Question: What happens when a UE receives a CONFIGURATION UPDATE COMMAND message after sending a DEREGISTRATION REQUEST message with the same access type?
Option 1: The UE proceeds with both procedures.
Option 2: The UE ignores the CONFIGURATION UPDATE COMMAND message and proceeds with the de-registration procedure.
Option 3: The UE re-runs the ongoing procedure that triggered the generic UE configuration update procedure.
Option 4: The UE sends a new DEREGISTRATION REQUEST message.
Explanation: According to the 3GPP specification, if the UE receives a CONFIGURATION UPDATE COMMAND message after sending a DEREGISTRATION REQUEST message with the same access type, it shall ignore the CONFIGURATION UPDATE COMMAND message and proceed with the de-registration procedure. This ensures that the UE prioritizes the de-registration process over the configuration update.