Aperiodic CSI reporting method based on aperiodic CSI-RS in wireless communication system, and device therefor

A user equipment (UE) in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• transmitting, to a base station, information related to a threshold value of channel status information (CSI) computing capability;
• receiving, from the base station, messages for triggering an aperiodic CSI report in a time unit;
• transmitting the aperiodic CSI report to the base station by updating the aperiodic CSI reports,
• wherein, based on a number of aperiodic CSI reports to be triggered in the time unit being greater than the threshold value, a number of aperiodic CSI reports to be updated is equal to or less than the threshold value.