Method for transmitting/receiving channel state information in wireless communication system, and device therefor

A user equipment (UE) configured to report channel state information (CSI) in a wireless communication system, the UE comprising:

• a transceiver for transmitting and receiving a wireless signal;
• and
• a processor functionally connected to the transceiver, wherein the processor is configured to:
• control the transceiver to receive CSI related configuration information from a base station, wherein the CSI related configuration information includes a CSI reporting-related configuration that includes information for a report type which is related to a time domain behavior for the reporting of the CSI;
• control the transceiver to receive a reference signal from the base station;
• generate CSI based on the reference signal, wherein the CSI is generated based on a measurement of the reference signal;
• and
• control the transceiver to transmit the CSI to the base station,
• wherein the CSI is transmitted periodically, aperiodically or semi-persistently, based on the report type,
• wherein, based on the report type being related to periodic CSI reporting, the CSI is transmitted on a Physical Uplink Control Channel (PUCCH),
• wherein, based on the report type being related to aperiodic CSI reporting, the CSI is transmitted on a Physical Uplink Shared Channel (PUSCH),
• wherein, based on the report type being related to semi-persistent CSI reporting, the CSI is transmitted on the PUCCH or the PUSCH,
• wherein the CSI includes i) information for CSI Part 1 which includes at least one of a Rank Indicator (RI), a CSI-RS Resource Indicator (CRI) or a Channel Quality Indicator (CQI) and ii) information for CSI part 2 which includes a Precoding Matrix Indicator (PMI),
• wherein, based on some of the information for CSI part 2 being omitted in the CSI, the omission of the information for CSI part 2 is based on a pre-defined priority,
• wherein, based on the base station being based on multiple points that transmit and receiving a signal:
• the reference signal is received from each of the multiple points,
• the CSI is transmitted to at least one of the multiple points, and
• the information for CSI Part 1 includes a WideBand (WB) CQI for the multiple points and a SubBand (SB) CQI for each of the multiple points,
• wherein, based on some of the information for CSI part 1 being omitted in the CSI, the omission of the information for CSI part 1 is based on a priority related to the omission of the CSI part 1, and
• wherein the priority related to the omission of the CSI part 1 is configured such that a priority of the WB CQI for the multiple points is higher than a priority of the SB CQI for each of the multiple points.