Virtual gateway system and method

• US 6,414,952 B2
• Filed: 10/10/1997
• Issued: 07/02/2002
• Est. Priority Date: 08/28/1997
• Status: Expired due to Term

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Foley, Peter F.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Pezzlo, John
• Application Number:
  US08/948,687
• Publication Number:
  US 20010012319A1
• Time in Patent Office: 1,726 Days
• Field of Search: 370/401, 370/206, 370/264, 370/344, 370/353, 370/352, 370/421, 370/494, 370/259, 370/389, 370/355, 375/295, 375/168.1, 375/211, 375/222, 348/7, 348/10, 709/227, 709/230, 709/246, 379/89, 379/221.08, 379/93.14, 705/34, 725/81
• US Class Current: 370/352
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 7/0069 comprising a residential gateway, e.g. those which provide an adapter for POTS or ISDN terminals
• CPC Class Codes: H04N 7/106 for domestic distribution
• CPC Class Codes: H04N 7/108 the cable being constituted by a pair of wires

Abstract

Existing (already installed) plain old telephone service (POTS) wiring at a customer premises is used as the wiring infrastructure for a local area network and additionally continues to provide ordinary POTS services at the customer premises. The network signals associated with the local area network and the POTS signals delivering POTS services coexist on the POTS wiring at the customer premises using frequency division multiplexing. In additional to POTS service, the subscriber loop also provides access to xDSL (digital subscriber line) signals associated with a wide area network (WAN). Thus three distinct networks (the PSTN associated with POTS, xDSL and the LAN)) coexist on a single wiring infrastructure. A virtual gateway provides for communication between each of the distinct networks without breaking the electrical continuity of the POTS wiring at the customer premises and thus maintaining lifeline POTS services, without the installation of a new dedicated active (needing AC current) Gateway device, and without the need to pull new cable to implement the premises LAN.

Claims

1. A virtual gateway system for providing bi-directional communication between a customer premises network and a second device network, each network sharing at a customer premises a communication channel, the communication channel having a first spectral band and a second spectral band associated with the customer premises network and the second device network respectively, the system comprising:

a customer premises gateway server operatively coupled to the communication channel, the customer premises gateway server including;

a first modem associated with the customer premises network, having;

a receive portion having an input coupled to the communication channel, the receive portion for converting information in the spectral band associated with the customer premises network to baseband; and

a transmit portion having an output coupled to the communication channel, the transmit portion for converting baseband information to the spectral band associated with the customer premises network;

a second modem associated with the second device network, having;

a receive portion having an input coupled to the communication channel for converting information in the spectral band associated with the second device network to baseband; and

a transmit portion having an output coupled to the communication channel, the transmit portion for converting baseband information to the spectral band associated with the second device network; and

a baseband communication channel coupled to the first modem and to the second modem for communicating baseband signals between the first modem and the second modem.

2. The system of claim 1 further comprising:

a network protocol translator coupled to the baseband communication channel for translating baseband information from a first protocol associated with the customer premises network to a second protocol associated with the second device network.

3. The system of claim 1 wherein the communication channel is unshielded twisted pair wiring coupled to a telephone central office by a subscriber loop.

4. The system of claim 3 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is a digital subscriber line (xDSL) network.

5. The system of claim 4 wherein the xDSL is an asymmetrical digital subscriber line (ADSL).

6. The system of claim 3 wherein both the first modem and the second modem are located at a single server device.

7. The system of claim 1 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is an integrated services digital network (ISDN) wide area network.

8. The system of claim 1 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is a wide area network.

9. The system of claim 1 wherein the customer premises network is a first local area network and the second device network is a second local area network.

10. The system of claim 3 wherein the customer premises network is a first local area network and the second device network in a second local area network.

11. A virtual gateway system for providing bi-directional communication between a customer premises network and a second device network, each network sharing at a customer premises a communication channel, the communication channel having a first spectral band and a second spectral band associated with the computer premises network and second device network respectively, the system comprising:

a plurality of customer premises client devices each including;

a first modem associated with the customer premises network, having;

a receive portion having an input coupled to the communication channel, the receive portion for converting information in the spectral band associated with the customer premises network to baseband; and

a transmit portion having an output coupled to the communication channel, the transmit portion for converting baseband information to the spectral band associated with the customer premises network; and

a second modem associated with the second device network, each having;

a receive portion having an input coupled to the communication channel for converting information in the spectral band associated with the second device network to baseband; and

a transmit portion having an output coupled to the communication channel for converting baseband information to the spectral band associated with the second device network; and

a baseband communication channel coupled to the first modem and to the second modem for communicating baseband signals between the first modem and the second modem.

12. The system of claim 11 further comprising:

a network protocol translator coupled to the baseband communication channel for translating baseband information from a first protocol associated with the customer premises network to a second protocol associated with the second device network.

