Method for transmitting/receiving ims voice support-related signal by ng-ran in wireless communication system, and apparatus therefor

A next generation radio access network (NG-RAN) device for transmitting and receiving a signal for support of Internet protocol (IP) multimedia subsystem (IMS) voice in a wireless communication system, the NG-RAN device comprising:

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• control the transceiver to receive a request for capability of a user equipment (UE) related to the IMS voice from an access and mobility management function (AMF);
• check whether the capability of the UE is compatible with a network configuration;
• and
• control the transceiver to transmit a response including a result of the checking to the AMF, and
• wherein the network configuration includes a network configuration of the NG-RAN and a network configuration of a network node capable of the IMS voice even though the NG-RAN does not support the IMS voice.

An access and mobility management function (AMF) device for transmitting and receiving a signal for support of Internet protocol (IP) multimedia subsystem (IMS) voice in a wireless communication system, the AMF device comprising:

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• control the transceiver to transmit a request for capability of a user equipment (UE) related to the IMS voice to a next generation radio access network (NG-RAN);
• and
• control the transceiver to receive, from the NG-RAN, a response including a result of checking whether the capability of the UE is compatible with a network configuration, and
• wherein the network configuration includes a network configuration of the NG-RAN and a network configuration of a network node capable of the IMS voice even though the NG-RAN does not support the IMS voice.