Method and system for virtual powerline local area networks

• US 7,769,908 B2
• Filed: 03/25/2008
• Issued: 08/03/2010
• Est. Priority Date: 10/03/2003
• Status: Expired due to Fees

• Current Assignee: Asoka USA Corporation (Asoka)
• Original Assignee: Asoka USA Corporation (Asoka)
• Inventors: Mu, Songly, Chan, Tat Kueng
• Primary Examiner(s): Walsh; John B.
• Application Number:
  US12/055,084
• Publication Number:
  US 20080215762A1
• Time in Patent Office: 861 Days
• Field of Search: None
• US Class Current: 709/250
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 2203/5441 Wireless systems or telephone
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5479 using repeaters
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• 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: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

Method and system for virtual powerline local area networks. An embodiment of the present invention provides system for powerline networking. The system includes an external data source, the data source being derived from a world wide networks of computers. The system includes a router coupled to the external data source and coupled to a first datasource connection. The system includes a powerline network apparatus. The apparatus includes a second datasource connection coupled to the first datasource connection, a powerline device coupled to the second datasource connection, and a virtual local area network device that is configured to limit data forwarding between an end user and a downstream network connection.

Claims

1. A system comprising:

an external data source derived from a network of computers;

a router coupled to the external data source and coupled to a first data-source connection;

a powerline network apparatus, comprising;

a second data-source connection coupled to the first data-source connection;

a powerline device coupled to the second data-source connection, the powerline device being adapted to receive and transmit information in a first format from and to the second data-source connection and adapted to receive and transmit information in a second format;

a virtual local area network device including a first input/output port and a plurality of second input/output ports, the virtual local area network device being coupled to the powerline device through the first input/output port, each of the plurality of second input/output ports being configured to serve one or more end-users devices and numbered from 1 through N, where N is an integer greater than 1, the virtual local area network device being configured to limit data forwarding between an end user and a downstream network connection;

a plurality of modem devices coupled to the virtual local area network device, the plurality of modem devices numbered from 1 through N, each of the plurality of modem devices being coupled respectively to one of the plurality of second input/output ports, each of the plurality of modem devices also being coupled to one of a plurality of powerlines numbered from 1 through N, each of the plurality of powerlines being capable of communicating information to and from the second data-source connection.

2. The system of claim 1 wherein each of the second input/output ports corresponds respectively to each of a plurality of users numbered from 1 through N.

3. The system of claim 1 wherein the plurality of powerlines comprises a power grid formed within at least a building structure.

4. The system of claim 1 wherein the data source is formatted using an OFDM format.

5. The system of claim 1 wherein the first format is OFDM and the second format is MII.

6. The system of claim 1 wherein the second format is a serial format.

7. The system of claim 1 wherein the powerline device is a powerline modem.

8. The system of claim 1 wherein each of the plurality of powerlines is maintained at a preselected voltage and preselected frequency.

9. The system of claim 8 wherein the preselected voltage ranges from about 100 to 120 volts and preselected frequency ranges from 50 through 60 Hz.

10. The system of claim 8 wherein the preselected voltage ranges from 85 to 265 volts and preselected frequency ranges from 50 through 60 Hz.

11. The system of claim 1 wherein each of the plurality of powerlines is a coaxial cable.

12. The system of claim 11 wherein the powerline network apparatus is a powerline communication virtual local area network (PLC VLAN) switch in a cascaded deployment with one other PLC VLAN switch.

13. The system of claim 12 wherein each PLC VLAN switch comprises a plurality of input/output ports numbered from 1 through N where N is a integer larger than 1, each of the plurality of input/output ports using a different NEK and at least one output port NEK being used to couple to the other PLC VLAN switch in the cascaded deployment.

14. The system of claim 1 wherein each of the second input/output ports corresponds respectively to each of a plurality of users numbered from 1 through N.

15. The system of claim 1 wherein the router includes a network encryption key (NEK), the powerline network apparatus is configured to use the NEK, and the virtual local area network device is enabled with the NEK.

16. The system of claim 15 wherein each of the second input/output ports corresponds respectively to each of a plurality of users numbered from 1 through N.

17. The system of claim 16 wherein each of the second input/output ports connects to a corresponding user'"'"'s powerline device with a different NEK.

