METHOD AND APPARATUS FOR SUPPORTING SERVICE CONTINUITY BY CONSIDERING NETWORK SLICE AREA IN A WIRELESS COMMUNICATION SYSTEM

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a base station in a wireless communication system. A protocol data unit (PDU) session associated with a network slice is identified, based on first information on availability of the network slice. Deactivation of a user plane (UP) resource for the PDU session is performed, in case that a user equipment (UE) moves from a first cell inside a network slice area of service (NS-AoS) to a second cell outside of the NS-AoS, and the UP resource is active for the PDU session. Second information for requesting the deactivation of the UP resource is transmitted to an access and mobility management function (AMF) entity.