Method and apparatus for channel quality estimation in consideration of interference control and coordinated communication in cellular system

A method by a base station including a serving transmission point and neighboring transmission points in a wireless communication system, the method comprising:

• receiving a sounding reference signal from a terminal;
• identifying a reception power of the sounding reference signal received at each of the serving transmission point and the neighboring transmission points, wherein the serving transmission point serves the terminal and the neighboring transmission points are neighbors to the serving transmission point;
• selecting N transmission points in order of high reception power among the serving transmission point and the neighboring transmission points based on ordering the reception power for each of the serving transmission point and neighboring transmission points from highest to lowest reception power based on a comparison of the reception powers;
• generating channel status information (CSI) configuration information including CSI process configurations configured for measuring transmission powers of the selected N transmission points;
• transmitting the CSI configuration information to the terminal;
• and
• receiving channel quality information (CQI) from the terminal, the CQI being generated by the terminal based on a signal-to-interference-plus-noise ratio measured by the terminal based on the CSI configuration information,
• wherein the CSI configuration information further includes CSI interference measurement configurations, and
• wherein the CSI interference measurement configurations comprise one CSI interference measurement configuration which is configured for measuring transmission powers of all of the serving and neighboring transmission points.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to control the transceiver to:
• transmit a sounding reference signal to a plurality of base stations that includes a serving transmission point and neighboring transmission points, wherein the serving transmission point serves the terminal and the neighboring transmission points are neighbors to the serving transmission point,
• receive channel status information (CSI) configuration information including CSI process configurations configured for measuring at least one transmission power of N transmission points, wherein the N transmission points are selected in order of high reception power among the serving transmission point and the neighboring transmission points, based on a result of ordering reception powers of the sounding reference signal received by each of the serving transmission point and the neighboring transmission points from highest to lowest reception power based on a comparison of the reception powers,
• measure a signal-to-interference-plus-noise ratio based on the CSI configuration information;
• generate channel quality information (CQI) based on the signal-to-interference-plus-noise ratio;
• and
• transmit the CQI to the serving transmission point,
• wherein the CSI configuration information further includes CSI interference measurement configurations, and
• wherein the CSI interference measurement configurations comprise one CSI interference measurement configuration which is configured for measuring transmission powers of all of the serving and neighboring transmission points.

A base station of a plurality of base stations including a serving transmission point and neighboring transmission points in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• control the transceiver to receive a sounding reference signal from a terminal,
• identify a reception power of the sounding reference signal received at each of the serving transmission point and the neighboring transmission points, wherein the serving transmission point serves the terminal and the neighboring transmission points are neighbors to the serving transmission point,
• select N transmission points in order of high reception power among the serving transmission point and the neighboring transmission points based on ordering the reception power for each of the serving transmission point and neighboring transmission points from highest to lowest reception power based on a comparison of the reception powers,
• generate channel status information (CSI) configuration information including CSI process configurations configured for measuring transmission powers of the selected N transmission points,
• control the transceiver to transmit CSI configuration information to the terminal, and
• control the transceiver to receive channel quality information (CQI) from the terminal, the CQI being generated by the terminal based on a signal-to-interference-plus-noise ratio measured by the terminal based on the CSI configuration information,
• wherein the CSI configuration information further includes CSI interference measurement configurations, and
• wherein the CSI interference measurement configurations comprise one CSI interference measurement configuration which is configured for measuring transmission powers of all of the serving and neighboring transmission points.