receiving, from a base station of the NTN, system information including a response delay value to accommodate a propagation delay between the terminal and the base station in the NTN, wherein the base station is a satellite;

transmitting, to the base station, a random access preamble;

entering a power saving mode for a period of time determined based on the response delay value, wherein the terminal is inoperable to monitor a physical downlink control channel (PDCCH) in the power saving mode; and

monitoring the PDCCH for a random access response associated with the random access preamble after the power saving mode is over,

wherein the response delay value is determined based on a load of the base station and a processing capability of the base station.