Question: What happens to a PDU Session when handover between 3GPP access and untrusted non-3GPP access fails due to policy restrictions or resource setup rejection?
Option 1: The network releases the PDU Session.
Option 2: The network does not release the PDU Session, but instead maintains it on the original access type.
Option 3: The UE is redirected to a different non-3GPP access point.
Option 4: The handover procedure is retried after a predetermined timeout period.
Explanation: When handover of a PDU Session between 3GPP access and untrusted non-3GPP access fails due to policy restrictions or resource setup rejection, the network should not release the PDU Session. Instead, it maintains the session on the original access type to ensure continuity of service for the UE.