Call processing architecture

• US 20030091032A1
• Filed: 09/30/2002
• Published: 05/15/2003
• Est. Priority Date: 09/28/2001
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Siemens Communications Incorporated (Siemens AG)
• Inventors: Saba, Salim, Stockdale, Robert S., Cosmidis, Nicholas, Phung, Van, Laxman, Amruth, Bloch, Jack
• Granted Patent: US 7,257,110 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• 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 12/2874 Processing of data for distribution to the subscribers
• CPC Class Codes: H04L 12/5601 Transfer mode dependent, e.g. ATM
• CPC Class Codes: H04L 2012/5618 Bridges, gateways [GW] or interworking units [IWU]
• CPC Class Codes: H04L 2012/5671 Support of voice
• CPC Class Codes: H04L 45/10 Routing in connection-oriented networks, e.g. X.25 or ATM
• CPC Class Codes: H04M 2207/20 hybrid systems
• CPC Class Codes: H04M 7/1225 Details of core network interconnection arrangements

Abstract

A call processing system includes an access gateway that has a local switching unit. The access gateway, in operation, provides access to voice signals and data signals. The call processing system also includes a call feature server that has a host interface platform configured to connect to the access gateway through a network. The call feature server, in operation, provides call control functionality to the local switching unit. The call feature server is configured to provide bearer control signals through a packet network to establish a bearer channel.

Claims

1. A call processing system, comprising:

an access gateway including a local switching unit, the access gateway, in operation, providing access to voice signals and data signals; and

a call feature server having a host interface platform configured to connect to the access gateway through a network, the call feature server, in operation, providing call control functionality to the local switching unit, the call feature server configured to provide bearer control signals through a packet network to establish a bearer channel.

2. The system of claim 1, wherein the access gateway comprises a media gateway to convert time division multiplex (TDM) signals to a packet compatible format, the media gateway providing bearer channel transport to the local switching unit.

3. The system of claim 2, wherein the local switching unit comprises:

a access control platform (ACP); and

a remote timeslot interchange (LTI) interfacing the ACP with bearer signals and control signals.

4. The system of claim 3, wherein the local switching unit further comprises:

a access line frame (ALF) interfacing the ACP with bearer signals and control signals.

5. The system of claim 2, wherein the access gateway includes an integrated access platform providing a GR303 interface, the integrated access platform interfacing the ACP with bearer and control signals.

6. The system of claim 1, wherein the host interface platform comprises:

a first subplatform having a first interface processor card and a first T1 card; and

a second subplatform having a second interface processor card and a second T1 card;

the second subplatform redundant to the first subplatform.

7. The system of claim 1, wherein the network comprises a time division multiplex (TDM) network.

8. The system of claim 1, wherein the network comprises the packet network.

9. The system of claim 8, wherein the packet network comprises an asynchronous transfer mode (ATM) network.

10. The system of claim 9, wherein the access gateway comprises a first ATM edge switch connecting the local switching unit to the network to receive control signals from the call feature server, the first ATM edge switch performing circuit emulation of control signals and routing of bearer channels.

11. The system of claim 10 wherein the call feature server comprises a second ATM edge switch connecting the host interface platform to the network, the second ATM edge switch performing circuit emulation of control signals in tandem with the first ATM edge switch.

12. The system of claim 8, wherein the packet network comprises an Internet Protocol (IP) network.

13. The system of claim 12, wherein the access gateway comprises:

a first multiplexer connecting local switching unit to the network to receive control signals from the call feature server, the first multiplexer performing circuit emulation of control signals and routing of bearer channels.

14. The system of claim 13, wherein the call feature server comprises:

a second multiplexer connecting the host interface platform to the network, the multiplexer performing circuit emulation of control signals in tandem with the first multiplexer.

15. The system of claim 1 wherein components of the access gateway are accessible through a web browser.

16. The system of claim 1, further comprising a plurality of access gateways.

17. The system of claim 16, wherein the media gateway provides bearer channel transport to each of the plurality of access gateways.

18. The system of claim 16, wherein each access gateway has a corresponding media gateway.

19. A method of call processing, comprising:

connecting a network to a call feature server having a host interface platform;

connecting the network to an access gateway having a local switching unit;

receiving a request to route a call from the access gateway;

sending a control signal from the call feature server to the local switching unit to route the call; and

sending a bearer channel control signal to establish a bearer channel.

