PLC breaker bridge

• US 7,463,877 B2
• Filed: 03/17/2006
• Issued: 12/09/2008
• Est. Priority Date: 01/21/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Iwamura, Ryuichi
• Primary Examiner(s): Corsaro; Nick
• Assistant Examiner(s): Magloire; Vladimir
• Application Number:
  US11/378,022
• Publication Number:
  US 20060187023A1
• Time in Patent Office: 998 Days
• Field of Search: 455/41.1, 455/41, 455/402, 455/270
• US Class Current: 455/402
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5491 using filtering and bypassing
• 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
• CPC Class Codes: H04L 12/2832 Interconnection of the control functionalities between home networks single bridge functionality H04L12/4625
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 12/40019 Details regarding a bus master
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/4035 in which slots of a TDMA packet structure are assigned based on a contention resolution carried out at a master unit TDM/TDMA multiplex systems per se H04J3/1694; hybrid switching systems H04L12/64
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

Abstract

In accordance with certain embodiments consistent with the invention, a power line communication (PLC) bridge circuit, consistent with certain embodiments, has a first coupler that couples data signals to and from a main power line circuit. A second coupler couples data signals to and from a branch power line circuit, wherein the branch power line circuit is branched from the main power line circuit. A first communication transceiver is connected to the first coupler for transferring data signals to and from the first coupler. A second communication transceiver is connected to the second coupler for transferring data signals to and from the second coupler. A controller examines data signals from the first transceiver and determines if the data is destined for the second transceiver, so that data that is not destined for the second transceiver is considered local data. The controller also examines data signals from the second transceiver and determines if the data is destined for the first transceiver, so that data that is not destined for the first transceiver is also considered local data. A bridge passes data signals between the first communication transceiver and the second transceiver when the controller determines that the data is not local, and passes data signals between the first communication transceiver and the second communication transceiver when the controller determines that the data is local. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

Claims

1. A power line communication (PLC) bridge circuit, comprising:

a plurality of branch power line circuits branching from a main power line circuit;

a main coupler that couples data signals to and from the power line circuit to and from each of the branch power line circuits, wherein alternating current power is provided to the main power line through a watt-hour meter;

a main blocking filter that prevents signals in a frequency range of the data signals from reaching the watt-hour meter;

a first and a second branch coupler that couples data signals to and from first and second ones of the branch power line circuits;

a first and a second branch blocking filter that prevents signals in the frequency range of the data signals from entering or exiting the first and second branch power line circuits respectively;

a first communication transceiver connected to the first branch coupler for transferring data signals to and from the first branch coupler;

a second communication transceiver connected to the second branch coupler for transferring data signals to and from the second branch coupler;

a controller that examines data signals from the first transceiver and determines if the data is destined for the second transceiver, wherein data that is not destined for the second transceiver is considered local data;

the controller further examines data signals from the second transceiver and determines if the data is destined for the first transceiver, wherein data that is not destined for the first transceiver is also considered local data;

bridging means for passing data signals between the first communication transceiver and the second transceiver when the controller determines that the data is not local, and for not passing data signals between the first communication transceiver and the second communication transceiver when the controller determines that the data is local; and

wherein the controller and the bridging means are housed within a housing that contains a circuit breaker.

2. The power line communication bridge circuit in accordance with claim 1, wherein the main blocking filter and the main coupler are housed within a housing that contains a main circuit breaker.

3. The power line communication bridge circuit in accordance with claim 1, further comprising a branch circuit breaker, coupled between the main power line circuit and one of the branch power line circuits.

4. The power line communication bridge circuit in accordance with claim 1, wherein the main coupler couples PLC data between power legs of the main power line circuit.

5. The power line communication bridge circuit in accordance with claim 1, wherein the main coupler and the main blocking filter are situated within a main power line circuit breaker.

6. The power line communication bridge circuit in accordance with claim 1, wherein the bridging means for passing data signals comprises a common bus shared by the first and second communication transceivers, wherein the common bus is controlled by the controller.

7. The power line communication bridge circuit in accordance with claim 1, wherein the first and second communication transceivers comprise orthogonal frequency division multiplexing (OFDM) transceivers.

8. The power line communication bridge circuit in accordance with claim 1, wherein the first and second communication transceivers comprise HomePlug®

standard compliant transceivers.

9. The power line communication bridge circuit in accordance with claim 1, wherein the controller identifies at least one of an available time slot and an available frequency for passing the data signal between the first and second communication transceivers.

10. The power line communication bridge circuit in accordance with claim 1, further comprising a beacon generator that generates beacon signals transmitted over the first and second power line circuits, wherein the power line communication bridge circuit serves as a master in the PLC network.

11. The power line communication bridge circuit in accordance with claim 1, wherein the controller determines whether or not the data is local by consulting a device table.

12. The power line communication bridge circuit in accordance with claim 1, wherein said first and second branch blocking filters comprise low pass filters.

