Question: What happens when a UE fails to reserve QoS resources over non-3GPP access for the QoS flows associated with an IKEv2 Child SA during a PDU Session Modification procedure via trusted non-3GPP access?
Option 1: The TNGF will automatically retry the IKEv2 Child SA Request without the Additional QoS Information.
Option 2: The UE will accept the IKEv2 Child SA Request and proceed with the PDU Session Modification.
Option 3: The network will terminate the PDU Session.
Option 4: The UE shall reject the IKEv2 Child SA Request, and based on operator policy, the network may reattempt to establish the Child SA without the Additional QoS Information.
Explanation: According to the procedure for UE or network requested PDU Session Modification via trusted non-3GPP access, if the UE fails to reserve QoS resources over non-3GPP access for the QoS flows associated with an IKEv2 Child SA, it shall reject the IKEv2 Child SA Request. The network may then reattempt to establish the Child SA without the Additional QoS Information based on operator policy.