Apparatus and method for transmitting and receiving transmission beam information and channel quality information in communication system supporting multi-user multi-input multi-output scheme

A method for transmitting transmission beam (Tx beam) information by a base station (BS) in a communication system supporting a multi-user multi-input multi-output (MU-MIMO) scheme, the method comprising:

• receiving, from a first user equipment (UE), first information on a first Tx beam selected by the first UE;
• transmitting, to at least one second UE, the first information on the first Tx beam selected by the first UE;
• and
• receiving, from the at least one second UE, channel quality information,
• wherein the channel quality information is determined based on a signal to interference and noise ratio (SINR) by using a strength of the first Tx beam as a strength of the interference.

A first user equipment (UE) for receiving transmission beam (Tx beam) information in a communication system supporting a multi-user multi-input multi-output (MU-MIMO) scheme, the first UE comprising:

• a transmitter;
• a receiver;
• and
• a processor configured to:
• transmit, to a base station (BS), first information on a first Tx beam selected by the UE;
• receive, from the BS, second information on a second Tx beam selected by at least one second UE;
• and
• transmit, to the BS, the channel quality information,
• wherein the channel quality information is determined based on a signal to interference and noise ratio (SINR) by using a strength of the second Tx beam as a strength of the interference.

A base station (BS) for transmitting transmission beam (Tx beam) information in a communication system supporting a multi-user multi-input multi-output (MU-MIMO) scheme, the BS comprising:

• a transmitter;
• a receiver;
• and
• a processor configured to:
• receive, from a first user equipment (UE), first information on a first Tx beam selected by the first UE;
• transmit, to at least one second UE, the first information on the first Tx beam selected by the first UE;
• and
• receive, from the at least one second UE, channel quality information,
• wherein the channel quality information is determined based on a signal to interference and noise ratio (SINK) by using a strength of the first Tx beam as a strength of the interference.