Virtual loop carrier system with gateway protocol mediation

• US 7,164,694 B1
• Filed: 02/28/2003
• Issued: 01/16/2007
• Est. Priority Date: 11/17/1998
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Monterio, Anthony, Nodoushani, Paiman
• Primary Examiner(s): Nguyen; Chau
• Assistant Examiner(s): Elallam; Ahmed
• Application Number:
  US10/378,587
• Time in Patent Office: 1,418 Days
• Field of Search: 370/352, 370/353, 370/356, 370/389, 370/395.1, 370/395.6, 370/395.61, 370/395.65, 370/401, 370/410, 370465-466, 370/467, 370/493, 370/496, 370/498, 370/95.1, 370/354
• US Class Current: 370/467
• CPC Class Codes: H04L 12/2834 Switching of information between an external network and a home network access arrangements H04L12/2856
• CPC Class Codes: H04L 12/2836 Protocol conversion between an external network and a home network controlling appliance services of a home automation network from a device located outside the home and the home network H04L12/2818; protocol conversion H04L69/08; adaptation of digital video signals for transport over a specific home network H04N7/24
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2883 ATM DSLAM
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

A loop carrier system includes a home local area network having plural telephone modules and a hub coupled to in-home telephone wiring. The telephone modules and the hub communicate voice signals over the in-home wiring in a dedicated frequency band above baseband POTS. The hub converts between voice signals and voice packets and is connected to a network access device for transferring the voice packets from the home local area network to a telecommunications network which routes the voice packets to a gateway. The gateway converts between the voice packets and a circuit format compatible with a local digital voice switch. The gateway includes an ATM switch and a call processing adjunct coupled to the ATM switch. The call processing adjunct controls the conversion between voice packets and the circuit format at the ATM switch. The call processing adjunct communicates with the home local area network using a first signaling protocol such as Media Gateway Control Protocol, Session Initiation Protocol or H.323, and with the local digital switch using a second signaling protocol such as GR-303 for controlling call processing in the communication system.

Claims

1. In a communication system having a home local area network and

a local digital switch, a gateway for coupling between the home local area network and

the local digital switch, the gateway comprising:

a packet switch having a switch fabric;

means for controlling conversion between voice packets from the home local area network and a circuit format compatible with the local digital switch and communicating with the home local area network using a first signaling protocol and with the local digital switch using a second signaling protocol, wherein the first and second signaling protocols are different; and

means for controlling the packet switch fabric to setup and teardown virtual circuits bearing the voice packets in response to call processing messaging received from the home local area network using the first signaling protocol and from the local digital switch using the second signaling protocol.

2. The gateway of claim 1 wherein the second protocol is according to GR-303.

3. The gateway of claim 1 wherein the voice packets comprise ATM cells.

4. The gateway of claim 3 wherein the ATM cells are formatted according to an ATM Adaptation Layer.

5. The gateway of claim 4 wherein the ATM cells include AAL1-type and AAL5-type cells.

6. The gateway of claim 5 wherein the packet switch includes means for converting between AAL1 cells and PCM samples.

7. The gateway of claim 6 wherein the means for converting includes means for inserting PCM samples into DS0 format for connection to the local digital switch.

8. The gateway of claim 5 wherein the packet switch is configurable to route AAL5 cells to the means for controlling conversion wherein the AAL5 cells are converted to GR-303 call processing messages.

9. A computer program product for call processing, the computer program product comprising a computer usable medium having computer readable code thereon, which, when executed, causes one or more processors to perform the steps of:

controlling conversion between voice packets associated with a home local area network and a circuit format associated with a local digital switch;

communicating with the home local area network using a first signaling protocol;

communicating with the local digital switch using a second signaling protocol, wherein the first and second signaling protocols are different; and

controlling a packet switch fabric to setup and teardown virtual circuits bearing the voice packets in response to call processing messaging received from the home local area network using the first signaling protocol and from the local digital switch using the second signaling protocol.

10. The computer program product of claim 9 wherein the second signaling protocol is according to GR-303.

11. The computer program product of claim 9 wherein controlling conversion between voice packets and a circuit format includes converting between ATM cells and PCM samples.

12. A method of communication in a system having a home local area network that transmits and receives voice packets to and from a local digital switch, the method comprising:

converting between voice packets and a circuit format at a gateway between the home local area network and the local digital switch;

communicating with the home local area network from the gateway using a first signaling protocol;

communicating with the local digital switch from the gateway using a second signaling protocol, wherein the first and second signaling protocols are different; and

controlling a packet switch fabric to setup and teardown virtual circuits bearing the voice packets in response to call processing messaging received from the home local area network using the first signaling protocol and from the local digital switch using the second signaling protocol.

13. The method of claim 12 wherein the second protocol is according to GR-303.

14. The method of claim 13 further including converting AAL5 cells to GR-303 call processing messages at the gateway.

15. The method of claim 12 further including routing voice packets conveying AAL1 cells through an ATM network to the gateway and converting includes converting the AAL1 cells to PCM samples and inserting the PCM samples into DS0s for connection with the local digital switch.