Method and device for transmitting signal through reflection plate in wireless communication system

A terminal in a wireless communication system, comprising:

• a transceiver;
• and
• a processor coupled to the transceiver,
• wherein the processor is configured to:
• receive first control information from a base station;
• transmit at least one reference signal to the base station based on the first control information;
• receive second control information from the base station;
• identify information related to a channel based on the second control information;
• and
• transmit a signal based on the information related to the channel,
• wherein the at least one reference signal is transmitted through a reflecting surface selected by the terminal based on the first control information, and
• wherein the second control information includes phase information related to the reflecting surface.

A base station in a wireless communication system, comprising:

• a transceiver;
• and
• a processor coupled to the transceiver,
• wherein the processor is configured to:
• transmit first control information to each of a plurality of terminals;
• receive at least one reference signal from a first terminal among the plurality of terminals;
• generate second control information including phase information related to a reflecting surface based on the at least one reference signal;
• transmit the second control information to the first terminal;
• and
• receive a signal from the first terminal based on information related to a channel,
• which is identified by the first terminal based on the second control information,
• wherein the at least one reference signal is transmitted through the reflecting surface selected by the first terminal based on the first control information, and
• wherein the second control information includes phase information related to the reflecting surface.