SINGLE RADIO VOICE CALL CONTINUITY FOR 5G WIRELESS NETWORKS

摘要

Disclosed are methods, systems and devices for single radio voice call continuity (SRVCC) in 5G networks. One method of maintaining voice call and Internet Protocol (IP) continuity includes transmitting, upon determining that a voice service in a first network has terminated, a request to join a second network, where the request includes an identifier associated with the second network that is mapped from an identifier associated with a third network, and where the mapping indicates that the wireless device is joining the second network from the third network, and performing a communication operation in the second network using IP information that was used to perform the voice service in the first network. In another method, the request includes a mobility registration type.