Patent ID: 9635173
Date: 2017-04-25
CPC Classifications: H04L,H04M

Claim:
1. Cellular radio communication system comprising an IP Multimedia subsystem and a Multimedia Telephony application server communicatively coupled to the IP Multimedia subsystem, wherein: the IP Multimedia subsystem is adapted for receiving a REGISTER message from a radio terminal, said REGISTER message comprising an option tag indicating a network based service supported by the radio terminal and said option tag requesting information whether said network based service is supported by the cellular communication system; the IP Multimedia subsystem is adapted to acknowledge said REGISTER message by transmitting a positive response message to the radio terminal, the IP Multimedia subsystem is adapted to transmit a third party REGISTER message to the Multimedia Telephony application server, said third party register message comprising the full REGISTER request and comprising the positive acknowledge message; the Multimedia Telephony application server is adapted to transmit a positive response message to the IP Multimedia subsystem indicating receipt of the third party REGISTER message; the Multimedia Telephony application server is adapted to transmit a message request to the IP Multimedia subsystem, said message request indicating support of the network based service by the Multimedia Telephony application server; the IP Multimedia subsystem is adapted to forward the message request to the radio terminal; the radio terminal is adapted to update a local variable corresponding to the indicated support of the network based service upon receipt of the message request and to transmit a positive acknowledge message to the IP Multimedia subsystem; the IP Multimedia subsystem is adapted to forward the positive acknowledge message to the Multimedia telephony application server; and the Multimedia Telephony application server is further adapted to update a user profile associated with the radio terminal corresponding to the positive acknowledge message of the radio terminal forwarded by the IP Multimedia subsystem.