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

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

• a radio frequency (RF) unit;
• at least one processor;
• and
• at least one computer memory operably 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, from a base station, CSI-reference signal (RS) resource configuration information;
• receiving a first CSI-RS resource based on the CSI-RS resource configuration information;
• and
• reporting, to the base station, a first CSI based on the first CSI-RS resource,
• wherein a single Y-port CSI-RS resource is configured based on the CSI-RS resource configuration information, some ports of the single Y-port CSI-RS resource are configured for channel measurement of the UE, and remaining ports other than the some ports of the single Y-port CSI-RS resource are configured for interference measurement of the UE, and
• wherein based on information related to the some ports being not indicated, a preset number of ports are selected as the some ports in order of stronger transmission power intensity for each port of the single Y-port CSI-RS resource.

At least one computer-readable storage medium storing instructions that, based on being executed by at least one processor, control a user equipment to perform operations for reporting channel state information (CSI) in a wireless communication system, the operations comprising:

• receiving, from a base station, C SI-reference signal (RS) resource configuration information;
• receiving a first CSI-RS resource based on the CSI-RS resource configuration information;
• and
• reporting, to the base station, a first CSI based on the first CSI-RS resource,
• wherein a single Y-port CSI-RS resource is configured based on the CSI-RS resource configuration information, some ports of the single Y-port CSI-RS resource are configured for channel measurement of the UE, and remaining ports other than the some ports of the single Y-port CSI-RS resource are configured for interference measurement of the UE, and
• wherein based on information related to the some ports being not indicated, a preset number of ports are selected as the some ports in order of stronger transmission power intensity for each port of the single Y-port CSI-RS resource.