to a surface of the wire 702 to induce one or more wave propagation modes of a guided wave 908 on the wire 702 including a fundamental mode (e.g., a symmetric mode) and/or a non-fundamental mode (e.g., asymmetric mode). In another embodiment, the wire 702 can be positioned inside a hollow metal waveguide of a transmitter/receiver device 1006 ′″ (corresponding circuitry not shown) so that an axis of the wire 702 is coaxially (or not coaxially) aligned with an axis of the hollow metal waveguide without the use of the stub coupler 1002 —see FIGS. 10B reference 1000 ′″. In this embodiment, the guided wave generated by the transmitter/receiver device 1006 ′″ can couple to a surface of the wire 702 to induce one or more wave propagation modes of a guided wave 908 on the wire including a fundamental mode (e.g., a symmetric mode) and/or a non-fundamental mode (e.g., asymmetric mode).
In the embodiments of 1000 ″ and 1000 ′″, for a wire 702 having an insulated outer surface, the guided wave 908 can propagate in part on the outer surface of the insulator and in part inside the insulator. In embodiments, the guided wave 908 can propagate substantially or completely on the outer surface of the insulator, or substantially or completely inside the insulator. In the embodiments of 1000 ″ and 1000 ′″, for a wire 702 that is a bare conductor, the guided wave 908 can propagate in part on the outer surface of the conductor and in part inside the conductor. In another embodiment, the guided wave 908 can propagate substantially or completely on the outer surface of the conductor.
Referring now to FIG. 11 , a block diagram 1100 illustrating an example, non-limiting embodiment of a dual stub coupler is shown. In particular, a dual coupler design is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . In an embodiment, two or more couplers (such as the stub couplers 1104 and 1106 ) can be positioned around a wire 1102 in order to receive guided wave 1108 . In an embodiment, one coupler is enough to receive the guided wave 1108 . In that case, guided wave 1108 couples to coupler 1104 and propagates as guided wave 1110 . If the field structure of the guided wave 1108 oscillates or undulates around the wire 1102 due to the particular guided wave mode(s) or various outside factors, then coupler 1106 can be placed such that guided wave 1108 couples to coupler 1106 . In some embodiments, four or more couplers can be placed around a portion of the wire 1102 , e.g., at 90 degrees or another spacing with respect to each other, in order to receive guided waves that may oscillate or rotate around the wire 1102 , that have been induced at different azimuthal orientations or that have non-fundamental or higher order modes that, for example, have lobes and/or nulls or other asymmetries that are orientation dependent. However, it will be appreciated that there may be less than or more than four couplers placed around a portion of the wire 1102 without departing from example embodiments.
It should be noted that while couplers 1106 and 1104 are illustrated as stub couplers, any other of the coupler designs described herein including arc couplers, antenna or horn couplers, magnetic couplers, etc., could likewise be used. It will also be appreciated that while some example embodiments have presented a plurality of couplers around at least a portion of a wire 1102 , this plurality of couplers can also be considered as part of a single coupler system having multiple coupler subcomponents. For example, two or more couplers can be manufactured as single system that can be installed around a wire in a single installation such that the couplers are either pre-positioned or adjustable relative to each other (either manually or automatically with a controllable mechanism such as a motor or other actuator) in accordance with the single system.
Receivers coupled to couplers 1106 and 1104 can use diversity combining to combine signals received from both couplers 1106 and 1104 in order to maximize the signal quality. In other embodiments, if one or the other of the couplers 1104 and 1106 receive a transmission that is above a predetermined threshold, receivers can use selection diversity when deciding which signal to use. Further, while reception by a plurality of couplers 1106 and 1104 is illustrated, transmission by couplers 1106 and 1104 in the same configuration can likewise take place. In particular, a wide range of multi-input multi-output (MIMO) transmission and reception techniques can be employed for transmissions where a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 includes multiple transceivers and multiple couplers.
It is noted that the graphical representations of waves 1108 and 1110 are presented merely to illustrate the principles that guided wave 1108 induces or otherwise launches a wave 1110 on a coupler 1104 . The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on the frequencies employed, the design of the coupler 1104 , the dimensions and composition of the wire 1102 , as well as its surface characteristics, its insulation if any, the electromagnetic properties of the surrounding environment, etc.
Referring now to FIG. 12 , a block diagram 1200 illustrating an example, non-limiting embodiment of a repeater system is shown. In particular, a repeater device 1210 is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . In this system, two couplers 1204 and 1214 can be placed near a wire 1202 or other transmission medium such that guided waves 1205 propagating along the wire 1202 are extracted by coupler 1204 as wave 1206 (e.g. as a guided wave), and then are boosted or repeated by repeater device 1210 and launched as a wave 1216 (e.g. as a guided wave) onto coupler 1214 . The wave 1216 can then be launched on the wire 1202 and continue to propagate along the wire 1202 as a guided wave 1217 . In an embodiment, the repeater device 1210 can receive at least a portion of the power utilized for boosting or repeating through magnetic coupling with the wire 1202 , for example, when the wire 1202 is a power line or otherwise contains a power-carrying conductor. It should be noted that while couplers 1204 and 1214 are illustrated as stub couplers, any other of the coupler designs described herein including arc couplers, antenna or horn couplers, magnetic couplers, or the like, could likewise be used.
In some embodiments, repeater device 1210 can repeat the transmission associated with wave 1206 , and in other embodiments, repeater device 1210 can include a communications interface 205 that extracts data or other signals from the wave 1206 for supplying such data or signals to another network and/or one or more other devices as communication signals 110 or 112 and/or receiving communication signals 110 or 112 from another network and/or one or more other devices and launch guided wave 1216 having embedded therein the received communication signals 110 or 112 . In a repeater configuration, receiver waveguide 1208 can receive the wave 1206 from the coupler 1204 and transmitter waveguide 1212 can launch guided wave 1216 onto coupler 1214 as guided wave 1217 . Between receiver waveguide 1208 and transmitter waveguide 1212 , the signal embedded in guided wave 1206 and/or the guided wave 1216 itself can be amplified to correct for signal loss and other inefficiencies associated with guided wave communications or the signal can be received and processed to extract the data contained therein and regenerated for transmission. In an embodiment, the receiver waveguide 1208 can be configured to extract data from the signal, process the data to correct for data errors utilizing for example error correcting codes, and regenerate an updated signal with the corrected data. The transmitter waveguide 1212 can then transmit guided wave 1216 with the updated signal embedded therein. In an embodiment, a signal embedded in guided wave 1206 can be extracted from the transmission and processed for communication with another network and/or one or more other devices via communications interface 205 as communication signals 110 or 112 . Similarly, communication signals 110 or 112 received by the communications interface 205 can be inserted into a transmission of guided wave 1216 that is generated and launched onto coupler 1214 by transmitter waveguide 1212 .
It is noted that although FIG. 12 shows guided wave transmissions 1206 and 1216 entering from the left and exiting to the right respectively, this is merely a simplification and is not intended to be limiting. In other embodiments, receiver waveguide 1208 and transmitter waveguide 1212 can also function as transmitters and receivers respectively, allowing the repeater device 1210 to be bi-directional.
In an embodiment, repeater device 1210 can be placed at locations where there are discontinuities or obstacles on the wire 1202 or other transmission medium. In the case where the wire 1202 is a power line, these obstacles can include transformers, connections, utility poles, and other such power line devices. The repeater device 1210 can help the guided (e.g., surface) waves jump over these obstacles on the line and boost the transmission power at the same time. In other embodiments, a coupler can be used to jump over the obstacle without the use of a repeater device. In that embodiment, both ends of the coupler can be tied or fastened to the wire, thus providing a path for the guided wave to travel without being blocked by the obstacle.
Turning now to FIG. 13 , illustrated is a block diagram 1300 of an example, non-limiting embodiment of a bidirectional repeater in accordance with various aspects described herein. In particular, a bidirectional repeater device 1306 is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . It should be noted that while the couplers are illustrated as stub couplers, any other of the coupler designs described herein including arc couplers, antenna or horn couplers, magnetic couplers, or the like, could likewise be used. The bidirectional repeater 1306 can employ diversity paths in the case of when two or more wires or other transmission media are present. Since guided wave transmissions have different transmission efficiencies and coupling efficiencies for transmission medium of different types such as insulated wires, un-insulated wires or other types of transmission media and further, if exposed to the elements, can be affected by weather, and other atmospheric conditions, it can be advantageous to selectively transmit on different transmission media at certain times. In various embodiments, the various transmission media can be designated as a primary, secondary, tertiary, etc. whether or not such designation indicates a preference of one transmission medium over another.
In the embodiment shown, the transmission media include an insulated or uninsulated wire 1302 and an insulated or uninsulated wire 1304 (referred to herein as wires 1302 and 1304 , respectively). The repeater device 1306 uses a receiver coupler 1308 to receive a guided wave traveling along wire 1302 and repeats the transmission using transmitter waveguide 1310 as a guided wave along wire 1304 . In other embodiments, repeater device 1306 can switch from the wire 1304 to the wire 1302 , or can repeat the transmissions along the same paths. Repeater device 1306 can include sensors, or be in communication with sensors (or a network management system 1601 depicted in FIG. 16A ) that indicate conditions that can affect the transmission. Based on the feedback received from the sensors, the repeater device 1306 can make the determination about whether to keep the transmission along the same wire, or transfer the transmission to the other wire.
Turning now to FIG. 14 , illustrated is a block diagram 1400 illustrating an example, non-limiting embodiment of a bidirectional repeater system. In particular, a bidirectional repeater system is presented for use in a transmission device, such as transmission device 101 or 102 presented in conjunction with FIG. 1 . The bidirectional repeater system includes waveguide coupling devices 1402 and 1404 that receive and transmit transmissions from other coupling devices located in a distributed antenna system or backhaul system.
In various embodiments, waveguide coupling device 1402 can receive a transmission from another waveguide coupling device, wherein the transmission has a plurality of subcarriers. Diplexer 1406 can separate the transmission from other transmissions, and direct the transmission to low-noise amplifier (“LNA”) 1408 . A frequency mixer 1428 , with help from a local oscillator 1412 , can downshift the transmission (which is in the millimeter-wave band or around 38 GHz in some embodiments) to a lower frequency, such as a cellular band (˜1.9 GHz) for a distributed antenna system, a native frequency, or other frequency for a backhaul system. An extractor (or demultiplexer) 1432 can extract the signal on a subcarrier and direct the signal to an output component 1422 for optional amplification, buffering or isolation by power amplifier 1424 for coupling to communications interface 205 . The communications interface 205 can further process the signals received from the power amplifier 1424 or otherwise transmit such signals over a wireless or wired interface to other devices such as a base station, mobile devices, a building, etc. For the signals that are not being extracted at this location, extractor 1432 can redirect them to another frequency mixer 1436 , where the signals are used to modulate a carrier wave generated by local oscillator 1414 . The carrier wave, with its subcarriers, is directed to a power amplifier (“PA”) 1416 and is retransmitted by waveguide coupling device 1404 to another system, via diplexer 1420 .
An LNA 1426 can be used to amplify, buffer or isolate signals that are received by the communication interface 205 and then send the signal to a multiplexer 1434 which merges the signal with signals that have been received from waveguide coupling device 1404 . The signals received from coupling device 1404 have been split by diplexer 1420 , and then passed through LNA 1418 , and downshifted in frequency by frequency mixer 1438 . When the signals are combined by multiplexer 1434 , they are upshifted in frequency by frequency mixer 1430 , and then boosted by PA 1410 , and transmitted to another system by waveguide coupling device 1402 . In an embodiment bidirectional repeater system can be merely a repeater without the output device 1422 . In this embodiment, the multiplexer 1434 would not be utilized and signals from LNA 1418 would be directed to mixer 1430 as previously described. It will be appreciated that in some embodiments, the bidirectional repeater system could also be implemented using two distinct and separate unidirectional repeaters. In an alternative embodiment, a bidirectional repeater system could also be a booster or otherwise perform retransmissions without downshifting and upshifting. Indeed in example embodiment, the retransmissions can be based upon receiving a signal or guided wave and performing some signal or guided wave processing or reshaping, filtering, and/or amplification, prior to retransmission of the signal or guided wave.
Referring now to FIG. 15 , a block diagram 1500 illustrating an example, non-limiting embodiment of a guided wave communications system is shown. This diagram depicts an exemplary environment in which a guided wave communication system, such as the guided wave communication system presented in conjunction with FIG. 1 , can be used.
To provide network connectivity to additional base station devices, a backhaul network that links the communication cells (e.g., macrocells and macrocells) to network devices of a core network correspondingly expands. Similarly, to provide network connectivity to a distributed antenna system, an extended communication system that links base station devices and their distributed antennas is desirable. A guided wave communication system 1500 such as shown in FIG. 15 can be provided to enable alternative, increased or additional network connectivity and a waveguide coupling system can be provided to transmit and/or receive guided wave (e.g., surface wave) communications on a transmission medium such as a wire that operates as a single-wire transmission line (e.g., a utility line), and that can be used as a waveguide and/or that otherwise operates to guide the transmission of an electromagnetic wave.
The guided wave communication system 1500 can comprise a first instance of a distribution system 1550 that includes one or more base station devices (e.g., base station device 1504 ) that are communicably coupled to a central office 1501 and/or a macrocell site 1502 . Base station device 1504 can be connected by a wired (e.g., fiber and/or cable), or by a wireless (e.g., microwave wireless) connection to the macrocell site 1502 and the central office 1501 . A second instance of the distribution system 1560 can be used to provide wireless voice and data services to mobile device 1522 and to residential and/or commercial establishments 1542 (herein referred to as establishments 1542 ). System 1500 can have additional instances of the distribution systems 1550 and 1560 for providing voice and/or data services to mobile devices 1522 - 1524 and establishments 1542 as shown in FIG. 15 .
Macrocells such as macrocell site 1502 can have dedicated connections to a mobile network and base station device 1504 or can share and/or otherwise use another connection. Central office 1501 can be used to distribute media content and/or provide internet service provider (ISP) services to mobile devices 1522 - 1524 and establishments 1542 . The central office 1501 can receive media content from a constellation of satellites 1530 (one of which is shown in FIG. 15 ) or other sources of content, and distribute such content to mobile devices 1522 - 1524 and establishments 1542 via the first and second instances of the distribution system 1550 and 1560 . The central office 1501 can also be communicatively coupled to the Internet 1503 for providing internet data services to mobile devices 1522 - 1524 and establishments 1542 .
Base station device 1504 can be mounted on, or attached to, utility pole 1516 . In other embodiments, base station device 1504 can be near transformers and/or other locations situated nearby a power line. Base station device 1504 can facilitate connectivity to a mobile network for mobile devices 1522 and 1524 . Antennas 1512 and 1514 , mounted on or near utility poles 1518 and 1520 , respectively, can receive signals from base station device 1504 and transmit those signals to mobile devices 1522 and 1524 over a much wider area than if the antennas 1512 and 1514 were located at or near base station device 1504 .
It is noted that FIG. 15 displays three utility poles, in each instance of the distribution systems 1550 and 1560 , with one base station device, for purposes of simplicity. In other embodiments, utility pole 1516 can have more base station devices, and more utility poles with distributed antennas and/or tethered connections to establishments 1542 .
A transmission device 1506 , such as transmission device 101 or 102 presented in conjunction with FIG. 1 , can transmit a signal from base station device 1504 to antennas 1512 and 1514 via utility or power line(s) that connect the utility poles 1516 , 1518 , and 1520 . To transmit the signal, radio source and/or transmission device 1506 upconverts the signal (e.g., via frequency mixing) from base station device 1504 or otherwise converts the signal from the base station device 1504 to a microwave band signal and the transmission device 1506 launches a microwave band wave that propagates as a guided wave traveling along the utility line or other wire as described in previous embodiments. At utility pole 1518 , another transmission device 1508 receives the guided wave (and optionally can amplify it as needed or desired or operate as a repeater to receive it and regenerate it) and sends it forward as a guided wave on the utility line or other wire. The transmission device 1508 can also extract a signal from the microwave band guided wave and shift it down in frequency or otherwise convert it to its original cellular band frequency (e.g., 1.9 GHz or other defined cellular frequency) or another cellular (or non-cellular) band frequency. An antenna 1512 can wireless transmit the downshifted signal to mobile device 1522 . The process can be repeated by transmission device 1510 , antenna 1514 and mobile device 1524 , as necessary or desirable.
Transmissions from mobile devices 1522 and 1524 can also be received by antennas 1512 and 1514 respectively. The transmission devices 1508 and 1510 can upshift or otherwise convert the cellular band signals to microwave band and transmit the signals as guided wave (e.g., surface wave or other electromagnetic wave) transmissions over the power line(s) to base station device 1504 .
Media content received by the central office 1501 can be supplied to the second instance of the distribution system 1560 via the base station device 1504 for distribution to mobile devices 1522 and establishments 1542 . The transmission device 1510 can be tethered to the establishments 1542 by one or more wired connections or a wireless interface. The one or more wired connections may include without limitation, a power line, a coaxial cable, a fiber cable, a twisted pair cable, a guided wave transmission medium or other suitable wired mediums for distribution of media content and/or for providing internet services. In an example embodiment, the wired connections from the transmission device 1510 can be communicatively coupled to one or more very high bit rate digital subscriber line (VDSL) modems located at one or more corresponding service area interfaces (SAIs—not shown) or pedestals, each SAI or pedestal providing services to a portion of the establishments 1542 . The VDSL modems can be used to selectively distribute media content and/or provide internet services to gateways (not shown) located in the establishments 1542 . The SAIs or pedestals can also be communicatively coupled to the establishments 1542 over a wired medium such as a power line, a coaxial cable, a fiber cable, a twisted pair cable, a guided wave transmission medium or other suitable wired mediums. In other example embodiments, the transmission device 1510 can be communicatively coupled directly to establishments 1542 without intermediate interfaces such as the SAIs or pedestals.
In another example embodiment, system 1500 can employ diversity paths, where two or more utility lines or other wires are strung between the utility poles 1516 , 1518 , and 1520 (e.g., for example, two or more wires between poles 1516 and 1520 ) and redundant transmissions from base station/macrocell site 1502 are transmitted as guided waves down the surface of the utility lines or other wires. The utility lines or other wires can be either insulated or uninsulated, and depending on the environmental conditions that cause transmission losses, the coupling devices can selectively receive signals from the insulated or uninsulated utility lines or other wires. The selection can be based on measurements of the signal-to-noise ratio of the wires, or based on determined weather/environmental conditions (e.g., moisture detectors, weather forecasts, etc.). The use of diversity paths with system 1500 can enable alternate routing capabilities, load balancing, increased load handling, concurrent bi-directional or synchronous communications, spread spectrum communications, etc.
It is noted that the use of the transmission devices 1506 , 1508 , and 1510 in FIG. 15 are by way of example only, and that in other embodiments, other uses are possible. For instance, transmission devices can be used in a backhaul communication system, providing network connectivity to base station devices. Transmission devices 1506 , 1508 , and 1510 can be used in many circumstances where it is desirable to transmit guided wave communications over a wire, whether insulated or not insulated. Transmission devices 1506 , 1508 , and 1510 are improvements over other coupling devices due to no contact or limited physical and/or electrical contact with the wires that may carry high voltages. The transmission device can be located away from the wire (e.g., spaced apart from the wire) and/or located on the wire so long as it is not electrically in contact with the wire, as the dielectric acts as an insulator, allowing for cheap, easy, and/or less complex installation. However, as previously noted conducting or non-dielectric couplers can be employed, for example in configurations where the wires correspond to a telephone network, cable television network, broadband data service, fiber optic communications system or other network employing low voltages or having insulated transmission lines.
It is further noted, that while base station device 1504 and macrocell site 1502 are illustrated in an embodiment, other network configurations are likewise possible. For example, devices such as access points or other wireless gateways can be employed in a similar fashion to extend the reach of other networks such as a wireless local area network, a wireless personal area network or other wireless network that operates in accordance with a communication protocol such as a 802.11 protocol, WIMAX protocol, UltraWideband protocol, Bluetooth protocol, Zigbee protocol or other wireless protocol.
Referring now to FIGS. 16A & 16B , block diagrams illustrating an example, non-limiting embodiment of a system for managing a power grid communication system are shown. Considering FIG. 16A , a waveguide system 1602 is presented for use in a guided wave communications system, such as the system presented in conjunction with FIG. 15 . The waveguide system 1602 can comprise sensors 1604 , a power management system 1605 , a transmission device 101 or 102 that includes at least one communication interface 205 , transceiver 210 and coupler 220 .
The waveguide system 1602 can be coupled to a power line 1610 for facilitating guided wave communications in accordance with embodiments described in the subject disclosure. In an example embodiment, the transmission device 101 or 102 includes coupler 220 for inducing electromagnetic waves on a surface of the power line 1610 that longitudinally propagate along the surface of the power line 1610 as described in the subject disclosure. The transmission device 101 or 102 can also serve as a repeater for retransmitting electromagnetic waves on the same power line 1610 or for routing electromagnetic waves between power lines 1610 as shown in FIGS. 12-13 .
The transmission device 101 or 102 includes transceiver 210 configured to, for example, up-convert a signal operating at an original frequency range to electromagnetic waves operating at, exhibiting, or associated with a carrier frequency that propagate along a coupler to induce corresponding guided electromagnetic waves that propagate along a surface of the power line 1610 . A carrier frequency can be represented by a center frequency having upper and lower cutoff frequencies that define the bandwidth of the electromagnetic waves. The power line 1610 can be a wire (e.g., single stranded or multi-stranded) having a conducting surface or insulated surface. The transceiver 210 can also receive signals from the coupler 220 and down-convert the electromagnetic waves operating at a carrier frequency to signals at their original frequency.
Signals received by the communications interface 205 of transmission device 101 or 102 for up-conversion can include without limitation signals supplied by a central office 1611 over a wired or wireless interface of the communications interface 205 , a base station 1614 over a wired or wireless interface of the communications interface 205 , wireless signals transmitted by mobile devices 1620 to the base station 1614 for delivery over the wired or wireless interface of the communications interface 205 , signals supplied by in-building communication devices 1618 over the wired or wireless interface of the communications interface 205 , and/or wireless signals supplied to the communications interface 205 by mobile devices 1612 roaming in a wireless communication range of the communications interface 205 . In embodiments where the waveguide system 1602 functions as a repeater, such as shown in FIGS. 12-13 , the communications interface 205 may or may not be included in the waveguide system 1602 .
The electromagnetic waves propagating along the surface of the power line 1610 can be modulated and formatted to include packets or frames of data that include a data payload and further include networking information (such as header information for identifying one or more destination waveguide systems 1602 ). The networking information may be provided by the waveguide system 1602 or an originating device such as the central office 1611 , the base station 1614 , mobile devices 1620 , or in-building devices 1618 , or a combination thereof. Additionally, the modulated electromagnetic waves can include error correction data for mitigating signal disturbances. The networking information and error correction data can be used by a destination waveguide system 1602 for detecting transmissions directed to it, and for down-converting and processing with error correction data transmissions that include voice and/or data signals directed to recipient communication devices communicatively coupled to the destination waveguide system 1602 .
Referring now to the sensors 1604 of the waveguide system 1602 , the sensors 1604 can comprise one or more of a temperature sensor 1604 a , a disturbance detection sensor 1604 b , a loss of energy sensor 1604 c , a noise sensor 1604 d , a vibration sensor 1604 e , an environmental (e.g., weather) sensor 1604 f , and/or an image sensor 1604 g . The temperature sensor 1604 a can be used to measure ambient temperature, a temperature of the transmission device 101 or 102 , a temperature of the power line 1610 , temperature differentials (e.g., compared to a setpoint or baseline, between transmission device 101 or 102 and 1610 , etc.), or any combination thereof. In one embodiment, temperature metrics can be collected and reported periodically to a network management system 1601 by way of the base station 1614 .
