Optimally interworking SIP and QSIG call diversion and transfer

• US 20060233176A1
• Filed: 04/19/2005
• Published: 10/19/2006
• Est. Priority Date: 04/19/2005
• Status: Active Grant

• Current Assignee: Unify Patente GmbH & Co. KG (Atos SE)
• Original Assignee: Siemens Communications Incorporated (Siemens AG)
• Inventors: Stumer, Peggy Marie
• Granted Patent: US 7,460,548 B2
• Time in Patent Office: Days
• US Class Current: 370/395.200
• CPC Class Codes: H04M 3/54 Arrangements for diverting calls for one subscriber to another predetermined subscriber based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; to voice mail H04M3/53308
• CPC Class Codes: H04M 3/58 Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party substation line holding circuits H04M1/80
• CPC Class Codes: H04M 7/127 where the session control protocols comprise SIP and SS7

Abstract

Under the present invention, resources such as gateways which interconnect usually disparate networks are released for processes which, while originally being inter-network, become intra-network, and the resource (e.g., gateway) is no longer needed for the intra-network process to be completed. The present invention is useful to optimally interwork an IP network with a PISN employing the QSIG Call Diversion and Single Step Call Transfer supplementary services. Attendant features achieved with implementation of the present invention, include quick release of network circuits that are being used for media connections that are no longer necessary and of system resources that are being used for signaling connections that are no longer necessary. Under the present invention, a media channel is not established from an IP network to a PISN, if a user of the PISN makes a call to a user of the IP network, who has forwarded/diverted her calls into the PISN and vice versa.

Claims

1. A method of call completion in a communications network which comprises a first network and a second network interconnected to each other through an interconnection resource, the method comprising:

initiating a call from a call originator in said first network to a destination in said second network;

allocating said interconnection resource;

routing the call from said first network through said interconnection resource to said second network;

rerouting said call to a call destination within said first network; and

releasing said interconnection resource prior to completion of said call to said call destination in said first network.

2. The method of claim 1, wherein said first network is an IPN.

3. The method of claim 1, wherein said second network is a QSIG/PISN.

4. The method of claim 1, wherein said interconnection resource is a circuit of a gateway.

5. The method of claim 1, wherein said call destination in said first network is the same as said call originator in said first network.

6. The method of claim 1, wherein said call destination in said first network is different that said call originator in said first network.

7. The method of claim 1, wherein:

said first network is an IPN;

said second network is a QSIG/PISN;

said interconnection resource is a circuit of a gateway; and

said call destination in said first network is the same as said call originator in said first network.

8. The method of claim 1, wherein:

said first network is an IPN;

said second network is a QSIG/PISN;

said interconnection resource is a circuit of a gateway; and

said call destination in said first network is different that said call originator in said first network.

9. The method of claim 7 wherein said call rerouting result from Single Step Call Transfer.

10. The method of claim 7 wherein said call rerouting results from call diversion.

11. The method of claim 8 wherein said call rerouting results from Single Step Call Transfer.

12. The method of claim 8 wherein said call rerouting results from call diversion.

13. A communications network comprising:

a first network including a call originator;

an interconnection resource;

a second network including a call destination, said second network interconnected to said first network through said interconnection resource;

wherein a call is initiated from said call originator in said first network to a call destination in said second network and said interconnection resource is allocated to route the call from said first network through said interconnection portal to said second network and said call is rerouted to a call destination within said first network and said interconnection resource is released prior to completion of said call to said destination in said first network.

14. The network of claim 13, wherein said first network is an IPN.

15. The network of claim 13, wherein said second network is a QSIG/PISN.

16. The network of claim 13, wherein said interconnection resource is a circuit of a gateway.

17. The network of claim 13, wherein said call destination in said first network is the same as said call originator in said first network.

18. The network of claim 13, wherein said call destination in said first network is different that said call originator in said first network.

19. The network of claim 13, wherein:

said first network is an IPN;

said second network is a QSIG/PISN;

said interconnection resource is a circuit of a gateway; and

said call destination in said first network is the same as said call originator in said first network.

20. The network of claim 13, wherein:

said first network is an IPN;

said second network is a QSIG/PISN;

said interconnection resource is a circuit of a gateway; and

said call destination in said first network is different that said call originator in said first network.

21. The network of claim 19 wherein said call rerouting results from Single Step Call Transfer.

22. The network of claim 19 wherein said call rerouting results from call diversion.

23. The network of claim 20 wherein said call rerouting results from Single Step Call Transfer.

24. The network of claim 20 wherein said call rerouting results from call diversion.

25. The communications network of claim 13, further comprising:

a soft switch that performs call routing for said call destination in said second network;

wherein said soft switch determines that said call is being rerouted to the same network from where it was initiated; and

wherein said soft switch controls said interconnection resource such that said interconnection resource is released prior to completion of said call to said destination in said first network.

26. A method of call routing in a communications network which comprises a first network and a second network interconnected to each other through an interconnection resource, the method comprising:

capturing said interconnection resource to route a call originating in said first network through said interconnection resource to said second network;

rerouting said call to a call destination within said first network; and

releasing said interconnection portal prior to completion of said call to said call destination in said first network.

27. A communications network implementing the method of claim 26.

28. The communications network of claim 27, wherein the network comprises a soft switch that performs call routing for said call destination in said second network;

wherein said soft switch determines that said call is being rerouted to the same network from where it was initiated; and

wherein said soft switch controls said interconnection resource such that said interconnection resource is released prior to completion of said call to said destination in said first network.

29. The communications network of claim 28 wherein the inter-network resource is a circuit of a gateway.

30. A method of resource allocation in a communications structure which comprises at least a first network and a second network interconnected to each other through an inter-network resource, the method comprising:

allocating said inter-network resource to perform an inter-network process; and

releasing said inter-network resource after said inter-network process becomes an intra-network process and prior to completion of said intra-network process.

31. The method of claim 30 wherein the inter-network resource is a circuit of a gateway.

32. A communications network implementing the method of claim 30.

33. The communications network of claim 32, wherein the network comprises a soft switch that controls said inter-network resource such that said inter-network resource is released prior to completion of said intra-network process.

34. The communications network of claim 33 wherein the inter-network resource is a circuit of a gateway.