Systems and methods to improve registration of a user equipment with satellite wireless access

With satellite wireless access, a network node (e.g. AMF) may receive a NAS request from a UE, forwarded by a RAN node (e.g. gNB), where the NAS request includes a tracking area (TA) identity (TAI) indicating a TA in which the UE is located. The network node may then determine that the TAI is not part of a registration area for the UE, although the NAS request is not a NAS Registration. The network node may then instigate an immediate Registration of the UE, e.g., by rejecting the NAS request and sending an indication to the UE to Register, or a deferred Registration, e.g., by performing a NAS procedure for the NAS request and sending an indication to the UE to Register. The AMF may alternatively perform an implicit Registration of the UE, where the AMF performs Registration without receiving a Registration Request from the UE.