The disturbance detection sensor 1604 b can perform measurements on the power line 1610 to detect disturbances such as signal reflections, which may indicate a presence of a downstream disturbance that may impede the propagation of electromagnetic waves on the power line 1610 . A signal reflection can represent a distortion resulting from, for example, an electromagnetic wave transmitted on the power line 1610 by the transmission device 101 or 102 that reflects in whole or in part back to the transmission device 101 or 102 from a disturbance in the power line 1610 located downstream from the transmission device 101 or 102 .
Signal reflections can be caused by obstructions on the power line 1610 . For example, a tree limb may cause electromagnetic wave reflections when the tree limb is lying on the power line 1610 , or is in close proximity to the power line 1610 which may cause a corona discharge. Other obstructions that can cause electromagnetic wave reflections can include without limitation an object that has been entangled on the power line 1610 (e.g., clothing, a shoe wrapped around a power line 1610 with a shoe string, etc.), a corroded build-up on the power line 1610 or an ice build-up. Power grid components may also impede or obstruct with the propagation of electromagnetic waves on the surface of power lines 1610 . Illustrations of power grid components that may cause signal reflections include without limitation a transformer and a joint for connecting spliced power lines. A sharp angle on the power line 1610 may also cause electromagnetic wave reflections.
The disturbance detection sensor 1604 b can comprise a circuit to compare magnitudes of electromagnetic wave reflections to magnitudes of original electromagnetic waves transmitted by the transmission device 101 or 102 to determine how much a downstream disturbance in the power line 1610 attenuates transmissions. The disturbance detection sensor 1604 b can further comprise a spectral analyzer circuit for performing spectral analysis on the reflected waves. The spectral data generated by the spectral analyzer circuit can be compared with spectral profiles via pattern recognition, an expert system, curve fitting, matched filtering or other artificial intelligence, classification or comparison technique to identify a type of disturbance based on, for example, the spectral profile that most closely matches the spectral data. The spectral profiles can be stored in a memory of the disturbance detection sensor 1604 b or may be remotely accessible by the disturbance detection sensor 1604 b . The profiles can comprise spectral data that models different disturbances that may be encountered on power lines 1610 to enable the disturbance detection sensor 1604 b to identify disturbances locally. An identification of the disturbance if known can be reported to the network management system 1601 by way of the base station 1614 . The disturbance detection sensor 1604 b can also utilize the transmission device 101 or 102 to transmit electromagnetic waves as test signals to determine a roundtrip time for an electromagnetic wave reflection. The round trip time measured by the disturbance detection sensor 1604 b can be used to calculate a distance traveled by the electromagnetic wave up to a point where the reflection takes place, which enables the disturbance detection sensor 1604 b to calculate a distance from the transmission device 101 or 102 to the downstream disturbance on the power line 1610 .
The distance calculated can be reported to the network management system 1601 by way of the base station 1614 . In one embodiment, the location of the waveguide system 1602 on the power line 1610 may be known to the network management system 1601 , which the network management system 1601 can use to determine a location of the disturbance on the power line 1610 based on a known topology of the power grid. In another embodiment, the waveguide system 1602 can provide its location to the network management system 1601 to assist in the determination of the location of the disturbance on the power line 1610 . The location of the waveguide system 1602 can be obtained by the waveguide system 1602 from a pre-programmed location of the waveguide system 1602 stored in a memory of the waveguide system 1602 , or the waveguide system 1602 can determine its location using a GPS receiver (not shown) included in the waveguide system 1602 .
The power management system 1605 provides energy to the aforementioned components of the waveguide system 1602 . The power management system 1605 can receive energy from solar cells, or from a transformer (not shown) coupled to the power line 1610 , or by inductive coupling to the power line 1610 or another nearby power line. The power management system 1605 can also include a backup battery and/or a super capacitor or other capacitor circuit for providing the waveguide system 1602 with temporary power. The loss of energy sensor 1604 c can be used to detect when the waveguide system 1602 has a loss of power condition and/or the occurrence of some other malfunction. For example, the loss of energy sensor 1604 c can detect when there is a loss of power due to defective solar cells, an obstruction on the solar cells that causes them to malfunction, loss of power on the power line 1610 , and/or when the backup power system malfunctions due to expiration of a backup battery, or a detectable defect in a super capacitor. When a malfunction and/or loss of power occurs, the loss of energy sensor 1604 c can notify the network management system 1601 by way of the base station 1614 .
The noise sensor 1604 d can be used to measure noise on the power line 1610 that may adversely affect transmission of electromagnetic waves on the power line 1610 . The noise sensor 1604 d can sense unexpected electromagnetic interference, noise bursts, or other sources of disturbances that may interrupt reception of modulated electromagnetic waves on a surface of a power line 1610 . A noise burst can be caused by, for example, a corona discharge, or other source of noise. The noise sensor 1604 d can compare the measured noise to a noise profile obtained by the waveguide system 1602 from an internal database of noise profiles or from a remotely located database that stores noise profiles via pattern recognition, an expert system, curve fitting, matched filtering or other artificial intelligence, classification or comparison technique. From the comparison, the noise sensor 1604 d may identify a noise source (e.g., corona discharge or otherwise) based on, for example, the noise profile that provides the closest match to the measured noise. The noise sensor 1604 d can also detect how noise affects transmissions by measuring transmission metrics such as bit error rate, packet loss rate, jitter, packet retransmission requests, etc. The noise sensor 1604 d can report to the network management system 1601 by way of the base station 1614 the identity of noise sources, their time of occurrence, and transmission metrics, among other things.
The vibration sensor 1604 e can include accelerometers and/or gyroscopes to detect 2D or 3D vibrations on the power line 1610 . The vibrations can be compared to vibration profiles that can be stored locally in the waveguide system 1602 , or obtained by the waveguide system 1602 from a remote database via pattern recognition, an expert system, curve fitting, matched filtering or other artificial intelligence, classification or comparison technique. Vibration profiles can be used, for example, to distinguish fallen trees from wind gusts based on, for example, the vibration profile that provides the closest match to the measured vibrations. The results of this analysis can be reported by the vibration sensor 1604 e to the network management system 1601 by way of the base station 1614 .
The environmental sensor 1604 f can include a barometer for measuring atmospheric pressure, ambient temperature (which can be provided by the temperature sensor 1604 a ), wind speed, humidity, wind direction, and rainfall, among other things. The environmental sensor 1604 f can collect raw information and process this information by comparing it to environmental profiles that can be obtained from a memory of the waveguide system 1602 or a remote database to predict weather conditions before they arise via pattern recognition, an expert system, knowledge-based system or other artificial intelligence, classification or other weather modeling and prediction technique. The environmental sensor 1604 f can report raw data as well as its analysis to the network management system 1601 .
The image sensor 1604 g can be a digital camera (e.g., a charged coupled device or CCD imager, infrared camera, etc.) for capturing images in a vicinity of the waveguide system 1602 . The image sensor 1604 g can include an electromechanical mechanism to control movement (e.g., actual position or focal points/zooms) of the camera for inspecting the power line 1610 from multiple perspectives (e.g., top surface, bottom surface, left surface, right surface and so on). Alternatively, the image sensor 1604 g can be designed such that no electromechanical mechanism is needed in order to obtain the multiple perspectives. The collection and retrieval of imaging data generated by the image sensor 1604 g can be controlled by the network management system 1601 , or can be autonomously collected and reported by the image sensor 1604 g to the network management system 1601 .
Other sensors that may be suitable for collecting telemetry information associated with the waveguide system 1602 and/or the power lines 1610 for purposes of detecting, predicting and/or mitigating disturbances that can impede the propagation of electromagnetic wave transmissions on power lines 1610 (or any other form of a transmission medium of electromagnetic waves) may be utilized by the waveguide system 1602 .
Referring now to FIG. 16B , block diagram 1650 illustrates an example, non-limiting embodiment of a system for managing a power grid 1653 and a communication system 1655 embedded therein or associated therewith in accordance with various aspects described herein. The communication system 1655 comprises a plurality of waveguide systems 1602 coupled to power lines 1610 of the power grid 1653 . At least a portion of the waveguide systems 1602 used in the communication system 1655 can be in direct communication with a base station 1614 and/or the network management system 1601 . Waveguide systems 1602 not directly connected to a base station 1614 or the network management system 1601 can engage in communication sessions with either a base station 1614 or the network management system 1601 by way of other downstream waveguide systems 1602 connected to a base station 1614 or the network management system 1601 .
The network management system 1601 can be communicatively coupled to equipment of a utility company 1652 and equipment of a communications service provider 1654 for providing each entity, status information associated with the power grid 1653 and the communication system 1655 , respectively. The network management system 1601 , the equipment of the utility company 1652 , and the communications service provider 1654 can access communication devices utilized by utility company personnel 1656 and/or communication devices utilized by communications service provider personnel 1658 for purposes of providing status information and/or for directing such personnel in the management of the power grid 1653 and/or communication system 1655 .
FIG. 17A illustrates a flow diagram of an example, non-limiting embodiment of a method 1700 for detecting and mitigating disturbances occurring in a communication network of the systems of FIGS. 16A & 16B . Method 1700 can begin with step 1702 where a waveguide system 1602 transmits and receives messages embedded in, or forming part of, modulated electromagnetic waves or another type of electromagnetic waves traveling along a surface of a power line 1610 . The messages can be voice messages, streaming video, and/or other data/information exchanged between communication devices communicatively coupled to the communication system 1655 . At step 1704 the sensors 1604 of the waveguide system 1602 can collect sensing data. In an embodiment, the sensing data can be collected in step 1704 prior to, during, or after the transmission and/or receipt of messages in step 1702 . At step 1706 the waveguide system 1602 (or the sensors 1604 themselves) can determine from the sensing data an actual or predicted occurrence of a disturbance in the communication system 1655 that can affect communications originating from (e.g., transmitted by) or received by the waveguide system 1602 . The waveguide system 1602 (or the sensors 1604 ) can process temperature data, signal reflection data, loss of energy data, noise data, vibration data, environmental data, or any combination thereof to make this determination. The waveguide system 1602 (or the sensors 1604 ) may also detect, identify, estimate, or predict the source of the disturbance and/or its location in the communication system 1655 . If a disturbance is neither detected/identified nor predicted/estimated at step 1708 , the waveguide system 1602 can proceed to step 1702 where it continues to transmit and receive messages embedded in, or forming part of, modulated electromagnetic waves traveling along a surface of the power line 1610 .
If at step 1708 a disturbance is detected/identified or predicted/estimated to occur, the waveguide system 1602 proceeds to step 1710 to determine if the disturbance adversely affects (or alternatively, is likely to adversely affect or the extent to which it may adversely affect) transmission or reception of messages in the communication system 1655 . In one embodiment, a duration threshold and a frequency of occurrence threshold can be used at step 1710 to determine when a disturbance adversely affects communications in the communication system 1655 . For illustration purposes only, assume a duration threshold is set to 500 ms, while a frequency of occurrence threshold is set to 5 disturbances occurring in an observation period of 10 sec. Thus, a disturbance having a duration greater than 500 ms will trigger the duration threshold. Additionally, any disturbance occurring more than 5 times in a 10 sec time interval will trigger the frequency of occurrence threshold.
In one embodiment, a disturbance may be considered to adversely affect signal integrity in the communication systems 1655 when the duration threshold alone is exceeded. In another embodiment, a disturbance may be considered as adversely affecting signal integrity in the communication systems 1655 when both the duration threshold and the frequency of occurrence threshold are exceeded. The latter embodiment is thus more conservative than the former embodiment for classifying disturbances that adversely affect signal integrity in the communication system 1655 . It will be appreciated that many other algorithms and associated parameters and thresholds can be utilized for step 1710 in accordance with example embodiments.
Referring back to method 1700 , if at step 1710 the disturbance detected at step 1708 does not meet the condition for adversely affected communications (e.g., neither exceeds the duration threshold nor the frequency of occurrence threshold), the waveguide system 1602 may proceed to step 1702 and continue processing messages. For instance, if the disturbance detected in step 1708 has a duration of 1 msec with a single occurrence in a 10 sec time period, then neither threshold will be exceeded. Consequently, such a disturbance may be considered as having a nominal effect on signal integrity in the communication system 1655 and thus would not be flagged as a disturbance requiring mitigation. Although not flagged, the occurrence of the disturbance, its time of occurrence, its frequency of occurrence, spectral data, and/or other useful information, may be reported to the network management system 1601 as telemetry data for monitoring purposes.
Referring back to step 1710 , if on the other hand the disturbance satisfies the condition for adversely affected communications (e.g., exceeds either or both thresholds), the waveguide system 1602 can proceed to step 1712 and report the incident to the network management system 1601 . The report can include raw sensing data collected by the sensors 1604 , a description of the disturbance if known by the waveguide system 1602 , a time of occurrence of the disturbance, a frequency of occurrence of the disturbance, a location associated with the disturbance, parameters readings such as bit error rate, packet loss rate, retransmission requests, jitter, latency and so on. If the disturbance is based on a prediction by one or more sensors of the waveguide system 1602 , the report can include a type of disturbance expected, and if predictable, an expected time occurrence of the disturbance, and an expected frequency of occurrence of the predicted disturbance when the prediction is based on historical sensing data collected by the sensors 1604 of the waveguide system 1602 .
At step 1714 , the network management system 1601 can determine a mitigation, circumvention, or correction technique, which may include directing the waveguide system 1602 to reroute traffic to circumvent the disturbance if the location of the disturbance can be determined. In one embodiment, the waveguide coupling device 1402 detecting the disturbance may direct a repeater such as the one shown in FIGS. 13-14 to connect the waveguide system 1602 from a primary power line affected by the disturbance to a secondary power line to enable the waveguide system 1602 to reroute traffic to a different transmission medium and avoid the disturbance. In an embodiment where the waveguide system 1602 is configured as a repeater the waveguide system 1602 can itself perform the rerouting of traffic from the primary power line to the secondary power line. It is further noted that for bidirectional communications (e.g., full or half-duplex communications), the repeater can be configured to reroute traffic from the secondary power line back to the primary power line for processing by the waveguide system 1602 .
In another embodiment, the waveguide system 1602 can redirect traffic by instructing a first repeater situated upstream of the disturbance and a second repeater situated downstream of the disturbance to redirect traffic from a primary power line temporarily to a secondary power line and back to the primary power line in a manner that avoids the disturbance. It is further noted that for bidirectional communications (e.g., full or half-duplex communications), repeaters can be configured to reroute traffic from the secondary power line back to the primary power line.
To avoid interrupting existing communication sessions occurring on a secondary power line, the network management system 1601 may direct the waveguide system 1602 to instruct repeater(s) to utilize unused time slot(s) and/or frequency band(s) of the secondary power line for redirecting data and/or voice traffic away from the primary power line to circumvent the disturbance.
At step 1716 , while traffic is being rerouted to avoid the disturbance, the network management system 1601 can notify equipment of the utility company 1652 and/or equipment of the communications service provider 1654 , which in turn may notify personnel of the utility company 1656 and/or personnel of the communications service provider 1658 of the detected disturbance and its location if known. Field personnel from either party can attend to resolving the disturbance at a determined location of the disturbance. Once the disturbance is removed or otherwise mitigated by personnel of the utility company and/or personnel of the communications service provider, such personnel can notify their respective companies and/or the network management system 1601 utilizing field equipment (e.g., a laptop computer, smartphone, etc.) communicatively coupled to network management system 1601 , and/or equipment of the utility company and/or the communications service provider. The notification can include a description of how the disturbance was mitigated and any changes to the power lines 1610 that may change a topology of the communication system 1655 .
Once the disturbance has been resolved (as determined in decision 1718 ), the network management system 1601 can direct the waveguide system 1602 at step 1720 to restore the previous routing configuration used by the waveguide system 1602 or route traffic according to a new routing configuration if the restoration strategy used to mitigate the disturbance resulted in a new network topology of the communication system 1655 . In another embodiment, the waveguide system 1602 can be configured to monitor mitigation of the disturbance by transmitting test signals on the power line 1610 to determine when the disturbance has been removed. Once the waveguide system 1602 detects an absence of the disturbance it can autonomously restore its routing configuration without assistance by the network management system 1601 if it determines the network topology of the communication system 1655 has not changed, or it can utilize a new routing configuration that adapts to a detected new network topology.
FIG. 17B illustrates a flow diagram of an example, non-limiting embodiment of a method 1750 for detecting and mitigating disturbances occurring in a communication network of the system of FIGS. 16A and 16B . In one embodiment, method 1750 can begin with step 1752 where a network management system 1601 receives from equipment of the utility company 1652 or equipment of the communications service provider 1654 maintenance information associated with a maintenance schedule. The network management system 1601 can at step 1754 identify from the maintenance information, maintenance activities to be performed during the maintenance schedule. From these activities, the network management system 1601 can detect a disturbance resulting from the maintenance (e.g., scheduled replacement of a power line 1610 , scheduled replacement of a waveguide system 1602 on the power line 1610 , scheduled reconfiguration of power lines 1610 in the power grid 1653 , etc.).
In another embodiment, the network management system 1601 can receive at step 1755 telemetry information from one or more waveguide systems 1602 . The telemetry information can include among other things an identity of each waveguide system 1602 submitting the telemetry information, measurements taken by sensors 1604 of each waveguide system 1602 , information relating to predicted, estimated, or actual disturbances detected by the sensors 1604 of each waveguide system 1602 , location information associated with each waveguide system 1602 , an estimated location of a detected disturbance, an identification of the disturbance, and so on. The network management system 1601 can determine from the telemetry information a type of disturbance that may be adverse to operations of the waveguide, transmission of the electromagnetic waves along the wire surface, or both. The network management system 1601 can also use telemetry information from multiple waveguide systems 1602 to isolate and identify the disturbance. Additionally, the network management system 1601 can request telemetry information from waveguide systems 1602 in a vicinity of an affected waveguide system 1602 to triangulate a location of the disturbance and/or validate an identification of the disturbance by receiving similar telemetry information from other waveguide systems 1602 .
In yet another embodiment, the network management system 1601 can receive at step 1756 an unscheduled activity report from maintenance field personnel. Unscheduled maintenance may occur as result of field calls that are unplanned or as a result of unexpected field issues discovered during field calls or scheduled maintenance activities. The activity report can identify changes to a topology configuration of the power grid 1653 resulting from field personnel addressing discovered issues in the communication system 1655 and/or power grid 1653 , changes to one or more waveguide systems 1602 (such as replacement or repair thereof), mitigation of disturbances performed if any, and so on.
At step 1758 , the network management system 1601 can determine from reports received according to steps 1752 through 1756 if a disturbance will occur based on a maintenance schedule, or if a disturbance has occurred or is predicted to occur based on telemetry data, or if a disturbance has occurred due to an unplanned maintenance identified in a field activity report. From any of these reports, the network management system 1601 can determine whether a detected or predicted disturbance requires rerouting of traffic by the affected waveguide systems 1602 or other waveguide systems 1602 of the communication system 1655 .
When a disturbance is detected or predicted at step 1758 , the network management system 1601 can proceed to step 1760 where it can direct one or more waveguide systems 1602 to reroute traffic to circumvent the disturbance. When the disturbance is permanent due to a permanent topology change of the power grid 1653 , the network management system 1601 can proceed to step 1770 and skip steps 1762 , 1764 , 1766 , and 1772 . At step 1770 , the network management system 1601 can direct one or more waveguide systems 1602 to use a new routing configuration that adapts to the new topology. However, when the disturbance has been detected from telemetry information supplied by one or more waveguide systems 1602 , the network management system 1601 can notify maintenance personnel of the utility company 1656 or the communications service provider 1658 of a location of the disturbance, a type of disturbance if known, and related information that may be helpful to such personnel to mitigate the disturbance. When a disturbance is expected due to maintenance activities, the network management system 1601 can direct one or more waveguide systems 1602 to reconfigure traffic routes at a given schedule (consistent with the maintenance schedule) to avoid disturbances caused by the maintenance activities during the maintenance schedule.
Returning back to step 1760 and upon its completion, the process can continue with step 1762 . At step 1762 , the network management system 1601 can monitor when the disturbance(s) have been mitigated by field personnel. Mitigation of a disturbance can be detected at step 1762 by analyzing field reports submitted to the network management system 1601 by field personnel over a communications network (e.g., cellular communication system) utilizing field equipment (e.g., a laptop computer or handheld computer/device). If field personnel have reported that a disturbance has been mitigated, the network management system 1601 can proceed to step 1764 to determine from the field report whether a topology change was required to mitigate the disturbance. A topology change can include rerouting a power line 1610 , reconfiguring a waveguide system 1602 to utilize a different power line 1610 , otherwise utilizing an alternative link to bypass the disturbance and so on. If a topology change has taken place, the network management system 1601 can direct at step 1770 one or more waveguide systems 1602 to use a new routing configuration that adapts to the new topology.
If, however, a topology change has not been reported by field personnel, the network management system 1601 can proceed to step 1766 where it can direct one or more waveguide systems 1602 to send test signals to test a routing configuration that had been used prior to the detected disturbance(s). Test signals can be sent to affected waveguide systems 1602 in a vicinity of the disturbance. The test signals can be used to determine if signal disturbances (e.g., electromagnetic wave reflections) are detected by any of the waveguide systems 1602 . If the test signals confirm that a prior routing configuration is no longer subject to previously detected disturbance(s), then the network management system 1601 can at step 1772 direct the affected waveguide systems 1602 to restore a previous routing configuration. If, however, test signals analyzed by one or more waveguide coupling device 1402 and reported to the network management system 1601 indicate that the disturbance(s) or new disturbance(s) are present, then the network management system 1601 will proceed to step 1768 and report this information to field personnel to further address field issues. The network management system 1601 can in this situation continue to monitor mitigation of the disturbance(s) at step 1762 .
In the aforementioned embodiments, the waveguide systems 1602 can be configured to be self-adapting to changes in the power grid 1653 and/or to mitigation of disturbances. That is, one or more affected waveguide systems 1602 can be configured to self-monitor mitigation of disturbances and reconfigure traffic routes without requiring instructions to be sent to them by the network management system 1601 . In this embodiment, the one or more waveguide systems 1602 that are self-configurable can inform the network management system 1601 of its routing choices so that the network management system 1601 can maintain a macro-level view of the communication topology of the communication system 1655 .
While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIGS. 17A and 17B , respectively, it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Moreover, not all illustrated blocks may be required to implement the methods described herein.
FIGS. 18A, 18B, 18C, 18D, 18E, 18F and 18G are block diagrams illustrating example, non-limiting embodiments of a waveguide device for transmitting and/or receiving electromagnetic waves in accordance with various aspects described herein. In one or more embodiments, the waveguide device can be separable or otherwise configured to facilitate a physical connection with a transmission medium, such as a power line. As an example, the waveguide device can be selectively separable into portions (of the same or different sizes) so that the portions (any number of) can be joined or moved back together and clamped onto or otherwise physically connected with the transmission medium. Various components and/or techniques can be utilized for separating and rejoining portions of the waveguide device such as hinges, latching mechanisms, and so forth. The method of opening, closing or actuating the latching mechanism can vary including via a magnetic field, a servo-motor, a pushrod, and so forth. In one or more embodiments, the waveguide device can be self-closing, such as automatically actuating a latching mechanism of the waveguide device to physically connect with the transmission medium when in proximity to the transmission medium. In one or more embodiments, the latching mechanism can open or close responsive to a latching signal generated by the waveguide system or generated by another device, such as an unmanned aircraft utilized to deliver the waveguide device as described herein. In one or more embodiments, a hydraulic actuator can be utilized for opening and closing of the latching mechanism. In another embodiment, a biasing mechanism can be biased towards a closed position to close the latching mechanism, such as a spring-loaded latch.