18. An apparatus comprising:

a data-source connection;

a powerline device coupled to the data-source connection, the powerline device being adapted to receive and transmit information in a first format from and to the data-source connection and adapted to receive and transmit information in a second format;

a virtual local area network device including a first input/output port and a plurality of second input/output ports, the virtual local area network device being coupled to the powerline device through the first input/output port, each of the plurality of second input/output ports being configured to serve one or more end-user devices and numbered from 1 through N, where N is an integer greater than 1, the virtual local area network device being configured to limit data forwarding between an end user and a downstream network connection;

a plurality of modem devices coupled to the virtual local area network device, the plurality of modem devices numbered from 1 through N, each of the plurality of modem devices being coupled respectively to one of the plurality of second input/output ports, each of the plurality of modem devices also being coupled to one of a plurality of powerlines numbered from 1 through N, each of the plurality of powerlines being capable of communicating information to and from the data source.

19. Apparatus of claim 18 wherein the data source is a modem, the modem coupled to a communication network.

20. Apparatus of claim 18 further comprising a repeater coupled to at least one of the plurality of powerlines, the repeater being adapted to amplify a signal associated with the information from the data source.

21. Apparatus of claim 18 wherein the data-source connection includes a powerline connection and an Ethernet connection.

22. Apparatus of claim 18 wherein the data-source connection is a two wire connection.

23. Apparatus of claim 18 wherein each of the second input/output ports corresponds respectively to each of a plurality of users numbered from 1 through N.

24. Apparatus of claim 18 wherein the plurality of powerlines comprises a power grid formed within at least a building structure.

25. Apparatus of claim 18 wherein the data source is formatted using an OFDM format.

26. Apparatus of claim 18 wherein the first format is OFDM and the second format is MII.

27. Apparatus of claim 18 wherein the second format is a serial format.

28. Apparatus of claim 18 wherein the powerline device is a powerline modem.

29. Apparatus of claim 18 wherein each of the plurality of powerlines is maintained at a preselected voltage and preselected frequency.

30. Apparatus of claim 29 wherein the preselected voltage ranges from about 100 to 120 volts and preselected frequency ranges from 50 through 60 Hz.

31. Apparatus of claim 29 wherein the preselected voltage ranges from 85 to 265 volts and preselected frequency ranges from 50 through 60 Hz.

32. Apparatus of claim 18 wherein each of the plurality of powerlines is a coaxial cable.

33. The apparatus of claim 18 comprising a powerline communication virtual local area network (PLC VLAN) switch in a cascaded deployment with one other PLC VLAN switch.

34. The apparatus of claim 18 wherein the virtual local area network device is enabled with a network encryption key (NEK).

35. The apparatus of claim 34 comprising a powerline communication virtual local area network (PLC VLAN) switch in a cascaded deployment with one other PLC VLAN switch.

36. Apparatus of claim 35 wherein each PLC VLAN switch comprises a plurality of input/output ports numbered from 1 through N where N is a integer larger than 1, each of the plurality of input/output ports using a different network encryption key (NEK) and at least one output port NEK being used to couple to next PLC VLAN switch in the cascaded deployment.

37. A method comprising:

coupling a powerline router to a data source through a data-source connection, the powerline router being enabled with a first network encryption key (NEK);

forming a first virtual local area network (VLAN) via powerlines, the first VLAN being associated with a first VLAN device and a first plurality of end user devices, the first plurality of end user devices coupled to the first VLAN device respectively through a first plurality of input/output ports, the first VLAN device coupled to the powerline router via a powerline device and being enabled with the first NEK for communicating with the data source;

receiving/transmitting data encrypted at least by the first NEK between one of the first plurality of end user devices and the data source;

forming a second VLAN coupled to the first VLAN, the second VLAN being associated with a second VLAN device and a second plurality of end user devices, the second plurality of end user devices coupled to the second VLAN device respectively through a second plurality of input/output ports, the second VLAN device being enabled with a second NEK for communicating with the first VLAN device;

receiving/transmitting data encrypted at least by the second NEK between one of the second plurality of end user devices and the data source;

wherein each of the second plurality of end user devices associated with the second VLAN is inaccessible to any one of the first plurality of end user devices associated with the first VLAN.

38. The method of claim 37, further comprising:

using non-encrypted data for internal communication within each VLAN;

separating end user devices by limiting forwarding of data between the each end user device and the data source and between end user devices within each VLAN.

39. The method of claim 37 wherein the forming a second VLAN coupled to the first VLAN comprises cascading the second VLAN device via a powerline device to one of the first plurality of input/output ports enabled with the second NEK.

40. The method of claim 37 wherein the second NEK and the first NEK are different.

41. The method of claim 37 wherein the second NEK and the first NEK are the same.