Method for transmitting/receiving pdcch in wireless communication system, and device therefor

A user equipment (UE) configured to receive a physical downlink control channel (PDCCH) in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor,
• wherein the at least one memory is configured to store instructions performing operations based on being executed by the at least one processor,
• wherein the operations comprise:
• receiving, from a base station (BS), configuration information for a control resource set (CORESET), the configuration information including information related to a transmission configuration indication (TCI) state for the CORESET;
• receiving one or more reference signals (RSs) from the BS;
• measuring the one or more RSs;
• transmitting, to the BS, beam information including information for an RS related to a best beam among the one or more RSs;
• changing a reference RS of the TCI state to the RS related to the best beam;
• and
• receiving, from the BS, the PDCCH based on the best beam in the CORESET.

A method of transmitting, by a base station (BS), a physical downlink control channel (PDCCH) in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), configuration information for a control resource set (CORESET), the configuration information including information related to a transmission configuration indication (TCI) state for the CORESET;
• transmitting one or more reference signals (RSs) to the UE, the one or more RSs being measured;
• receiving, from the UE, beam information including information for an RS related to a best beam among the one or more RSs, a reference RS of the TCI state being changed to the RS related to the best beam;
• and
• transmitting, to the UE, the PDCCH based on the best beam in the CORESET.