Technique for conveying a wireless-standard signal through a barrier

• US 8,344,829 B2
• Filed: 12/08/2009
• Issued: 01/01/2013
• Est. Priority Date: 12/08/2009
• 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: Miller, Robert R. II, Worstell, Harry R.
• Primary Examiner(s): Takaoka, Dean O
• Application Number:
  US12/653,166
• Publication Number:
  US 20110133865A1
• Time in Patent Office: 1,120 Days
• Field of Search: 333/236, 333/237, 333/239, 333/240, 333/243, 333/24.R
• US Class Current: 333/240
• CPC Class Codes: H01P 3/06 Coaxial lines
• CPC Class Codes: H01P 5/12 Coupling devices having more than two ports H01P5/04 takes precedence

Abstract

The RF signal generated by a ZigBee radio on the outside of a building structure is conveyed to the interior of the building by guiding it along an electric cable bundle that passes through the building'"'"'s wall to supply domestic electric power to the interior of the structure. The RF signal is launched by a unique coupler comprising a pair of insulated foil conductors.

Claims

1. An apparatus comprising

a transmitter configured to generate a wireless networking signal conforming to a wireless networking standard, and

a signal propagation structure that includes a signal guide, the signal propagation structure being configured to extend the wireless networking signal from a first side of a barrier to a second side of the barrier by causing the wireless networking signal to be guided as a electromagnetic wave along an electromagnetic-wave-guiding path through the barrier,

wherein the barrier is an exterior wall of a building structure,

wherein the signal propagation structure includes a coaxial waveguide,

and wherein the coaxial waveguide comprises an electric power cable conveying domestic power through the barrier over at least one inner conductor, and a conductive medium disposed on the electric power cable.

2. An apparatus comprising

a transmitter configured to generate a wireless networking signal conforming to a wireless networking standard, and

a signal propagation structure that includes a signal guide, the signal propagation structure being configured to extend the wireless networking signal from a first side of a barrier to a second side of the barrier by causing the wireless networking signal to be guided as a electromagnetic wave along an electromagnetic-wave-guiding path through the barrier,

wherein the barrier is an exterior wall of a building structure,

and wherein the signal propagation structure is configured to cause the wireless networking signal to be guided along the electromagnetic-wave-guiding path using transverse-magnetic surface wave propagation.

3. The apparatus of claim 2 wherein the wireless networking standard is a standard adopted by a wireless-networking-industry-standards-setting body.

4. The apparatus of claim 3 wherein the wireless-networking-industry-standards-setting body is the IEEE.

5. The apparatus of claim 2 wherein the signal guide is an electrical cable of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.

8. The apparatus of claim 2 wherein the signal propagation structure includes a) an electric power cable conveying domestic power through the barrier over at least one inner conductor and b) a conductive medium disposed on the electric power cable.

9. The apparatus of claim 8 wherein the wireless networking signal is guided in a Goubau propagation mode.

10. The apparatus of claim 8 wherein the electric power cable is of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.

11. The apparatus of claim 2 wherein the transverse-magnetic surface wave propagation is Goubau propagation.

12. The apparatus of claim 11 wherein the signal guide is an electrical cable of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.

6. The apparatus of 2 wherein the signal propagation structure includes at least one electrical conductor that extends through the barrier.

7. The apparatus of claim 6 wherein the signal guide is an electrical cable of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.

13. An apparatus comprising

a transmitter configured to generate a wireless networking signal conforming to a wireless networking standard,

a signal propagation structure that includes a signal guide, the signal propagation structure being configured to extend the wireless networking signal from a first side of a barrier to a second side of the barrier by causing the wireless networking signal to be guided as a electromagnetic wave along an electromagnetic-wave-guiding path through the barrier, and

a repeater configured to detect the guided electromagnetic wave at the second side of the barrier and to re-broadcast the detected wave,

wherein the repeater is mounted on a circuit breaker panel disposed on the second side of the barrier and further comprises an antenna, mounted on the circuit breaker panel, from which the detected wave is re-broadcast.

14. The apparatus of claim 13 wherein the wireless networking signal is guided in a Goubau propagation mode.

15. The apparatus of claim 13 wherein the signal guide is an electrical cable of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.

16. An apparatus comprising

a transmitter configured to generate a wireless networking signal conforming to a wireless networking standard, and

a signal propagation structure that includes a signal guide, the signal propagation structure being configured to extend the wireless networking signal from a first side of a barrier to a second side of the barrier by causing the wireless networking signal to be guided as a electromagnetic wave along an electromagnetic-wave-guiding path through the barrier,

wherein the barrier is an exterior wall of a building structure,

and wherein the wireless networking standard is IEEE 802.15.4.

17. The apparatus of claim 16 wherein the wireless networking signal is guided in a Goubau propagation mode.

18. An apparatus comprising

a transmitter configured to generate a wireless networking signal conforming to a wireless networking standard,

a signal propagation structure that includes a signal guide, the signal propagation structure being configured to extend the wireless networking signal from a first side of a barrier to a second side of the barrier by causing the wireless networking signal to be guided as a electromagnetic wave along an electromagnetic-wave-guiding path through the barrier, and

a repeater configured to detect the guided electromagnetic wave at the second side of the barrier and to re-broadcast the detected wave,

wherein the barrier is an exterior wall of a building structure,

and wherein the repeater is mounted on a circuit breaker panel disposed on the second side of the barrier and further comprises an antenna, mounted on the circuit breaker panel, from which the detected wave is re-broadcast.

19. The apparatus of claim 18 wherein the wireless networking signal is guided in a Goubau propagation mode.

20. The apparatus of claim 18 wherein the signal guide is an electrical cable of at least a size specified by the National Electrical Code for supplying 100 amperes of electrical service.