13. A power line communication (PLC) bridge circuit, comprising:

a plurality of branch power line circuits branching from a main power line circuit;

a main coupler that couples data signals to and from the power line circuit to and from each of the branch power line circuits, wherein alternating current power is provided to the main power line through a watt-hour meter;

a main blocking filter that prevents signals in a frequency range of the data signals from reaching the watt-hour meter;

a first and a second branch coupler that couples data signals to and from first and second ones of the branch power line circuits;

a first and a second branch blocking filter that prevents signals in the frequency range of the data signals from entering or exiting the first and second branch power line circuits respectively;

a first communication transceiver connected to the first branch coupler for transferring data signals to and from the first branch coupler;

a second communication transceiver connected to the second branch coupler for transferring data signals to and from the second branch coupler;

wherein the first and second communication transceivers comprise HomePlug®

standard compliant transceivers;

a controller that examines data signals from the first transceiver and determines if the data is destined for the second transceiver, wherein data that is not destined for the second transceiver is considered local data;

the controller further examines data signals from the second transceiver and determines if the data is destined for the first transceiver, wherein data that is not destined for the first transceiver is also considered local data;

a common bus shared by the first and second communication transceivers, wherein the common bus is controlled by the controller;

wherein the controller further passes data signals over the common bus between the first communication transceiver and the second transceiver when the controller determines that the data is not local, and for not passing data signals between the first communication transceiver and the second communication transceiver when the controller determines that the data is local, wherein the controller determines whether or not the data is local by consulting a device table;

wherein the controller identifies at least one of an available time slot and an available frequency for passing the data signal between the first and second communication transceivers; and

a circuit breaker, coupled between the main power line circuit and one of the first and second branch power line circuits, wherein the bridge circuit is housed within a housing that contains the circuit breaker.

14. A power line communication (PLC) bridge circuit, comprising:

a plurality of branch power line circuits branching from a main power line circuit;

a main coupler that couples data signals to and from the power line circuit to and from each of the branch power line circuits, wherein alternating current power is provided to the main power line through a watt-hour meter;

a main blocking filter that prevents signals in a frequency range of the data signals from reaching the watt-hour meter;

a first and a second branch coupler that couples data signals to and from first and second ones of the branch power line circuits;

a first and a second branch blocking filter that prevents signals in the frequency range of the data signals from entering or exiting the first and second branch power line circuits respectively;

a first communication transceiver connected to the first branch coupler for transferring data signals to and from the first branch coupler;

a second communication transceiver connected to the second branch coupler for transferring data signals to and from the second branch coupler;

a controller that examines data signals from the first transceiver and determines if the data is destined for the second transceiver, wherein data that is not destined for the second transceiver is considered local data;

the controller further examines data signals from the second transceiver and determines if the data is destined for the first transceiver, wherein data that is not destined for the first transceiver is also considered local data;

bridging means for passing data signals between the first communication transceiver and the second transceiver when the controller determines that the data is not local, and for not passing data signals between the first communication transceiver and the second communication transceiver when the controller determines that the data is local; and

a first branch circuit breaker, coupled between the main power line circuit and the first branch power line circuit, wherein the bridge circuit and the controller are housed within a housing that contains a circuit breaker.

15. The power line communication bridge circuit in accordance with claim 14, wherein the means for passing data signals comprises a common bus shared by the first and second communication transceivers, wherein the common bus is controlled by the controller.

16. The power line communication bridge circuit in accordance with claim 14, wherein the first and second communication transceivers comprise orthogonal frequency division multiplexing transceivers.

17. The power line communication bridge circuit in accordance with claim 14, wherein the first and second communication transceivers comprise HomePlug®

standard compliant transceivers.

18. The power line communication bridge circuit in accordance with claim 14, wherein the controller identifies at least one of an available time slot and an available frequency for passing the data signal between the first and second communication transceivers.

19. The power line communication bridge circuit in accordance with claim 18, further comprising a beacon generator that generates beacon signals transmitted over the first and second power line circuits, wherein the power line communication bridge circuit serves as a master in the PLC network.

20. The power line communication bridge circuit in accordance with claim 14, wherein the controller determines whether or not the data is local by consulting a device table.

21. The power line communication bridge circuit in accordance with claim 14, further comprising a filter that isolates the first and second power line circuits from each other at frequencies used for power line communication.

22. A power line communication (PLC) bridging method, comprising:

providing a plurality of branch power line circuits branching from a main power line circuit;

coupling data signals to and from each of the branch power line circuits, wherein alternating current power is provided to the main power line through a watt-hour meter;

preventing signals in a frequency range of the data signals from reaching the watt-hour meter;

examining data signals from the branch power line circuit to determine if the data is destined for the branch power line circuit, and if so not passing the data to the main power line circuit, and if not then passing data to the main power line circuit; and

examining data signals from the main power line circuit to determine if the data is destined for the branch power line circuit, wherein if the data is destined for the branch power line circuit then passing the data to the branch power line circuit and if not, the then not passing data to the branch power line circuit.

23. The power line communication method in accordance with claim 22, wherein the data signals are passed over a common bus shared by first and second communication transceivers.

24. The power line communication method in accordance with claim 23, wherein the data signals comprise orthogonal frequency division multiplexing signals.

25. The power line communication method in accordance with claim 23, wherein the data signals comprise HomePlug®

standard compliant data signals.

26. The power line communication method in accordance with claim 22, further comprising identifying at least one of an available time slot and an available frequency for passing the data signal between the first and second power line circuit.

27. The power line communication method in accordance with claim 22, wherein the destination of the data is determined by consulting a device table.

28. The power line communication method in accordance with claim 22, further comprising determining if an amount of current passing to the branch circuit exceeds a threshold, and if so, opening a circuit breaker.

29. The power line communication method according to claim 22, carried out within a device that houses both a circuit breaker and a power line communication bridge.

30. The power line communication method according to claim 29, wherein the device that houses both the circuit breaker and the power line communication bridge comprises a circuit breaker module housing.

31. A computer readable storage medium storing instructions which, when executed on a programmed processor, carry out a process in accordance with claim 22.