Optimized user re-distribution over S-CSCF entities

摘要

Embodiments of the present invention provide a network entity of an IMS network, in which a registered user is being served by an assigned Serving-Call Session Control Function, S-CSCF. The network entity includes a memory storing data that includes an identity of at least one better-matching S-CSCF in the IMS network having capabilities better suited for serving the registered user than the assigned S-CSCF. The network entity is configured to obtain an indication of the availability of the better-matching S-CSCF, and when the better-matching S-CSCF entity is available to initiate a transfer so that the registered user is served by the better-matching S-CSCF. The network entity may be the assigned S-CSCF, or may be an I-CSCF. Embodiments of the present invention provide a method of transferring a registered user to a better-matching S-CSCF.

主权项

1. A network entity of an IMS network wherein a registered user is being served by an assigned Serving-Call Session Control Function (S-CSCF), the network entity comprising: a memory and configured to store in the memory data that includes an identity of at least one better-matching S-CSCF in the Internet Protocol Multimedia Subsystem (IMS) network having capabilities better suited for serving the registered user than the currently assigned S-CSCF,
wherein the S-CSCF is further configured to store in the memory, user-specific selection criteria used to select the S-CSCF as the assigned S-CSCF serving the registered user, information identifying the S-CSCF's capabilities used for the selection criteria, and information identifying the capabilities of other S-CSCF in the IMS network, the S-CSCF being further configured to evaluate the user-specific selection criteria with reference to the capabilities of the other S-CSCFs so as to determine the identify of said at least one better-matching S-CSCF, wherein the network entity is also configured to obtain an indication of the availability of the better-matching S-CSCF, and when the better-matching S-CSCF entity is available to initiate a transfer so that the registered user is served by the better-matching S-CSCF, wherein the network entity is the currently assigned S-CSCF.