The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. Provided is a method of a user equipment (UE) in a wireless communication system, including transmitting, to a network entity, a first message comprising a session description protocol (SDP) offer, and receiving, from the network entity, a second message comprising an SDP answer corresponding to the SDP offer, wherein the SDP offer comprises a data channel stream identifier of at least one bootstrap data channel and a first attribute related to data channel multiplexing, and wherein the SDP answer comprises access information of the network entity and the first attribute.