METHOD FOR REQUESTING AN UNREGISTERED UE TO PERFORM REGISTRATION IN THE IMS

摘要

ABSTRACT OF THE DISCLOSURE The method for requesting an IMS unregistered UE to perform IMS registration comprising steps of: a) initiating an IMS domain session or sending an IMS relevant signaling to a called subscriber by a UE A; b) informing the UE A information that the called subscriber has not registered with the IMS by the network; c) requesting the called terminal to conduct IMS registration by the UE A; and d) restarting the IMS session after the called terminal completes the IMS registration. With the present invention, an IMS unregistered UE can also perform IMS service.