Method and ue for enhancing nas signaling in radio capability signaling optimization

A UE (user equipment) for enhancing NAS (non-access stratum) signaling in a RACS (radio capability signaling optimization) of a wireless network, the UE comprising:

• a memory;
• a processor;
• and
• an NAS signaling controller, operably connected to the memory and the processor, and configured to:
• receive an RC_ID_IE (radio capability identity information element) with an RC_ID (radio capability identity) from a server of the wireless network to optimize a transmission of the UE;
• send a registration request message to the server to establish NAS signaling between the UE and the server;
• establish the NAS signaling between the UE and the server;
• and
• enhance the NAS signaling between the UE and the server by performing at least one of:
• receiving a registration accept message with an RC_ID deletion IE (radio capability identity deletion information element) from the server, and sending a registration complete message to the server using existing NAS signaling and without starting a release timer in response to receiving the RC_ID deletion IE in the registration accept message;
• and
• receiving the registration accept message with the RC_ID deletion IE from the server and not sending the registration complete message to the server in response to receiving the RC_ID deletion IE in the registration accept message.