In an embodiment, FIG. 18A illustrates a front view of a waveguide device 1865 having a plurality of slots 1863 (e.g., openings or apertures) for emitting electromagnetic waves having radiated electric fields (e-fields) 1861 . In an embodiment, the radiated e-fields 1861 of pairs of symmetrically positioned slots 1863 (e.g., north and south slots of the waveguide 1865 ) can be directed away from each other (i.e., polar opposite radial orientations about the cable 1862 ). While the slots 1863 are shown as having a rectangular shape, other shapes such as other polygons, sector and arc shapes, ellipsoid shapes and other shapes are likewise possible. For illustration purposes only, the term north will refer to a relative direction as shown in the figures. All references in the subject disclosure to other directions (e.g., south, east, west, northwest, and so forth) will be relative to a northern illustration. In an embodiment, to achieve e-fields with opposing orientations at the north and south slots 1863 , for example, the north and south slots 1863 can be arranged to have a circumferential distance between each other that is approximately one wavelength of electromagnetic waves signals supplied to these slots. The waveguide 1865 can have a cylindrical cavity in a center of the waveguide 1865 to enable placement of a cable 1862 . In one embodiment, the cable 1862 can comprise an insulated conductor. In another embodiment, the cable 1862 can comprise an uninsulated conductor. In yet other embodiments, the cable 1862 can comprise any of the embodiments of a transmission core 1852 of cable 1850 previously described.
In one embodiment, the cable 1862 can slide into the cylindrical cavity of the waveguide 1865 . In another embodiment, the waveguide 1865 can utilize an assembly mechanism (not shown). The assembly mechanism (e.g., a hinge or other suitable mechanisms that provide a way to open the waveguide 1865 at one or more locations) can be used to enable placement of the waveguide 1865 on an outer surface of the cable 1862 or otherwise to assemble separate pieces together to form the waveguide 1865 as shown. According to these and other suitable embodiments, the waveguide 1865 can be configured to wrap around the cable 1862 like a collar.
FIG. 18B illustrates a side view of an embodiment of the waveguide 1865 . The waveguide 1865 can be adapted to have a hollow rectangular waveguide portion 1867 that receives electromagnetic waves 1866 generated by a transmitter circuit as previously described in the subject disclosure (e.g., see reference 101 , 1000 of FIGS. 1 and 10 A). The electromagnetic waves 1866 can be distributed by the hollow rectangular waveguide portion 1867 into in a hollow collar 1869 of the waveguide 1865 . The rectangular waveguide portion 1867 and the hollow collar 1869 can be constructed of materials suitable for maintaining the electromagnetic waves within the hollow chambers of these assemblies (e.g., carbon fiber materials). It should be noted that while the waveguide portion 1867 is shown and described in a hollow rectangular configuration, other shapes and/or other non-hollow configurations can be employed. In particular, the waveguide portion 1867 can have a square or other polygonal cross section, an arc or sector cross section that is truncated to conform to the outer surface of the cable 1862 , a circular or ellipsoid cross section or cross sectional shape. In addition, the waveguide portion 1867 can be configured as, or otherwise include, a solid dielectric material.
As previously described, the hollow collar 1869 can be configured to emit electromagnetic waves from each slot 1863 with opposite e-fields 1861 at pairs of symmetrically positioned slots 1863 and 1863 ′. In an embodiment, the electromagnetic waves emitted by the combination of slots 1863 and 1863 ′ can in turn induce electromagnetic waves 1868 that are bound to the cable 1862 for propagation according to a fundamental wave mode without other wave modes present—such as non-fundamental wave modes. In this configuration, the electromagnetic waves 1868 can propagate longitudinally along the cable 1862 to other downstream waveguide systems coupled to the cable 1862 .
It should be noted that since the hollow rectangular waveguide portion 1867 of FIG. 18B is closer to slot 1863 (at the northern position of the waveguide 1865 ), slot 1863 can emit electromagnetic waves having a stronger magnitude than electromagnetic waves emitted by slot 1863 ′ (at the southern position). To reduce magnitude differences between these slots, slot 1863 ′ can be made larger than slot 1863 . The technique of utilizing different slot sizes to balance signal magnitudes between slots can be applied to any of the embodiments of the subject disclosure relating to FIGS. 18A, 18B, 18D, 18F, 18H and 18I —some of which are described below.
In another embodiment, FIG. 18C depicts a waveguide 1865 ′ that can be configured to utilize circuitry such as monolithic microwave integrated circuits (MMICs) 1870 each coupled to a signal input 1872 (e.g., coaxial cable that provides a communication signal). The signal input 1872 can be generated by a transmitter circuit as previously described in the subject disclosure (e.g., see reference 101 , 1000 of FIGS. 1 and 10A ) adapted to provide electrical signals to the MMICs 1870 . Each MMIC 1870 can be configured to receive signal 1872 which the MMIC 1870 can modulate and transmit with a radiating element (e.g., an antenna) to emit electromagnetic waves having radiated e-fields 1861 . In one embodiment, the MMICs 1870 can be configured to receive the same signal 1872 , but transmit electromagnetic waves having e-fields 1861 of opposing orientation. This can be accomplished by configuring one of the MMICs 1870 to transmit electromagnetic waves that are 180 degrees out of phase with the electromagnetic waves transmitted by the other MMIC 1870 . In an embodiment, the combination of the electromagnetic waves emitted by the MMICs 1870 can together induce electromagnetic waves 1868 that are bound to the cable 1862 for propagation according to a fundamental wave mode without other wave modes present—such as non-fundamental wave modes. In this configuration, the electromagnetic waves 1868 can propagate longitudinally along the cable 1862 to other downstream waveguide systems coupled to the cable 1862 .
A tapered horn 1880 can be added to the embodiments of FIGS. 18B and 18C to assist in the inducement of the electromagnetic waves 1868 on cable 1862 as depicted in FIGS. 18D and 18E . In an embodiment where the cable 1862 is an uninsulated conductor, the electromagnetic waves induced on the cable 1862 can have a large radial dimension (e.g., 1 meter). To enable use of a smaller tapered horn 1880 , an insulation layer 1879 can be applied on a portion of the cable 1862 at or near the cavity as depicted with hash lines in FIGS. 18D and 18E . The insulation layer 1879 can have a tapered end facing away from the waveguide 1865 . The added insulation enables the electromagnetic waves 1868 initially launched by the waveguide 1865 (or 1865 ′) to be tightly bound to the insulation, which in turn reduces the radial dimension of the electromagnetic fields 1868 (e.g., centimeters). As the electromagnetic waves 1868 propagate away from the waveguide 1865 ( 1865 ′) and reach the tapered end of the insulation layer 1879 , the radial dimension of the electromagnetic waves 1868 begin to increase eventually achieving the radial dimension they would have had had the electromagnetic waves 1868 been induced on the uninsulated conductor without an insulation layer. In the illustration of FIGS. 18D and 18 E the tapered end begins at an end of the tapered horn 1880 . In other embodiments, the tapered end of the insulation layer 1879 can begin before or after the end of the tapered horn 1880 . The tapered horn can be metallic or constructed of other conductive material or constructed of a plastic or other non-conductive materials that are coated or clad with a dielectric layer or doped with a conductive material to provide reflective properties similar to a metallic horn.
In an embodiment, cable 1862 can comprise any of the embodiments of cable 1850 described earlier. In this embodiment, waveguides 1865 and 1865 ′ can be coupled to a transmission core 1852 of cable 1850 as depicted in FIGS. 18F and 18G . The waveguides 1865 and 1865 ′ can induce, as previously described, electromagnetic waves 1868 on the transmission core 1852 for propagation entirely or partially within inner layers of cable 1850 .
It is noted that for the foregoing embodiments of FIGS. 18D, 18E, 18F and 18G , electromagnetic waves 1868 can be bidirectional. For example, electromagnetic waves 1868 of a different operating frequency can be received by slots 1863 or MMICs 1870 of the waveguides 1865 and 1865 ′, respectively. Once received, the electromagnetic waves can be converted by a receiver circuit (e.g., see reference 101 , 1000 of FIGS. 1 and 10A ) for generating a communication signal for processing.
Although not shown, it is further noted that the waveguides 1865 and 1865 ′ can be adapted so that the waveguides 1865 and 1865 ′ can direct electromagnetic waves 1868 upstream or downstream longitudinally. For example, a first tapered horn 1880 coupled to a first instance of a waveguide 1865 or 1865 ′ can be directed westerly on cable 1862 , while a second tapered horn 1880 coupled to a second instance of a waveguide 1865 or 1865 ′ can be directed easterly on cable 1862 . The first and second instances of the waveguides 1865 or 1865 ′ can be coupled so that in a repeater configuration, signals received by the first waveguide 1865 or 1865 ′ can be provided to the second waveguide 1865 or 1865 ′ for retransmission in an easterly direction on cable 1862 . The repeater configuration just described can also be applied from an easterly to westerly direction on cable 1862 .
The waveguide 1865 of FIGS. 18A, 18B, 18D and 18F can also be configured to generate electromagnetic fields having only non-fundamental or asymmetric wave modes. FIG. 18H depicts an embodiment of a waveguide 1865 that can be adapted to generate electromagnetic fields having only non-fundamental wave modes. A median line 1890 represents a separation between slots where electrical currents on a backside (not shown) of a frontal plate of the waveguide 1865 change polarity. For example, electrical currents on the backside of the frontal plate corresponding to e-fields that are radially outward (i.e., point away from a center point of cable 1862 ) can in some embodiments be associated with slots located outside of the median line 1890 (e.g., slots 1863 A and 1863 B). Electrical currents on the backside of the frontal plate corresponding to e-fields that are radially inward (i.e., point towards a center point of cable 1862 ) can in some embodiments be associated with slots located inside of the median line 1890 . The direction of the currents can depend on the operating frequency of the electromagnetic waves 1866 supplied to the hollow rectangular waveguide portion 1867 (see FIG. 18B ) among other parameters.
For illustration purposes, assume the electromagnetic waves 1866 supplied to the hollow rectangular waveguide portion 1867 have an operating frequency whereby a circumferential distance between slots 1863 A and 1863 B is one full wavelength of the electromagnetic waves 1866 . In this instance, the e-fields of the electromagnetic waves emitted by slots 1863 A and 1863 B point radially outward (i.e., have opposing orientations). When the electromagnetic waves emitted by slots 1863 A and 1863 B are combined, the resulting electromagnetic waves on cable 1862 will propagate according to the fundamental wave mode. In contrast, by repositioning one of the slots (e.g., slot 1863 B) inside the media line 1890 (i.e., slot 1863 C), slot 1863 C will generate electromagnetic waves that have e-fields that are approximately 180 degrees out of phase with the e-fields of the electromagnetic waves generated by slot 1863 A. Consequently, the e-field orientations of the electromagnetic waves generated by slot pairs 1863 A and 1863 C will be substantially aligned. The combination of the electromagnetic waves emitted by slot pairs 1863 A and 1863 C will thus generate electromagnetic waves that are bound to the cable 1862 for propagation according to a non-fundamental wave mode.
To achieve a reconfigurable slot arrangement, waveguide 1865 can be adapted according to the embodiments depicted in FIG. 18I . Configuration (A) depicts a waveguide 1865 having a plurality of symmetrically positioned slots. Each of the slots 1863 of configuration (A) can be selectively disabled by blocking the slot with a material (e.g., carbon fiber or metal) to prevent the emission of electromagnetic waves. A blocked (or disabled) slot 1863 is shown in black, while an enabled (or unblocked) slot 1863 is shown in white. Although not shown, a blocking material can be placed behind (or in front) of the frontal plate of the waveguide 1865 . A mechanism (not shown) can be coupled to the blocking material so that the blocking material can slide in or out of a particular slot 1863 much like closing or opening a window with a cover. The mechanism can be coupled to a linear motor controllable by circuitry of the waveguide 1865 to selectively enable or disable individual slots 1863 . With such a mechanism at each slot 1863 , the waveguide 1865 can be configured to select different configurations of enabled and disabled slots 1863 as depicted in the embodiments of FIG. 18I . Other methods or techniques for covering or opening slots (e.g., utilizing rotatable disks behind or in front of the waveguide 1865 ) can be applied to the embodiments of the subject disclosure.
In one embodiment, the waveguide system 1865 can be configured to enable certain slots 1863 outside the median line 1890 and disable certain slots 1863 inside the median line 1890 as shown in configuration (B) to generate fundamental waves. Assume, for example, that the circumferential distance between slots 1863 outside the median line 1890 (i.e., in the northern and southern locations of the waveguide system 1865 ) is one full wavelength. These slots will therefore have electric fields (e-fields) pointing at certain instances in time radially outward as previously described. In contrast, the slots inside the median line 1890 (i.e., in the western and eastern locations of the waveguide system 1865 ) will have a circumferential distance of one-half a wavelength relative to either of the slots 1863 outside the median line. Since the slots inside the median line 1890 are half a wavelength apart, such slots will produce electromagnetic waves having e-fields pointing radially outward. If the western and eastern slots 1863 outside the median line 1890 had been enabled instead of the western and eastern slots inside the median line 1890 , then the e-fields emitted by those slots would have pointed radially inward, which when combined with the electric fields of the northern and southern would produce non-fundamental wave mode propagation. Accordingly, configuration (B) as depicted in FIG. 18I can be used to generate electromagnetic waves at the northern and southern slots 1863 having e-fields that point radially outward and electromagnetic waves at the western and eastern slots 1863 with e-fields that also point radially outward, which when combined induce electromagnetic waves on cable 1862 having a fundamental wave mode.
In another embodiment, the waveguide system 1865 can be configured to enable a northerly, southerly, westerly and easterly slots 1863 all outside the median line 1890 , and disable all other slots 1863 as shown in configuration (C). Assuming the circumferential distance between a pair of opposing slots (e.g., northerly and southerly, or westerly and easterly) is a full wavelength apart, then configuration (C) can be used to generate electromagnetic waves having a non-fundamental wave mode with some e-fields pointing radially outward and other fields pointing radially inward. In yet another embodiment, the waveguide system 1865 can be configured to enable a northwesterly slot 1863 outside the median line 1890 , enable a southeasterly slot 1863 inside the median line 1890 , and disable all other slots 1863 as shown in configuration (D). Assuming the circumferential distance between such a pair of slots is a full wavelength apart, then such a configuration can be used to generate electromagnetic waves having a non-fundamental wave mode with e-fields aligned in a northwesterly direction.
In another embodiment, the waveguide system 1865 can be configured to produce electromagnetic waves having a non-fundamental wave mode with e-fields aligned in a southwesterly direction. This can be accomplished by utilizing a different arrangement than used in configuration (D). Configuration (E) can be accomplished by enabling a southwesterly slot 1863 outside the median line 1890 , enabling a northeasterly slot 1863 inside the median line 1890 , and disabling all other slots 1863 as shown in configuration (E). Assuming the circumferential distance between such a pair of slots is a full wavelength apart, then such a configuration can be used to generate electromagnetic waves having a non-fundamental wave mode with e-fields aligned in a southwesterly direction. Configuration (E) thus generates a non-fundamental wave mode that is orthogonal to the non-fundamental wave mode of configuration (D).
In yet another embodiment, the waveguide system 1865 can be configured to generate electromagnetic waves having a fundamental wave mode with e-fields that point radially inward. This can be accomplished by enabling a northerly slot 1863 inside the median line 1890 , enabling a southerly slot 1863 inside the median line 1890 , enabling an easterly slot outside the median 1890 , enabling a westerly slot 1863 outside the median 1890 , and disabling all other slots 1863 as shown in configuration (F). Assuming the circumferential distance between the northerly and southerly slots is a full wavelength apart, then such a configuration can be used to generate electromagnetic waves having a fundamental wave mode with radially inward e-fields. Although the slots selected in configurations (B) and (F) are different, the fundamental wave modes generated by configurations (B) and (F) are the same.
It yet another embodiment, e-fields can be manipulated between slots to generate fundamental or non-fundamental wave modes by varying the operating frequency of the electromagnetic waves 1866 supplied to the hollow rectangular waveguide portion 1867 . For example, assume in the illustration of FIG. 18H that for a particular operating frequency of the electromagnetic waves 1866 the circumferential distance between slot 1863 A and 1863 B is one full wavelength of the electromagnetic waves 1866 . In this instance, the e-fields of electromagnetic waves emitted by slots 1863 A and 1863 B will point radially outward as shown, and can be used in combination to induce electromagnetic waves on cable 1862 having a fundamental wave mode. In contrast, the e-fields of electromagnetic waves emitted by slots 1863 A and 1863 C will be radially aligned (i.e., pointing northerly) as shown, and can be used in combination to induce electromagnetic waves on cable 1862 having a non-fundamental wave mode.
Now suppose that the operating frequency of the electromagnetic waves 1866 supplied to the hollow rectangular waveguide portion 1867 is changed so that the circumferential distance between slot 1863 A and 1863 B is one-half a wavelength of the electromagnetic waves 1866 . In this instance, the e-fields of electromagnetic waves emitted by slots 1863 A and 1863 B will be radially aligned (i.e., point in the same direction). That is, the e-fields of electromagnetic waves emitted by slot 1863 B will point in the same direction as the e-fields of electromagnetic waves emitted by slot 1863 A. Such electromagnetic waves can be used in combination to induce electromagnetic waves on cable 1862 having a non-fundamental wave mode. In contrast, the e-fields of electromagnetic waves emitted by slots 1863 A and 1863 C will be radially outward (i.e., away from cable 1862 ), and can be used in combination to induce electromagnetic waves on cable 1862 having a fundamental wave mode.
In another embodiment, the waveguide 1865 ′ of FIGS. 18C, 18E and 18G can also be configured to generate electromagnetic waves having only non-fundamental wave modes. This can be accomplished by adding more MMICs 1870 as depicted in FIG. 18J . Each MMIC 1870 can be configured to receive the same signal input 1872 . However, MMICs 1870 can selectively be configured to emit electromagnetic waves having differing phases using controllable phase-shifting circuitry in each MMIC 1870 . For example, the northerly and southerly MMICs 1870 can be configured to emit electromagnetic waves having a 180 degree phase difference, thereby aligning the e-fields either in a northerly or southerly direction. Any combination of pairs of MMICs 1870 (e.g., westerly and easterly MMICs 1870 , northwesterly and southeasterly MMICs 1870 , northeasterly and southwesterly MMICs 1870 ) can be configured with opposing or aligned e-fields. Consequently, waveguide 1865 ′ can be configured to generate electromagnetic waves with one or more non-fundamental wave modes, electromagnetic waves with one or more fundamental wave modes, or any combinations thereof.
It is submitted that it is not necessary to select slots 1863 in pairs to generate electromagnetic waves having a non-fundamental wave mode. For example, electromagnetic waves having a non-fundamental wave mode can be generated by enabling a single slot from the plurality of slots shown in configuration (A) of FIG. 18I and disabling all other slots. Similarly, a single MMIC 1870 of the MMICs 1870 shown in FIG. 18J can be configured to generate electromagnetic waves having a non-fundamental wave mode while all other MMICs 1870 are not in use or disabled. Likewise other wave modes and wave mode combinations can be induced by enabling other non-null proper subsets of waveguide slots 1863 or the MMICs 1870 .
It is further submitted that the e-field arrows shown in FIGS. 18H-18I are illustrative only and represent a static depiction of e-fields. In practice, the electromagnetic waves may have oscillating e-fields, which at one instance in time point outwardly, and at another instance in time point inwardly. For example, in the case of non-fundamental wave modes having e-fields that are aligned in one direction (e.g., northerly), such waves may at another instance in time have e-fields that point in an opposite direction (e.g., southerly). Similarly, fundamental wave modes having e-fields that are radial may at one instance have e-fields that point radially away from the cable 1862 and at another instance in time point radially towards the cable 1862 . It is further noted that the embodiments of FIGS. 18H-18J can be adapted to generate electromagnetic waves with one or more non-fundamental wave modes, electromagnetic waves with one or more fundamental wave modes (e.g., TM 00 and HE 11 modes), or any combinations thereof. It is further noted that such adaptions can be used in combination with any embodiments described in the subject disclosure. It is also noted that the embodiments of FIGS. 18H-18J can be combined (e.g., slots used in combination with MMICs).
It is further noted that in some embodiments, the waveguide systems 1865 and 1865 ′ of FIGS. 18A-18J may generate combinations of fundamental and non-fundamental wave modes where one wave mode is dominant over the other. For example, in one embodiment electromagnetic waves generated by the waveguide systems 1865 and 1865 ′ of FIGS. 18A-18J may have a weak signal component that has a non-fundamental wave mode, and a substantially strong signal component that has a fundamental wave mode. Accordingly, in this embodiment, the electromagnetic waves have a substantially fundamental wave mode. In another embodiment electromagnetic waves generated by the waveguide systems 1865 and 1865 ′ of FIGS. 18A-18J may have a weak signal component that has a fundamental wave mode, and a substantially strong signal component that has a non-fundamental wave mode. Accordingly, in this embodiment, the electromagnetic waves have a substantially non-fundamental wave mode. Further, a non-dominant wave mode may be generated that propagates only trivial distances along the length of the transmission medium.
It is also noted that the waveguide systems 1865 and 1865 ′ of FIGS. 18A-18J can be configured to generate instances of electromagnetic waves that have wave modes that can differ from a resulting wave mode or modes of the combined electromagnetic wave. It is further noted that each MMIC 1870 of the waveguide system 1865 ′ of FIG. 18J can be configured to generate an instance of electromagnetic waves having wave characteristics that differ from the wave characteristics of another instance of electromagnetic waves generated by another MMIC 1870 . One MMIC 1870 , for example, can generate an instance of an electromagnetic wave having a spatial orientation and a phase, frequency, magnitude, electric field orientation, and/or magnetic field orientation that differs from the spatial orientation and phase, frequency, magnitude, electric field orientation, and/or magnetic field orientation of a different instance of another electromagnetic wave generated by another MMIC 1870 . The waveguide system 1865 ′ can thus be configured to generate instances of electromagnetic waves having different wave and spatial characteristics, which when combined achieve resulting electromagnetic waves having one or more desirable wave modes.
From these illustrations, it is submitted that the waveguide systems 1865 and 1865 ′ of FIGS. 18A-18J can be adapted to generate electromagnetic waves with one or more selectable wave modes. In one embodiment, for example, the waveguide systems 1865 and 1865 ′ can be adapted to select one or more wave modes and generate electromagnetic waves having a single wave mode or multiple wave modes selected and produced from a process of combining instances of electromagnetic waves having one or more configurable wave and spatial characteristics. In an embodiment, for example, parametric information can be stored in a look-up table. Each entry in the look-up table can represent a selectable wave mode. A selectable wave mode can represent a single wave mode, or a combination of wave modes. The combination of wave modes can have one or dominant wave modes. The parametric information can provide configuration information for generating instances of electromagnetic waves for producing resultant electromagnetic waves that have the desired wave mode.
For example, once a wave mode or modes is selected, the parametric information obtained from the look-up table from the entry associated with the selected wave mode(s) can be used to identify which of one or more MMICs 1870 to utilize, and/or their corresponding configurations to achieve electromagnetic waves having the desired wave mode(s). The parametric information may identify the selection of the one or more MMICs 1870 based on the spatial orientations of the MMICs 1870 , which may be required for producing electromagnetic waves with the desired wave mode. The parametric information can also provide information to configure each of the one or more MMICs 1870 with a particular phase, frequency, magnitude, electric field orientation, and/or magnetic field orientation which may or may not be the same for each of the selected MMICs 1870 . A look-up table with selectable wave modes and corresponding parametric information can be adapted for configuring the slotted waveguide system 1865 .
In some embodiments, a guided electromagnetic wave can be considered to have a desired wave mode if the corresponding wave mode propagates non-trivial distances on a transmission medium and has a field strength that is substantially greater in magnitude (e.g., 20 dB higher in magnitude) than other wave modes that may or may not be desirable. Such a desired wave mode or modes can be referred to as dominant wave mode(s) with the other wave modes being referred to as non-dominant wave modes. In a similar fashion, a guided electromagnetic wave that is said to be substantially without the fundamental wave mode has either no fundamental wave mode or a non-dominant fundamental wave mode. A guided electromagnetic wave that is said to be substantially without a non-fundamental wave mode has either no non-fundamental wave mode(s) or only non-dominant non-fundamental wave mode(s). In some embodiments, a guided electromagnetic wave that is said to have only a single wave mode or a selected wave mode may have only one corresponding dominant wave mode.
