Method and apparatus for processing outbound data within a powerline based communication system

• US 7,173,938 B1
• Filed: 05/18/2001
• Issued: 02/06/2007
• Est. Priority Date: 05/18/2001
• Status: Expired due to Term

• Current Assignee: Current Grid, LLC
• Original Assignee: Current Grid, LLC
• Inventors: Davidow, Clifford A.
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): Murphy, Rhonda
• Application Number:
  US09/860,262
• Time in Patent Office: 2,090 Days
• Field of Search: 370/400, 370/401, 370/465, 370/466, 340/310.01, 340/310.02
• US Class Current: 370/401
• CPC Class Codes: H04B 2203/5441 Wireless systems or telephone
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 3/542 the information being in digital form

Abstract

A powerline based communication system includes a powerline termination module, a plurality of powerline gateways, and a plurality of powerline nodes. The powerline termination module manages data for local area networks within the powerline based communication system. The plurality of powerline gateways is arranged in sets of powerline gateways, wherein each set of powerline gateways constitutes a local area network. Each of the plurality of powerline nodes is operably coupled to the powerline termination module via a high-speed communication path. In addition, each powerline node is operably coupled to set of powerline gateways, i.e., to a local area network, via powerlines of a local transformer. Each of the powerline nodes receives data from the powerline gateways of its LAN via the powerlines of the local transformer and provides the data to the powerline termination module via the high-speed communication path.

Claims

1. A powerline based communication system comprises:

powerline termination module operably coupled to manage data for at least a portion of the powerline based communication system, wherein the at least a portion of the powerline based communication system includes a plurality of local area networks;

a plurality of powerline gateways that is arranged in sets of powerline gateways, wherein each set of powerline gateways constitutes a corresponding one of the plurality of local area networks; and

a plurality of powerline nodes operably coupled to the powerline termination module via a high-speed communication path and operably coupled to the plurality of powerline gateways via powerlines, wherein a first powerline node of the plurality of powerline nodes is operably coupled, via powerlines of a first local transformer, to a first set of the powerline gateways constituting a first corresponding local area network of the plurality of local area networks, wherein the first powerline node receives first local area network data of the data from the first set of powerline gateways via the powerlines of the first local transformer and provides the first local area network data to the powerline termination module via the high-speed communication path; and

wherein said first power line node includes a local routine module configured to route data of the first set of power line gateways.

2. The powerline based communication system of claim 1, wherein each of the powerline gateways in the first set of powerline gateways comprises:

AC coupling module operably coupled to receive outbound modulated data from the powerlines of the first local transformer;

demodulation module operably coupled to demodulate the received outbound modulated data based on a demodulation protocol to produce demodulated data;

data processing module operably coupled to process the demodulated data based on a desired communication convention to produce retrieved user data; and

transmitting module operably coupled to provide the retrieved user data to a user of the first corresponding local area network.

3. The powerline based communication system of claim 2, wherein each of the powerline gateways in the first set of powerline gateways comprises:

a splitter operably coupled to separate the outbound modulated data from inbound modulated data on the powerlines of the first local transformer.

4. The powerline based communication system of claim 2, wherein the desired communication convention comprises at least one of:

carrier sense multiple access (CSMA), CSMA with collision avoidance, CSMA with collision detection, encryption, and buffering.

5. The powerline based communication system of claim 2, wherein the demodulate protocol comprises at least one of:

orthogonal frequency division multiplexing, and code division multiple access.

6. The powerline based communication system of claim 1, wherein the first powerline node comprises:

AC coupling module operably coupled to receive the local area network data as outbound modulated data from at least one of the first set of powerline gateways via the powerlines of the first local transformer;

demodulation module operably coupled to demodulate the received outbound modulated data based on a demodulation protocol to produce demodulated data;

data processing module operably coupled to process the demodulated data based on a desired communication convention to produce retrieved local area network data; and

transmitting module operably coupled to transmit the retrieved local area network data to the powerline termination module via the high-speed communication path.

7. The powerline based communication system of claim 6, wherein the first powerline node comprises:

a splitter operably coupled to separate inbound modulated data from the outbound modulated data on the powerlines of the first local transformer.

8. The powerline based communication system of claim 6, wherein the data processing module of the first powerline node comprises:

demapping module operably coupled to demap the local area network data from frequency bins within a frequency range of interest based on channel response of the powerlines to produce the processed data.

9. The powerline based communication system of claim 6, wherein the data processing module of the first powerline node comprises:

local data processing module operably coupled to receive local data of the local area network data from a local user affiliated with the first powerline node, wherein the at least a portion of the processed data is exclusive of the local data; and

wherein said local routing module is operably coupled to route the local data to the high-speed communication path.

