Method and apparatus for attaching power line communications to customer premises

• US 6,975,212 B2
• Filed: 08/16/2002
• Issued: 12/13/2005
• Est. Priority Date: 10/02/2001
• Status: Expired due to Fees

• Current Assignee: Telkonet Communications, Inc. (Comstock Coal Co., Inc.)
• Original Assignee: Telkonet Communications, Inc. (Comstock Coal Co., Inc.)
• Inventors: Crenshaw, Ralph E., Grimes, David W., Larson, L. Peter
• Primary Examiner(s): SWARTHOUT, BRENT
• Application Number:
  US10/219,811
• Publication Number:
  US 20030071719A1
• Time in Patent Office: 1,215 Days
• Field of Search: 340/310.01, 340/310.07, 340/310.08, 375/212, 370/485, 370/401, 370/407
• US Class Current: 375/260
• CPC Class Codes: H04B 2203/5433 Remote metering
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals

Abstract

A method and apparatus for modifying a three-phase power distribution network in a building in order to provide data communication by using a Power Line Carrier (PLC) signal to an approximate electrical central location point of the power distribution system remote from the data entry point of the building. A passive coupler device is attached to a centrally located service panel. The passive coupler receives the Power Line Carrier (PLC) signal from the remote entry point in the building and conditions the signal for entry at the service panel onto each phase of the three phase power distribution network.

Claims

1. A system for interfacing a communication device with a three-phase power network residing in a building, wherein the three-phase power network includes at least three power wires each corresponding to a respective phase of the three-phase power network, and wherein the three-phase power network also includes a first service panel located within the building, the system comprising:

an electronic network that includes one or more carrier current couplers each providing an electrical interface between the communication device and a respective power wire of the three-phase power network at the first service panel;

wherein the electronic network is configured to split a first communication signal received from the communication device and feed the split communication signal to each power wire of the three-phase power network at the first service panel through the one or more carrier current couplers such that the first communication signal can be effectively distributed throughout any portion of the building receiving at least one of the power wires.

2. The system according to claim 1, wherein the electronic network is coupled to the first service panel via a number of terminal blocks.

3. The system according to claim 1, wherein the communication device is a gateway.

4. The system according to claim 3, wherein the communication device is a gateway forming a hub-and-spoke network topology.

5. The system according to claim 4, wherein the communication device is configured to provide a broadband signal, and the electronic network is configured to split the broadband signal and feed it to each power wire of the three-phase power network.

6. The system according to claim 1, wherein the three-phase power network is fed from an external power source via a step-down transformer.

7. The system according to claim 6, wherein the electronic network receives the first communication signal from the communication device via a coaxial cable.

8. The system according to claim 1, wherein the service panel includes a cut-off switch.

9. The system according to claim 8, wherein the service panel further includes one of a fuse or circuit breaker.

10. The system according to claim 1, wherein the power network includes a plurality of service panels, and the first service panel is electrically the most centrally located of the service panels.

11. The system according to claim 7, wherein the electronic network further includes a one-to-three coaxial splitter, and wherein each of the carrier current couplers is electrically coupled to the splitter.

12. The system according to claim 1, wherein the electronic network is physically co-located with the service panel.

13. The system according to claim 1, wherein the power network employs voltages of at least 277 volts.

14. The system according to claim 1, wherein the power network employs voltages below 277 volts.

15. The system according to claim 1, wherein the electronic network has an electrical connection to the power wires at first service panel without any intervening power transformer.

16. A method for interfacing a communication device with a three-phase power network residing in a building, wherein the three-phase power network includes at least three power wires each corresponding to a respective phase of the three-phase power network, and wherein the three-phase power network also includes a first service panel located within the building, the method comprising:

receiving a first communication signal from a communication device;

splitting the communication signal into three portions; and

feeding the portions of the split communication signal to each power wire of the three-phase power network at the first service panel and within the building through one or more carrier current couplers such that the first communication signal can be effectively distributed throughout any portion of the building receiving at least one of the power wires;

wherein the power network is configured so as to distribute power throughout the building in a roughly balanced fashion among the three power wires.

17. The method according to claim 16, wherein the communication device is a gateway.

18. The method according to claim 16, wherein the communication device is a hub forming a hub-and-spoke network topology.

19. The method according to claim 18, wherein the communication device is configured to provide a broadband signal, and the electronic network is configured to split the broadband signal and feed it to each power wire of the three-phase power network.

20. The method according to claim 16, wherein the three-phase power network is fed from an external power source via a step-down transformer.

21. The method according to claim 20, wherein the service panel includes a cut-off switch.

22. The method according to claim 20, wherein the service panel further includes one of a fuse or circuit breaker.

23. The method according to claim 16, wherein the power network includes a plurality of service panels, and the first service panel is electrically the most centrally located of the service panels.

24. The method according to claim 16, wherein the power network employs voltages of at least 277 volts.

25. The method according to claim 16, wherein the power network employs voltages below 277 volts.

26. A system for interfacing a communication device with a three-phase power network residing in a building, wherein the three-phase power network includes at least three power wires each corresponding to a respective phase of the three-phase power network, and wherein the three-phase power network also includes a first service panel located within the building, the system comprising:

an electronic network that includes one or more carrier current couplers each providing an electrical interface between the communication device and a respective power wire of the three-phase power network;

wherein the electronic network is configured to split a first communication signal received from the communication device and feed the split communication signal to each power wire of the three-phase power network at the first service panel through the one or more carrier current couplers such that the first communication signal can be effectively distributed throughout any portion of the building receiving at least one of the power wires; and

wherein the electronic network is located inside the building in physical proximity to the first service panel.

27. The system according to claim 26, wherein the communication device is a gateway.

28. The system according to claim 27, wherein the communication device is a gateway forming a hub-and-spoke network topology.

29. The system according to claim 28, wherein the communication device is configured to provide a broadband signal, and the electronic network is configured to split the broadband signal and feed it to each power wire of the three-phase power network.

30. The system according to claim 29, wherein the power network includes a plurality of service panels, and the first service panel is electrically the most centrally located of the service panels.

31. The system according to claim 29, wherein the power network employs voltages below 277 volts.