It is further noted that the embodiments of FIGS. 18H-18J can be applied to other embodiments of the subject disclosure. For example, the embodiments of FIGS. 18H-18J can be used as alternate embodiments to the embodiments depicted in FIGS. 18A-18G or can be combined with the embodiments depicted in FIGS. 18A-18G .
Referring to FIG. 19A , a system 1900 is illustrated in which an Unmanned Aircraft System (UAS) includes an unmanned aircraft 1910 and a control device 1920 , which is depicted as a handheld remote controller, but can be any type of a control device including one that is located within a centralized control room, a mobile control system (e.g., located in a vehicle such as a van), or other control systems. The control device 1920 can provide control signals to the unmanned aircraft 1910 that enable the unmanned aircraft to fly in proximity to a transmission medium or wire 1930 , such as one connected to a support structure (e.g., a pole). The wire can be any type of transmission medium, such as a power wire suspended between poles or other types of suspended lines or cables or other types of transmission mediums, including a transmission medium connected between two communication devices. The unmanned aircraft 1910 has the ability to fly with sufficient stability to position objects at desired locations, such as at a target position along the wire 1930 . The use of the unmanned aircraft 1910 enables delivery of objects to particular locations without requiring bucket trucks or other provider equipment that is often required for reaching difficult areas. The unmanned aircraft 1910 has the ability to ascend and descend into these difficult-to-reach areas while carrying an object.
Unmanned aircraft 1910 can include a carrying system 1915 that enables carrying of objects, such as a communication device 1950 . Examples described herein are done so with respect to a communication device 1950 that can be a waveguide device, however, the object to be deployed and/or retrieved can be any type of device, including a fuse, antenna, and so forth. The carrying system 1915 can be of various types and can operate utilizing various techniques that enable securing the object, carrying the object while in flight, and releasing the object. As an example, the carrying system 1915 can be a group of arms or clamping members that are movable to clamp around or otherwise carry the object and then can release the object when desired. Other carrying systems 1915 can include a carrying cable that removably attaches to the object so the unmanned aircraft 1910 can carry the object during flight and then release the object.
In one or more embodiments, the carrying system 1915 can utilize compressive force and/or magnetic force to hold the communication device 1950 . In one or more embodiments, the carrying system 1915 can be made of material that facilitates holding objects, such as grips and so forth. In one or more embodiments, the carrying system 1915 can include locking member(s) that lock or otherwise securely engage with corresponding member(s) of the communication device 1950 . The locking member(s) can be released via actuation (e.g., by the unmanned aircraft 1910 and/or the communication device 1950 ), or can be released based on a particular movement of the carrying system 1915 with respect to the communication device.
The carrying system 1915 of the unmanned aircraft 1910 can be controlled by various devices or combinations of devices, such as the remote control device 1920 , the communication device 1950 , and/or another device. In one embodiment, the remote control device 1920 can provide a control signal to the unmanned aircraft 1910 to open, close or otherwise actuate the carrying system 1915 . In another embodiment, a control signal for opening or closing the carrying system 1915 can be generated without user input, such as responsive to an automatic detection that the communication device 1950 has been physically connected with the wire 1930 . For instance, closing of a latching mechanism on the communication device 1950 that secures the communication device to the wire 1930 can be detected by a sensor on the communication device and can trigger a control signal that is transmitted to the unmanned aircraft 1910 to cause the carrying system 1915 to release the communication device. In one embodiment, the actuation of the carrying system 1915 to open it can be based on a first signal generated by detection of closing of the latching mechanism on the communication device 1950 (e.g., via a sensor on the latching mechanism) and a second signal generated via user input at the remote device 1920 which approves the opening of the carrying system 1915 .
In one embodiment, the unmanned aircraft 1910 can include a video camera that captures video images and transmits the video images to a display device (e.g., integrated with the control device 1920 ) to facilitate the flying of the unmanned aircraft and the positioning of the communication device 1950 in proximity to the wire 1930 . Other sensing devices can be integrated with the unmanned aircraft 1920 (with or without the video camera) and can be utilized to facilitate the positioning of the communication device 1950 in proximity to the transmission medium 1930 , such as a distance detector, accelerometer, gyroscope, and so forth. In one embodiment, the operator can see in the captured images that the communication device 1950 has been securely connected to the wire 1930 and can transmit a control signal to the carrying system 1915 to release the communication device.
Referring additionally to FIG. 19B , the communication device 1950 (or other objects) can be physically connected to the wire 1930 when the communication device is positioned in proximity to the wire by the unmanned aircraft 1910 . In one or more embodiments, the communication device 1950 can include a latching mechanism that enables or otherwise facilitates the physical connection between the communication device and the wire 1930 . In one or more embodiments, the communication device 1950 can be a waveguide system as described herein. For example, the waveguide system 1950 can, when physically connected on the wire 1930 , provide communication by electromagnetic waves. For instance, at a physical interface of the wire 1930 , the electromagnetic waves can propagate without utilizing an electrical return path, the electromagnetic waves can be guided by the wire, and/or the electromagnetic waves can have a non-optical frequency range.
FIGS. 19A & 19B illustrate deployment and installation of the communication device 1950 by way of physical connection with the wire 1930 . The unmanned aircraft 1910 can also be utilized for uninstalling and retrieving objects, such as the communication device 1950 . For instance, the unmanned aircraft 1915 can fly in proximity to a communication device 1950 (or other object) that is physically connected to the wire 1930 . The carrying system 1915 can be actuated so that the communication device 1950 is secured by the unmanned aircraft for flight. The latching mechanism of the communication device 1950 can be actuated resulting in releasing the physical connection between the communication device and the wire 1930 . The unmanned aircraft 1910 can then carry the communication device 1950 back to a desired location for repair or other actions. The uninstalling and retrieving of objects or communication devices is not limited to ones that are physically connected with the transmission medium or wire 1930 but can be used at other locations.
In one or more embodiments, the communication device 1950 (e.g., the waveguide system), when physically connected on the wire 1930 , can receive power from the wire via an inductive coupling with the wire. The power obtained via the inductive coupling can be a sole source of power for the communication device 1950 or can be used in conjunction with another power source, such as a battery.
As an example in FIGS. 20A and B, block diagrams are illustrated of example, non-limiting embodiments of slotted waveguide systems 2050 and 2051 in accordance with various aspects described herein that can be carried by the unmanned aircraft 1910 and physically connected with the wire 1930 . In FIG. 20A , the configuration of the waveguide system 2050 enables the waveguide to be positioned with respect to the wire 1930 , such that the wire fits within or near a slot formed in the waveguide that runs longitudinally with respect to the wire. The slot surfaces of the waveguide 2050 can be non-parallel. For example, slot surfaces 2010 a and 2010 b can be non-parallel and aim outwardly, wider than the width of the wire 1930 . Any range of angles of the non-parallel slot surfaces can be utilized to facilitate passing the wire into the slot. A latching mechanism 2011 can be utilized that enables closing or clamping the waveguide 2050 with respect to the wire 1930 to physically connect the waveguide to the wire. The latching mechanism 2011 can be of various types and can utilize various techniques to enable the waveguide 2050 to be physically connected with the wire 1930 .
In one or more embodiments, the latching mechanism 2011 can be separable or otherwise configured to facilitate the physical connection with the wire 1930 . As an example, the latching mechanism 2011 can be selectively separated and moved back together so as to clamp onto or otherwise physically connect with the wire 1930 . The method of opening, closing or actuating the latching mechanism 2011 can vary including via a magnetic field, a servo-motor, a pushrod, and so forth. In one embodiment, the magnetic field can be reversible so as to be able to open or close the latching mechanism 2011 . In one or more embodiments, the waveguide 2050 can be self-closing, such as automatically actuating the latching mechanism 2011 of the waveguide to physically connect with the wire 1930 when in proximity to the wire.
In one or more embodiments, the latching mechanism 2011 can open or close responsive to a latching signal generated by the waveguide 2050 , generated by a remote control device (e.g., control device 1920 ) and/or generated by another device, such as the unmanned aircraft 1910 utilized to deliver the waveguide as described herein. In one or more embodiments, the latching signal can cause generation of a magnetic field having a polarity that causes the latching mechanism 2011 to open or close depending on the magnetic field polarity. In this example, the latching mechanism 2011 can include various movable components that will move when positioned within the generated magnetic field.
In one or more embodiments, the unmanned aircraft 1910 can include an engagement member(s) that can engage with or otherwise physically actuate a movable component of the latching mechanism. For example, illustrated in FIG. 20A is a pair of push rods 2012 which are shown when the latching mechanism 2011 is in a closed positioned. The push rods 2012 can be contacted with (e.g., by engagement members 2013 of the unmanned aircraft 1910 ) and pushed so that the push rods (which in this example are pivotally connected with the waveguide 2050 ) force the latching mechanism 2011 closed. In one embodiment, the engagements members 2013 can be moveable (e.g., sliding towards the push rods 2012 ) by the unmanned aircraft 1910 in order to apply a force on the latching mechanism 2011 to open or close the latching mechanism. The particular configuration of the push rods 2012 and/or engagement members 2013 can vary, and FIG. 20A represents a schematic diagram of one such example. In one embodiment, the latching signal can cause the engagement members 2013 to engage with the latching mechanism 2011 resulting in the latching mechanism opening or closing.
In FIG. 20B , the waveguide system 2051 shows the wire 1930 that fits within a slot formed in the waveguide. The slot surfaces 2018 a and 2018 b in this exemplary embodiment can be parallel, but the axis 2026 of the wire 1930 is not aligned with the axis 2024 of the waveguide 2051 . The waveguide 2051 and the wire 1930 are therefore not coaxially aligned. In another embodiment, a possible position of the wire at 2022 also has an axis 2028 that is not aligned with the axis 2024 of the waveguide 2051 .
A latching mechanism 2021 or 2031 can be utilized that enables closing or clamping the waveguide 2051 with respect to the wire 1930 to physically connect the waveguide to the wire. The latching mechanism 2021 or 2031 can be of various types and can utilize various techniques to enable the waveguide 2051 to be physically connected with the wire 1930 . As described herein, the latching mechanism 2021 or 2031 can be separated and moved together to clamp onto or otherwise physically connect with the wire 1930 . The opening or closing of the latching mechanism 2021 or 2031 can be performed in various ways including via a magnetic field, a servo-motor, a pushrod, and so forth. In one embodiment, the magnetic field can be reversible so as to be able to selectively open or close the latching mechanism 2021 or 2031 . In one or more embodiments, the latching mechanism 2021 or 2031 can open or close responsive to a latching signal generated by one or more of various sources such as the waveguide 2051 , a remote control device (e.g., device 1920 ), the unmanned aircraft 1910 , or some other device.
It is to be appreciated that while different embodiments showing non-parallel slot surfaces, and coaxially unaligned wires and waveguide were shown separately in FIGS. 20A and 20B , in various embodiments, diverse combinations of the listed features are possible.
Turning to FIGS. 21A, 21B & 21C , a system 2100 is illustrated in which the unmanned aircraft 1910 can fly in proximity to the wire 1930 to enable an object, such as the communication device 1950 , to be physically connected with the wire. In this example, the unmanned aircraft 1910 can be equipped with a carrying system 2115 that includes a carrying cable or tether that removably connects to the communication device 1950 . The carrying cable of the carrying system 2115 can facilitate positioning the communication device 1950 close enough to the wire 1930 to enable the physical connection. The removable connection between the carrying cable and the communication device 1950 can utilize various components or techniques such as locking mechanisms, a magnetic field, and so forth. In one embodiment, the carrying cable can be affixed to the communication device 1950 and the unmanned aircraft 1910 can release the carrying cable with the communication device when the communication device is physically connected with the wire 1930 . In one embodiment, the carrying cable of the carrying system 2115 can be extendible and/or retractable to further facilitate maneuvering of the communication device 1950 into a desired position with respect to the wire 1930 .
In one embodiment, the length of the carrying cable of the carrying system 2115 can be selected or adjusted based on the particular environment. For example, a longer carrying cable of the carrying system 2115 can be utilized where there are multiple levels of wires connected with a pole and the communication device 1950 is to be physically connected with a wire at a lower level. This can enable the unmanned aircraft 1910 to fly or hover in a safe position away from the structure (e.g., the pole or a wire at an upper level) while the communication device 1950 is moved into proximity to the desired wire 1930 . In one embodiment, the carrying cable of the carrying system 1915 can be retracted during flight so that the communication device 1950 is relatively close to the unmanned aircraft 1910 to increase stability during flight and then can be extended or otherwise lowered away from the unmanned aircraft so that the communication device is relatively remote from the unmanned aircraft to facilitate connection of the communication device with the wire 1930 .
In one embodiment, the carrying cable of the carrying system 1915 can be utilized in conjunction with other carrying components of the carrying system 1915 . For example, the carrying system 1915 can include a group of arms or other clamping members that are movable to clamp around or otherwise carry the communication device 1950 during flight (e.g., as illustrated in system 1900 of FIGS. 19A & 19B ) to provide for increased stability. Once the destination is reached, such as the unmanned aircraft 1910 hovering above the wire 1930 , the unmanned aircraft can actuate the clamping members to release the grip on the communication device 1950 . The carrying cable (which may be extendible from the unmanned aircraft 1910 ) can then be used to lower the communication device 1950 into a desired position in proximity to the wire 1930 . As explained herein, various devices or a combination of devices can exert control over the carrying system 1915 such as a remote control device (e.g., device 1920 of system 1900 ), the unmanned aircraft 1910 , or some other device.
FIG. 21A illustrates the unmanned aircraft 1910 approaching the wire 1930 with the carrying cable of the carrying system 2115 in a fully extended positioned. FIG. 21B illustrates the unmanned aircraft 1910 hovering above the wire 1930 to place the communication device 1950 in close proximity to the wire 1930 . FIG. 21C illustrates the unmanned aircraft 1910 flying away from the wire 1930 after the communication device 1950 has been physically connected with the wire 1930 and after the carrying cable of the carrying system 2115 has released the communication device.
In one embodiment, the communication device 1950 can be a self-closing device that includes a latching mechanism for automatically clamping onto the wire 1930 , such as when contact is made between the wire and the latching mechanism or when a sensor (e.g., of the latching mechanism) detects that the wire is close enough to enable clamping by the latching mechanism. In one embodiment, the physical connection of the communication device 1950 to the wire 1930 can be performed without user interaction. In one embodiment, the communication device 1950 can be a waveguide and the latching mechanism can be part of the structure of the waveguide, such as a core that is selectively separable (e.g., two parts that are connected via a hinge) and can be closed down on the wire 1930 .
In one embodiment, the communication device 1950 can be formed from two or more portions that are moveable together. For example, the communication device 1950 can be a waveguide that includes a core separated into two (or more) sub-cores connected by way of a hinge, a pivotal connection or another connection that enables the sub-cores to be separated and to be moved together. In one embodiment, the connection can be biased, such as by a spring or other biasing mechanism. In one embodiment, the connection can be biased towards a closed position and can include a lock/release mechanism that holds the connection in an open position (i.e., the sub-cores are separated so that a transmission medium (e.g., a wire) can be moved into a center of the core). In this example, the lock/release mechanism can be actuated (e.g., by a push rod) when the wire is positioned in the center of the core and the bias causes the sub-cores to move together resulting in the waveguide physically connecting with the wire.
In one or more embodiments, the latching mechanism of the communication device 1950 can open or close responsive to a latching signal generated by a remote control device (e.g., control device 1920 of system 1900 ) and/or generated by another device, such as the unmanned aircraft 1910 . In one or more embodiments, the closing of the latching mechanism can trigger the opening or actuation of the carrying system 1915 to release the communication device 1950 . For example, the closing of the latching mechanism that creates the physical connection between the communication device 1950 and the wire 1930 can be detected by the unmanned aircraft 1910 causing the unmanned aircraft to actuate the carrying cable and release the communication device. In another embodiment, the unmanned aircraft 1910 can include a video camera (as illustrated in system 1900 ) which enables the operator of the remote control 1920 to see that the communication device 1950 has successfully clamped onto the wire 1930 and then the operator can transmit a release signal to the connection system 1915 of the unmanned aircraft 1910 to release the communication device. As described herein, the unmanned aircraft 1910 can also be utilized to uninstall and retrieve equipment of the communication system, such as hovering above the communication device 1950 , engaging the carrying system 1915 with the communication device, triggering the latching mechanism of the communication device to release the physical connection with the wire 1930 , and flying back to a desired location carrying the communication device.
Turning now to FIG. 22 , a flow diagram of an example, non-limiting embodiment of a method 2200 , is shown. In particular, a method is presented for use with one or more functions and features presented in conjunction with FIGS. 1-21C and is described with respect to delivering a communication device, such as a waveguide as described in system 1900 of FIGS. 19A & 19B . However, method 2200 can be utilized for deploying, installing, uninstalling, and/or retrieving various objects, including various types of communication devices including other service provider equipment such as fuses, dielectric antennas, and so forth. Method 2200 enables rapid and efficient management of provider equipment, particular in more difficult to reach areas, such as along suspended wires. In one or more embodiments, various pre-flight checks or procedures can be performed for the unmanned aircraft 1910 including checking metrics associated with safe flight conditions (e.g., payload characteristics, weather conditions, confirming operability of sensors, and so forth).
At 2202 , the unmanned aircraft 1910 can fly to a desired location (e.g., wire 1930 suspended between poles) while carrying the waveguide. The unmanned aircraft 1910 can be under the control of an operator such as via a remote control device (e.g., device 1920 ). The unmanned aircraft 1910 can be launched from various locations, including from a vehicle that drives into the vicinity of the particular location. In one embodiment, the vehicle can carry multiple waveguides so that the unmanned aircraft can deploy them at various positions along different wires 1930 .
At 2204 and 2206 , a physical connection can be established between the waveguide and the wire 1930 . As described herein, various components and techniques can be utilized for initiating, controlling and/or implementing the physical connection, such as via an automatically self-closing waveguide that is triggered upon contact with the wire 1930 , a latching mechanism of the waveguide that is triggered by the unmanned aircraft 1910 , a magnetic field that can close the latching mechanism, a servo-motor that causes moveable component(s) to clamp onto the wire, a video camera that enables an operator to visualize in real-time the latching mechanism (e.g., via a display device) and actuate the latching mechanism, and so forth.
At 2208 , once it is confirmed that a physical connection has been established, the waveguide can be released from the carrying system 1915 of the unmanned aircraft 1910 . For example, a release signal can be generated that causes the carrying system 1915 to release the waveguide. The carrying system 1915 can function utilizing various components and techniques such as movable clamping arms, magnetic components, and so forth. The release signal can be generated by various sources, such as the remote control device 1920 , the unmanned aircraft 1910 , and/or the waveguide, and can be generated with or without user interaction.
In one or more embodiments, the unmanned aircraft 1910 can be utilized to deploy different types of equipment. For example, the unmanned aircraft 1910 can fly to a location and facilitate connection of a waveguide that is physically connected with a power line and can also fly to the same location and facilitate connection of other equipment (e.g., a dielectric antenna, another transmission medium connected between the waveguide and the dielectric antenna, and so forth) that is connected to the power line or to other structure at the location, such as to a support structure such as a pole. In this example, the carrying system 1915 of the unmanned aircraft 1910 can be adjustable to carry these different devices which may have different sizes, shapes, and/or weights, such as utilizing a group of arms or clamping members that are movable to clamp around the different devices.
While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIG. 22 , it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Moreover, not all illustrated blocks may be required to implement the methods described herein.
Referring to FIG. 23A , a schematic diagram of portion of a communication device 2300 is illustrated where the communication device allows for a connection (e.g., removable connection) with the transmission medium 1930 and allows for obtaining power, via inductive coupling, from the transmission medium. The portion of the communication device 2300 being shown includes components that facilitate the physical connection and inductive coupling with the transmission medium, but various other components that facilitate other functions such as transmitting and/or receiving communications can be included in the communication device. The transmission medium 1930 can be of various types, including insulated or non-insulated power lines.
Communication device 2300 is illustrated with a core 2310 in an opened position, which provides access to an opening 2315 through the core. The opening 2315 can be concentrically aligned with the core or can be non-concentrically aligned with the core (i.e., offset from the center of the core). The opening 2315 can be circular or can be other shapes including a polygon as described herein. The size and/or shape of the opening 2315 can be selected based on various factors, including the size and/or shape of the transmission medium, the connection technique being utilized for the transmission medium, and so forth. In one or more embodiments, the diameter of the opening 2315 of the core 2310 can be the same or substantially the same as the outer diameter of the transmission medium 1930 to provide a close fitting of the transmission medium within the opening. In another embodiment, an inner surface 2317 of the core 2310 can include a foam or other materials. In one embodiment, the foam or other materials can be selected (e.g., type of material, height, density, and so forth) so as to enable electromagnetic waves as described herein to pass through the foam or other materials (e.g., guided by the transmission medium 1930 ).
In this example, core 2310 is composed of two core portions or sub-cores 2310 A and 2310 B, although any number of core portions can be utilized. The core portions 2310 A and 2310 B can be moveable with respect to each other utilizing a connection mechanism 2320 . For instance, the connection mechanism 2320 can be a pivot or hinge that facilitates movement of one of the core portions with respect to the other of the core portions. In one embodiment, the connection mechanism 2320 can include a biasing mechanism 2325 (e.g., a coil spring). As an example, the connection mechanism 2320 can be movable (e.g., rotated) such that a first movement to a first position (illustrated in FIG. 23A ) causes the core portions 2310 A and 2310 B to separate to provide access to the opening 2315 . As illustrated in FIG. 23B , a second movement of the connection mechanism 2320 to a second position causes the core portions 2310 A and 2310 B to come together so as to circumscribe or otherwise surround the transmission medium 1930 that is positioned through the opening 2315 of the core 2310 . In one embodiment, the connection mechanism 2320 can include a locking mechanism 2330 , where a hinge is biased towards the second closed position, where the locking mechanism selectively locks the hinge in the first opened position, and where unlocking the locking mechanism causes the connection mechanism to close thereby closing the core 2310 around (or circumscribing) the transmission medium 1930 .
In one or more embodiments, the communication device 2300 can include a housing 2340 for supporting the core 2310 and/or other components of the communication device 2300 . For example, the housing 2340 can include housing portions 2340 A and 2340 B. In one embodiment, the core portions 2310 A and 2310 B can be physically connected with the housing portions 2340 A and 2340 B, respectively, where the connection mechanism 2320 is physically connected with the housing 2340 to enable the housing portions to be selectively separated and joined together (e.g., via a pivoting or rotating motion).
In one or more embodiments, not illustrated, the closing of housing 2310 A and 2310 B may be facilitated by a hinged bridging mechanism that initially holds the two housings apart, but collapses or folds up when the housing assembly is placed on the wire 1930 . The weight of the housings collapses the hinged bridging mechanism. In its collapsing state the hinged bridging mechanism can then no longer resist the closing force of coil spring 2325 and the two housings 2310 A & B proceed to close around the cable 1930 . An air or fluid dampening mechanism may be employed in the hinging mechanism to slow the rate of housing closure.
In one or more embodiments, one or both of the core portions 2310 A and 2310 B can include a compressible material 2350 that becomes compressed when the connection mechanism 2320 is in the second closed position and the core portions are brought together. As an example, the compressible material 2350 can be of a type that increases magnetic field conductivity when the core portions 2310 A and 2310 B are brought together.