10. The powerline based communication system of claim 6, wherein the first powerline node comprises:

a local powerline gateway of the first set of the powerline gateways of the first local area network to support a local user affiliated with the first powerline node.

11. The powerline based communication system of claim 6, wherein the demodulation module of the first powerline node comprises:

ranging module operably coupled to compensate for variations in line impedance of the powerlines of the local transformer.

12. The powerline based communication system of claim 6, wherein the demodulation module of the first powerline node comprises:

multi-path module operably coupled to compensate for multi-path error of the powerlines of the local transformer.

13. The powerline based communication system of claim 1 further comprises:

AC coupling capacitor operably coupled to a second local transformer, wherein the second local transformer is operably coupled to a second set of the powerline gateways constituting a second local area network of the plurality of local area networks via powerlines of the second local transformer, and wherein the first powerline node receives second local area network data of the data from the second set of powerline gateways via the powerlines of the second local transformer and provides the second local area network data to the powerline termination module via the high-speed communication path.

14. The powerline based communication system of claim 1, wherein the plurality of powerline nodes further comprises:

a second powerline node operably coupled, via powerlines of a second local transformer, to a second set of the powerline gateways constituting a second corresponding local area network of the plurality of local area networks, wherein the second powerline node receives second local area network data of the data from the second set of powerline gateways via the powerlines of the second local transformer and provides the second local area network data to the powerline termination module via a second high-speed communication path.

15. The powerline based communication system of claim 1, wherein the powerline termination module further comprises:

communication network interface operably coupled to transmit the data to a communication network; and

user database operable to maintain a listing of users of the powerline based communication system.

16. A powerline based local area communication network system comprises:

a plurality of powerline gateways that is arranged as a local area network; and

a powerline node operably coupled to the plurality of powerline gateways via powerlines of a local transformer, wherein the powerline node receives local area network data from the plurality of powerline gateways via the powerlines of the local transformer and provides the local area network data to a non-powerline high-speed communication path; and

wherein said power line node comprises a local routing module configured to route data to the power line gateways.

17. The powerline based local area communication network system of claim 16, wherein each of the plurality of powerline gateways comprises:

AC coupling module operably coupled to receive outbound modulated data from the powerlines of the local transformer;

demodulation module operably coupled to demodulate the received outbound modulated data based on a demodulation protocol to produce demodulated data;

data processing module operably coupled to process the demodulated data based on a desired communication convention to produce retrieved user data; and

transmitting module operably coupled to provide the retrieved user data to a user of the local area network.

18. The powerline based local area communication system of claim 17, wherein each of the plurality of powerline gateways comprises:

a splitter operably coupled to separate the outbound modulated data from inbound modulated data on the powerlines of the local transformer.

19. The powerline based local area communication system of claim 16, wherein the powerline node comprises:

AC coupling module operably coupled to receive the local area network data as outbound modulated data from at least one of the first set of powerline gateways via the powerlines of the first local transformer;

demodulation module operably coupled to demodulate the received outbound modulated data based on a demodulation protocol to produce demodulated data;

data processing module operably coupled to process the demodulated data based on a desired communication convention to produce retrieved local area network data; and

transmitting module operably coupled to transmit the retrieved local area network data to the powerline termination module via the high-speed communication path.

20. The powerline based local area communication system of claim 19, wherein the powerline node comprises:

a splitter operably coupled to separate inbound modulated data from the outbound modulated data on the powerlines of the local transformer.

21. The powerline based local area communication system of claim 19, wherein the data processing module of the powerline node comprises:

demapping module operably coupled to demap the local area network data from frequency bins within a frequency range of interest based on channel response of the powerlines to produce the processed data.

22. The powerline based local area communication system of claim 19, wherein the data processing module of the powerline node comprises:

local data processing module operably coupled to receive local data of the local area network data from a local user affiliated with the first powerline node, wherein the at least a portion of the processed data is exclusive of the local data; and

wherein said local routing module is operably coupled to route the local data to the high-speed communication path.

23. The powerline based local area communication system of claim 19, wherein the powerline node comprises:

a local powerline gateway of the plurality of the powerline gateways to support a local user affiliated with the powerline node.

24. The powerline based local area communication system of claim 19, wherein the demodulation module of the first powerline node comprises:

ranging module operably coupled to compensate for variations in line impedance of the powerlines of the local transformer.

