Method and apparatus for transmitting or receiving information for artificial intelligence based channel state information feedback in wireless communication system

1 . A method for a user equipment (UE) in a wireless communication system, the method comprising:

receiving channel state information (CSI) report configuration information from a base station (BS);

generating compressed CSI feedback data through an encoder comprised by the UE based on the CSI report configuration information and generating side information relating to the compressed CSI feedback data; and

transmitting the compressed CSI feedback data and the side information to the BS,

wherein the UE further comprises a quantizer,

wherein the compressed CSI feedback data is generated by having CSI data compressed by the encoder and quantized by the quantizer, and

wherein the side information includes information related to the quantizer and at least one of information about a data compression rule of the encoder, information related to DFT beams, or information related to delay components.

2 . The method of claim 1 , wherein the CSI report configuration information is received through radio resource control (RRC) signaling.

3 . The method of claim 1 , wherein the UE further comprises a pre-processor, and

wherein the compressed CSI feedback data is generated by having CSI data pre-processed by the pre-processor, compressed by the encoder, and quantized by the quantizer.

4 . The method of claim 3 , wherein the side information further comprises information relating to the pre-processor.

5 . The method of claim 3 , wherein the pre-processor is configured to reduce a dimension of the CSI data and output resultant CSI data.

6 . The method of claim 1 , wherein the side information corresponds to a plurality of the compressed CSI feedback data and comprises a timer.

7 . A user equipment (UE) for a wireless communication system, the UE comprising:

an encoder;

a quantizer;

a transceiver; and

at least one processor,

wherein the at least one processor is configured to:

receive channel state information (CSI) report configuration information from a base station (BS) through the transceiver;

generate compressed CSI feedback data through the encoder based on the CSI report configuration information and generate side information relating to the compressed CSI feedback data; and

transmit the compressed CSI feedback data and the side information to the BS through the transceiver,

wherein the compressed CSI feedback data is generated by having CSI data compressed by the encoder and quantized by the quantizer, and

wherein the side information includes information related to the quantizer and at least one of information about a data compression rule of the encoder, information related to DFT beams, or information related to delay components.

8 . The UE of claim 7 , wherein the CSI report configuration information is received through radio resource control (RRC) signaling.

9 . The UE of claim 7 , further comprising a pre-processor, wherein the at least one processor is configured to generate the compressed CSI feedback data by pre-processing CSI data through the pre-processor, compressing the pre-processed CSI data through the encoder, and quantizing the compressed CSI data through the quantizer.

10 . The UE of claim 9 , wherein the side information further comprises information relating to the pre-processor.

11 . The UE of claim 9 , wherein the at least one processor is configured to pre-process the CSI data by reducing a dimension of the CSI data through the pre-processor.

12 . The UE of claim 7 , wherein the side information corresponds to a plurality of the compressed CSI feedback data and comprises a timer.

13 . A method for a base station (BS) in a wireless communication system, the method comprising:

transmitting channel state information (CSI) report configuration information to a user equipment (UE);

receiving, from the UE, compressed CSI feedback data determined based on the CSI report configuration information and side information relating to the compressed CSI feedback data, wherein the compressed CSI feedback data is generated by having CSI data compressed by an encoder and quantized by a quantizer, and wherein the side information includes information related to the quantizer and at least one of information about a data compression rule of an encoder, information related to DFT beams, or information related to delay components;

reconstructing the compressed CSI feedback data through a decoder comprised by the BS; and

post-processing the reconstructed CSI feedback data through a post-processor comprised by the BS based on the side information.