Method by which relay communication UE efficiently supports remote UE in configuration update

A relay UE to perform communication, comprising:

• a transceiver;
• and
• a processor,
• wherein the processor receives, from an Access and Mobility Management Function (AMF), UE Configuration Update Command message including information requesting registration for the relay UE;
• wherein the processor transmits, to a remote UE, an instructing message to suspend PC5 connection;
• wherein the processor receives, from the remote UE, a message indicating that suspension of the PC5 connection is complete;
• wherein the processor transmits, to the AMF, UE Configuration Update Complete message in response to the UE Configuration Update Command message;
• wherein the processor performs a registration procedure with the AMF;
• and
• wherein the processor resumes PC5 connection with the remote UE.

An apparatus for a relay user equipment (UE) to perform communication, the apparatus comprising:

• at least one processor;
• and at least one computer memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving, from an Access and Mobility Management Function (AMF), UE Configuration Update Command message including information requesting registration for the relay UE;
• transmitting, to a remote UE, an instructing message to suspend PC5 connection;
• receiving, from the remote UE, a message indicating that suspension of the PC5 connection is complete;
• transmitting, to the AMF, UE Configuration Update Complete message in response to the UE Configuration Update Command message;
• performing a registration procedure with the AMF;
• and
• resuming PC5 connection with the remote UE.