EP4096288

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.Embodiments herein disclose a terminal in a wireless communication system. The method performed by the terminal includes receiving, from a base station, first information on a mapping between at least one quality of service, QoS, identifier, ID, QoS ID, and at least one data radio bearer, DRB; identifying a QoS ID associated with a first uplink packet; identifying whether there is a DRB to map the QoS ID associated with the first uplink packet, based on the first information; and transmitting, to the base station, the first uplink packet on a default DRB, based on no DRB being identified, wherein the first uplink packet is marked with the QoS ID.