Question: What happens to the allocated PRTI value when the authentication and key agreement procedure for 5G ProSe UE-to-network relay or 5G ProSe UE-to-UE relay completes or is aborted?
Option 1: The UE reuses the allocated PRTI value for a new authentication and key agreement procedure.
Option 2: The UE modifies the allocated PRTI value to associate it with another 5G ProSe remote UE or 5G ProSe end UE.
Option 3: The UE releases the allocated PRTI value.
Option 4: The UE keeps the allocated PRTI value reserved for future use.
Explanation: According to the specification, when the authentication and key agreement procedure completes or is aborted, the UE shall release the PRTI value that was allocated for that specific procedure. This ensures efficient management of available PRTI values and prevents conflicts with other ongoing procedures.