The disclosure relates to a 5th generation (5G) or pre-5G communication system to support a higher data rate after a 4th generation (4G) communication system such as long term evolution (LTE). Various embodiments provide a method for operating a terminal in a wireless communication system, the method including: transmitting a PDU session establishment request message to a network node; receiving a PDU session establishment accept message from the network node; and determining a PDU session as an always-on PDU session for an URLLC service.