According to at least one of the embodiments disclosed herein, a user equipment (UE) may transmit a configured grant (CG) based physical uplink shared channel (PUSCH). However, based on that the CG-based PUSCH is transmitted in a radio resource control (RRC) Inactive state, that an RRC Release message includes at least one of information on a CG-related common search space (CSS) and information on a CG-related user-specific search space (USS), and that the PDCCH is not detected in the CG-related CSS and the CG-related USS until a specific timer expires after the CG-based PUSCH transmission, the UE may determine that the CG-based PUSCH transmission in the RRC Inactive state fails.