Method of transmitting and receiving channel state information in wireless communication system and apparatus therefor

A user equipment (UE) configured to transmit power measurement information related to beam reporting in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory is connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• receiving, through the at least one transceiver, downlink control information (DCI) that triggers reporting of the power measurement information;
• receiving, through the at least one transceiver, a downlink reference signal for reporting of the power measurement information;
• and
• transmitting, to a base station through the at least one transceiver, a report of the power measurement information determined based on the received downlink reference signal,
• wherein based on the reporting of the power measurement information being configured for Layer 1 reference signal received power (L1-RSRP) reporting:
• a minimum required time for reporting of the power measurement information is determined based on (i) a first timing parameter related to a first time duration from a last timing of the downlink reference signal to a transmission timing of the report of the power measurement information and (ii) a second timing parameter related to a second time duration from a timing of a triggering DCI to a timing of the downlink reference signal,
• wherein the minimum required time for reporting of the power measurement information is determined based on the first timing parameter and the second timing parameter such that, for a subcarrier spacing of 60 kHz and 120 kHz:
• for the second timing parameter having a value of 14:
• the minimum required time for reporting of the power measurement information is calculated as a sum of (i) the first timing parameter and (ii) the second timing parameter, and
• for the second timing parameter having a value of 224 and 336:
• the minimum required time for the reporting of the power measurement information is determined regardless of the second timing parameter.