Method and apparatus for providing access and egress uniform resource identifiers for routing

• US 8,300,795 B2
• Filed: 12/04/2009
• Issued: 10/30/2012
• Est. Priority Date: 12/30/2005
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Androski, Frank J., Fishman, Saul, Ibezim, James, Kittredge, Barbara J., Mansell, James J.
• Primary Examiner(s): Anwah, Olisa
• Application Number:
  US12/631,730
• Publication Number:
  US 20110122865A1
• Time in Patent Office: 1,061 Days
• Field of Search: 370/230, 370/392, 370/352, 370/356, 370/349, 379/220.01, 379/221.14
• US Class Current: 379/221.14
• 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 45/3065 for real time traffic
• CPC Class Codes: H04L 61/30 Managing network names, e.g. use of aliases or nicknames name-to-address mapping H04L61/45
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

A method and apparatus for providing routing of calls in a packet network, e.g., a Voice over Internet Protocol (IP) network, using one or more criteria extracted from signaling information to determine the routing for the calls are disclosed. In one embodiment, the routing criteria extracted from signaling messages comprises at least one of: an access Uniform Resource Identifier, a destination phone number, a destination URI host, a calling party number, a calling party URI host, an incoming IP address, or a requested codec. An access URI and the egress URI are used to enhance routing decisions in a VoIP network. For instance, the egress URI can be used to specify egress route selections from the egress point of a VoIP network. The access URI can be used to influence the routing decisions within the VoIP network as well as the routing decisions with regard to egress routes from the egress point of the VoIP network.

Claims

1. A method for routing a call in a communication network, comprising:

receiving a first call setup message;

identifying an access identification parameter associated with an access point of the first call setup message;

generating a second call set up message by incorporating the access identification parameter into the first call setup message; and

determining a routing decision in accordance with the access identification parameter in the second call set up message.

2. The method of claim 1, wherein the communication network is an internet protocol network.

3. The method of claim 1, wherein the access identification parameter comprises an access uniform resource identifier.

4. The method of claim 1, further comprising:

applying the routing decision for identifying an egress identification identification parameter.

5. The method of claim 4, wherein the applying is performed by a network routing engine.

6. The method of claim 4, wherein the egress identification identification parameter comprises an egress uniform resource identifier.

7. The method of claim 6, wherein the egress uniform resource identifier comprises an egress route from an egress point in an egress border element of the communication network.

8. The method of claim 1, wherein the access identification parameter is inserted in a call setup message header of the second call set up message by an access border element.

9. A non-transitory computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform a method for routing a call in a communication network, comprising:

receiving a first call setup message;

identifying an access identification parameter associated with an access point of the first call setup message;

generating a second call set up message by incorporating the access identification parameter into the first call setup message; and

determining a routing decision in accordance with the access identification parameter in the second call set up message.

10. The non-transitory computer-readable medium of claim 9, wherein the communication network is an internet protocol network.

11. The non-transitory computer-readable medium of claim 9, wherein the access identification parameter comprises an access uniform resource identifier.

12. The non-transitory computer-readable medium of claim 9, further comprising:

applying the routing decision for identifying an egress identification parameter.

13. The non-transitory computer-readable medium of claim 12, wherein the applying is performed by a network routing engine.

14. The non-transitory computer-readable medium of claim 12, wherein the egress identification parameter comprises an egress uniform resource identifier.

15. The non-transitory computer-readable medium of claim 14, wherein the egress uniform resource identifier comprises an egress route from an egress point in an egress border element of the communication network.

16. The non-transitory computer-readable medium of claim 9, wherein the access identification parameter is inserted in a call setup message header of the second call set up message by an access border element.

17. A system for routing a call in a communication network, comprising:

a processor; and

a computer-readable medium in communication with the processor, the computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by the processor, cause the processor to perform a method comprising;

receiving a first call setup message;

identifying an access identification parameter associated with an access point of the first call setup message;

generating a second call set up message by incorporating the access identification parameter into the first call setup message; and

determining a routing decision in accordance with the access identification parameter in the second call set up message.

18. The system of claim 17, wherein the access identification parameter comprises an access uniform resource identifier.

19. The system of claim 17, wherein the method further comprises:

applying the routing decision for identifying an egress identification parameter.

20. The system of claim 17, wherein the access identification parameter is inserted in a call setup message header of the second call set up message by an access border element.