Method for reporting channel state information in wireless communication system, and device therefor

A user equipment (UE) to report channel state information (CSI) through physical uplink shared channel (PUSCH) in a wireless communication system, the UE comprising:

• one or more transceivers;
• one or more processors;
• and
• one or more memories storing instructions for operations executed by the one or more processors and coupled to the one or more processors,
• wherein the operations comprise:
• receiving, from a base station, configuration information,
• wherein the configuration information includes (i) a CSI related configuration and (ii) a configuration related to transmission power control of the PUSCH;
• receiving, from the base station, a CSI-reference signal (CSI-RS) based on the CSI related configuration;
• obtaining CSI based on the CSI-RS,
• wherein the CSI includes information related to coefficients,
• wherein each of elements of the information related to the coefficients is classified as a plurality of groups based on a priority value,
• wherein the priority value is determined based on i) a layer index, ii) an index of a spatial domain related to each of the element and iii) an index of a frequency domain related to each of the elements, and
• wherein the priority value increases as an order in which a higher index and a lower index of indexes of a frequency domain related to the elements are sequentially crossed based on a predefined specific index;
• and
• transmitting, to the base station, a CSI report configured by omitting, among the plurality of groups, a portion of the plurality of groups based on a pre-defined priority of the plurality of groups, through the PUSCH,
• wherein a transmission power of the PUSCH is determined based on the configuration information.

A method of receiving channel state information (CSI) through physical uplink shared channel (PUSCH), by a base station, in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), configuration information,
• wherein the configuration information includes (i) a CSI related configuration and (ii) a configuration related to transmission power control of the PUSCH;
• transmitting, to the UE, a CSI-reference signal (CSI-RS) based on the CSI related configuration;
• and
• receiving, from the UE, a CSI report including CSI measured based on the CSI-RS, through the PUSCH,
• wherein the CSI includes information related to coefficients,
• wherein each of elements of the information related to the coefficients is classified as a plurality of groups based on a priority value,
• wherein the priority value is determined based on i) a layer index, ii) an index of a spatial domain related to each of the element and iii) an index of a frequency domain related to each of the elements, and
• wherein the priority value increases as an order in which a higher index and a lower index of indexes of a frequency domain related to the elements are sequentially crossed based on a predefined specific index,
• wherein the CSI report is configured by omitting, among the plurality of groups, a portion of the plurality of groups based on a pre-defined priority of the plurality of groups, and
• wherein a transmission power of the PUSCH is determined based on the configuration information.