Method and device for transmitting or receiving quantization-based channel state information in wireless communication system

A method performed by a terminal in a wireless communication system, the method comprising:

• receiving, from a network, at least one channel state information (CSI)-reference signal (RS);
• and
• transmitting, to the network, at least one CSI report based on the at least one CSI-RS,
• wherein the at least one CSI report includes first CSI including a quantization result of compressed CSI, and second CSI including quantization reference information related to the first CSI.

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

• at least one transceiver;
• and
• at least one processor coupled with the at least one transceiver,
• wherein the at least one processor is configured to:
• receive, from a network, through the at least one transceiver, at least one channel state information (CSI)-reference signal (RS);
• and
• transmit, to the network, through the at least one transceiver, at least one CSI report based on the at least one CSI-RS,
• wherein the at least one CSI report includes first CSI including a quantization result of compressed CSI, and second CSI including quantization reference information related to the first CSI.

A base station in a wireless communication system, the base station comprising:

• at least one transceiver;
• and
• at least one processor coupled with the at least one transceiver,
• wherein the at least one processor is configured to:
• transmit, to a terminal, through the at least one transceiver, at least one channel state information (CSI)-reference signal (RS);
• and
• receive, from the terminal, through the at least one transceiver, at least one CSI report based on the at least one CSI-RS,
• wherein the at least one CSI report includes first CSI including a quantization result of compressed CSI, and second CSI including quantization reference information related to the first CSI, and
• wherein the compressed CSI is obtained through a de-quantization based on the quantization reference information.