Method, computer readable medium and apparatus to determine support of IMS voice service in a 5G mobile network

A non-transitory computer readable medium having instructions stored thereon that, when executed by one or more processors of a user equipment (UE), cause the UE to perform operations, the operations comprising:

• generating, by the UE, an initial registration request message that includes fifth generation mobility management (5GMM) capabilities of the UE that are indicative of whether the UE supports voice over internet protocol multimedia subsystem (IMS), wherein the 5GMM capabilities include a first indication of whether the UE supports voice over new radio (VONR);
• transmitting, by the UE, the initial registration request message using Non-Access Stratum (NAS) signaling to a radio access network (RAN) node in a wireless network;
• and
• receiving, by the UE, a registration accept message that includes an indication of whether voice over IMS is approved, wherein the indication is based on a comparison of the 5GMM capabilities of the UE and capabilities of the RAN node.

A user equipment (UE), comprising:

• radio front end circuitry configured to perform wireless communication over a wireless network;
• processor circuitry, coupled to the radio front end circuitry, configured to:
• generate an initial registration request message that includes fifth generation mobility management (5GMM) capabilities of the UE that are indicative of whether the UE supports voice over internet protocol multimedia subsystem (IMS), wherein the 5GMM capabilities include a first indication of whether the UE supports voice over new radio (VoNR);
• transmit, using the radio front end circuitry, the initial registration request message using Non-Access Stratum (NAS) signaling to a radio access network (RAN) node in the wireless network;
• and
• receive, by the UE, a registration accept message that includes an indication of whether voice over IMS is approved, wherein the indication is based on a comparison of the 5GMM capabilities of the UE and capabilities of the RAN node.