13. The system of claim 11 wherein the communication channel is unshielded twisted pair wiring coupled to a telephone central office by a subscriber loop.

14. The system of claim 13 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is a digital subscriber line (xDSL) network.

15. The system of claim 14 wherein the xDSL is an asymmetrical digital subscriber line (ADSL).

16. The system of claim 13 wherein both the first modem and the second modem are located at a single customer premises server device.

17. The system of claim 11 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is an integrated services digital network (ISDN) wide area network.

18. The system of claim 11 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is a wide area network.

19. The system of claim 11 wherein the customer premises network is a first local area network and the second device network is a second local area network.

20. The system of claim 13 wherein the customer premises network is a first local area network and the second device network is a second local area network.

21. A virtual gateway system for providing bi-directional communication between a customer premises network and a second device network, each network sharing at a customer premises a communication channel, the communication channel having a first spectral band and a second spectral band associated with the customer premises network and the second device network respectively, the system comprising:

a plurality of customer premises client devices each including;

a first modem associated with the customer premises network, having;

a receive portion having an input coupled to the communication channel, said receive portion for converting information in the spectral band associated with the customer premises network to baseband; and

a transmit portion having an output coupled to the communication channel, said transmit portion for converting baseband information to the spectral band associated with the customer premises network; and

a customer premises gateway server having a second modem having;

a receive portion having an input coupled to the communication channel, the receive portion for converting information in the spectral band associated with the second device network to baseband; and

a transmit portion having an input coupled to the communication channel, said transmit portion for converting baseband information to the spectral band associated with the second device network.

22. The system of claim 21 further comprising:

a network protocol translator coupled to the baseband communication channel for translating baseband information from a first protocol associated with a customer premises network to a second protocol associated with the second device network.

23. The system of claim 21 wherein the communication channel is unshielded twisted pair wiring coupled to a telephone central office by a subscriber loop.

24. The system of claim 23 wherein the customer premises network is a local area network having a plurality, of network clients and the second device network is provided by a digital subscriber line (xDSL) network.

25. The system of claim 24 wherein the xDSL is an asymmetrical digital subscriber line (ADSL).

26. The system of claim 23 wherein both the first modem and the second modem are located at a single customer premises server device.

27. The system of claim 21 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is an integrated services digital network (ISDN) wide area network.

28. The system of claim 21 wherein the customer premises network is a local area network having a plurality of network clients and the second device network is a wide area network.

29. The system of claim 21 wherein the customer premises network is a first local area network and the second device network is a second local area network.

30. The system of claim 23 wherein the customer premises network is a first local area network and the second device network is a second local area network.

31. A method of providing communication between a customer premises network and a second device network, in which the customer premises network and the second device network share at a customer premises a communication channel, the method comprising:

communicating among devices in the customer premises network using communication signals in a first spectral band on the communication channel;

communicating among the devices in the second device network using communication signals in a second spectral band distinct from the first spectral band on the communication channel; and

converting information in the first spectral band to a baseband representation;

converting baseband information to the second spectral band so as to transfer information from the customer premises network to the second device network.

32. The method of claim 31 further comprising coupling telecommunications circuit connection to the communication channel.

33. The method of claim 31 further comprising:

coupling the communication channel to a subscriber loop coupled to a central telephone office; and

coupling a plain old telephone service (POTS) compatible-device to the communication channel to connect the POTS compatible device to the central telephone office.

34. The method of claim 31 further comprising centralizing the conversion of information in the first spectral band to the second spectral band at a single customer premises gateway server.

35. The method of claim 31 further comprising distributing the conversion of information in the first spectral band to the second spectral band across a plurality of customer premises client devices.

36. The method of claim 31 further comprising converting information in the second spectral band to the first spectral band to transfer information from the second device network to the customer premises network.

37. The method of claim 36 further comprising centralizing the conversion of information in the first spectral band to the second spectral and the conversion of information in the second spectral band to the first spectral band at a single customer premises gateway server.

38. The method of claim 36 further comprising distributing the conversion of information in the first spectral band to the second spectral band across a plurality of customer premises client devices and distributing the conversion of information in the second spectral band to the first spectral band across a plurality of customer premises client devices.

39. The method of claim 36 further comprising centralizing the conversion of information in the first spectral band to the second spectral at a single customer premises gateway server and distributing the conversion of information in the second spectral band to the first spectral band across a plurality of customer premises client devices.

40. A method for interconnecting a plurality of distinct device networks, including a customer premises network located at a customer premises, comprising:

generating first network signals associated with the customer premises network having a first network protocol, said first network signals being in a first spectral band;

generating second network signals associated with a second device network having a second network protocol, said second network signals being in a second spectral band;

coupling the first network signals and the second network signals to a shared communication channel;

detecting network signals coupled to the shared communication channel in the first spectral band that are addressed to a device associated with the second device network; and

converting detected signals to a network signal compatible with the second network protocol and in the second spectral band.