Method and device for supporting voice handover in wireless communication system

A user equipment (UE) connected to a first network, for communicating with a network in a wireless communication system, the UE comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to control to:
• connect a voice call to a second network,
• receive, from a base station (BS) of a second network, a message including control information for controlling radio access of the UE, and
• determine a radio access technology (RAT) to be used and a public land mobile network (PLMN) to be accessed after completion of the voice call, using the control information,
• wherein the first network and the second network communicate using different RATs, and
• wherein the voice call is connected to the second network in a circuit switched (CS) manner.

A method of communicating with a network by a base station (BS) of a second network in a wireless communication system, the method comprising:

• connecting a voice call from a first network to the second network;
• receiving control information for a user equipment (UE) from an entity of the second network;
• and
• transmitting a message including the control information to the UE,
• wherein the first network and the second network communicate using different radio access technologies (RATs), and
• wherein the UE and the second network connect the voice call in a circuit switched (CS) manner.

A base station (BS) of a second network, for communicating with a network in a wireless communication system, the BS comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to control to:
• connect a voice call from a first network to the second network,
• receive control information for a user equipment (UE) from an entity of the second network, and
• transmit a message including the control information to the UE,
• wherein the first network and the second network communicate using different RATs, and
• wherein the UE and the second network connect the voice call in a circuit switched (CS) manner.