A method and apparatus for operation in NTN is provided. Method for operation in NTN includes receiving SIB1 including the first common offset2 and the first common offset3 and the first reference position in the first NR cell, receiving a first RRC message including a first bitmap and a first DRX configuration in the first NR cell, monitoring PDCCH of the first cell based on the first IE group 1 received in SIB1 and the first IE group 2 received in the first RRC message and the first value determined by the terminal and the first DRX configuration, receiving a second RRC message including a second common offset2 and a second common offset3 and a second reference position and a second DRX configuration and a second bitmap in the first NR cell and monitoring the PDCCH of the second cell based on the second IE group 1 and the second IE group 2 received in the second RRC message and the second value determined by the UE and the second DRX configuration.