Patent ID: 8180347

Claim:
A domain transferring method for single radio voice call continuity, a UE accessing via a long term evolution (LTE)/system architecture evolution (SAE) network, and setting up an IP multimedia subsystem (IMS) session with a remote node, and the session being anchored at a voice call continuity application server (VCC AS); after an shared inter working function (S-IWF) receives a handover request which is sent by the LTE/SAE network and used to transfer the session to make the session access from a circuit switched (CS) domain, the method including: the LTE/SAE network sending a handover command to the UE; after receiving the handover command, the UE sending a handover completed message to a target access equipment in the CS domain; after the UE sends the handover completed message, or after an S-IWF receives a message sent by the UE which indicates that the handover is completed, a release session notification message being sent to the VCC AS; and after receiving the release session notification message, the VCC AS releasing session resources of the session from the VCC AS to the LTE/SAE network.