Methods and apparatus for inducing electromagnetic waves within pathways of a cable

• US 10,411,920 B2
• Filed: 10/06/2017
• Issued: 09/10/2019
• Est. Priority Date: 11/20/2014
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Henry, Paul Shala, Vannucci, Giovanni, Willis, III, Thomas M., Bennett, Robert, Gerszberg, Irwin, Barzegar, Farhad, Barnickel, Donald J., Birk, Martin, Johnson, Shikik
• Primary Examiner(s): Timory, Kabir A
• Application Number:
  US15/727,289
• Publication Number:
  US 20180123836A1
• Time in Patent Office: 704 Days
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04B 5/28 using the near field of leaky cables, e.g. of leaky coaxial cables
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 25/03891 Spatial equalizers MIMO diversity systems H04B7/0413
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

In accordance with one or more embodiments, a system can include a plurality of uninsulated conductors that is stranded together. The plurality of uninsulated conductors can form a hollow pathway that is bounded by internal conductive surfaces of at least three of the plurality of uninsulated conductors. The system can further include a communication device coupled to a first plurality of external conductive surfaces of the plurality of uninsulated conductors, where the communication device facilitates generating transmission signals at the first plurality of external conductive surfaces, and where the transmission signals induce electromagnetic waves that propagate along the hollow pathway without requiring an electrical return path. Other embodiments are disclosed.

Claims

1. A system, comprising:

a first plurality of uninsulated conductors that is stranded together, wherein the first plurality of uninsulated conductors forms a first hollow pathway that is bounded by internal conductive surfaces of the first plurality of uninsulated conductors; and

a communication device coupled to a first plurality of external conductive surfaces of the first plurality of uninsulated conductors, wherein the communication device facilitates receiving a communication signal and generating transmission signals at the first plurality of external conductive surfaces, wherein the transmission signals convey the communication signal, wherein the transmission signals induce guided electromagnetic waves that propagate along the first hollow pathway without requiring an electrical return path, wherein the guided electromagnetic waves convey the communication signal, wherein the guided electromagnetic waves are directed to a receiving device via the first hollow pathway, wherein the receiving device is coupled to the first hollow pathway, and wherein the receiving device facilitates receiving the guided electromagnetic waves and extracting the communication signal from the guided electromagnetic waves.

2. The system of claim 1, wherein the communication device facilitates frequency-shifting the communication signals to generate the transmission signals.

3. The system of claim 1, wherein the receiving device utilizes a plurality of antennas to receive the guided electromagnetic waves via the first hollow pathway.

4. The system of claim 1, wherein the receiving device obtains the communication signal from the guided electromagnetic waves by processing the guided electromagnetic waves according to at least one of a plurality of multi-input multi-output (MIMO) techniques.

5. The system of claim 1, wherein the receiving device is coupled to a second hollow pathway formed from a second plurality of external conductive surfaces of the plurality of uninsulated conductors, and wherein the receiving device receives the guided electromagnetic waves via the second hollow pathway.

6. The system of claim 1, wherein the guided electromagnetic waves are generated by the communication device according to at least one of a plurality of MIMO techniques.

7. A method, comprising:

receiving, by a communication device, a communication signal; and

responsive to the communication signal, generating, by the communication device, transmission signals at a first plurality of external conductive surfaces of a plurality of uninsulated conductors that is stranded together, wherein the plurality of uninsulated conductors forms a first hollow waveguide that is bounded by internal conductive surfaces of the plurality of uninsulated conductors, wherein the transmission signals convey the communication signal and induce guided electromagnetic waves that propagate along the first hollow waveguide without requiring an electrical return path, wherein the guided electromagnetic waves convey the communication signal, wherein the guided electromagnetic waves are directed to a receiving device via the first hollow waveguide, wherein the receiving device is coupled to the first hollow waveguide, and wherein the receiving device facilitates receiving the guided electromagnetic waves and extracting the communication signal from the guided electromagnetic waves.

8. The method of claim 7, wherein the communication signal comprises a wireless signal transmitted by a wireless communication device.

9. The method of claim 7, wherein the generating comprises frequency-shifting the communication signal to generate the transmission signals.

10. The method of claim 7, wherein the receiving device utilizes a plurality of antennas to receive the guided electromagnetic waves via the first hollow waveguide.

11. The method of claim 7, wherein the receiving device extracts communication signals from the guided electromagnetic waves by processing the guided electromagnetic waves according to at least one of a plurality of multi-input multi-output (MIMO) techniques.

12. The method of claim 7, wherein the receiving device is coupled to a second hollow waveguide formed from a second plurality of external conductive surfaces of the plurality of uninsulated conductors, and wherein the receiving device receives the guided electromagnetic waves via the second hollow waveguide.

13. The method of claim 7, wherein the generating comprises selecting, by the communication device, at least one of a plurality of MIMO techniques to generate the transmission signals.

14. A transmission device, comprising:

a processing system including a processor; and

a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising;

receiving a communication signal; and

responsive to the communication signal, generating transmission signals at a plurality of external conductive surfaces of a plurality of uninsulated conductors that is stranded together, wherein internal conductive surfaces of the plurality of uninsulated conductors forms a first interstitial area, wherein the transmission signals convey the communication signal and induce guided electromagnetic waves that propagate along the first interstitial area without requiring an electrical return path, wherein the guided electromagnetic waves convey the communication signal, wherein the guided electromagnetic waves are directed to a receiving device via the first interstitial area, wherein the receiving device is coupled to the first interstitial area, and wherein the receiving device facilitates receiving the guided electromagnetic waves and extracting the communication signal from the guided electromagnetic waves.

15. The transmission device of claim 14, wherein the communication signal comprises data associated with a wireless signal transmitted by a wireless communication device.

16. The transmission device of claim 14, wherein the generating comprises frequency-shifting the communication signal to generate the transmission signals.

17. The transmission device of claim 14, wherein the receiving device extracts the communication signal from the guided electromagnetic waves by processing the guided electromagnetic waves according to at least one of a plurality of multi-input multi-output (MIMO) techniques.

18. The transmission device of claim 14, wherein the receiving device is coupled to a second interstitial area formed by a second plurality of external conductive surfaces of the plurality of uninsulated conductors, and wherein the receiving device receives the guided electromagnetic waves via the second interstitial area.

19. The transmission device of claim 14, wherein the generating comprises selecting, by the transmission device, at least one of a plurality of MIMO techniques to generate the transmission signals.

20. The transmission device of claim 14, wherein the receiving device utilizes a plurality of antennas to receive the guided electromagnetic waves via the first interstitial area.