Method for Realizing Single Radio Voice Call Continuity and Single Radio Voice Call Continuity System

A system for supporting single radio voice call continuity, comprising:

• a packet switch (PS) network, a circuit switch (CS) network, and an enhanced mobile switch center (eMSC);
• wherein:
• said PS network is configured to:
• send a handover request to the eMSC to request an IP Multimedia Core Network Subsystem (IMS) session to be handed over to gain access via said CS network;
• said IMS session is a session established by user equipment (UE) with a remote user via the PS network, and the session is anchored to the eMSC;
• and
• said eMSC is configured to:
• receive said handover request, establish a media link, and relate a newly established media link with a remote media link of the IMS session, so as to make the UE communicate with the remote user via said newly established media link and said remote media link.

An enhanced mobile switch center (eMSC) for supporting single radio voice call continuity, comprising:

• a receiving module, which is configured to:
• receive a handover request sent by a packet switch (PS) network to the eMSC to request an IP Multimedia Core Network Subsystem (IMS) session to be handed over to gain access via a circuit switch (CS) network, and send said handover request to a link establishment module;
• wherein, said IMS session is a session established by user equipment (UE) with a remote user via said PS network and anchored to the eMSC;
• and
• the link establishment module, which is configured to:
• establish a media link, and relate a newly established media link with a remote media link of said IMS session, and make the UE communicate with the remote user via said newly established media link and said remote media link.