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

A terminal configured to transmit 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 CSI resource setting, wherein the configuration information includes information on a CSI-reference signal (CSI-RS) resource set;
• receive a CSI-RS from the base station;
• and
• transmit, to the base station, the CSI derived using the CSI-RS,
• wherein the CSI-RS resource set is configured with two CSI-RS resource groups and N (N is a natural number) resource pairs,
• wherein each of the N resource pairs includes one resource of each of the two resource groups,
• wherein the CSI includes one CSI-RS resource indicator (CRI) corresponding to one resource pair of the N resource pairs and two CSI parameters other than the one CRI associated to each of the two resource groups, respectively, of the one resource pair,
• wherein the two CSI parameters for the one resource pair are derived based on the one CRI for the one resource pair, and
• wherein, for deriving the two CSI parameters for the one resource pair, a resource associated to one resource group of the two resource groups is used for channel measurement and a resource associated to the other resource group of the two resource groups is used for deriving interference.

A base station of receiving 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 CSI resource setting, wherein the configuration information includes information on a CSI-reference signal (CSI-RS) resource set;
• transmit a CSI-RS to the terminal;
• and
• receive, from the terminal, the CSI derived using the CSI-RS,
• wherein the CSI-RS resource set is configured with two CSI-RS resource groups and N (N is a natural number) resource pairs,
• wherein each of the N resource pairs includes one resource of each of the two resource groups,
• wherein the CSI includes one CSI-RS resource indicator (CRI) corresponding to one resource pair of the N resource pairs and two CSI parameters other than the one CRI associated to each of the two resource groups, respectively, of the one resource pair,
• wherein the two CSI parameters for the one resource pair are derived based on the one CRI for the one resource pair, and
• wherein, for deriving the two CSI parameters for the one resource pair, a resource associated to one resource group of the two resource groups is used for channel measurement and a resource associated to the other resource group of the two resource groups is used for deriving interference.