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

• US 7,480,289 B2
• Filed: 10/30/2007
• Issued: 01/20/2009
• 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: Donovan, Steven R., Gallant, John K.
• Primary Examiner(s): ADDY, THJUAN KNOWLIN
• Application Number:
  US11/928,696
• Publication Number:
  US 20080049924A1
• Time in Patent Office: 448 Days
• Field of Search: 370/352, 370/351, 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 call control entity comprising;

a first device to;

receive a first Session Initiation Protocol (SIP) invite request for a first called party,

determine whether the first SIP invite request is associated with an intelligent network service, and

send a second SIP invite request when the first SIP invite request is associated with an intelligent network service, and

a second device to;

receive an H.323 call establishment request for a second called party,

determine whether the H.323 call establishment request is associated with an intelligent network service, and

send a third SIP invite request when the H.323 call establishment request is associated with an intelligent network service; and

a location manager to;

receive the second SIP invite request,

acquire a first address for the first called party,

send the first address to the first device,

receive the third SIP invite request,

acquire a second address for the second called party, and

send the second address to the second device.

2. The system of claim 1, where, when determining whether the first SIP invite request is associated with an intelligent network service, the first device is configured to:

determine whether 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, when determining whether the H.323 call establishment request is associated with an intelligent network service, the second device is configured to:

determine whether the H.323 call establishment 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 first device is further configured to:

establish a first telephone call based on the first address, and

where the second device is configured to;

establish a second telephone call based on the second address.

5. The system of claim 1, where, when acquiring a first address for the 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 the 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 device receives the first SIP invite request from a data network, and

where the second device receives the H.323 call establishment request from the data network.

8. A system comprising:

an H.323 device to;

receive an H.323 call establishment request, the H.323 call establishment request being associated with an intelligent network service,

send a first Session Initiation Protocol (SIP) invite request in response to receiving the H.323 call establishment request that is associated with an intelligent network service; and

a location manager to;

receive the first SIP invite request from the H.323 device,

obtain, in response to receiving the first SIP invite request, an address for a called party at an egress Internet Protocol (IP) telephony device, and

send the obtained address to the H.323 device,

the H.323 device establishing a telephone call using the obtained address.

9. The system of claim 8, where the intelligent network service includes an “

800”

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

10. The system of claim 8, where, when obtaining an address, the location manager is configured to:

obtain the address from a local database.

11. The system of claim 8, where, when obtaining an address, the location manager is configured to:

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

12. The system of claim 8, where the H.323 device receives the H.323 call establishment request from a data network.

13. The system of claim 8, where, when establishing a telephone call, the H.323 device is configured to:

receive a SIP message from the egress IP telephony device,

convert the SIP message to an H.323 message, and

send the H.323 message to an ingress IP telephony device.

14. A method comprising:

receiving, via a first device, an H.323 call establishment request;

determining, via the first device, whether the H.323 call establishment request is associated with an intelligent network service;

sending, via the first device, a first Session Initiation Protocol (SIP) invite request to a second device in response to determining that the H.323 call establishment request is associated with the intelligent network service;

obtaining, via the second device, an address for a called party in response to receiving the first SIP invite request;

sending, via the second device, the obtained address to the first device; and

establishing, via the first device, a telephone call using the obtained address.

15. The method of claim 14, where the determining whether the H.323 call establishment request is associated with an intelligent network service includes:

determining whether the H.323 call establishment request is associated with one or more of an “

800”

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

16. The method of claim 14, where the obtaining an address includes:

obtaining the address from a local database.

17. The method of claim 14, where the obtaining an address includes:

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

18. The method of claim 14, where the receiving an H.323 call establishment request includes:

receiving the H.323 call establishment request from a data network.

19. The method of claim 14, where the establishing a telephone call includes:

receiving, via the first device, a SIP message from a first Internet Protocol (IP) telephony device,

convening, via the first device, the SIP message to an H.323 message, and

sending, via the first device, the H.323 message to a second IP telephony device.

20. The method of claim 14, further comprising:

sending, via the first device, a session detail record to a billing authority.