In one or more embodiments as illustrated in FIGS. 23C and 23D , the communication device 2300 can include a clamping mechanism 2360 that facilitates self-alignment with the transmission medium 1930 . For example, the clamping mechanism 2360 can include an inner shape (e.g., a polygon) with a number of flat surfaces that when closed on the circular shape of a transmission medium 1930 act to self-center the transmission medium within the closing mechanism. In one embodiment, the clamping mechanism 2360 can include self-centering jaws 2360 A and 2360 B. FIG. 23D illustrates the communication device 2300 when the core 2310 is in the first opened position while FIG. 23D illustrates the communication device when the core is in the second closed position and thus the clamping mechanism 2360 is closed on the transmission medium 1930 . The clamping mechanism 2360 can be connected with the core 2310 and/or the housing 2340 so that the clamping mechanism is moveable between opened and closed positioned (e.g., the self-centering jaws 2360 A and 2360 B selectively being separated and moved together).
Referring to FIG. 23E , the self-centering jaws 2360 A and 2360 B are illustrated being moved together to clamp onto the transmission medium 1930 . In this example, the self-centering jaws 2360 A and 2360 B are shown moving in a linear path but they can move in various paths, such as rotating as in FIGS. 23C and 23D . As shown in FIGS. 23F-23H , the inner shape of the self-centering jaws 2360 A and 2360 B allows transmission mediums of different diameters to be clamped and/or self-centered. In one embodiment, one or both of the self-centering jaws 2360 A and 2360 B can have a spring-loaded connection with the core 2310 and/or housing 2340 . In this example, the spring-loaded connection enables the self-centering jaws 2360 A and 2360 B to move with respect to the core 2310 and/or housing 2340 so that transmission mediums 1930 of different diameters can be clamped down on while still allowing the core 2310 to be closed.
Referring to FIG. 24 , a schematic diagram of portion of a communication device 2400 is illustrated where the communication device allows for a connection with the transmission medium 1930 and allows for obtaining power, via inductive coupling, from the transmission medium. The portion of the communication device 2400 being shown includes components that facilitate the physical connection and inductive coupling with the transmission medium, but various other components that facilitate other functions such as transmitting and/or receiving communications can be included in the communication device.
Communication device 2400 is illustrated in an exploded view with a core 2410 having lower and upper core portions 2410 A and 2410 B. The lower and upper core portions 2410 A and 2410 B are moveable, which provides access to an opening 2415 through the core 2410 . A lower housing portion 2440 is illustrated which can moveably (e.g., rotationally) connect with an upper housing portion (not shown) via a connection mechanism (e.g., a hinge or pivot opening 2422 is shown that can engage with a hinge or pivot that is not shown) to enable the separation and adjoining of the lower and upper core portions 2410 A and 2410 B. One or both of the core portions 2410 A and 2410 B (e.g., at the ends) can include a compressible material 2450 that becomes compressed when the core portions 2410 A and 2410 B are brought together, such as a compressible material that increases magnetic field conductivity.
In one or more embodiments, the core 2410 can be a group of cores (that are each separable into more than one core portion). In one or more embodiments, all or some of the group of cores can be coaxially aligned. In one or more embodiments, a support carriage 2475 (e.g., an elastomer carriage) can be utilized to support each of the lower core portions 2410 A, such as having support slots where the lower core portions sit partially in the support slots. For instance, the support carriage 2475 can support each of the lower core portions 2410 A while also keeping the lower core portions isolated from each other. In this example, each core of the group of cores 2410 can function in parallel as an inductive power coupling with the transmission medium 1930 . Various other components to facilitate the inductive power coupling can be included in the communication device 2400 , such as a secondary winding for each of the cores, a power control circuit, a battery, and so forth.
Referring to FIG. 25 , a schematic diagram of portion of a communication device 2500 is illustrated where the communication device allows for a connection with the transmission medium 1930 and allows for obtaining power, via inductive coupling, from the transmission medium. The portion of the communication device 2500 being shown includes components that facilitate inductive coupling with the transmission medium and facilitate providing communications, but various other components that facilitate other functions can be included in the communication device.
Communication device 2500 is illustrated in an exploded view with a single core 2510 having lower and upper core portions 2510 A and 2510 B. The lower and upper core portions 2510 A and 2510 B are moveable (the connection mechanism not being shown), which provides access to an opening 2515 through the core 2510 . One or both of the core portions 2510 A and 2510 B (e.g., at the ends) can include a compressible material 2550 that becomes compressed when the core portions 2510 A and 2510 B are brought together, such as a compressible material that increases magnetic field conductivity.
Communication device 2500 can include a battery 2580 that is chargeable by an inductive coupling with the transmission medium 1930 (e.g., utilizing the core 2510 and a secondary winding around the core (not shown). Communication device 2500 can also include a voltage rectifier and/or spike suppression circuit 2585 for controlling the amount of power being obtained from the transmission medium and/or protecting the circuit components of the communication device 2500 .
In one or more embodiments, the communication device 2500 can include one or more waveguide devices 2590 (two of which are shown). The waveguide device(s) 2590 can be utilized for transmitting and/or receiving communications utilizing the transmission medium as a guide. For example, the waveguide device(s) 2590 can provide communication by electromagnetic waves at a physical interface of the transmission medium 1930 that propagate without utilizing an electrical return path, where the electromagnetic waves are guided by the transmission medium, and/or where the electromagnetic waves have a non-optical frequency range. In this example, the two waveguide devices 2590 are positioned in proximity to the transmission medium 1930 to enable generating the electromagnetic waves at the physical interface of the transmission medium and are positioned on opposing sides of the core 2510 so that the electromagnetic waves can bypass the core. For example, electromagnetic waves can be received by one of the waveguide devices 2590 and corresponding signals can be provided to a waveguide circuit 2599 of circuit board 2595 which then transmits corresponding electromagnetic waves via the other of the waveguide devices 2590 .
In one or more embodiments, a single waveguide device 2590 can be utilized where the communication device 2500 is an endpoint node or where the electromagnetic waves are capable of being guided by the transmission medium 1930 past the core 2510 , such as where a foam or other materials along the inner surface of the core provides a region for the electromagnetic waves to propagate past the core (e.g., between the outer surface of the transmission medium and the inner surface of the core). In one or more embodiments, the circuit board 2595 can include a power circuit 2597 that facilitates obtaining power from the transmission medium 1930 via an inductive coupling and which is used for powering the communication device 2500 .
Referring to FIG. 26 , a schematic diagram of portion of a communication device 2600 is illustrated where the communication device allows for a connection with the transmission medium 1930 , allows for obtaining power, via inductive coupling, from the transmission medium, and has a locking mechanism to facilitate clamping the communication device onto the transmission medium. The portion of the communication device 2600 being shown includes components that facilitate inductive coupling with the transmission medium, but various other components that facilitate other functions, such as communications in conjunction with the transmission medium, can be included in the communication device.
Communication device 2600 is illustrated in an opened position with lower and upper core portions 2610 A and 2610 B and lower and upper housing portions 2640 A and 2640 B that are pivotally connected via a connection mechanism 2620 . The lower and upper core portions 2610 A and 2610 B are moveable, which provide access to an opening 2615 through the core 2610 . In this example, the core portion 2610 A (e.g., at the ends) includes a compressible material 2650 that becomes compressed when the core portions 2610 A and 2610 B are brought together, such as a compressible material that increases magnetic field conductivity. In this example, the communication device 2600 includes a chargeable battery 2680 , a voltage rectifier and/or spike suppression circuit 2685 for controlling the amount of power being obtained from the transmission medium and/or protecting the circuit components of the communication device 2500 , and/or a circuit board 2695 that facilitates obtaining power from the transmission medium 1930 via an inductive coupling and which is used for powering the communication device 2500 , as well as facilitates providing communications, such as by electromagnetic waves guided by the transmission medium 1930 .
In this example, the connection mechanism 2620 includes a locking mechanism 2630 that can be actuated or released by an engagement member 2613 that can engage with or otherwise physically actuate the locking mechanism. The engagement member 2613 is illustrated as a moveable push/pull (hot stick), rod that can be engaged with the locking mechanism 2630 but various types of engagement members can be utilized. In one embodiment, a latching signal can be generated that causes the engagement member 2613 to engage with the locking mechanism 2630 resulting in the connection mechanism 2620 closing (where the closing mechanism is biased towards the closed position such as by a coil spring). In one or more embodiments, a support carriage 2675 (e.g., an elastomer carriage) can be utilized to support the lower core portion 2610 A and to provide a bias towards the upper core portion 2610 B to assist the core being held together and improve magnetic field conductivity for the core. The support carriage 2675 can be a pressure pad that applies alignment force to the lower core portion 2610 A.
In one or more embodiments, a secondary winding 2611 (connected to one or more components of the communication device 2600 ) can be provided wrapping around the core, such as wrapping around the lower and/or upper core portions 2610 A and 2610 B to facilitate the inductive power coupling between the communication device 2600 and the transmission medium. In one or more embodiments, the secondary winding 2611 includes a toroidal winding. In one or more embodiments, the inductive behavior of the inductive core may be configure where core 2610 A does not have a secondary winding, (not illustrated), but still provides conduct magnetic coupling to core 2710 B via magnetically conductive pads 2650 .
In one or more embodiments, the communication device 2600 can include an operational indicator 2612 (e.g., a status lamp) indicative an active status of the communication device, such as when it is receiving power from the transmission medium 1920 and/or when it is providing communications.
Referring to FIG. 27 , a schematic diagram of portion of a communication device 2700 is illustrated where the communication device allows for a removable connection with the transmission medium 1930 , allows for obtaining power, via inductive coupling, from the transmission medium, and has a locking mechanism to facilitate clamping the communication device onto the transmission medium. The portion of the communication device 2700 being shown includes components that facilitate inductive coupling with the transmission medium, but various other components that facilitate other functions, such as communications in conjunction with the transmission medium, can be included in the communication device. Communication device 2700 can include many features similar to communication device 2600 such as lower and upper housing portions, a pivotal connection, a compressible material, a chargeable battery, a voltage rectifier and/or spike suppression circuit, a circuit board and so forth.
In one or more embodiments, the lower and upper core portions 2710 A and 2710 B of core 2710 can be formed by way of a wound ribbon 2711 of a magnetic alloy as shown in the enlarged view of FIG. 27 . As an example, the magnetic alloy can be wrapped along with an electrical insulator 2712 , such as an adhesive electrical insulator, to form a wound core 2710 having layers separated (e.g., electrically isolated) by the electrical insulator. In one or more embodiments, the core 2710 can be formed from an amorphous metal alloy, such as Metglas. In one or more embodiments, the core 2710 can be formed from an electrical Si Steel. In one or more embodiments, the housing 2740 can be formed from a potting compound and can include a water-tight seal 2741 (e.g., rubber) between the lower and upper housing portions 2740 A and 2740 B.
Referring to FIG. 28 , a schematic diagram of a communication device 2800 is illustrated where the communication device allows for a connection with the transmission medium 1930 , allows for obtaining power via inductive coupling with the transmission medium, and allows for providing communications. The communication device 2800 being shown includes components that facilitate inductive coupling with the transmission medium 1930 to obtain power for the communication device.
In this example, the communication device 2800 can include an inductive power module 2805 , a waveguide(s) 2810 and a wireless device 2815 . The inductive power module 2805 and the waveguide 2810 can be integrated or otherwise physically connected to each other. The inductive power module 2805 , the waveguide 2810 and the wireless device 2815 can be coupled by way of a cable 2820 for providing communications and/or power.
Inductive power module 2805 can include various features (e.g., features describes with respect to communication devices 2600 and 2700 ) to facilitate obtaining, regulating and/or controlling power (via an inductive coupling with the transmission medium 1930 ), such as housing portions, core portions, a secondary winding, a moveable or pivotal connection, a compressible material, a chargeable battery, a voltage rectifier and/or spike suppression circuit, a circuit board and so forth. Waveguide 2810 (two of which are shown but in one or more embodiments a single surface waveguide can also be utilized) can include various features described herein (e.g., features described with respect to FIGS. 18A-18J ) to facilitate communications by electromagnetic waves guided by the transmission medium 1930 , such as a transceiver, radiating element(s), a dielectric coupler, various circuit components (e.g., MMICs), and so forth. Wireless device 2815 can include various features described herein (e.g., features described with respect to FIG. 29A ) to facilitate wireless communications, such as a transceiver, a feed point, a dielectric antenna, various circuit components, and so forth. Cable 2820 can include various features described herein (e.g., features described with respect to FIGS. 30A-30C ) to facilitate providing communications and/or power between the inductive power module 2805 , the surface waveguide 2810 and the wireless device 2815 , such as a dielectric core, cladding, outer jacket, and so forth
In one or more embodiments, the inductive power module 2805 and the waveguide(s) 2810 can be physically connected to the transmission medium 1930 , such as through use of a separable core as described herein. In one or more embodiments, the wireless device 2815 can be coupled to a support structure 2850 , such as a pole that supports the transmission medium 1930 . In one or more embodiments, communications can be provided by the communication device 2800 by way of the waveguide(s) 2810 and/or by way of the wireless device 2815 . As an example, the surface waveguide 2810 can provide or receive electromagnetic waves at a physical interface of the transmission medium 1930 that propagate without utilizing an electrical return path, where the electromagnetic waves are guided by the transmission medium. Continuing with this example, a wireless signal can be radiated from a dielectric antenna of the wireless device 2815 in response to electromagnetic waves being received at a feed point of the dielectric antenna via a dielectric core of the cable 2820 . In one or more embodiments, the wireless device 2815 can receive wireless signals that are used in generating electromagnetic waves provided to the dielectric core of the cable 2820 . In one or more embodiments, communication device 2800 allows for selective use of different techniques of communication (wireless or guided by the transmission medium 1930 ).
Turning now to FIGS. 29A and 29B , block diagrams illustrating example, non-limiting embodiments of a dielectric antenna and corresponding gain and field intensity plots in accordance with various aspects described herein are shown. FIG. 29A depicts a dielectric horn antenna 2991 having a conical structure. The dielectric horn antenna 2991 is coupled to a feed point 2992 , which can also be comprised of a dielectric material. In one embodiment, for example, the dielectric horn antenna 2991 and the feed point 2992 can be constructed of dielectric materials such as a polyethylene material, a polyurethane material or other suitable dielectric material (e.g., a synthetic resin, other plastics, etc.). In an embodiment, the dielectric horn antenna 2991 and the feed point 2992 can be adapted to be substantially or entirely devoid of any conductive materials. For example, the external surfaces 2997 of the dielectric horn antenna 2991 and the feed point 2992 can be non-conductive substantially non-conductive with at least 95% of the external surface area being non-conductive and the dielectric materials used to construct the dielectric horn antenna 2991 and the feed point 2992 can be such that they substantially do not contain impurities that may be conductive (e.g., such as less than 1 part per thousand) or result in imparting conductive properties. In other embodiments however, a limited number of conductive components can be used such as a metallic connector component used at the feed point 2992 , one or more screw, rivets or other coupling elements used to bind components to one another, and/or one or more structural elements that do not significantly alter the radiation pattern of the dielectric antenna.
The feed point 2992 can be adapted to couple to a core 2952 . In one embodiment, the feed point 2992 can be coupled to the core 2952 utilizing a joint (not shown in FIG. 29A ) such as a splicing device. Other embodiments for coupling the feed point 2992 to the core 2952 can be used. In an embodiment, the joint can be configured to cause the feed point 2992 to touch an endpoint of the core 2952 . In another embodiment, the joint can create a gap between the feed point 2992 and the endpoint of the core 2952 . In yet another embodiment, the joint can cause the feed point 2992 and the core 2952 to be coaxially aligned or partially misaligned. Notwithstanding any combination of the foregoing embodiments, electromagnetic waves can in whole or at least in part propagate between the junction of the feed point 2992 and the core 2952 .
The cable 2950 can be coupled to a waveguide system configured to select a wave mode (e.g., non-fundamental wave mode, fundamental wave mode, a hybrid wave mode, or combinations thereof as described earlier) and transmit instances of electromagnetic waves having a non-optical operating frequency (e.g., 60 GHz). The electromagnetic waves can be directed to an interface of the cable 2950 .
The instances of electromagnetic waves generated by the waveguide system can induce a combined electromagnetic wave having the selected wave mode that propagates from the core 2952 to the feed point 2992 . The combined electromagnetic wave can propagate partly inside the core 2952 and partly on an outer surface of the core 2952 . Once the combined electromagnetic wave has propagated through the junction between the core 2952 and the feed point 2992 , the combined electromagnetic wave can continue to propagate partly inside the feed point 2992 and partly on an outer surface of the feed point 2992 . In some embodiments, the portion of the combined electromagnetic wave that propagates on the outer surface of the core 2952 and the feed point 2992 is small. In these embodiments, the combined electromagnetic wave can be said to be guided by and tightly coupled to the core 2952 and the feed point 2992 while propagating longitudinally towards the dielectric antenna 2991 .
When the combined electromagnetic wave reaches a proximal portion of the dielectric antenna 2991 (at a junction 2992 ′ between the feed point 2992 and the dielectric antenna 2991 ), the combined electromagnetic wave enters the proximal portion of the dielectric antenna 2991 and propagates longitudinally along an axis of the dielectric antenna 2991 (shown as a hashed line). By the time the combined electromagnetic wave reaches the aperture 2993 , the combined electromagnetic wave has an intensity pattern similar to the one shown in FIG. 29B . The electric field intensity pattern of FIG. 29B shows that the electric fields of the combined electromagnetic waves are strongest in a center region of the aperture 2993 and weaker in the outer regions. In an embodiment, where the wave mode of the electromagnetic waves propagating in the dielectric antenna 2991 is a hybrid wave mode (e.g., HE 11 ), the leakage of the electromagnetic waves at the external surfaces 2997 is reduced or in some instances eliminated
In an embodiment, the far field antenna gain pattern depicted in FIG. 29B can be widened by decreasing the operating frequency of the combined electromagnetic wave. Similarly, the gain pattern can be narrowed by increasing the operating frequency of the combined electromagnetic wave. Accordingly, a width of a beam of wireless signals emitted by the aperture 2993 can be controlled by configuring the waveguide system to increase or decrease the operating frequency of the combined electromagnetic wave.
The dielectric antenna 2991 of FIG. 29A can also be used for receiving wireless signals. Wireless signals received by the dielectric antenna 2991 at the aperture 2993 induce electromagnetic waves in the dielectric antenna 2991 that propagate towards the feed point 2992 . The electromagnetic waves continue to propagate from the feed point 2992 to the core 2952 . In this configuration, the waveguide system can perform bidirectional communications utilizing the dielectric antenna 2991 . It is further noted that in some embodiments the core 2952 of the cable 2950 (shown with dashed lines) can be configured to be collinear with the feed point 2992 to avoid a bend shown in FIG. 29A . In some embodiments, a collinear configuration can reduce an alteration of the electromagnetic due to the bend in cable 2950 .
In one or more embodiments, the cable can include a dielectric core covered by a shell, and the wireless signal radiates from an aperture of the dielectric antenna. In one or more embodiments, the dielectric antenna has substantially or entirely no conductive external surfaces, and the dielectric antenna has a composition that is substantially or entirely devoid of conductive materials. In one or more embodiments, the dielectric core is opaque, thereby resistant to propagation of electromagnetic waves having an optical operating frequency. In one or more embodiments, the shell comprises a dielectric layer disposed on the dielectric core. In one or more embodiments, the dielectric core comprises a first dielectric constant, where the shell comprises a second dielectric constant, and where the first dielectric constant exceeds the second dielectric constant to enable the electromagnetic waves to be bound to the dielectric core. In one or more embodiments, the dielectric antenna comprises a high density dielectric material. In one or more embodiments, the high density dielectric material comprises a high density polyethylene material, a high density polyurethane material, or a synthetic resin.
In one or more embodiments, the cross-sections of the dielectric feed point and the dielectric core have similar dimensions. In one or more embodiments, the shell comprises a low density dielectric material. In one or more embodiments, the low density dielectric material comprises an expanded polyethylene material. In one or more embodiments, the transmitter comprises a slotted waveguide for inducing the electromagnetic waves guided by the dielectric core. In one or more embodiments, the transmitter comprises a microwave circuit coupled to an antenna and a waveguide structure for inducing the electromagnetic waves guided by the dielectric core. In one or more embodiments, the transmitter is configured to perform waveform adjustments to the wireless signal radiated by the dielectric antenna. In one or more embodiments, the electromagnetic waves have a hybrid wave mode. In one or more embodiments, the dielectric antenna has a horn structure. In one or more embodiments, the dielectric antenna has a pyramidal structure.
Turning now to FIG. 30A , a block diagram illustrating an example, non-limiting embodiment of a transmission medium 3000 for propagating guided electromagnetic waves is shown. Transmission medium 3000 can be utilized as cable 2820 in communication device 2800 . In particular, a further example of transmission medium 125 presented in conjunction with FIG. 1 is presented. In an embodiment, the transmission medium 3000 can comprise a first dielectric material 3002 and a second dielectric material 3004 disposed thereon. In an embodiment, the first dielectric material 3002 can comprise a dielectric core (referred to herein as dielectric core 3002 ) and the second dielectric material 3004 can comprise a cladding or shell such as a dielectric foam that surrounds in whole or in part the dielectric core (referred to herein as dielectric foam 3004 ). In an embodiment, the dielectric core 3002 and dielectric foam 3004 can be coaxially aligned to each other (although not necessary). In an embodiment, the combination of the dielectric core 3002 and the dielectric foam 3004 can be flexed or bent at least by 45 degrees without damaging the materials of the dielectric core 3002 and the dielectric foam 3004 . In an embodiment, an outer surface of the dielectric foam 3004 can be further surrounded in whole or in part by a third dielectric material 3006 , which can serve as an outer jacket (referred to herein as jacket 3006 ). The jacket 3006 can prevent exposure of the dielectric core 3002 and the dielectric foam 3004 to an environment that can adversely affect the propagation of electromagnetic waves (e.g., water, soil, etc.).
The dielectric core 3002 can comprise, for example, a high density polyethylene material, a high density polyurethane material, or other suitable dielectric material(s). The dielectric foam 3004 can comprise, for example, a cellular plastic material such an expanded polyethylene material, or other suitable dielectric material(s). The jacket 3006 can comprise, for example, a polyethylene material or equivalent. In an embodiment, the dielectric constant of the dielectric foam 3004 can be (or substantially) lower than the dielectric constant of the dielectric core 3002 . For example, the dielectric constant of the dielectric core 3002 can be approximately 2.3 while the dielectric constant of the dielectric foam 3004 can be approximately 1.15 (slightly higher than the dielectric constant of air).
The dielectric core 3002 can be used for receiving signals in the form of electromagnetic waves from a launcher or other coupling device described herein which can be configured to launch guided electromagnetic waves on the transmission medium 3000 . In one embodiment, the transmission 3000 can be coupled to a hollow waveguide 3008 structured as, for example, a circular waveguide 3009 , which can receive electromagnetic waves from a radiating device such as a stub antenna (not shown). The hollow waveguide 3008 can in turn induce guided electromagnetic waves in the dielectric core 3002 . In this configuration, the guided electromagnetic waves are guided by or bound to the dielectric core 3002 and propagate longitudinally along the dielectric core 3002 . By adjusting electronics of the launcher, an operating frequency of the electromagnetic waves can be chosen such that a field intensity profile 3010 of the guided electromagnetic waves extends nominally (or not at all) outside of the jacket 3006 .
By maintaining most (if not all) of the field strength of the guided electromagnetic waves within portions of the dielectric core 3002 , the dielectric foam 3004 and/or the jacket 3006 , the transmission medium 3000 can be used in hostile environments without adversely affecting the propagation of the electromagnetic waves propagating therein. For example, the transmission medium 3000 can be buried in soil with no (or nearly no) adverse effect to the guided electromagnetic waves propagating in the transmission medium 3000 . Similarly, the transmission medium 3000 can be exposed to water (e.g., rain or placed underwater) with no (or nearly no) adverse effect to the guided electromagnetic waves propagating in the transmission medium 3000 . In an embodiment, the propagation loss of guided electromagnetic waves in the foregoing embodiments can be 1 to 2 dB per meter or better at an operating frequency of 60 GHz. Depending on the operating frequency of the guided electromagnetic waves and/or the materials used for the transmission medium 3000 other propagation losses may be possible. Additionally, depending on the materials used to construct the transmission medium 3000 , the transmission medium 3000 can in some embodiments be flexed laterally with no (or nearly no) adverse effect to the guided electromagnetic waves propagating through the dielectric core 3002 and the dielectric foam 3004 .
