METHOD AND APPARATUS FOR COMPLETING A CIRCUIT SWITCHED SERVICE CALL IN AN INTERNET PROTOCOL NETWORK

• US 20130163586A1
• Filed: 01/31/2013
• Published: 06/27/2013
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Ku, Bernard
• Granted Patent: US 8,667,150 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 61/4557 Directories for hybrid networks, e.g. including telephone numbers
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment

Abstract

A method and an apparatus for processing a session request in an Internet Protocol network are disclosed. For example, the method receives a session request, and queries an tElephone NUmbering Mapping (ENUM) server for a called party of the session request. The method determines if at least one Naming Authority Pointer (NAPTR) resource record associated with the called party is received from the ENUM server, and forwards the session request to a circuit switched network if the at least one NAPTR resource record is not received from the ENUM server. The method determines a Session Description Protocol (SDP) value of the session request if the at least one NAPTR resource record is received from the ENUM server, and processes the session request in accordance with the SDP value if the at least one NAPTR resource record is received from the ENUM server.

Claims

1. A method for processing a session request in a packet network, corn p rising:

receiving, by a processor, the session request;

querying, by the processor, a telephone numbering mapping server for a called party of the session request;

determining, by the processor, if a naming authority pointer resource record associated with the called party is received from the telephone numbering mapping server;

forwarding, by the processor, the session request to a circuit switched network if the naming authority pointer resource record is not received from the telephone numbering mapping server;

determining, by the processor, a session description protocol value of the session request if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the session description protocol value defines a type of service; and

processing, by the processor, the session request in accordance with the session description protocol value if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the processing the session request comprises forwarding the session request towards the called party over the packet network if the session description protocol value of the session request is for a service provided over the packet network.

2. The method of claim 1, wherein the session request is an invite message in accordance with a session initiation protocol.

3. The method of claim 1, wherein the service provided over the packet network comprises a video share service.

4. The method of claim 1, wherein the forwarding the session request towards the called party over the packet network is performed using a session initiation protocol universal resource identifier.

5. The method of claim 1, wherein the circuit switched network comprises a public switched telephone network.

6. The method of claim 1, wherein the forwarding the session request to the circuit switched network is performed using a telephone universal resource identifier.

7. The method of claim 1, wherein the packet network comprises an internet protocol network.

8. A tangible computer-readable medium having storing a plurality of instructions which, when executed by a processor, cause the processor to perform operations for processing a session request in a packet network, the operations comprising:

receiving the session request;

querying a telephone numbering mapping server for a called party of the session request;

determining if a naming authority pointer resource record associated with the called party is received from the telephone numbering mapping server;

forwarding the session request to a circuit switched network if the naming authority pointer resource record is not received from the telephone numbering mapping server;

determining a session description protocol value of the session request if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the session description protocol value defines a type of service; and

processing the session request in accordance with the session description protocol value if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the processing the session request comprises forwarding the session request towards the called party over the packet network if the session description protocol value of the session request is for a service provided over the packet network.

9. The tangible computer-readable medium of claim 8, wherein the session request is an invite message in accordance with a session initiation protocol.

10. The tangible computer-readable medium of claim 8, wherein the service provided over the internet protocol network comprises a video share service.

11. The tangible computer-readable medium of claim 8, wherein the forwarding the session request towards the called party over the internet protocol network is performed using a session initiation protocol universal resource identifier.

12. The tangible computer-readable medium of claim 8, wherein the circuit switched network comprises a public switched telephone network.

13. The tangible computer-readable medium of claim 8, wherein the forwarding the session request to the circuit switched network is performed using a telephone universal resource identifier.

14. The tangible computer-readable medium of claim 8, wherein the packet network comprises an internet protocol network.

15. An apparatus for processing a session request in an internet protocol network, comprising:

a processor; and

a computer-readable medium storing a plurality of instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising;

receiving the session request;

querying a telephone numbering mapping server for a called party of the session request;

determining if a naming authority pointer resource record associated with the called party is received from the telephone numbering mapping server;

forwarding the session request to a circuit switched network if the naming authority pointer resource record is not received from the telephone numbering mapping server;

determining a session description protocol value of the session request if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the session description protocol value defines a type of service; and

processing the session request in accordance with the session description protocol value if the naming authority pointer resource record is received from the telephone numbering mapping server, wherein the processing the session request comprises forwarding the session request towards the called party over the internet protocol network if the session description protocol value of the session request is for a service provided over the Internet protocol network.

16. The apparatus of claim 15, wherein the session request is an invite message in accordance with a session initiation protocol.

17. The apparatus of claim 15, wherein the service provided over the internet protocol network comprises a video share service.

18. The apparatus of claim 15, wherein the forwarding the session request towards the called party over the internet protocol network is performed using a session initiation protocol universal resource identifier.

19. The apparatus of claim 15, wherein the circuit switched network comprises a public switched telephone network.

20. The apparatus of claim 15, wherein the forwarding the session request to the circuit switched network is performed using a telephone universal resource identifier.