Method for transmitting or receiving signal in wireless communication system and device therefor

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

• determining a channel estimation complexity required for a user equipment (UE) to monitor PDCCH candidates in at least one control resource set (CORESET) during one slot;
• when the determined channel estimation complexity exceeds a channel estimation capability of the UE, determining a part of the PDCCH candidates for which the UE skips monitoring and the remaining PDCCH candidates monitored by the UE;
• and
• transmitting a PDCCH signal based on one of the remaining PDCCH candidates,
• wherein the channel estimation complexity is determined based on a resource element group (REG) bundle size configured for each of the at least one CORESET.

A user equipment (UE) for receiving a physical downlink control channel (PDCCH) signal, the UE comprising:

• a transceiver, and
• a processor configured to control the transceiver,
• wherein the processor is configured to determine a channel estimation complexity required for monitoring PDCCH candidates in at least one control resource set (CORESET) during one slot, when the determined channel estimation complexity exceeds a channel estimation capability of the UE, skip a part of the PDCCH candidates and monitor only the remaining PDCCH candidates, and receive a PDCCH signal based on a result of monitoring the remaining PDCCH candidates, and
• wherein the channel estimation complexity is determined based on a resource element group (REG) bundle size configured for each of the at least one CORESET.

A base station (BS) for transmitting a physical downlink control channel (PDCCH) signal, the BS comprising:

• a transceiver, and
• a processor configured to control the transceiver,
• wherein the processor is configured to determine a channel estimation complexity required for a user equipment (UE) to monitor PDCCH candidates in at least one control resource set (CORESET) during one slot, when the determined channel estimation complexity exceeds a channel estimation capability of the UE, determine a part of the PDCCH candidates for which the UE skips monitoring and the remaining PDCCH candidates monitored by the UE, and transmit a PDCCH signal based on one of the remaining PDCCH candidates, and
• wherein the channel estimation complexity is determined based on a resource element group (REG) bundle size configured for each of the at least one CORESET.