20. The method of claim 19, wherein sending a bearer control signal comprises sending the bearer control signal from the call feature server.

21. The method of claim 19, wherein sending a bearer control signal comprises sending the bearer control signal from the access gateway.

22. The method of claim 19 wherein the network comprises a packet based network.

23. The method of claim 22 wherein the network comprises an ATM network.

24. The method of claim 22 wherein the network comprises an IP network.

25. The method of claim 22 wherein the access gateway comprises:

a media gateway capable of converting a time division multiplex messages to packet-based messages.

26. A call feature server for a call processing system comprising:

a centralized controller to send control signals to a plurality of distributed processors, a local area network (LAN) to couple the centralized

controller to each of the plurality of distributed processors to perform decentralized call processing; and

a host interface platform connecting the LAN to a network to send control signals and bearer signals, the host interface platform configured to interface with a packet network.

27. The call feature server of claim 26, further comprising:

an access gateway connected to the host interface platform via the network.

28. The call feature server of claim 26, wherein the host interface platform comprises:

a first subplatform having a first interface processor card and a first TI card.

29. The call feature server of claim 28, wherein the host interface platform further comprises:

a second subplatform having a second interface processor card and a second T1 card;

the second subplatform redundant to the first subplatform.

30. The call feature server of claim 26, wherein the network comprises a time division multiplex (TDM) network.

31. The call feature server of claim 26, wherein the network comprises an asynchronous transfer mode (ATM) network.

32. The call feature server of claim 31, wherein the access gateway comprises a first ATM edge switch connecting the local switching unit to the network to receive control signals from the call feature server, the first ATM edge switch performing circuit emulation of control signals and routing of bearer channels.

33. The call feature server of claim 32 wherein the call feature server comprises a second ATM edge switch connecting the host interface platform to the network, the second ATM edge switch performing circuit emulation of control signals in tandem with the first ATM edge switch.

34. The call feature server of claim 26, wherein the network is an Internet Protocol (IP) network.

35. The call feature server of claim 34, wherein the access gateway comprises:

a first multiplexer connecting local switching unit to the network to receive control signals from the call feature server, the first multiplexer performing circuit emulation of control signals and routing of bearer channels.

36. The call feature server of claim 35, wherein the call feature server comprises:

a second multiplexer connecting the host interface platform to the network, the multiplexer performing circuit emulation of control signals in tandem with the first multiplexer.

37. A method of call processing, comprising:

receiving a request to route a call; and

sending control signals via a host interface platform through a network to set-up the call; and

sending bearer control signals.

38. The method of claim 37, wherein the network is a packet based network.

39. The method of claim 38, further comprising:

sending control signals to route the call through one or more media gateways.

40. The method of claim 38, further comprising:

emulating a TDM signal through a network.

41. An access gateway for a call processing system, comprising:

a local switching unit to set-up a call;

a media gateway capable of TDM signal and packet message conversion, the media gateway receiving control signals from a network, the media gateway providing bearer control signals to the local switching unit from a call feature server; and

a multiplexer to perform circuit emulation of TDM signals from the network.

42. The gateway of claim 41, wherein in the network comprises an ATM network.

43. the gateway of claim 42, wherein the network comprises an IP network.

44. A method of call processing, comprising:

receiving a request to route a call;

converting time division multiplex (TDM) signals to a packet compatible format;

sending the request via a packet network to a call feature server; and

receiving control signals via the packet network from the call feature server to route the call.

45. The method of claim 44, further comprising:

providing bearer control signals from a media gateway.

46. A call processing architecture, comprising:

a first platform including a call feature server, the call feature server configured to provide bearer control a packet network; and

a second platform including an access gateway connected to the call feature server via the network, the access gate way including a media gateway providing TDM and packet based conversion;

wherein the first platform and the second platform each are configured to support an IP network, an ATM network and a TDM network.

47. The call processing architecture of claim 46, further comprising:

a plurality of access gateways.

48. The call processing architecture of claim 47, wherein the media gateway provides to each of plurality of access gateways, bear channel transport.

49. The call processing architecture of claim 47, wherein each of the plurality of access gateways has a media gateway interfacing to the network.