Methods and apparatuses of UE for measurement of TAI updates in an NTN. A method of a UE comprises: receiving, from a BS, an SIB including multiple TAIs and an indication of whether to include a UE location in an NAS registration/tracking area update operation; determining whether to include the UE location based on the indication; identifying information for the UE location; generating a radio resource control (RRC) message including the information for the UE location, wherein the RRC message encapsulates a NAS message; and transmitting, to the BS, the RRC message including the information for the UE location.