FIG. 30B depicts a transmission medium 3020 that differs from the transmission medium 3000 of FIG. 30A , yet provides a further example of the transmission medium 125 presented in conjunction with FIG. 1 . The transmission medium 3020 shows similar reference numerals for similar elements of the transmission medium 3000 of FIG. 30A . In contrast to the transmission medium 3000 , the transmission medium 3020 comprises a conductive core 3022 having an insulation layer 3023 surrounding the conductive core 3022 in whole or in part. The combination of the insulation layer 3023 and the conductive core 3022 will be referred to herein as an insulated conductor 3025 . In the illustration of FIG. 30B , the insulation layer 3023 is covered in whole or in part by a dielectric foam 3004 and jacket 3006 , which can be constructed from the materials previously described. In an embodiment, the insulation layer 3023 can comprise a dielectric material, such as polyethylene, having a higher dielectric constant than the dielectric foam 3004 (e.g., 2.3 and 1.15, respectively). In an embodiment, the components of the transmission medium 3020 can be coaxially aligned (although not necessary). In an embodiment, a hollow waveguide 3008 having metal plates 3009 , which can be separated from the insulation layer 3023 (although not necessary) can be used to launch guided electromagnetic waves that substantially propagate on an outer surface of the insulation layer 3023 , however other coupling devices as described herein can likewise be employed. In an embodiment, the guided electromagnetic waves can be sufficiently guided by or bound by the insulation layer 3023 to guide the electromagnetic waves longitudinally along the insulation layer 3023 . By adjusting operational parameters of the launcher, an operating frequency of the guided electromagnetic waves launched by the hollow waveguide 3008 can generate an electric field intensity profile 3024 that results in the guided electromagnetic waves being substantially confined within the dielectric foam 3004 thereby preventing the guided electromagnetic waves from being exposed to an environment (e.g., water, soil, etc.) that adversely affects propagation of the guided electromagnetic waves via the transmission medium 3020 .
FIG. 30C depicts a transmission medium 3030 that differs from the transmission mediums 3000 and 3020 of FIGS. 30A and 30B , yet provides a further example of the transmission medium 125 presented in conjunction with FIG. 1 . The transmission medium 3030 shows similar reference numerals for similar elements of the transmission mediums 3000 and 3020 of FIGS. 30A and 30B , respectively. In contrast to the transmission mediums 3000 and 3020 , the transmission medium 3030 comprises a bare (or uninsulated) conductor 3032 surrounded in whole or in part by the dielectric foam 3004 and the jacket 3006 , which can be constructed from the materials previously described. In an embodiment, the components of the transmission medium 3030 can be coaxially aligned (although not necessary). In an embodiment, a hollow waveguide 3008 having metal plates 3009 coupled to the bare conductor 3032 can be used to launch guided electromagnetic waves that substantially propagate on an outer surface of the bare conductor 3032 , however other coupling devices described herein can likewise be employed. In an embodiment, the guided electromagnetic waves can be sufficiently guided by or bound by the bare conductor 3032 to guide the guided electromagnetic waves longitudinally along the bare conductor 3032 . By adjusting operational parameters of the launcher, an operating frequency of the guided electromagnetic waves launched by the hollow waveguide 3008 can generate an electric field intensity profile 3034 that results in the guided electromagnetic waves being substantially confined within the dielectric foam 3004 thereby preventing the guided electromagnetic waves from being exposed to an environment (e.g., water, soil, etc.) that adversely affects propagation of the electromagnetic waves via the transmission medium 3030 .
It should be noted that the hollow launcher 3008 used with the transmission mediums 3000 , 3020 and 3030 of FIGS. 30A, 30B and 30C , respectively, can be replaced with other launchers or coupling devices. Additionally, the propagation mode(s) of the electromagnetic waves for any of the foregoing embodiments can be fundamental mode(s), a non-fundamental (or asymmetric) mode(s), or combinations thereof.
Turning now to FIGS. 31A and 31B , schematic block diagrams 3100 and 3125 of example, non-limiting embodiments of a communication coupling circuit or device in accordance with various aspects described herein, are shown. These communication coupling circuit can be utilized by one or more of the communication devices described herein to transmit or receive electromagnetic waves guided by the transmission medium 1930 . These communication coupling circuits can be integrated with the communication devices described herein that obtain power via an inductive coupling with the transmission medium 1930 and/or that are physically connected with the transmission medium by way of various connection mechanisms (e.g., a hinge and separable core). In particular, further embodiments are described of coupling device 220 presented in conjunction with FIG. 2 . Considering FIG. 31A , a transmission device, such as transmission device 101 or 102 presented in conjunction with FIGS. 1-2 , includes a transceiver 3110 that generates a signal. A communication coupling circuit receives and couples the signal to the capacitors 3104 and 3106 . The capacitors 3104 and 3106 are passive electrical circuit elements that generate an electromagnetic field in response to the signal between the plates of each capacitor. As used herein, a passive electrical circuit element is an electrical component that does not generate power, but instead dissipates, stores, and/or releases it as part of an electrical circuit. Passive elements include resistors/resistances, capacitors, and inductors. As used herein, passive electrical circuit elements do not include wave guides or antennas.
In addition to the operation of the capacitors 3104 and 3106 as part of a communication coupling circuit with a section of the transmission medium 1930 , a portion of the electromagnetic field generated by each capacitor is bound to or guided by an outer surface of a transmission medium 1930 to propagate as a guided electromagnetic wave 3120 longitudinally along the transmission medium 1930 in the direction 3122 and/or 3124 . In this case, while the wire may carry some current as part of the circuit, it also operates as an object to guide the guided electromagnetic wave 3120 along the surface of the wire, as for example, a single wire transmission medium. In the embodiment shown, the capacitors 3104 and 3106 are spaced a distance d apart that corresponds to substantially one quarter of the wavelength of the signal, to facilitate the coupling of the signal to the transmission medium 1930 as a guided electromagnetic wave 3120 .
As used herein substantially one quarter wavelength means an effective length that varies from a quarter wavelength by 25% or less. It is noted that the graphical representations of guided waves are presented merely to illustrate an example of guided-wave coupling and propagation. The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on the frequencies employed, the design and/or configuration of the coupling device, the dimensions and composition of the transmission medium 1930 , as well as its surface characteristics and the electromagnetic properties of the surrounding environment, etc. In particular, the guided electromagnetic wave can propagate via a fundamental guided wave mode and/or at least one non-fundamental guided wave mode. In various embodiments the electromagnetic waves can have a carrier frequency in the 300 MHz-3 GHz band, however, higher or lower frequencies could likewise be employed including, but not limited to, other microwave frequencies.
While the description above has focused on the operation of a coupling device in transmission for launching a guided wave 3120 on a transmission medium 1930 , the same coupler design can be used in reception for extracting a guided wave from the transmission medium 1930 that, for example, was sent by a remote transmission device. In this mode of operation, the coupling device decouples a portion of a guided electromagnetic wave, conveying data from a transmitting device, that is bound to or guided by an outer surface of the transmission medium 1930 and propagating longitudinally along the transmission medium 1930 in the opposite direction of 3122 . In reciprocal fashion to transmission, the capacitors 3104 and 3106 can operate to receive at least a portion of the guided electromagnetic wave and provide it to transceiver 3110 or other receiver.
Considering FIG. 31B , a coupling device is shown that includes many similar features described in conjunction with FIG. 31A that are referred to by common reference numerals. In this embodiment, one capacitor (like capacitor 3104 from FIG. 31A ) is formed by a plate 3154 placed in proximity to the transmission medium/wire 3102 and another capacitor (like capacitor 3106 from FIG. 31A ) is formed by a plate 3156 placed in proximity to the transmission medium/wire 1930 . These capacitors optionally include dielectrics 3164 and 3166 , such as polystyrene, polyethylene, Teflon, or other dielectric or electrolytic material to, for example, promote electrical insulation between the plates 3154 and 3156 and the transmission medium/wire 1930 in the event that the wire is a bare wire, and optionally to increase the capacitance of the capacitors in the desired frequency band. In an embodiment, insulation on the transmission medium/wire 1930 can act as the dielectrics 3164 and 3166 . It should be noted that while FIGS. 31A and 31B present a circuit with two capacitors, a greater number of capacitors can likewise be employed to launch and/or extract a guided electromagnetic wave.
Turning now to FIGS. 32A and 32B , graphical diagrams 3200 and 3250 of example, non-limiting embodiments of coupling devices in accordance with various aspects described herein, are shown. In particular, common elements from FIGS. 32A and 32B are referred to by common reference numerals. In this embodiment, an inductor 3204 in proximity to the transmission medium 1930 , is used as a passive electrical circuit element as part of a circuit to generate an electromagnetic field in response to the signal from a transceiver 3210 . A portion of the electromagnetic field generated by the inductor is bound by an outer surface of a transmission medium 1930 to propagate as a guided electromagnetic wave 3120 longitudinally along the transmission medium 1930 in the direction 3122 and/or 3124 .
It is noted that the graphical representations of guided waves are presented merely to illustrate an example of guided-wave coupling and propagation. The actual electric and magnetic fields generated as a result of such wave propagation may vary depending on the frequencies employed, the design and/or configuration of the coupling device, the dimensions and composition of the transmission medium 1930 , as well as its surface characteristics and the electromagnetic properties of the surrounding environment, etc. In particular, the guided electromagnetic wave can propagate via a fundamental guided wave mode and/or at least one non-fundamental guided wave mode. In various embodiments the electromagnetic waves can have a carrier frequency in the 300 MHz-3 GHz band, however, higher or lower frequencies could likewise be employed including, but not limited to, other microwave frequencies.
While the description above has focused on the operation of a coupling device in transmission for launching a guided wave 3120 on a transmission medium 1930 , the same coupler design can be used in reception for extracting a guided wave from the transmission medium 1930 that, for example, was sent by a remote transmission device. In this mode of operation, the coupling device decouples a portion of a guided electromagnetic wave, conveying data from a transmitting device, that is bound by an outer surface of the transmission medium 1930 and propagating longitudinally along the transmission medium 1930 in the opposite direction of 3122 . In reciprocal fashion to transmission, the inductor 3204 can operate to receive at least a portion of the guided electromagnetic wave and provide it to transceiver 3210 or other receiver.
Considering FIG. 32B , another example is presented that follows along with the discussion of FIG. 32A . In this example, the inductor 3204 of FIG. 32A is implemented as a toroidal inductor 3252 that circumscribes the transmission medium 1930 , such as a wire shown in cross section. The toroidal inductor 3252 can be constructed of multiple turns of wire wrapped around an annular toroid of powdered iron or other ferrite. In the case where the transmission medium 1930 is a bare wire, a dielectric washer or other insulator 3254 can provide electrical insulation while supporting the wire within the toroidal inductor 3252 . Such a dielectric washer can be constructed of Teflon, polystyrene, polyethylene or other dielectric or insulating material. In cases where the transmission medium 1930 is nonconductive or includes an insulating sheath or jacket, the dielectric washer can be eliminated.
While the transmission medium 1930 has been primarily discussed as including a wire, such as an insulated wire or cable or an uninsulated wire, transmission medium 1930 can include any of the transmission media 125 previously described. It should be noted that while FIGS. 32A and 32B present a circuit with only one inductor, a greater number of inductors can likewise be spaced along the transmission medium 1930 to launch and/or extract a guided electromagnetic wave.
Turning now to FIG. 33 , a flow diagram of an example, non-limiting embodiment of a method 3300 , is shown. In particular, a method is presented for use with one or more functions and features presented in conjunction with FIGS. 1-32B and is described with respect to powering a communication device that can include a waveguide. At 3302 , an inductive power module can obtain power, for a communication device, from a current passing through a transmission medium via an inductive coupling between the communication device and the transmission medium. The communication device can be physically connected with the transmission medium. At 3304 , the communication device can provide communications by electromagnetic waves that propagate without utilizing an electrical return path. The electromagnetic waves can be guided by one of the transmission medium or a dielectric core of a cable coupled to a feed point of a dielectric antenna. In other embodiments, the electromagnetic waves can be guided by a coaxial cable or waveguide.
While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIG. 33 , it is to be understood and appreciated that the claimed subject matter is not limited to the particular blocks and other blocks may be utilized with the method described herein.
Referring to FIG. 34 , a system 3400 is illustrated in which placement information can be generated or otherwise obtained that is indicative of a target location for deploying or otherwise positioning a communication device. The placement information can be based on various information collected from transmitting and/or receiving wireless signals to and/or from various target locations, such as collecting RF parameters associated with the wireless signals. The placement information can include other information associated with signal transmitting and/or receiving, such as line of sight information, interference information, and so forth. The placement information can be generated and/or presented in various formats, such as a received signal strength map for various target locations where the signals are associated with various different locations.
In one or more embodiments, an unmanned aircraft(s) 3410 can be utilized to facilitate collecting data such as signal parameters. For example, a receive unmanned aircraft 3410 A can be flown to various target positions that are to be evaluated for placement of a communication device. In one embodiment, the communication device can be a waveguide device that is to be physically connected with or in proximity to a transmission medium 1930 , such as a wire suspended along poles. The waveguide device can provide communications by way of electromagnetic waves that are guided by the transmission medium and/or by way of wireless signals, such as through use of a dielectric antenna. As shown in FIG. 34 , a path 3411 of the receive unmanned aircraft 3410 A is depicted as it flies in proximity to the transmission medium 1930 . The target locations for the communication device can be at other locations that are not in proximity to a transmission medium, such as at a support structure, a building, an open area, a road, and so forth.
In one or more embodiments, the receive unmanned aircraft 3410 A can collect and store the data (e.g., RF parameters indexed to target locations and/or different transmitting locations). The data can then be retrieved from the receive unmanned aircraft 3410 A, such as by obtaining the data when the receive unmanned aircraft 3410 A returns from flight. In another embodiment, data exchange can occur at other times, such as during flight. In one embodiment, the analysis of the data and generation of the placement information, such as an RF receive signal strength map, a coverage map, an interference map and/or other reports indicative of the placement information can be generated by another device.
In one or more embodiments, a vehicle 3430 can accompany the receive unmanned aircraft 3410 A to facilitate collecting the signal parameters. For instance, the vehicle 3430 can wirelessly receive the collected data from the receive unmanned aircraft 3410 A (or obtain the data when the receive unmanned aircraft returns from flight) and process the data, such as generating receive signal strength maps for various locations along the transmission medium 1930 . In another embodiment, the vehicle 3430 can include a control device that provides control signals to the unmanned aircraft 3410 A that enable the unmanned aircraft to fly in proximity to the transmission medium. The unmanned aircraft 3410 A has the ability to fly with sufficient stability to reach target positions along the transmission medium 1930 . The use of the unmanned aircraft 3410 A enables obtaining signal parameters for a target location(s) without requiring bucket trucks or other provider equipment that is often required for reaching difficult areas. The unmanned aircraft 3410 A has the ability to ascend and descend at these difficult-to-reach areas so that the target locations also can vary as to altitude.
In one or more embodiments, the unmanned aircraft 3410 A can communicate directly with a remote control device for operational control (e.g., flight, capturing images, navigational data, and so forth) and can utilize a different wireless communication for providing the collected data, such as wirelessly transmitting the collected data from the unmanned aircraft 3410 A to a receiver utilizing network communications, such as a cellular network, a wireless device physically connected with or in proximity to the transmission medium 1930 , and so forth.
At the various target locations, the receive unmanned aircraft 3410 A can receive wireless test signals. The test signals can be received from different locations, such as transmitters located at or in buildings 3404 , base stations 3406 , or other locations. In one embodiment, one or more other unmanned aircrafts 3410 B can be used for transmitting the test signals from the different locations, such as in proximity to buildings 3404 . In one or more embodiments, a combination of testing signals transmitted from unmanned aircraft 3410 B and transmitted from other transmitters can be used for the different locations, such as where certain locations already have a transmitter in place (e.g., older buildings) and other locations do not have a transmitter in place (e.g., buildings under construction). In one or more embodiments, the unmanned aircraft 3410 A can transmit one or more test signals towards various locations (e.g., base stations, premises, other unmanned aircrafts, and so forth). These test signals can be analyzed, such as for receive signal strength, to determine positioning information, such as along the transmission medium 1930 .
Referring to FIG. 35 , an RF receive signal strength map 3500 is shown in which placement information is generated from collected data for a group of different locations that are transmitting test signals (e.g., buildings 3404 ) and is indicated in a signal strength bar 3550 . The data can be collected according to the techniques and utilizing the devices described in system 3400 of FIG. 34 . The signal strength bar 3550 can be superimposed or otherwise presented in conjunction with a geographic map of the area (e.g., showing the buildings 3404 , the transmission medium 1930 , roads, poles, and so forth and/or a schematic representation thereof). The different shading on the signal strength bar 3550 can represent different signal strengths, average signal strengths or some derived or derivate value associated with signal strengths from one, some or all of the locations (e.g., buildings 3404 ). As an example, a derivative value can include or otherwise take into account an interfering signal or a combination of interfering signals. Positions along the transmission medium 1930 can correspond to positions along the signal strength bar 3550 , such as target position X corresponding to the shading of X′ on the signal strength bar. Various techniques and components can be used for determining the RF receive signal strength such as RSSI measurements.
Referring to FIG. 36 , a line of sight map 3600 is shown in which placement information is generated from collected data for a group of different locations and is indicated in a line of sight bar 3650 . The data can be collected according to the techniques and utilizing the devices described in system 3400 of FIG. 34 . The line of sight bar 3650 can be superimposed or otherwise presented in conjunction with a geographic map of the area (e.g., showing the buildings 3404 , the transmission medium 1930 , roads, poles, and so forth and/or a schematic representation thereof). The different numbers on the line of sight bar 3550 can represent the number of different locations (e.g., buildings) where there is an unobstructed line of sight between the target location (proposed positioning of the communication device) and the particular location (e.g., buildings 3404 ). Positions along the transmission medium 1930 can correspond to positions along the line of sight bar 3650 , such as target position Y corresponding to the number for Y′ on the line of sight bar. In this example, the line of sight information can be obtained by capturing images, such as images captured in a direction from the target location to each of the different locations (e.g., buildings) or captured in the opposite direction. Other techniques can be utilized to determine if there are any physical structures, such as other buildings, trees, towers, walls, and so forth that obstruct the line of sight between the target location and the different locations, such as sonar, radar and so forth. In one embodiment, the line of sight map 3600 can be superimposed or otherwise combined with the RF receive signal strength map 3500 to indicate signal strength and line of sight data on a single map.
Referring to FIG. 37 , a coverage map 3700 is shown in which placement information is generated from collected data for a group of different locations and is indicated for each of the different locations (e.g., buildings 3404 ), such as through shading. The data can be collected according to the techniques and utilizing the devices described in system 3400 of FIG. 34 . In this example, each of the buildings can be shaded to represent a signal strength(s) associated with a testing signal(s), including average received signal strength. The testing signal can be transmitted from a wireless device 3710 to a receiver at the location or can be received by the wireless device 3710 from a transmitter at the location. The coverage map 3700 can indicate received signal strength for test signals received at the building 3404 (or other locations) and/or received signal strength for test signals transmitted from the building 3404 (or other locations) that are received by a receiver (e.g., at the transmission medium or at some other proposed locations for the communication device). Obstacles, distance and other factors can affect the signal strength of the testing signal. In one embodiment, the wireless device 3710 is positioned in proximity to the transmission medium 1930 and can be physically connected thereto. In another embodiment, the wireless device 3710 can receive power via an inductive coupling with the transmission medium 1930 .
Referring to FIG. 38 , a system and vertical map 3800 is shown in which placement information is generated from collected data for a group of different locations that are transmitting test signals (e.g., buildings 3404 ) and is indicated in a signal strength bar 3850 and a line of sight bar 3855 . The data can be collected according to the techniques and utilizing the devices described in system 3400 of FIG. 34 , such as measuring received signal strength utilizing the receive unmanned aircraft 3410 A which moves vertically along path 3805 at a particular location of the transmission medium. The placement information can be generated based on different vertical positions. In one or more embodiments, data can be collected for a number of vertical positions corresponding to a single target location or corresponding to a number of target locations, such as a number of vertical positions for a particular mid-span of a transmission medium between two particular poles. The signal strength bar 3850 can be superimposed or otherwise presented in conjunction with a support structure 3860 (e.g., a pole) representing the various vertical positions. The different shadings on the signal strength bar 3850 can represent different signal strengths, average signal strengths or some derived or derivate values associated with signal strengths from one, some or all of the locations (e.g., buildings 3404 ). Vertical positions along the support structure 3860 can correspond to positions along the signal strength bar 3850 . Various techniques and components can be used for determining the RF receive signal strength such as RSSI measurements.
Vertical map 3800 can also include the line of sight bar 3855 which is based on data collected according to the techniques and utilizing the devices described in system 3400 of FIG. 34 . The different numbers on the line of sight bar 3855 can represent the number of different locations (e.g., buildings) where there is an unobstructed line of sight between the target location and the particular location (e.g., a building). In one or more embodiments, the map 3800 can facilitate quantifying a performance difference between a utility space and a telecom space on a pole based on RF parameters and the surrounding environment.
Referring to FIG. 39 , a system 3900 is illustrated in which placement information can be generated or otherwise obtained that is indicative of a target location for deploying or placement of a communication device, such as customer premises equipment. The placement information can be based on various information collected from transmitting and/or receiving wireless signals to and/or from various target locations, such as collecting RF parameters associated with the wireless signals. The placement information can include other information associated with signal transmitting and/or receiving, such as interference information. The placement information can be generated and/or presented in various formats, such as a received signal strength map for various target locations.
In one or more embodiments, the receive unmanned aircraft 3410 A can be utilized to facilitate collecting data such as signal parameters, where the receive unmanned aircraft can be flown to various target positions that are to be evaluated for placement of the communication device, such as positions outside of and/or inside of the building 3404 . In one embodiment, the receive unmanned aircraft 3410 A can receive wireless signals from a transmitter, such as one that is physically connected with a transmission medium or in proximity thereto. The communication device to be positioned at or in the building 3404 can be various types of devices including an antenna, a dielectric antenna, a femtocell device, a picocell device, and so forth. As shown in FIG. 39 , a path 3911 of the receive unmanned aircraft 3410 A is depicted as it flies in proximity to the building 3404 (or within the building) where it can be receiving and analyzing test signals that are received at various points along the path 3911 . The use of the unmanned aircraft 3410 A enables obtaining signal parameters for target locations without requiring bucket trucks or other provider equipment that is often required for reaching difficult areas. The unmanned aircraft 3410 A has the ability to ascend and descend at these difficult-to-reach areas so that the target locations also can vary as to altitude. In one or more embodiments, the receive unmanned aircraft 3410 A can receive wireless test signals that are being transmitted from other unmanned aircrafts, base stations, wireless transmitters physically connected with a transmission medium, or other locations.
Referring to FIG. 40 , an RF receive signal strength map 4000 is shown in which placement information is generated from collected data for a group of different locations receiving test signals (e.g., outside or inside of a building 3404 ). The data can be collected according to the techniques and utilizing the devices described in system 3900 of FIG. 39 . The map 4000 can include an image or a schematic representation of a premises, building, road, support structure, or other area that is to receive a communication device. The different shading along different parts of the building 3404 can represent different signal strengths, average signal strengths or some derivate values associated with signal strengths for test signals being received from a transmitter (e.g., a wireless transmitter in proximity to a transmission medium, a base station, and so forth). Various techniques and components can be used for determining the RF receive signal strength such as RSSI measurements.
