Method for transmitting channel status information for multiple time instances in wireless communication system, and apparatus therefor

A user equipment (UE) comprising:

• at least one processor;
• and
• at least one computer memory storing instructions that, when executed by the at least one processor, cause the UE to perform operations comprising:
• receiving downlink control information (DCI) for reporting channel status information (CSI) from a base station (BS);
• receiving at least one channel measurement resource (CMR) based on the DCI from the BS;
• based on the at least one CMR, calculating at least one precoding matrix index (PMI) related to at least one time instance from a time domain (TD) compressed codebook;
• and
• transmitting the CSI including information on a plurality of non-zero coefficients (NZCs) related to the at least one PMI, based on an uplink grant included in the DCI,
• wherein the plurality of NZCs have a plurality of priority values determined by considering indexes of TD basis vectors, indexes of frequency domain (FD) basis vectors, indexes of spatial domain (SD) basis vectors, and indexes of layers in an order.

A non-transitory computer-readable storage medium comprising program instructions that, when executed by at least one processor, cause a user equipment (UE) to perform operations comprising:

• receiving downlink control information (DCI) for reporting channel status information (CSI) from a base station (BS);
• receiving at least one channel measurement resource (CMR) based on the DCI from the BS;
• based on the at least one CMR, calculating at least one precoding matrix index (PMI) related to at least one time instance from a time domain (TD) compressed codebook;
• and
• transmitting the CSI including information on a plurality of non-zero coefficients (NZCs) related to the at least one PMI, based on an uplink grant included in the DCI,
• wherein the plurality of NZCs have a plurality of priority values determined by considering indexes of TD basis vectors, indexes of frequency domain (FD) basis vectors, indexes of spatial domain (SD) basis vectors, and indexes of layers in an order.