Question: What action does the UE take when the S-NSSAI time validity information indicates that the S-NSSAI is not available and the UE is in 5GMM-IDLE mode?
Option 1: The UE initiates a UE-requested PDU session establishment procedure to establish a new PDU session associated with the S-NSSAI.
Option 2: The UE sends a request to the AMF to release any PDU session associated with the S-NSSAI.
Option 3: The UE locally releases any PDU session associated with the S-NSSAI.
Option 4: The UE ignores the S-NSSAI time validity information and continues to use the existing PDU session associated with the S-NSSAI.
Explanation: According to the 3GPP specification, when the S-NSSAI time validity information indicates that the S-NSSAI is not available and the UE is in 5GMM-IDLE mode, the UE shall locally release any PDU session associated with the S-NSSAI. This ensures that the UE does not attempt to use a network slice that is temporarily unavailable.