25. The powerline based local area communication system of claim 19, wherein the demodulation module of the first powerline node comprises:

multi-path module operably coupled to compensate for multi-path error of the powerlines of the local transformer.

26. A method for providing broadband communication over powerlines, the method comprises:

receiving outbound modulated data via AC coupling to powerlines of a local transformer, wherein the outbound modulated data is associated with at least one user of a plurality of users in a local area network, wherein the plurality of users is operably coupled together via the powerlines of the local transformer;

demodulating the received outbound modulated data based on a demodulation protocol to produce demodulated data;

processing the demodulated data based on a desired communication convention to produce retrieved data;

providing the retrieved data to a communication path;

receiving inbound data;

identifying local data of the inbound data that addresses a local user of a plurality of users; and

routing the identified local data to the local user via the powerlines of the local transformer.

27. The method of claim 26, wherein the demodulating the received outbound modulated data further comprises at least one of:

orthogonal frequency division demultiplexing of the received outbound modulated data; and

spread spectrum demodulation the received outbound modulated data.

28. The method of claim 26, wherein the processing of the demodulated data further comprises:

demultiplexing the demodulated data within the frames based on division demultiplexing of the frames among the plurality of users.

29. The method of claim 26, wherein the processing the demodulated data further comprises at least one of:

decrypting the demodulated data based on decryption protocol of the at least one user to produce the retrieved data; and

buffering the demodulated data to produce the retrieved data.

30. The method of claim 26, wherein the processing the demodulated data further comprises:

identifying local data of the demodulated data that addresses a local user of a plurality of users; and

routing the local data to the local user via a local communication path.

31. The method of claim 26, wherein the processing the demodulated data further comprises:

demapping the demodulated data from frequency bins within the frequency range of interest based on a channel response of the powerlines to produce the retrieved data.

32. The method of claim 26, wherein the providing of the retrieved data further comprises:

providing the retrieved data via the communication path to a utility network that couples a plurality of substations to a control center.

33. The method of claim 26, wherein the providing the retrieved data further comprises:

providing the retrieved data in packets via a high-speed communication path that is operably coupled to a communication network.

34. The method of claim 26, wherein the providing the retrieved data further comprises:

providing the retrieved data in frames via a high-speed communication path that is operably coupled to a communication network.

35. The method of claim 26, wherein the processing the demodulated data further comprises:

compensating for variations in line impedance of the powerlines.

36. The method of claim 26, wherein the processing the demodulated data further comprises:

compensating for multi-path error of the powerlines.

37. An apparatus for providing broadband communication over a powerline, the apparatus comprises:

processing module; and

memory operably coupled to the processing module, wherein the memory further comprises operational instructions that cause the processing module to;

receive outbound modulated data via AC coupling to powerlines of a local transformer, wherein the outbound modulated data is associated with at least one user of a plurality of users in a local area network, wherein the plurality of users is operably coupled together via the powerlines of the local transformer;

demodulate the received outbound modulated data based on a demodulation protocol to produce demodulated data;

process the demodulated data based on a desired communication convention to produce retrieved data;

provide the retrieved data to a communication path;

receive inbound data;

identify local data of the inbound data that addresses a local user of a plurality of users; and

route the identified local data to the local user via the powerlines of the local transformer.

38. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to demodulate the received outbound modulated data by at least one of:

orthogonal frequency division demultiplexing of the received outbound modulated data; and

spread spectrum demodulation the received outbound modulated data.

39. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to process the demodulated data by:

demultiplexing the demodulated data within the frames based on division demultiplexing of the frames among the plurality of users.

40. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to process the data by at least one of:

decrypting the demodulated data based on decryption protocol of the at least one user to produce the retrieved data; and

buffering the demodulated data to produce the retrieved data.

41. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to process the data by:

identifying local data of the demodulated data that addresses a local user of a plurality of users; and

routing the local data to the local user via a local communication path.

42. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to process the data by:

demapping the demodulated data from frequency bins within the frequency range of interest based on a channel response of the powerlines to produce the retrieved data.

43. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to provide the retrieved data by:

providing the retrieved data via the communication path to a utility network that couples a plurality of substations to a control center.

44. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to provide the retrieved data by:

providing the retrieved data in packets via a high-speed communication path that is operably coupled to a communication network.

45. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to provide the retrieved data by:

providing the retrieved data in frames via a high-speed communication path that is operably coupled to a communication network.

46. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to compensate for variations in line impedance of the powerlines.

47. The apparatus of claim 37, wherein memory further comprises operational instructions that cause the processing module to compensate for multi-path error of the powerlines.