Method and apparatus for transmitting and receiving channel state information in wireless communication system

A terminal of transmitting channel state information (CSI) in a wireless communication system, the terminal comprising:

• at least one transceiver for transmitting and receiving a wireless signal;
• and
• at least one processor for controlling the at least one transceiver,
• wherein the at least one processor configured to:
• receive, from a base station, configuration information related to the CSI;
• receive, from the base station, one or more RS (reference signal) resources transmitted by a different downlink spatial domain transmission filter;
• and
• transmit, to the base station, the CSI including a L1-SINR (Layer 1 Signal-to-Interference-plus-Noise Ratio) generated based on the one or more RS resources,
• wherein the configuration information includes information on M (M is a natural number) RS resource groups,
• wherein each of the M RS resource groups includes one or more RS resource pairs configured with an RS resource for channel measurement and an RS resource for interference measurement,
• wherein the CSI includes information on N (N≤M, N is the natural number) RS resource groups selected from the M RS resource groups and a L1-SINR value for the N RS resource groups.

A method of receiving channel state information (CSI) in a wireless communication system, the method performed by a base station comprising:

• transmitting, to a terminal, configuration information related to the CSI;
• transmitting, to the terminal, one or more RS (reference signal) resources by a different downlink spatial domain transmission filter;
• and
• receiving, from the terminal, the CSI,
• wherein the configuration information includes information on M (M is a natural number) RS resource groups,
• wherein each of the M RS resource groups includes one or more RS resource pairs configured with an RS resource for channel measurement and an RS resource for interference measurement,
• wherein the CSI includes information on N (N≤M, N is the natural number) RS resource groups selected from the M RS resource groups and a L1-SINR value for the N RS resource groups.

A base station of transmitting channel state information (CSI) in a wireless communication system, the base station comprising:

• at least one transceiver for transmitting and receiving a wireless signal;
• and
• at least one processor for controlling the at least one transceiver,
• wherein the at least one processor configured to:
• transmit, to a terminal, configuration information related to the CSI;
• transmit, to the terminal, one or more RS (reference signal) resources by a different downlink spatial domain transmission filter;
• and
• receive, from the terminal, the CSI from the terminal,
• wherein the configuration information includes information on M (M is a natural number) RS resource groups,
• wherein each of the M RS resource groups includes one or more RS resource pairs configured with an RS resource for channel measurement and an RS resource for interference measurement,
• wherein the CSI includes information on N (N≤M, N is the natural number) RS resource groups selected from the M RS resource groups and a L1-SINR value for the N RS resource groups.