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. The method includes identifying whether a medium access control (MAC) entity of the terminal is configured with a logical channel (LCH)-based prioritization, identifying whether a first uplink grant is associated with a random access, determining the first uplink grant to be a prioritized uplink grant, and transmitting an uplink signal based on the prioritized uplink grant.