Method for eliminating interference between cells in wireless communication system and apparatus thereof

A terminal to transmit and receive signals in a communication system, the terminal comprising:

• a transceiver configured to receive and transmit a signal;
• and
• a controller configured to:
• receive a signal from a base station and at least one interference signal from at least one other base station,
• identify a first expected value of a signal to interference plus noise ratio (SINR) in consideration that the signal and the at least one interference signal are transmitted based on a first beamforming scheme,
• identify a second expected value of a SINR in consideration that the signal and the at least one interference signal are transmitted based on a second beamforming scheme,
• select a beamforming scheme for the terminal based on the first expected value of the SINR and the second expected value of the SINR, and
• transmit the selected beamforming scheme to the base station,
• wherein the selected beamforming scheme is used to determine whether the first beamforming scheme or the second beamforming scheme maximizes a weight-sum rate (WSR) of the communication system.

A method to transmit and receive signals by a base station in a communication system, the method comprising:

• transmitting a signal to a plurality of terminals;
• receiving information on a beamforming scheme selected by the plurality of terminals based on the transmitted signal;
• and
• selecting a beamforming scheme applied to the plurality of terminals that, based on the information, maximizes a weight-sum rate (WSR) of the communication system,
• wherein a beamforming scheme selected by a first terminal of the plurality of terminals is identified a first expected value of a signal to interference plus noise ratio (SINR) and a second expected value of the SINR,
• wherein the first expected value of the SINR is identified in consideration that a signal for the first terminal and at least one interference signal are transmitted based on a first beamforming scheme, and
• wherein the second expected value of the SINR is identified in consideration that the signal for the first terminal and the at least one interference signal are transmitted based on a second beamforming scheme.

A base station to transmit and receive signals in a communication system, the base station comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller configured to:
• transmit a signal to a plurality of terminals,
• receive information on a beamforming scheme selected by the plurality of terminals based on the transmitted signal, and
• select a beamforming scheme applied to the plurality of terminals that, based on the information, maximizes a weight-sum rate (WSR) of the communication system,
• wherein a beamforming scheme selected by a first terminal of the plurality of terminals is identified a first expected value of a signal to interference plus noise ratio (SINR) and a second expected value of the SINR,
• wherein the first expected value of the SINR is identified in consideration that a signal for the first terminal and at least one interference signal are transmitted based on a first beamforming scheme, and
• wherein the second expected value of the SINR is identified in consideration that the signal for the first terminal and the at least one interference signal are transmitted based on a second beamforming scheme.