Patent ID: 8265090

Claim:
An IMS network adapted to store access network information for a user in a subscriber profile for the user, the IMS network comprising: a proxy-call session control function (P-CSCF) adapted to receive a first register request message from a communication device of the user, to identify access network information for an access network providing service to the communication device of the user, to generate a second register request message and include the access network information in the second register request message, and to transmit the second register request message for receipt by a serving-call session control function (S-CSCF); the S-CSCF adapted to receive the second register request message, to identify the access network information in the second register request message, to generate a third register request message and include the access network information in the third register request message, and to transmit the third register request message for receipt by a home subscriber server (HSS); and the HSS adapted to receive the third register request message, to identify the access network information in the third register request message, and to store the access network information in the subscriber profile for the user.