Referring to FIG. 41 , a system 4100 is illustrated in which placement information can be generated or otherwise obtained that is indicative of a target location for a communication device. The placement information can be based on various information collected from transmitting and/or receiving wireless signals to and/or from various target locations, such as collecting RF parameters associated with the wireless signals. The placement information can include other information associated with signal transmitting and/or receiving, such as Signal-to-Noise ratio data, interference information, line of sight or detection information for cells or base stations, cell identification, sector identification, other cell parameters, and so forth. The placement information can be generated and/or presented in various formats, such as an interference map for various target locations where the signals are associated with various base stations and/or various target locations along a transmission medium 1930 .
In one or more embodiments, the receive unmanned aircraft 3410 A can collect data as it is flown to various target locations that are to be evaluated for placement of the communication device. In one embodiment, the communication device can be a waveguide device that is to be physically connected with or in proximity to the transmission medium 1930 , such as a wire suspended along poles. The waveguide device can provide communications by way of electromagnetic waves that are guided by the transmission medium and/or by way of wireless signals, such as through use of a dielectric antenna. As shown in FIG. 41 , a path 4111 of the receive unmanned aircraft 3410 A is depicted as it flies in proximity to the transmission medium 1930 . As described with respect to system 3400 of FIG. 34 , a vehicle 3430 can accompany the receive unmanned aircraft 3410 A to facilitate collecting the signal parameters and/or facilitate controlling the receive unmanned aircraft. At the various target locations, the receive unmanned aircraft 3410 A can receive wireless test signals transmitted from base station(s) 4150 . In one or more embodiments, interference measurements can be made according to interference between base stations, such as interference caused by base station 4150 ′.
The unmanned aircraft 3410 illustrated in FIGS. 34, 38, 39 and 41 can be controlled based on user input received from a control device, such as a remote control device of an operator (e.g., inside of or outside of a vehicle). Referring to FIG. 42 , the unmanned aircraft 3410 can also fly utilizing a guidance assist system 4200 . For example, the unmanned aircraft 3410 can follow a line “sag” by a set amount (e.g., 6 feet), such as using radar (e.g., a 60 GHz RF “Proximity Radar”). Using image pattern recognition via an optical camera, utilizing real-time video with visual inspection, and so forth. In one embodiment, the unmanned aircraft 3410 can utilize this technique to locate a mid-span or other pre-determined span for placement of a communication device (e.g., a waveguide) that is to be physically connected with a transmission medium 1930 . Data collection can be performed at this pre-determined position along the transmission medium 1930 . In one embodiment, an operator can maintain line-of-sight operation of the unmanned aircraft 3410 while not requiring close coordination from the operator since the guidance system is being utilized (e.g., the operator in a vehicle does not need to follow the unmanned aircraft down a street that is still within line-of-sight). This example can be utilized to comply with particular UAS rules or regulations. In one or more embodiments, the unmanned aircraft can be flown under non-line-of-sight conditions, such as where current or future UAS rules or regulations permit such operations.
Turning now to FIG. 43 , a flow diagram of an example, non-limiting embodiment of a method 4300 , is shown. In particular, a method is presented for use with one or more functions and features presented in conjunction with FIGS. 1-42 and is described with respect to collecting data to facilitate deployment or positioning of a communication device that can be a network device or a customer premises equipment.
At 4302 , a first group of test signals can be received when an unmanned aircraft is at a first position (e.g., in proximity to a transmission medium). The first group of test signals can be transmitted from different locations. At 4304 , a second group of test signals can be received when the unmanned aircraft is at a second position (e.g., in proximity to the transmission medium). The second group of test signals can be transmitted from the different locations. At 4306 , a first RF parameter associated with each of the first group of test signals and a second RF parameter associated with each of the second group of test signals can be determined. In one or more embodiments, an optimization algorithm can be applied to the placement information data. At 4308 , placement information indicative of a target location for a communication device to be connected along the transmission medium can be generated. The placement information can be generated based on the first and second RF parameters. Any number of groups of test signals can be collected for any number of different locations when the unmanned aircraft is at any number of target locations. The RF parameters can vary including RSSI measurements. In one or more embodiments, method 4300 can be a continuous process, such as collecting data along a flight path that runs parallel or in proximity to the power line.
While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIG. 43 , it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Moreover, not all illustrated blocks may be required to implement the methods described herein.
Referring to FIG. 44 , a system 4400 is illustrated to facilitate control of an unmanned aircraft 4410 which may be flown to a target area or destination for various reasons, such as described with respect to systems 1900 , 2100 , 3400 , 3900 , 4100 including for deployment of equipment, collecting data, detecting undesired conditions in the network, and so forth.
In one or more embodiments, a remote control device 4420 can communicate directly (e.g., via peer-to-peer communications utilizing various wireless protocols) with the unmanned aircraft 4410 , such as for operational control (e.g., flight, capturing images, navigational data, and so forth) as depicted by arrow 4480 . The communication between the remote control device 4420 and the unmanned aircraft 4410 can be uni-directional or can be bi-directional. As an example, the remote control device 4420 can transmit control signals to the unmanned aircraft 4410 for flight control and/or actuating functions of the unmanned aircraft (e.g., capturing images, capturing RF parameters, releasing a connection with a payload, activating a latching mechanism of a payload, and so forth). The unmanned aircraft 4410 can transmit various information back to the remote control device 4420 , such as navigational data, images, and so forth.
In one or more embodiments, the remote control device 4420 can communicate indirectly with the unmanned aircraft 4410 utilizing intermediary network elements, such as for operational control (e.g., flight, capturing images, navigational data, and so forth) as depicted by arrows 4482 and 4484 . The communication between the remote control device 4420 , the intermediary network elements, and the unmanned aircraft 4410 can be uni-directional or can be bi-directional. As an example, the remote control device 4420 can transmit control signals to a network communication device 4450 (arrow 4482 ) and/or can transmit the control signals to a base station 4475 (arrow 4484 ), such as for flight control and/or actuating functions of the unmanned aircraft. The network communication device 4450 and/or the base station 4475 can wirelessly transmit the control signals to the unmanned aircraft 4410 as depicted by arrows 4486 and 4488 , which can provide for a longer range of communication between the remote control device 4420 and the unmanned aircraft 4410 . Similarly, the unmanned aircraft 4410 can transmit various information back to the remote control device 4420 via the intermediary network element (e.g., network communication device 4450 and/or base station 4475 ), such as navigational data, images, and so forth.
In one or more embodiments, the network communication device 4450 can include a dielectric antenna (e.g., as illustrated in FIG. 29A ) to facilitate communications. In another embodiment, the network communication device 4450 can communicate by electromagnetic waves at a physical interface of a transmission medium, where the electromagnetic waves propagate without utilizing an electrical return path, and where the electromagnetic waves are guided by the transmission medium. For example, the transmission medium can be a power line 1930 that guides the electromagnetic waves towards the base station 4475 . In one embodiment, the power line 1930 can be connected between utility poles. In another embodiment, the power line 1930 can be connected to the base station 4475 . In another embodiment, the transmission medium can be a wire coupling a transmitter of the network communication device 4450 to a dielectric antenna, such as described in FIGS. 28 and 29A .
In one or more embodiments, data downloads can utilize different channels, different wireless protocols and/or different network devices than control signals. As an example, collected data (e.g., RF parameters for test signals transmitted from different locations that are collected by the unmanned aircraft 4410 when it is in proximity to a target area) can be transmitted from the unmanned aircraft 4410 to a server (not shown) or to another recipient device including the remote control device 4420 via the network communication device 4450 and/or via the base station 4475 as depicted by arrows 4490 and 4492 . These communication paths 4490 and 4492 can be uni-directional, such as for downloading data from the unmanned aircraft 4410 , or can be bi-directional, such as for uploading instructions for collecting data, and so forth.
In one or more embodiments, controllers can be utilized that are not human-based. For example, micro-robots can be utilized including a fully automated control of the unmanned aircraft. For instance, micro-robots can crawl the utility poles and/or power lines in order to guide and control the unmanned aircraft into position. They may also provide physical adjustments and/or capture video. In one or more embodiments, materials can be selected to enhance safety, such as a tether or cable which is non-conductive. In one or more embodiments, the unmanned aircraft can be provided with stabilization and may be prevented from flying across power lines and/or prevented from touching multiple places in the power line or be within arcing distances of the power lines. For example, automatic controls or software can be utilized to implement these safety measures when flying the unmanned aircraft, including the unmanned aircraft automatically detecting proximity to the power line and avoiding contact. In one or more embodiments, connectors can be utilized that operate based on a drop and connect procedure. The drop and connect procedure can be utilized by the unmanned aircraft for installing various equipment.
Turning now to FIG. 45 , a flow diagram of an example, non-limiting embodiment of a method 4500 , is shown. In particular, a method is presented for use with one or more functions and features presented in conjunction with FIGS. 1-44 and is described with respect to switching between different communication paths to facilitate controlling an unmanned aircraft.
At 4502 , a processing system of an unmanned aircraft can wirelessly receive first control signals directly from a remote control device, such as according to user input at the remote control device. At 4504 , the processing system can adjust a flight of the unmanned aircraft according to the first control signals. At 4506 , the processing system can wirelessly receive second control signals that are received from a network device (e.g., of a cellular network). The second control signals are not received by the processing system directly from the remote control device. The network device can be various network devices described herein, including a base station, a communication device with a dielectric antenna, a waveguide, and so forth.
At 4508 , the processing system can adjust the flight of the unmanned aircraft according to the second control signals. The second control signals can be implemented at the unmanned aircraft and/or transmitted from the network device responsive to a determination that the first control signals are no longer being received by the processing system. In this example, the first control signals being no longer received by the processing system can include receiving none of the first control signals, or receiving communications representative of the first control signals that do not satisfy a quality threshold or are otherwise deemed unreliable. In one or more embodiments, various authentication or other security procedures can be implemented to ensure that any handover of control is associated with an authorized entity, such as an authorized user, an authorized user device, and so forth. These security procedures can include passwords, encryption, pre-registration, and so forth.
In one or more embodiments, the processing system can wirelessly receive third control signals that are subsequently received directly from the remote control device, such as according to other user input at the remote control device. In one or more embodiments, the processing system can adjust the flight of the unmanned aircraft according to the third control signals to position the unmanned aircraft in proximity to a transmission medium. In one or more embodiments, the unmanned aircraft can include a carrying system that releasably carries a communication device, where a positioning of the communication device in the proximity of the transmission medium enables the communication device to be physically connected on the transmission medium to receive power via an inductive coupling. In one or more embodiments, the flight of the unmanned aircraft can be adjusted according to the third control signals causing the unmanned aircraft to be positioned in proximity to a target area. For instance, a group of test signals can be received by the processing system when the unmanned aircraft is in proximity to the target area, where the group of test signals is transmitted from different locations. An RF parameter associated with each of the group of test signals can be determined by the processing system resulting in RF parameters. Continuing with this example, the RF parameters can be provided to a server that enables the server to generate placement information indicative of a particular position for a communication device to be positioned with respect to the target area, where the placement information is generated based on the RF parameters.
In one or more embodiments, the providing of the RF parameters to a server can include transmitting information representative of the RF parameters to the server via the cellular network from the unmanned aircraft. In one or more embodiments, the RF parameters can be stored in a storage device of the unmanned aircraft, where the providing the RF parameters to the server occurs when the unmanned aircraft returns from the flight and when the unmanned aircraft is positioned within a Faraday cage. In one or more embodiments, the second control signals can be received by the network device from the remote control device, where the network device comprises a transmitter of a base station. In one or more embodiments, a dielectric antenna of a communication device can receive the second control signals directly from the remote control device, where the network device receives the second control signals from the communication device, and where the communication device is physically connected with a transmission medium. In one or more embodiments, the communication device can transmit the second control signals towards the network device by electromagnetic waves at a physical interface of the transmission medium, where the electromagnetic waves propagate without utilizing an electrical return path, and where the electromagnetic waves are guided by the transmission medium. In one or more embodiments, the adjusting of the flight of the unmanned aircraft according to the second control signals can include flying the unmanned aircraft within a transmitting range of the remote control device, where the second control signals are not sourced by the remote control device, such as generating the second control signals automatically to return the unmanned aircraft to a position that enables the unmanned aircraft to be back under the control of the remote control device.
In one or more embodiments, a processing system can determine whether an unmanned aircraft is registered with a network that includes the processing system, such as a registration and authentication process with a radio access network. The processing system can determine whether the unmanned aircraft is receiving first control signals being sourced by a remote control device. In one or more embodiments, responsive to a registration of the unmanned aircraft with the network and/or responsive to a determination that the unmanned aircraft is not receiving the first control signals, the processing system can wirelessly transmit second control signals to the unmanned aircraft via a transmitter of the network. These second control signals can cause a flight of the unmanned aircraft to be adjusted.
In one or more embodiments, a registration of the unmanned aircraft and a registration of an operator (or user) of the unmanned aircraft can be required before enabling the network to provide control signals or other communications to the unmanned aircraft. In one or more embodiments, a server of the network can monitor the flight of the unmanned aircraft and log appropriate information, such as position, altitude, speed, flight time, and so forth. In one or more embodiments, the server can provide reports to various entities, such as an administrator of the network, an appropriate governmental agency (e.g., the Federal Aviation Administration), the operator of the remote control device, and so forth regarding the logged information, including violations of any rules or regulations.
While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIG. 45 , it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Moreover, not all illustrated blocks may be required to implement the methods described herein.
As illustrated in system 4600 of FIG. 46 , use of the unmanned aircraft 4410 is not limited to flights along transmission medium 1930 or power lines, but rather can be used for any types of locations. In one or more embodiments, the unmanned aircraft 4410 can be flown via control signals 4680 from the remote control device 4420 through protected or restricted space 4650 (where unmanned aircraft flight is permitted but other vehicles and/or personnel are not permitted). Data can be collected by the unmanned aircraft 4410 and transmitted via the network communication device 4450 and/or the base station 4475 as depicted by arrows 4682 , 4684 , such as to a server for processing and analysis. In one or more embodiments, the data can include Geographic Information System (GIS) information, such as 3D GIS data. In one or more embodiments, a registration of the unmanned aircraft 4410 and/or of an operator (or user) of the unmanned aircraft can be required before authorizing this flight and/or utilizing the network to provide communications.
Referring to FIG. 47 , a system 4700 is illustrated to facilitate control of an unmanned aircraft which may be flown to a target area or destination for various reasons, such as described with respect to systems 1900 , 2100 , 3400 , 3900 , 4100 , 4400 , 4600 including for deployment of equipment, collecting data, detecting undesired conditions in the network, and so forth. System 4700 can utilize a cloud-based flight/mission management compliance system. As an example, system 4700 can provide for managing in-flight compliance of unmanned aircraft. For instance, flight data for unmanned aircraft can be collected and stored in one or more databases 4710 for real-time and/or post-flight analysis. The collected data can be analyzed by a server 4725 , such as by being compared to the original flight plan, airspace access limits, time of day, day of week and/or other criteria for variance from an ideal or target profile. This comparison can be used to determine if an individual flight or mission was conducted appropriately and whether it was conducted by qualified personnel for the flight/mission type and profile. In one or more embodiments, software keys or interlocks can be provided to require a match of selected parameters before allowing a flight/mission, or for when a variance needs to be requested and granted. In one or more embodiments, system 4700 can provide for crowd-sourced data that might indicate a tightening, loosening or other change to the flight/mission rules by those who regulate the use of unmanned aircraft.
Referring to FIG. 48 , a system 4800 is illustrated to facilitate control of an unmanned aircraft 4810 which may be flown to a target area or destination for various reasons, such as described with respect to systems 1900 , 2100 , 3400 , 3900 , 4100 , 4400 , 4600 , 4700 including for deployment of equipment, collecting data, detecting undesired conditions in the network, and so forth. System 4800 can provide for the secure transfer of measurement and mission data, software updates, and mission loading through use of a structure that comprises a faraday cage 4825 which blocks electrical fields and provides a secure location for the unmanned aircraft 4810 to exchange information such as downloading data collected from a flight (e.g., RF parameters described in system 3500 ), uploading software, uploading flight instructions, and so forth. The faraday cage 4825 can also be constructed to contain any contaminants that the unmanned aircraft 4810 may have been exposed to such as chemical, biological, radiological, and/or explosive. A cleansing process 4850 can be undertaken and any of the contaminants can be moved to a contaminant storage for disposal. A data and power transfer 4875 can then be undertaken such as through use of a data and power interface 4830 .
System 4800 enables the provisioning of electrical power or fuel, the removal of environmental hazards and access for physical maintenance of the unmanned aircraft 4810 . In one or more embodiments, the faraday cage 4825 provides for a garage or hanger-like structure and environmental control chamber into which the unmanned aircraft 4810 can be secured for secure wireless uploading and downloading of information and where it can be cleared of environmental contaminants to which the unmanned aircraft might be exposed, such as while taking measurements in hazardous environments. The faraday cage 4825 can include a safe monitoring platform, as well as devices to clean the unmanned aircraft 4810 and to store any collected waste in a safe manner until it can be either rendered safe or removed to off-site, long-term storage. In the event the unmanned aircraft 4810 cannot be decontaminated, the faraday cage 4825 can secure the unmanned aircraft in a partitioned containment area until it can be safely removed off site and destroyed.
Referring now to FIG. 49 , there is illustrated a block diagram of a computing environment in accordance with various aspects described herein. In order to provide additional context for various embodiments of the embodiments described herein, FIG. 49 and the following discussion are intended to provide a brief, general description of a suitable computing environment 4900 in which the various embodiments of the subject disclosure can be implemented. While the embodiments have been described above in the general context of computer-executable instructions that can run on one or more computers, those skilled in the art will recognize that the embodiments can be also implemented in combination with other program modules and/or as a combination of hardware and software.
Generally, program modules comprise routines, programs, components, data structures, etc., that perform particular tasks or implement particular abstract data types. Moreover, those skilled in the art will appreciate that the inventive methods can be practiced with other computer system configurations, comprising single-processor or multiprocessor computer systems, minicomputers, mainframe computers, as well as personal computers, hand-held computing devices, microprocessor-based or programmable consumer electronics, and the like, each of which can be operatively coupled to one or more associated devices.
As used herein, a processing circuit includes processor as well as other application specific circuits such as an application specific integrated circuit, digital logic circuit, state machine, programmable gate array or other circuit that processes input signals or data and that produces output signals or data in response thereto. It should be noted that while any functions and features described herein in association with the operation of a processor could likewise be performed by a processing circuit.
The terms “first,” “second,” “third,” and so forth, as used in the claims, unless otherwise clear by context, is for clarity only and doesn't otherwise indicate or imply any order in time. For instance, “a first determination,” “a second determination,” and “a third determination,” does not indicate or imply that the first determination is to be made before the second determination, or vice versa, etc.
The illustrated embodiments of the embodiments herein can be also practiced in distributed computing environments where certain tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules can be located in both local and remote memory storage devices.
Computing devices typically comprise a variety of media, which can comprise computer-readable storage media and/or communications media, which two terms are used herein differently from one another as follows. Computer-readable storage media can be any available storage media that can be accessed by the computer and comprises both volatile and nonvolatile media, removable and non-removable media. By way of example, and not limitation, computer-readable storage media can be implemented in connection with any method or technology for storage of information such as computer-readable instructions, program modules, structured data or unstructured data.
Computer-readable storage media can comprise, but are not limited to, random access memory (RAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM),flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or other tangible and/or non-transitory media which can be used to store desired information. In this regard, the terms “tangible” or “non-transitory” herein as applied to storage, memory or computer-readable media, are to be understood to exclude only propagating transitory signals per se as modifiers and do not relinquish rights to all standard storage, memory or computer-readable media that are not only propagating transitory signals per se.
Computer-readable storage media can be accessed by one or more local or remote computing devices, e.g., via access requests, queries or other data retrieval protocols, for a variety of operations with respect to the information stored by the medium.
Communications media typically embody computer-readable instructions, data structures, program modules or other structured or unstructured data in a data signal such as a modulated data signal, e.g., a carrier wave or other transport mechanism, and comprises any information delivery or transport media. The term “modulated data signal” or signals refers to a signal that has one or more of its characteristics set or changed in such a manner as to encode information in one or more signals. By way of example, and not limitation, communication media comprise wired media, such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media.
With reference again to FIG. 49 , the example environment 4900 for transmitting and receiving signals via or forming at least part of a base station (e.g., base station devices 1504 , macrocell site 1502 , or base stations 1614 ) or central office (e.g., central office 1501 or 1611 ). At least a portion of the example environment 4900 can also be used for transmission devices 101 or 102 . The example environment can comprise a computer 4902 , the computer 4902 comprising a processing unit 4904 , a system memory 4906 and a system bus 4908 . The system bus 4908 couples system components including, but not limited to, the system memory 4906 to the processing unit 4904 . The processing unit 4904 can be any of various commercially available processors. Dual microprocessors and other multiprocessor architectures can also be employed as the processing unit 4904 .
The system bus 4908 can be any of several types of bus structure that can further interconnect to a memory bus (with or without a memory controller), a peripheral bus, and a local bus using any of a variety of commercially available bus architectures. The system memory 4906 comprises ROM 4910 and RAM 4912 . A basic input/output system (BIOS) can be stored in a non-volatile memory such as ROM, erasable programmable read only memory (EPROM), EEPROM, which BIOS contains the basic routines that help to transfer information between elements within the computer 4902 , such as during startup. The RAM 4912 can also comprise a high-speed RAM such as static RAM for caching data.
The computer 4902 further comprises an internal hard disk drive (HDD) 4914 (e.g., EIDE, SATA), which internal hard disk drive 4914 can also be configured for external use in a suitable chassis (not shown), a magnetic floppy disk drive (FDD) 4916 , (e.g., to read from or write to a removable diskette 4918 ) and an optical disk drive 4920 , (e.g., reading a CD-ROM disk 4922 or, to read from or write to other high capacity optical media such as the DVD). The hard disk drive 4914 , magnetic disk drive 4916 and optical disk drive 4920 can be connected to the system bus 4908 by a hard disk drive interface 4924 , a magnetic disk drive interface 4926 and an optical drive interface 4928 , respectively. The interface 4924 for external drive implementations comprises at least one or both of Universal Serial Bus (USB) and Institute of Electrical and Electronics Engineers (IEEE) 1394 interface technologies. Other external drive connection technologies are within contemplation of the embodiments described herein.
The drives and their associated computer-readable storage media provide nonvolatile storage of data, data structures, computer-executable instructions, and so forth. For the computer 4902 , the drives and storage media accommodate the storage of any data in a suitable digital format. Although the description of computer-readable storage media above refers to a hard disk drive (HDD), a removable magnetic diskette, and a removable optical media such as a CD or DVD, it should be appreciated by those skilled in the art that other types of storage media which are readable by a computer, such as zip drives, magnetic cassettes, flash memory cards, cartridges, and the like, can also be used in the example operating environment, and further, that any such storage media can contain computer-executable instructions for performing the methods described herein.
A number of program modules can be stored in the drives and RAM 4912 , comprising an operating system 4930 , one or more application programs 4932 , other program modules 4934 and program data 4936 . All or portions of the operating system, applications, modules, and/or data can also be cached in the RAM 4912 . The systems and methods described herein can be implemented utilizing various commercially available operating systems or combinations of operating systems. Examples of application programs 4932 that can be implemented and otherwise executed by processing unit 4904 include the diversity selection determining performed by transmission device 101 or 102 .
A user can enter commands and information into the computer 4902 through one or more wired/wireless input devices, e.g., a keyboard 4938 and a pointing device, such as a mouse 4940 . Other input devices (not shown) can comprise a microphone, an infrared (IR) remote control, a joystick, a game pad, a stylus pen, touch screen or the like. These and other input devices are often connected to the processing unit 4904 through an input device interface 4942 that can be coupled to the system bus 4908 , but can be connected by other interfaces, such as a parallel port, an IEEE 1394 serial port, a game port, a universal serial bus (USB) port, an IR interface, etc.
