Patent ID: 9398054
Filing Date: 2016-07-19
CPC Classification: H04L

Claim Text:
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.