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

A user equipment for reporting channel status information (CSI) in a wireless communication system, the user equipment comprising:

• a receiver;
• a transmitter;
• and
• a processor,
• wherein the processor is configured to receive from a base station a first channel status information-reference signal (CSI-RS) by using the receiver on the basis of CSI-RS configuration information for a first domain antenna group of a two-dimensional antenna structure, the CSI-RS configuration information for the first domain antenna group being provided from the base station, report to the base station first CSI for the first domain antenna group, the first CSI being generated by using the first CSI-RS, by using the transmitter, receive from the base station a second CSI-RS by using the receiver based on CSI-RS configuration information for a second domain antenna group of the two-dimensional antenna structure, the CSI-RS configuration information for the second domain antenna group being provided from the base station, and report to the base station second CSI for the second domain antenna group, the second CSI being generated by using the second CSI-RS, by using the transmitter, wherein the CSI-RS configuration information for the second domain antenna group is determined based on the first CSI, and wherein the CSI-RS configuration information for the first domain antenna group is provided statically, and the CSI-RS configuration information for the second domain antenna group is provided dynamically.

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

• providing a user equipment with CSI-RS configuration information for a first domain antenna group of a two-dimensional antenna structure of the base station and transmitting a first channel status information-reference signal (CSI-RS) to the user equipment based on CSI-RS configuration information for the first domain antenna group;
• receiving from the user equipment first CSI for the first domain antenna group, the first CSI being generated in the user equipment by using the first CSI-RS;
• providing the user equipment with CSI-RS configuration information for a second domain antenna group of the two-dimensional antenna structure and transmitting a second CSI-RS to the user equipment based on the CSI-RS configuration information for the second domain antenna group;
• and
• receiving from the user equipment the second CSI-RS for the second domain antenna group, the second CSI being generated in the user equipment by using the second CSI-RS,
• wherein the CSI-RS configuration information for the second domain antenna group is determined based on the first CSI, and
• wherein the CSI-RS configuration information for the first domain antenna group is provided statically, and the CSI-RS configuration information for the second domain antenna group is provided dynamically.

A base station for receiving channel status information (CSI) in a wireless communication system, the base station comprising:

• a receiver;
• a transmitter;
• and
• a processor,
• wherein the processor is configured to provide a user equipment with CSI-RS configuration information for a first domain antenna group of a two-dimensional antenna structure of the base station and transmit a first channel status information-reference signal (CSI-RS) to the user equipment based on CSI-RS configuration information for the first domain antenna group, receive from the user equipment first CSI for the first domain antenna group, the first CSI being generated in the user equipment by using the first CSI-RS, provide the user equipment with CSI-RS configuration information for a second domain antenna group of the two-dimensional antenna structure and transmit a second CSI-RS to the user equipment based on the CSI-RS configuration information for the second domain antenna group, and receive from the user equipment the second CSI-RS for the second domain antenna group, the second CSI being generated in the user equipment by using the second CSI-RS, wherein the CSI-RS configuration information for the second domain antenna group is determined based on the first CSI, and wherein the CSI-RS configuration information for the first domain antenna group is provided statically, and the CSI-RS configuration information for the second domain antenna group is provided dynamically.