Selective channel feedback method and apparatus for use in wireless communication system

A channel measurement method for a terminal capable of supporting Multiuser Multiple-Input Multiple-Output (MU-MIMO), the method comprising:

• receiving control information from a base station including a group identifier instructing the terminal to perform signal measurement and generate signal measurement feedback, wherein the base station previously allocated the group identifier to a plurality of terminals, including the terminal, for signal measurement feedback;
• performing signal measurement and generating signal measurement feedback;
• and
• transmitting the signal measurement feedback to the base station,
• wherein the plurality of terminals allocated the group identifier perform signal measurement simultaneously and transmit their respective signal measurement feedback simultaneously.

A base station capable of supporting Multiuser Multiple-Input Multiple-Output (MU-MIMO), comprising:

• a transceiver;
• and
• a controller which:
• allocates a group identifier to a plurality of terminals for signal measurement feedback;
• and
• controls the transceiver to transmit control information including the group identifier to instruct the plurality of terminals to perform signal measurement and generate signal measurement feedback,
• wherein the transceiver simultaneously receives signal measurement feedback transmitted by the plurality of terminals allocated the group identifier.

A terminal capable of supporting Multiuser Multiple-Input Multiple-Output (MU-MIMO), comprising:

• a transceiver;
• and
• a controller which, when the transceiver receives control information from a base station including a group identifier instructing the terminal to perform signal measurement and generate signal measurement feedback, controls the terminal to perform signal measurement, to generate signal measurement feedback, and to transmit the signal measurement feedback to the base station,
• wherein the base station previously allocated the group identifier to a plurality of terminals, including the terminal, for signal measurement feedback, and
• wherein the plurality of terminals allocated the group identifier perform their respective signal measurements simultaneously and transmit their respective signal measurement feedback simultaneously.