System and method for routing calls

• US 20050147088A1
• Filed: 02/28/2005
• Published: 07/07/2005
• Est. Priority Date: 05/25/2000
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Henning, Scott A., Pearce, Christopher E., Bao, Ho, Williams, James David
• Granted Patent: US 7,974,277 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13141 Hunting for free outlet, circuit or channel
• CPC Class Codes: H04Q 2213/13343 Neural networks
• CPC Class Codes: H04Q 2213/13389 LAN, internet
• CPC Class Codes: H04Q 3/66 Traffic distributors

Abstract

Routing calls includes receiving a call request at a call manager from a first endpoint. The call request includes a uniform resource identifier that associates with a second endpoint. A determination is made whether the call request associates with the call manager that received the call request. To route the call request, the call manager searches a call search space for a match to the call request. The call manager communicates the call request to the routing target.

Claims

1. A method for routing calls, comprising:

receiving a call request at a call manager from a first endpoint, the call request including a uniform resource identifier (URI) associated with a second endpoint;

determining whether the call request associates with the call manager that received the call request;

searching a call search space for a match to the call request;

communicating the call request to the routing target.

2. The method of claim 1, wherein searching a call search space includes searching the call search space for a user specified in the URI if the call request is associated with the call manager that received the call request.

3. The method of claim 1, wherein searching a call search space includes searching the call search space for a location specified in the URI if the call request is not associated with the call manager that received the call request.

4. The method of claim 1, wherein searching a call search space includes selecting one or more patterns that match the URI in the call request.

5. The method of claim 1, wherein searching a call search space includes determining a best match to the URI from the patterns that match the URI in the call request.

6. The method of claim 1, wherein communicating the call request to the routing target includes communicating the call request to the second endpoint having the URI that best matches the URI of the call request.

7. The method of claim 1, further comprising:

generating an error response if the call search space does not have a best match to the URI denoted by the call request.

8. A call manager, comprising:

a call control module operable to receive a call request from a first endpoint, the call request including a uniform resource identifier (URI) associated with a second endpoint;

a digit analysis module operable to;

receive the URI included in the call request from the call control module, the digit analysis module operable to determine whether the call request is associated with the call manager that received the call request, the digit analysis module operable to search a call search space to determine a routing target associated with the call request.

9. The call manager of claim 8, wherein the call control module is operable to:

receive the routing target from the digit analysis module, the call control module operable to communicate the call request to the routing target.

10. The call manager of claim 8, wherein the URI includes a selected one of a domain name or an Internet Protocol (IP) address.

11. The call manager of claim 8, wherein the call control module is operable to communicate the call request to the routing target having the URI that best matches the URI of the call request.

12. The call manager of claim 8, wherein the digit analysis module searches the call search space for a user specified in the URI if the call request is associated with the call manager that received the call request.

13. The call manager of claim 8, wherein the digit analysis module searches the call search space for a location specified in the URI if the call request is not associated with the call manager that received the call request.

14. The call manager of claim 8, wherein the digit analysis module selects one or more patterns that match the URI in the call request.

15. The call manager of claim 8, wherein the digit analysis module determines a best match for the URI from the patterns that match the URI in the call request.

16. The call manager of claim 8, wherein call control module is operable to generate an error response if the call request is not in the partition table.

17. A computer readable medium including logic for routing calls, the logic operable to:

receive a call request at a call manager from a first endpoint, the call request including a uniform resource identifier (URI) associated with a second endpoint;

determine whether the call request associates with the call manager that received the call request;

search a call search space for a best match to the call request;

communicate the call request to the routing target.

18. The computer readable medium of claim 17, wherein searching a call search space includes searching the call search space for a user specified in the URI if the call request is associated with the call manager that received the call request.

19. The computer readable medium of claim 17, wherein searching a call search space includes searching the call search space for a location specified in the URI if the call request is not associated with the call manager that received the call request.

20. The computer readable medium of claim 17, wherein searching a call search space includes selecting one or more patterns that match the URI in the call request.

21. The computer readable medium of claim 17, wherein searching a call search space includes determining a best match to the URI from the patterns that match the URI in the call request.

22. The computer readable medium of claim 17, wherein communicating the call request to the routing target includes communicating the call request to the second endpoint having the URI that best matches the URI of the call request.

23. The computer readable medium of claim 17, wherein the logic is operable to:

generate an error response if the call request is not in the partition table.

24. A call manager, comprising:

means for receiving a call request at a call manager from a first endpoint, the call request including a uniform resource identifier (URI) associated with a second endpoint;

means for determining whether the call request associates with the call manager that received the call request;

means for searching a call search space for a best match to the call request;

means for communicating the call request to the routing target.

25. The call manager of claim 24, further comprising:

means for selecting one or more patterns that match the URI in the call request.

26. The call manager of claim 24, further comprising:

means for determining a best match to the URI from the patterns that match the URI in the call request.

27. The call manager of claim 24, further comprising:

means for generating an error response if the call search space does not have a best match to the URI denoted by the call request.

28. A system for routing calls, comprising:

a plurality of subscribers operable to communicate with each other;

a call manager operable to control the communication between the plurality of subscribers, wherein the call manager includes a call control module operable to receive a call request from a first endpoint, the call request including a uniform resource identifier (URI) associated with a second endpoint;

a digit analysis module operable to receive the URI included in the call request from the call control module, the digit analysis module operable to determine whether the call request is associated with the call manager that received the call request, the digit analysis module operable to search a call search space.

29. The system of claim 28, wherein the digit analysis module is operable to:

search a call search space for a user specified in the URI if the call request is associated with the call manager that received the call request, the digit analysis module operable to search the call search space for a location specified in the URI if the call request is not associated with the call manager that received the call request.

30. The system of claim 28, wherein the digit analysis module is operable to:

select one or more patterns that match the URI in the call request, the digit analysis module operable to determine a best match to the URI from the patterns that match the URI in the call request.