Access point and methods for communicating with guided electromagnetic waves

• US 10,560,151 B2
• Filed: 02/07/2019
• Issued: 02/11/2020
• Est. Priority Date: 11/15/2017
• 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: Barzegar, Farhad, Gerszberg, Irwin, Vannucci, Giovanni, Wolniansky, Peter, Henry, Paul Shala
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US16/269,894
• Publication Number:
  US 20190173525A1
• Time in Patent Office: 369 Days
• CPC Class Codes: H01P 3/16 Dielectric waveguides, i.e. without a longitudinal conductor
• CPC Class Codes: H01P 5/04 with variable factor of coupling
• CPC Class Codes: H01Q 1/46 Electric supply lines or communication lines
• CPC Class Codes: H04B 3/544 Setting up communications; Call and signalling arrangements
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals
• CPC Class Codes: H04B 3/58 Repeater circuits
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04W 56/0025 synchronizing potentially movable access points
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/20 between access points

Abstract

In accordance with one or more embodiments, an access point includes a first communication interface having: a first coupler configured to receive, via a first transmission medium, first guided electromagnetic waves from a first waveguide system of a distributed antenna system, wherein the first guided electromagnetic waves propagate along the first transmission medium without requiring an electrical return path; and also a first receiver configured to receive first data from the first guided electromagnetic waves. A data switch is configured to select first selected portions of the first data for transmission to at least one communication device in proximity to the access point.

Claims

1. An access point comprising:

a first communication interface that includes;

a first coupler configured to receive, via a first transmission medium, first guided electromagnetic waves from a first waveguide system of a distributed antenna system, wherein the first guided electromagnetic waves propagate along the first transmission medium without requiring an electrical return path; and

a receiver configured to receive first data from the first guided electromagnetic waves; and

a data switch configured to select first selected portions of the first data for transmission to at least one communication device in proximity to the access point;

wherein the first waveguide system is coupled to a medium voltage power line supported by a utility pole and wherein the first waveguide system sends and receives second guided electromagnetic waves along an outer surface of the medium voltage power line.

2. The access point of claim 1, wherein the first transmission medium includes a dielectric core surrounded, at least in part, by a dielectric cladding.

3. The access point of claim 2, wherein the dielectric core has a first relative permittivity and the dielectric cladding has a second relative permittivity that is less than the first relative permittivity.

4. The access point of claim 2, wherein the first guided electromagnetic waves propagate along the first transmission medium with a first electromagnetic field strength within the dielectric core and a second electromagnetic field strength within the dielectric cladding.

5. The access point of claim 4, wherein the first electromagnetic field strength is greater than the second electromagnetic field strength.

6. The access point of claim 1, wherein the first data is formatted in accordance with an Ethernet protocol and wherein the data switch includes an Ethernet switch.

7. The access point of claim 6, wherein the Ethernet switch routes, via a wired connection, the first selected portions of the first data to the at least one communication device.

8. The access point of claim 1, further comprising a wireless transceiver that transmits the first selected portions of the first data to the at least one communication device in accordance with a wireless communication protocol.

9. The access point of claim 1, further comprising:

a second communication interface that includes;

a second coupler configured to transmit, via a second transmission medium and in response to electromagnetic signals, third guided electromagnetic waves to a second waveguide system of the distributed antenna system, wherein the third guided electromagnetic waves propagate along the second transmission medium without requiring the electrical return path; and

a transmitter configured to generate the electromagnetic signals in response to second selected portions of the first data;

wherein the data switch is further configured to select the second selected portions of the first data.

10. The access point of claim 1, wherein the data switch is further configured to route second data, received from the at least one communication device, to the first communication interface;

wherein the first communication interface further includes a transmitter configured to generate electromagnetic signals in response to the second data; and

wherein the first coupler is further configured to transmit via the first transmission medium, responsive to the electromagnetic signals, third guided electromagnetic waves to the first waveguide system of the distributed antenna system, wherein the third guided electromagnetic waves propagate along the first transmission medium without requiring the electrical return path.

11. The access point of claim 1, wherein the access point further comprises a low voltage power supply that generates a power supply voltage from a low voltage power line supported by the utility pole, and wherein the power supply voltage powers the first communication interface and the data switch.

12. The access point of claim 1, wherein the second guided electromagnetic waves propagate along the medium voltage power line without requiring the electrical return path.

13. A method comprising:

receiving, via a first coupler coupled to a first transmission medium, first guided electromagnetic waves from a first waveguide system of a distributed antenna system, wherein the first guided electromagnetic waves propagate along the first transmission medium without requiring an electrical return path, and wherein the first guided electromagnetic waves convey first data; and

selecting, via a data switch, selected portions of the first data for transmission to at least one communication device;

wherein the first waveguide system is coupled to a medium voltage power line supported by a utility pole and wherein the first waveguide system sends and receives second guided electromagnetic waves along an outer surface of the medium voltage power line.

14. The method of claim 13, wherein the first transmission medium includes a dielectric core surrounded, at least in part, by a dielectric cladding.

15. The method of claim 14, wherein the dielectric core has a first relative permittivity and the dielectric cladding has a second relative permittivity that is less than the first relative permittivity.

16. The method of claim 14, wherein the first guided electromagnetic waves propagate along the first transmission medium with a first electromagnetic field strength within the dielectric core and a second electromagnetic field strength within the dielectric cladding, and wherein the first electromagnetic field strength is greater than the second electromagnetic field strength.

17. The method of claim 13, further comprising:

routing, via a wired connection, the selected portions of the first data to the at least one communication device.

18. The method of claim 13, further comprising:

transmitting, via a wireless transceiver, the selected portions of the first data to the at least one communication device in accordance with a wireless communication protocol.

19. The method of claim 13, further comprising:

receiving from a second waveguide system of the distributed antenna system, via a second coupler coupled to a second transmission medium, third guided electromagnetic waves, wherein the third guided electromagnetic waves propagate along the second transmission medium without requiring the electrical return path, and wherein the third guided electromagnetic waves convey second data; and

routing, via the data switch, the second data to a transmitter;

generating, via the transmitter, electromagnetic signals that convey the second data; and

generating, via the first coupler and responsive to the electromagnetic signals, fourth electromagnetic waves, wherein the fourth electromagnetic waves propagate to the first waveguide system along the first transmission medium without requiring the electrical return path.

20. An access point comprising:

means for receiving guided electromagnetic waves from a waveguide system of a distributed antenna system via a transmission medium, wherein the guided electromagnetic waves propagate along the transmission medium without requiring an electrical return path, and wherein the guided electromagnetic waves convey data, and wherein the waveguide system is coupled to a medium voltage power line supported by a utility pole and wherein the waveguide system sends and receives second guided electromagnetic waves along an outer surface of the medium voltage power line;

means for selecting selected portions of the data for transmission to at least one communication device;

means for transmitting the selected portions of the data to the at least one communication device; and

a low voltage power supply that generates a power supply voltage from a low voltage power line supported by the utility pole, and wherein the power supply voltage powers the means for receiving, the means for transmitting and the means for selecting.