Network control system for a communication network

• US 7,565,448 B1
• Filed: 02/03/2004
• Issued: 07/21/2009
• Est. Priority Date: 02/03/2004
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Schlesener, Matthew C., Sankaranaraynan, Pallavur A.
• Primary Examiner(s): Eng; David Y
• Application Number:
  US10/770,782
• Time in Patent Office: 1,995 Days
• Field of Search: 709/242, 709/223, 709/230, 709/238
• US Class Current: 709/242
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/033 by updating distance vector protocols
• CPC Class Codes: H04L 45/3065 for real time traffic
• CPC Class Codes: H04L 45/54 Organization of routing tables
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment

Abstract

An embodiment of the invention includes a network control system for a communication network comprising a first interface configured to receive an update message wherein the update message indicates a status change of a first gateway and wherein the first gateway provides an interface between a first network and a second network, and a processing system configured to update a routing table based upon the update message and a distance vector associated with the first gateway wherein the routing table comprises a Telephony Routing over Internet protocol (TRIP) routing table.

Claims

1. A network control system comprising:

a first interface configured to receive an update message, wherein the update message indicates a status change of a first gateway of a plurality of gateways, and wherein the plurality of gateways provide an interface between a synchronous network and an asynchronous network, and receive a call request for a call from the asynchronous network to a destination in the synchronous network; and

a processing system configured to update a routing table based upon the status change indicated in the update message, wherein the routing table indicates a status of each of the plurality of gateways and a distance vector associated with each of the plurality of gateways, and process the updated routing table to select a one of the plurality of gateways through which to route the call based on the status of each of the plurality of gateways and the distance vector associated with each of the plurality of gateways, wherein the routing table comprises a Telephony Routing over Internet Protocol (TRIP) routing table.

2. The network control system of claim 1 wherein the first interface is configured to receive the update message from the first gateway.

3. The network control system of claim 1 wherein the first interface is configured to receive the update message from a location server.

4. The network control system of claim 1 wherein the update message comprises a Session Initiation Protocol (SIP) message.

5. The network control system of claim 1 wherein the first gateway comprises a TRIP-lite enabled gateway.

6. The network control system of claim 1 comprising a TRIP enabled location server application running on a Session Initiation Protocol (SIP) proxy server.

7. The network control system of claim 1 wherein the distance vector comprises a determination of the number of hops between an origination gateway of a route and a destination gateway of the route and wherein the route traverses the first gateway.

8. The network control system of claim 7 wherein the first gateway comprises one of either the origination gateway or the destination gateway.

9. The network control system of claim 7 wherein the first gateway is located along the route between the origination gateway and the destination gateway.

10. A communications network comprising:

a plurality of gateways configured to interface communications between a synchronous network and an asynchronous network;

a first gateway of the plurality of gateways configured to transmit an update message wherein the update message indicates a status change of the first gateway wherein the first gateway provides an interface between the synchronous network and the asynchronous network, and receive a call request for a call from the asynchronous network to a destination in the synchronous network;

a network control system configured to receive the update message and to update a first routing table based upon the status change indicated in the update message, wherein the routing table indicates a status of each of the plurality of gateways and a distance vector associated with each of the plurality of gateways, and process the updated routing table to select a one of the plurality of gateways through which to route the call based on the status of each of the plurality of gateways and the distance vector associated with each of the plurality of gateways wherein the first routing table comprises a Telephony Routing over Internet Protocol (TRIP) routing table.

11. The communications network of claim 10 wherein the network control system is configured to receive the update message from the first gateway.

12. The communications network of claim 10 further comprising a location server configured to receive the update message from the first gateway and transmit the update message to the network control system.

13. The communications network of claim 10 wherein the update message comprises a Session Initiation Protocol (SIP) message.

14. The communications network of claim 10 wherein the first gateway comprises a TRIP-lite enabled gateway.

15. The communications network of claim 10 wherein the network control system comprises a TRIP enabled location server application running on a Session Initiation Protocol (SIP) proxy server.

16. The communications network of claim 10 wherein the distance vector comprises a determination of the number of hops between an origination gateway of a route and a destination gateway of the route and wherein the route traverses the first gateway.

17. The communications network of claim 16 wherein the first gateway comprises one of either the origination gateway or the destination gateway.

18. The communications network of claim 16 wherein the first gateway is located along the route between the origination gateway and the destination gateway.

19. A method of operating a network control system comprising:

in a first interface, receiving an update message wherein the update message indicates a status change of a first gateway of a plurality of gateways, and wherein the plurality of gateways provide an interface between a synchronous network and an asynchronous network, and receive a call request for a call from the asynchronous network to a destination in the synchronous network; and

in a processing system, updating a routing table based upon the status change indicated in the update message, wherein the routing table indicates the status of each of the plurality of gateways and a distance vector associated with each of the plurality of gateways, and processing the updated routing table to select a one of the plurality of gateways through which to route the call based on the status of each of the plurality of gateways and the distance vector associated with each of the plurality of gateways, wherein the routing table comprises a Telephony Routing over Internet Protocol (TRIP) routing table.

20. The method of claim 19 wherein the first interface receives the update message from the first gateway.

21. The method of claim 19 wherein the first interface receives the update message from a location server.

22. The method of claim 19 wherein the update message comprises a Session Initiation Protocol (SIP) message.

23. The method of claim 19 wherein the first gateway comprises a TRIP-lite enabled gateway.

24. The method of claim 19 network control system comprises TRIP enabled location server application running on a Session Initiation Protocol (SIP) proxy server.

25. The method of claim 19 wherein the distance vector comprises a determination of the number of hops between an origination gateway of a route and a destination gateway of the route and wherein the route traverses the first gateway.

26. The method of claim 25 wherein the first gateway comprises one of either the origination gateway or the destination gateway.

27. The method of claim 25 wherein the first gateway is located along the route between the origination gateway and the destination gateway.