Patent ID: 11683843

Abstract:
The 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 disclosure provides method and apparatus for determining channel access procedure type for Msg3 transmission. The method includes transmitting, to a terminal, a random access response (RAR) including an uplink grant for a transmission of a message 3 (MSG3) associated with a random access procedure and first information associated with a type for a first channel access procedure for the transmission of the MSG3; transmitting, to the terminal, downlink control information (DCI) scheduling a retransmission of the MSG3 in case that the MSG3 is not received, the DCI including second information associated with a type for a second channel access procedure for the retransmission of the MSG3; and receiving, from the terminal, the MSG3 based on the second channel access procedure, which is based on the type identified by the second information.