A monitor 4944 or other type of display device can be also connected to the system bus 4908 via an interface, such as a video adapter 4946 . It will also be appreciated that in alternative embodiments, a monitor 4944 can also be any display device (e.g., another computer having a display, a smart phone, a tablet computer, etc.) for receiving display information associated with computer 4902 via any communication means, including via the Internet and cloud-based networks. In addition to the monitor 4944 , a computer typically comprises other peripheral output devices (not shown), such as speakers, printers, etc.
The computer 4902 can operate in a networked environment using logical connections via wired and/or wireless communications to one or more remote computers, such as a remote computer(s) 4948 . The remote computer(s) 4948 can be a workstation, a server computer, a router, a personal computer, portable computer, microprocessor-based entertainment appliance, a peer device or other common network node, and typically comprises many or all of the elements described relative to the computer 4902 , although, for purposes of brevity, only a memory/storage device 4950 is illustrated. The logical connections depicted comprise wired/wireless connectivity to a local area network (LAN) 4952 and/or larger networks, e.g., a wide area network (WAN) 4954 . Such LAN and WAN networking environments are commonplace in offices and companies, and facilitate enterprise-wide computer networks, such as intranets, all of which can connect to a global communications network, e.g., the Internet.
When used in a LAN networking environment, the computer 4902 can be connected to the local network 4952 through a wired and/or wireless communication network interface or adapter 4956 . The adapter 4956 can facilitate wired or wireless communication to the LAN 4952 , which can also comprise a wireless AP disposed thereon for communicating with the wireless adapter 4956 .
When used in a WAN networking environment, the computer 4902 can comprise a modem 4958 or can be connected to a communications server on the WAN 4954 or has other means for establishing communications over the WAN 4954 , such as by way of the Internet. The modem 4958 , which can be internal or external and a wired or wireless device, can be connected to the system bus 4908 via the input device interface 4942 . In a networked environment, program modules depicted relative to the computer 4902 or portions thereof, can be stored in the remote memory/storage device 4950 . It will be appreciated that the network connections shown are example and other means of establishing a communications link between the computers can be used.
The computer 4902 can be operable to communicate with any wireless devices or entities operatively disposed in wireless communication, e.g., a printer, scanner, desktop and/or portable computer, portable data assistant, communications satellite, any piece of equipment or location associated with a wirelessly detectable tag (e.g., a kiosk, news stand, restroom), and telephone. This can comprise Wireless Fidelity (Wi-Fi) and BLUETOOTH® wireless technologies. Thus, the communication can be a predefined structure as with a conventional network or simply an ad hoc communication between at least two devices.
Wi-Fi can allow connection to the Internet from a couch at home, a bed in a hotel room or a conference room at work, without wires. Wi-Fi is a wireless technology similar to that used in a cell phone that enables such devices, e.g., computers, to send and receive data indoors and out; anywhere within the range of a base station. Wi-Fi networks use radio technologies called IEEE 802.11 (a, b, g, n, ac, ag etc.) to provide secure, reliable, fast wireless connectivity. A Wi-Fi network can be used to connect computers to each other, to the Internet, and to wired networks (which can use IEEE 802.3 or Ethernet). Wi-Fi networks operate in the unlicensed 2.4 and 5 GHz radio bands for example or with products that contain both bands (dual band), so the networks can provide real-world performance similar to the basic 10BaseT wired Ethernet networks used in many offices.
FIG. 50 presents an example embodiment 5000 of a mobile network platform 5010 that can implement and exploit one or more aspects of the disclosed subject matter described herein. In one or more embodiments, the mobile network platform 5010 can generate and receive signals transmitted and received by base stations (e.g., base station devices 1504 , macrocell site 1502 , or base stations 1614 ), central office (e.g., central office 1501 or 1611 ),or transmission device 101 or 102 associated with the disclosed subject matter. Generally, wireless network platform 5010 can comprise components, e.g., nodes, gateways, interfaces, servers, or disparate platforms, that facilitate both packet-switched (PS) (e.g., internet protocol (IP), frame relay, asynchronous transfer mode (ATM)) and circuit-switched (CS) traffic (e.g., voice and data), as well as control generation for networked wireless telecommunication. As a non-limiting example, wireless network platform 5010 can be included in telecommunications carrier networks, and can be considered carrier-side components as discussed elsewhere herein. Mobile network platform 5010 comprises CS gateway node(s) 5012 which can interface CS traffic received from legacy networks like telephony network(s) 5040 (e.g., public switched telephone network (PSTN), or public land mobile network (PLMN)) or a signaling system #7 (SS7) network 5070 . Circuit switched gateway node(s) 5012 can authorize and authenticate traffic (e.g., voice) arising from such networks. Additionally, CS gateway node(s) 5012 can access mobility, or roaming, data generated through SS7 network 5070 ; for instance, mobility data stored in a visited location register (VLR), which can reside in memory 5030 . Moreover, CS gateway node(s) 5012 interfaces CS-based traffic and signaling and PS gateway node(s) 5018 . As an example, in a 3GPP UMTS network, CS gateway node(s) 5012 can be realized at least in part in gateway GPRS support node(s) (GGSN). It should be appreciated that functionality and specific operation of CS gateway node(s) 5012 , PS gateway node(s) 5018 , and serving node(s) 5016 , is provided and dictated by radio technology(ies) utilized by mobile network platform 5010 for telecommunication.
In addition to receiving and processing CS-switched traffic and signaling, PS gateway node(s) 5018 can authorize and authenticate PS-based data sessions with served mobile devices. Data sessions can comprise traffic, or content(s), exchanged with networks external to the wireless network platform 5010 , like wide area network(s) (WANs) 5050 , enterprise network(s) 5070 , and service network(s) 5080 , which can be embodied in local area network(s) (LANs), can also be interfaced with mobile network platform 5010 through PS gateway node(s) 5018 . It is to be noted that WANs 5050 and enterprise network(s) 5060 can embody, at least in part, a service network(s) like IP multimedia subsystem (IMS). Based on radio technology layer(s) available in technology resource(s) 5017 , packet-switched gateway node(s) 5018 can generate packet data protocol contexts when a data session is established; other data structures that facilitate routing of packetized data also can be generated. To that end, in an aspect, PS gateway node(s) 5018 can comprise a tunnel interface (e.g., tunnel termination gateway (TTG) in 3GPP UMTS network(s) (not shown)) which can facilitate packetized communication with disparate wireless network(s), such as Wi-Fi networks.
In embodiment 5000 , wireless network platform 5010 also comprises serving node(s) 5016 that, based upon available radio technology layer(s) within technology resource(s) 5017 , convey the various packetized flows of data streams received through PS gateway node(s) 5018 . It is to be noted that for technology resource(s) 5017 that rely primarily on CS communication, server node(s) can deliver traffic without reliance on PS gateway node(s) 5018 ; for example, server node(s) can embody at least in part a mobile switching center. As an example, in a 3GPP UMTS network, serving node(s) 5016 can be embodied in serving GPRS support node(s) (SGSN).
For radio technologies that exploit packetized communication, server(s) 5014 in wireless network platform 5010 can execute numerous applications that can generate multiple disparate packetized data streams or flows, and manage (e.g., schedule, queue, format . . . ) such flows. Such application(s) can comprise add-on features to standard services (for example, provisioning, billing, customer support . . . ) provided by wireless network platform 5010 . Data streams (e.g., content(s) that are part of a voice call or data session) can be conveyed to PS gateway node(s) 5018 for authorization/authentication and initiation of a data session, and to serving node(s) 5016 for communication thereafter. In addition to application server, server(s) 5014 can comprise utility server(s), a utility server can comprise a provisioning server, an operations and maintenance server, a security server that can implement at least in part a certificate authority and firewalls as well as other security mechanisms, and the like. In an aspect, security server(s) secure communication served through wireless network platform 5010 to ensure network's operation and data integrity in addition to authorization and authentication procedures that CS gateway node(s) 5012 and PS gateway node(s) 5018 can enact. Moreover, provisioning server(s) can provision services from external network(s) like networks operated by a disparate service provider; for instance, WAN 5050 or Global Positioning System (GPS) network(s) (not shown). Provisioning server(s) can also provision coverage through networks associated to wireless network platform 5010 (e.g., deployed and operated by the same service provider), such as the distributed antennas networks shown in FIG. 1( s ) that enhance wireless service coverage by providing more network coverage. Repeater devices such as those shown in FIGS. 7, 8, and 9 also improve network coverage in order to enhance subscriber service experience by way of UE 5075 .
It is to be noted that server(s) 5014 can comprise one or more processors configured to confer at least in part the functionality of macro network platform 5010 . To that end, the one or more processor can execute code instructions stored in memory 5030 , for example. It is should be appreciated that server(s) 5014 can comprise a content manager 5015 , which operates in substantially the same manner as described hereinbefore.
In example embodiment 5000 , memory 5030 can store information related to operation of wireless network platform 5010 . Other operational information can comprise provisioning information of mobile devices served through wireless platform network 5010 , subscriber databases; application intelligence, pricing schemes, e.g., promotional rates, flat-rate programs, couponing campaigns; technical specification(s) consistent with telecommunication protocols for operation of disparate radio, or wireless, technology layers; and so forth. Memory 5030 can also store information from at least one of telephony network(s) 5040 , WAN 5050 , enterprise network(s) 5070 , or SS7 network 5060 . In an aspect, memory 5030 can be, for example, accessed as part of a data store component or as a remotely connected memory store.
In order to provide a context for the various aspects of the disclosed subject matter, FIG. 50 , and the following discussion, are intended to provide a brief, general description of a suitable environment in which the various aspects of the disclosed subject matter can be implemented. While the subject matter has been described above in the general context of computer-executable instructions of a computer program that runs on a computer and/or computers, those skilled in the art will recognize that the disclosed subject matter also can be implemented in combination with other program modules. Generally, program modules comprise routines, programs, components, data structures, etc. that perform particular tasks and/or implement particular abstract data types.
FIG. 51 depicts an illustrative embodiment of a communication device 5100 . The communication device 5100 can serve as an illustrative embodiment of devices such as mobile devices and in-building devices referred to by the subject disclosure (e.g., in FIGS. 15, 16A and 16B ).
The communication device 5100 can comprise a wireline and/or wireless transceiver 5102 (herein transceiver 5102 ), a user interface (UI) 5104 , a power supply 5114 , a location receiver 5116 , a motion sensor 5118 , an orientation sensor 5120 , and a controller 5106 for managing operations thereof. The transceiver 5102 can support short-range or long-range wireless access technologies such as Bluetooth®, ZigBee®, WiFi, DECT, or cellular communication technologies, just to mention a few (Bluetooth® and ZigBee® are trademarks registered by the Bluetooth® Special Interest Group and the ZigBee® Alliance, respectively). Cellular technologies can include, for example, CDMA-1×, UMTS/HSDPA, GSM/GPRS, TDMA/EDGE, EV/DO, WiMAX, SDR, LTE, as well as other next generation wireless communication technologies as they arise. The transceiver 5102 can also be adapted to support circuit-switched wireline access technologies (such as PSTN), packet-switched wireline access technologies (such as TCP/IP, VoIP, etc.), and combinations thereof.
The UI 5104 can include a depressible or touch-sensitive keypad 5108 with a navigation mechanism such as a roller ball, a joystick, a mouse, or a navigation disk for manipulating operations of the communication device 5100 . The keypad 5108 can be an integral part of a housing assembly of the communication device 5100 or an independent device operably coupled thereto by a tethered wireline interface (such as a USB cable) or a wireless interface supporting for example Bluetooth®. The keypad 5108 can represent a numeric keypad commonly used by phones, and/or a QWERTY keypad with alphanumeric keys. The UI 5104 can further include a display 5110 such as monochrome or color LCD (Liquid Crystal Display), OLED (Organic Light Emitting Diode) or other suitable display technology for conveying images to an end user of the communication device 5100 . In an embodiment where the display 5110 is touch-sensitive, a portion or all of the keypad 5108 can be presented by way of the display 5110 with navigation features.
The display 5110 can use touch screen technology to also serve as a user interface for detecting user input. As a touch screen display, the communication device 5100 can be adapted to present a user interface having graphical user interface (GUI) elements that can be selected by a user with a touch of a finger. The touch screen display 5110 can be equipped with capacitive, resistive or other forms of sensing technology to detect how much surface area of a user's finger has been placed on a portion of the touch screen display. This sensing information can be used to control the manipulation of the GUI elements or other functions of the user interface. The display 5110 can be an integral part of the housing assembly of the communication device 5100 or an independent device communicatively coupled thereto by a tethered wireline interface (such as a cable) or a wireless interface.
The UI 5104 can also include an audio system 5112 that utilizes audio technology for conveying low volume audio (such as audio heard in proximity of a human ear) and high volume audio (such as speakerphone for hands free operation). The audio system 5112 can further include a microphone for receiving audible signals of an end user. The audio system 5112 can also be used for voice recognition applications. The UI 5104 can further include an image sensor 5113 such as a charged coupled device (CCD) camera for capturing still or moving images.
The power supply 5114 can utilize common power management technologies such as replaceable and rechargeable batteries, supply regulation technologies, and/or charging system technologies for supplying energy to the components of the communication device 5100 to facilitate long-range or short-range portable communications. Alternatively, or in combination, the charging system can utilize external power sources such as DC power supplied over a physical interface such as a USB port or other suitable tethering technologies.
The location receiver 5116 can utilize location technology such as a global positioning system (GPS) receiver capable of assisted GPS for identifying a location of the communication device 5100 based on signals generated by a constellation of GPS satellites, which can be used for facilitating location services such as navigation. The motion sensor 5118 can utilize motion sensing technology such as an accelerometer, a gyroscope, or other suitable motion sensing technology to detect motion of the communication device 5100 in three-dimensional space. The orientation sensor 5120 can utilize orientation sensing technology such as a magnetometer to detect the orientation of the communication device 5100 (north, south, west, and east, as well as combined orientations in degrees, minutes, or other suitable orientation metrics).
The communication device 5100 can use the transceiver 5102 to also determine a proximity to a cellular, WiFi, Bluetooth®, or other wireless access points by sensing techniques such as utilizing a received signal strength indicator (RSSI) and/or signal time of arrival (TOA) or time of flight (TOF) measurements. The controller 5106 can utilize computing technologies such as a microprocessor, a digital signal processor (DSP), programmable gate arrays, application specific integrated circuits, and/or a video processor with associated storage memory such as Flash, ROM, RAM, SRAM, DRAM or other storage technologies for executing computer instructions, controlling, and processing data supplied by the aforementioned components of the communication device 5100 .
Other components not shown in FIG. 51 can be used in one or more embodiments of the subject disclosure. For instance, the communication device 5100 can include a slot for adding or removing an identity module such as a Subscriber Identity Module (SIM) card or Universal Integrated Circuit Card (UICC). SIM or UICC cards can be used for identifying subscriber services, executing programs, storing subscriber data, and so on.
In the subject specification, terms such as “store,” “storage,” “data store,” data storage,” “database,” and substantially any other information storage component relevant to operation and functionality of a component, refer to “memory components,” or entities embodied in a “memory” or components comprising the memory. It will be appreciated that the memory components described herein can be either volatile memory or nonvolatile memory, or can comprise both volatile and nonvolatile memory, by way of illustration, and not limitation, volatile memory, non-volatile memory, disk storage, and memory storage. Further, nonvolatile memory can be included in read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory can comprise random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in many forms such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DRRAM). Additionally, the disclosed memory components of systems or methods herein are intended to comprise, without being limited to comprising, these and any other suitable types of memory.
Moreover, it will be noted that the disclosed subject matter can be practiced with other computer system configurations, comprising single-processor or multiprocessor computer systems, mini-computing devices, mainframe computers, as well as personal computers, hand-held computing devices (e.g., PDA, phone, smartphone, watch, tablet computers, netbook computers, etc.), microprocessor-based or programmable consumer or industrial electronics, and the like. The illustrated aspects can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network; however, some if not all aspects of the subject disclosure can be practiced on stand-alone computers. In a distributed computing environment, program modules can be located in both local and remote memory storage devices.
Some of the embodiments described herein can also employ artificial intelligence (AI) to facilitate automating one or more features described herein. For example, artificial intelligence can be used in optional training controller 230 evaluate and select candidate frequencies, modulation schemes, MIMO modes, and/or guided wave modes in order to maximize transfer efficiency. The embodiments (e.g., in connection with automatically identifying acquired cell sites that provide a maximum value/benefit after addition to an existing communication network) can employ various AI-based schemes for carrying out various embodiments thereof. Moreover, the classifier can be employed to determine a ranking or priority of the each cell site of the acquired network. A classifier is a function that maps an input attribute vector, x=(x1, x2, x3, x4, . . . , xn), to a confidence that the input belongs to a class, that is, f(x)=confidence (class). Such classification can employ a probabilistic and/or statistical-based analysis (e.g., factoring into the analysis utilities and costs) to prognose or infer an action that a user desires to be automatically performed. A support vector machine (SVM) is an example of a classifier that can be employed. The SVM operates by finding a hypersurface in the space of possible inputs, which the hypersurface attempts to split the triggering criteria from the non-triggering events. Intuitively, this makes the classification correct for testing data that is near, but not identical to training data. Other directed and undirected model classification approaches comprise, e.g., naïve Bayes, Bayesian networks, decision trees, neural networks, fuzzy logic models, and probabilistic classification models providing different patterns of independence can be employed. Classification as used herein also is inclusive of statistical regression that is utilized to develop models of priority.
As will be readily appreciated, one or more of the embodiments can employ classifiers that are explicitly trained (e.g., via a generic training data) as well as implicitly trained (e.g., via observing UE behavior, operator preferences, historical information, receiving extrinsic information). For example, SVMs can be configured via a learning or training phase within a classifier constructor and feature selection module. Thus, the classifier(s) can be used to automatically learn and perform a number of functions, including but not limited to determining according to a predetermined criteria which of the acquired cell sites will benefit a maximum number of subscribers and/or which of the acquired cell sites will add minimum value to the existing communication network coverage, etc.
As used in some contexts in this application, in some embodiments, the terms “component,” “system” and the like are intended to refer to, or comprise, a computer-related entity or an entity related to an operational apparatus with one or more specific functionalities, wherein the entity can be either hardware, a combination of hardware and software, software, or software in execution. As an example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, computer-executable instructions, a program, and/or a computer. By way of illustration and not limitation, both an application running on a server and the server can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate via local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems via the signal). As another example, a component can be an apparatus with specific functionality provided by mechanical parts operated by electric or electronic circuitry, which is operated by a software or firmware application executed by a processor, wherein the processor can be internal or external to the apparatus and executes at least a part of the software or firmware application. As yet another example, a component can be an apparatus that provides specific functionality through electronic components without mechanical parts, the electronic components can comprise a processor therein to execute software or firmware that confers at least in part the functionality of the electronic components. While various components have been illustrated as separate components, it will be appreciated that multiple components can be implemented as a single component, or a single component can be implemented as multiple components, without departing from example embodiments.
Further, the various embodiments can be implemented as a method, apparatus or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware or any combination thereof to control a computer to implement the disclosed subject matter. The term “article of manufacture” as used herein is intended to encompass a computer program accessible from any computer-readable device or computer-readable storage/communications media. For example, computer readable storage media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips), optical disks (e.g., compact disk (CD), digital versatile disk (DVD)), smart cards, and flash memory devices (e.g., card, stick, key drive). Of course, those skilled in the art will recognize many modifications can be made to this configuration without departing from the scope or spirit of the various embodiments.
In addition, the words “example” and “exemplary” are used herein to mean serving as an instance or illustration. Any embodiment or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word example or exemplary is intended to present concepts in a concrete fashion. As used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form.
Moreover, terms such as “user equipment,” “mobile station,” “mobile,” subscriber station,” “access terminal,” “terminal,” “handset,” “mobile device” (and/or terms representing similar terminology) can refer to a wireless device utilized by a subscriber or user of a wireless communication service to receive or convey data, control, voice, video, sound, gaming or substantially any data-stream or signaling-stream. The foregoing terms are utilized interchangeably herein and with reference to the related drawings.
Furthermore, the terms “user,” “subscriber,” “customer,” “consumer” and the like are employed interchangeably throughout, unless context warrants particular distinctions among the terms. It should be appreciated that such terms can refer to human entities or automated components supported through artificial intelligence (e.g., a capacity to make inference based, at least, on complex mathematical formalisms), which can provide simulated vision, sound recognition and so forth.
As employed herein, the term “processor” can refer to substantially any computing processing unit or device comprising, but not limited to comprising, single-core processors; single-processors with software multithread execution capability; multi-core processors; multi-core processors with software multithread execution capability; multi-core processors with hardware multithread technology; parallel platforms; and parallel platforms with distributed shared memory. Additionally, a processor can refer to an integrated circuit, an application specific integrated circuit (ASIC), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic controller (PLC), a complex programmable logic device (CPLD), a discrete gate or transistor logic, discrete hardware components or any combination thereof designed to perform the functions described herein. Processors can exploit nano-scale architectures such as, but not limited to, molecular and quantum-dot based transistors, switches and gates, in order to optimize space usage or enhance performance of user equipment. A processor can also be implemented as a combination of computing processing units.
As used herein, terms such as “data storage,” data storage,” “database,” and substantially any other information storage component relevant to operation and functionality of a component, refer to “memory components,” or entities embodied in a “memory” or components comprising the memory. It will be appreciated that the memory components or computer-readable storage media, described herein can be either volatile memory or nonvolatile memory or can include both volatile and nonvolatile memory.
What has been described above includes mere examples of various embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing these examples, but one of ordinary skill in the art can recognize that many further combinations and permutations of the present embodiments are possible. Accordingly, the embodiments disclosed and/or claimed herein are intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.
In addition, a flow diagram may include a “start” and/or “continue” indication. The “start” and “continue” indications reflect that the steps presented can optionally be incorporated in or otherwise used in conjunction with other routines. In this context, “start” indicates the beginning of the first step presented and may be preceded by other activities not specifically shown. Further, the “continue” indication reflects that the steps presented may be performed multiple times and/or may be succeeded by other activities not specifically shown. Further, while a flow diagram indicates a particular ordering of steps, other orderings are likewise possible provided that the principles of causality are maintained.
As may also be used herein, the term(s) “operably coupled to”, “coupled to”, and/or “coupling” includes direct coupling between items and/or indirect coupling between items via one or more intervening items. Such items and intervening items include, but are not limited to, junctions, communication paths, components, circuit elements, circuits, functional blocks, and/or devices. As an example of indirect coupling, a signal conveyed from a first item to a second item may be modified by one or more intervening items by modifying the form, nature or format of information in a signal, while one or more elements of the information in the signal are nevertheless conveyed in a manner than can be recognized by the second item. In a further example of indirect coupling, an action in a first item can cause a reaction on the second item, as a result of actions and/or reactions in one or more intervening items.
Although specific embodiments have been illustrated and described herein, it should be appreciated that any arrangement which achieves the same or similar purpose may be substituted for the embodiments described or shown by the subject disclosure. The subject disclosure is intended to cover any and all adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, can be used in the subject disclosure. For instance, one or more features from one or more embodiments can be combined with one or more features of one or more other embodiments. In one or more embodiments, features that are positively recited can also be negatively recited and excluded from the embodiment with or without replacement by another structural and/or functional feature. The steps or functions described with respect to the embodiments of the subject disclosure can be performed in any order. The steps or functions described with respect to the embodiments of the subject disclosure can be performed alone or in combination with other steps or functions of the subject disclosure, as well as from other embodiments or from other steps that have not been described in the subject disclosure. Further, more than or less than all of the features described with respect to an embodiment can also be utilized.