Method of and system for providing intelligent network control services in IP telephony

• US 8,085,760 B2
• Filed: 10/30/2007
• Issued: 12/27/2011
• Est. Priority Date: 09/24/1999
• Status: Expired due to Fees

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Verizon Business Global LLC (Verizon Communications Inc.)
• Inventors: Gallant, John K., Donovan, Steven R.
• Primary Examiner(s): ADDY, THJUAN KNOWLIN
• Application Number:
  US11/928,778
• Publication Number:
  US 20080049732A1
• Time in Patent Office: 1,519 Days
• Field of Search: 370/352, 370/401, 370/351, 370/522, 379/201.01, 379/221.08, 379/221.11, 379/221.13
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1046 Call controllers; Call servers
• CPC Class Codes: H04L 65/1096 Supplementary features, e.g. call forwarding or call holding systems providing special services or facilities to telephony subscribers H04M3/42
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 2207/12 intelligent networks
• CPC Class Codes: H04M 2207/20 hybrid systems
• CPC Class Codes: H04M 2242/14 with services dependent on location where the service is an information service H04M2242/15; services independent of location H04M3/42229
• CPC Class Codes: H04M 3/4228 in networks
• CPC Class Codes: H04M 3/42314 in private branch exchanges
• CPC Class Codes: H04M 7/009 in systems involving PBX or KTS networks
• CPC Class Codes: H04M 7/126 Interworking of session control protocols
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables
• CPC Class Codes: H04Q 3/0025 Provisions for signalling
• CPC Class Codes: H04Q 3/0045 involving hybrid, i.e. a mixture of public and private, or multi-vendor systems

Abstract

A method and system for providing intelligent network control services in IP telephony, wherein the system includes a location manager and an IP telephony proxy server. The location manager includes an interface to a legacy telephony service control entity and the IP telephony proxy server includes an IP interface to the location manager. If the IP telephony proxy server requires intelligent network services, then the IP telephony proxy server sends an IP telephony session initiation request to the called party at the location manager. The location manager uses the information to query the legacy telephony service control entity for routing information. When the location manager receives a routing response from the service control entity, the location manager maps the response to an IP telephony session control message back to the IP telephony proxy server.

Claims

1. A system comprising:

a location manager to;

receive a first Session Initiation Protocol (SIP) invite request from a SIP proxy device,

acquire a first address for a first called party in response to receiving the first SIP invite request,

send the first address to the SIP proxy device,

receive a second SIP invite request from an H.323 device,

acquire a second address for a second called party in response to receiving the second SIP invite request, and

send the second address to the H.323 device.

2. The system of claim 1, where the first SIP invite request is associated with an “

800”

call, a virtual private network (VNET) call, a local number portability request, or a call forwarding request.

3. The system of claim 1, where the second SIP invite request is associated with an “

800”

call, a virtual private network (VNET) call, a local number portability request, or a call forwarding request.

4. The system of claim 1, where the location manager functions as a SIP redirect server.

5. The system of claim 1, where, when acquiring a first address for a first called party, the location manager is configured to:

acquire the first address from a local database.

6. The system of claim 1, where, when acquiring a first address for a first called party, the location manager is configured to:

acquire the first address from a legacy Public Switched Telephone Network system service control entity.

7. The system of claim 1, where the first address includes an address of the first called party at a first egress Internet Protocol (IP) gateway, and

where the second address includes an address of the second called party at a second egress IP gateway.

8. A method comprising:

receiving a first Session Initiation Protocol (SIP) invite request from a SIP proxy device;

obtaining a first address for a first called party in response to receiving the first SIP invite request;

sending the first address to the SIP proxy device in a first SIP response message;

receiving a second SIP invite request from an H.323 device;

obtaining a second address for a second called party in response to receiving the second SIP invite request; and

sending the second address to the H.323 device in a second SIP response message.

9. The method of claim 8, where at least one of the first SIP invite request or the second SIP invite request relates to an “

800”

call.

10. The method of claim 8, where at least one of the first SIP invite request or the second SIP invite request relates to a virtual private network (VNET) call.

11. The method of claim 8, where at least one of the first SIP invite request or the second SIP invite request relates to a local number portability request.

12. The method of claim 8, where at least one of the first SIP invite request or the second SIP invite request relates to a call forwarding request.

13. The method of claim 8, where at least one of the obtaining a first address or the obtaining a second address includes:

sending a routing request to a legacy Public Switched Telephone Network system service control entity.

14. The method of claim 8, where at least one of the obtaining a first address or the obtaining a second address includes:

accessing a local database.

15. The method of claim 8, where at least one of the first SIP response message or the second SIP response message includes a SIP 302 “

temporarily moved”

response message.

16. A method comprising:

obtaining, in response to receiving a first Session Initiation Protocol (SIP) invite request from a SIP proxy device, a first address for a first called party at a first egress Internet Protocol (IP) gateway;

sending the first address to the SIP proxy device in a first SIP response message;

obtaining, in response to receiving a second SIP invite request from an H.323 device, a second address for a second called party at a second egress IP gateway; and

sending the second address to the H.323 device in a second SIP response message.

17. The method of claim 16, where at least one of the first SIP invite request or the second SIP invite request relates to an “

800”

call or a virtual private network (VNET) call.

18. The method of claim 16, where at least one of the first SIP invite request or the second SIP invite request relates to a local number portability request or a call forwarding request.

19. The method of claim 16, where at least one of the obtaining a first address or the obtaining a second address includes:

sending a routing request to a legacy Public Switched Telephone Network system service control entity.

20. The method of claim 16, where at least one of the obtaining a first address or the obtaining a second address includes:

accessing a local database.