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EP-4742550-A1 - METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM

EP4742550A1EP 4742550 A1EP4742550 A1EP 4742550A1EP-4742550-A1

Abstract

A method by which a terminal transmits a signal in a wireless communication system, according to at least one of embodiments disclosed in the present specification, comprises the steps of: receiving downlink control information (DCI) for uplink scheduling; and transmitting a physical uplink shared channel (PUSCH) in which channel state information (CSI) is multiplexed on the basis of the DCI, wherein, on the basis of a rank of the PUSCH transmission exceeding 4 and the PUSCH including a plurality of codewords (CWs), the CSI is multiplexed on a CW having the highest modulation and coding scheme (MCS) among the plurality of CWs, and the terminal may not expect that an uplink shared channel (UL-SCH) indication field in the DCI will be set to a first value for not performing UL-SCH transmission

Inventors

  • PARK, HAEWOOK
  • YANG, SUCKCHEL
  • KIM, HYUNGTAE
  • KANG, JIWON

Assignees

  • LG Electronics Inc.

Dates

Publication Date
20260513
Application Date
20240701

Claims (15)

  1. A method of transmitting a signal by a user equipment (UE) in a wireless communication system, the method comprising: receiving downlink control information (DCI) for uplink scheduling; and transmitting, based on the DCI, a physical uplink shared channel (PUSCH) on which channel state information (CSI) is multiplexed, wherein based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of codewords (CWs), the CSI is multiplexed on a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs, and wherein the UE does not expect that an uplink shared channel (UL-SCH) indicator field in the DCI is set to a first value for not performing UL-SCH transmission.
  2. The method of claim 1, wherein based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, all of the plurality of CWs include UL-SCHs, respectively.
  3. The method of claim 1, wherein based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, no CW is configured to include only the CSI.
  4. The method of claim 1, wherein the DCI includes the UL-SCH indicator field, and wherein based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UE assumes that the UL-SCH indicator field is set to a second value for performing the UL-SCH transmission.
  5. The method of claim 1, wherein based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UE assumes that a size of the UL-SCH indicator field is 0 bits.
  6. The method of claim 1, wherein the CSI and a first UL-SCH are multiplexed on the CW having the highest MCS, and wherein a second UL-SCH is multiplexed on another CW without the CSI.
  7. The method of claim 1, wherein based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UL-SCH indicator field is configured to provide information other than information about whether to perform the UL-SCH transmission.
  8. The method of claim 1, wherein a size of the UL-SCH indicator field in the DCI is determined based on the rank of the PUSCH transmission.
  9. The method of claim 1, wherein the DCI includes a CSI request field set to a non-zero value.
  10. A computer-readable recording medium having recorded thereon a program for performing the method of claim 1.
  11. An apparatus for wireless communication, the apparatus comprising: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein the operations of the processor include: receiving downlink control information (DCI) for uplink scheduling; and transmitting, based on the DCI, a physical uplink shared channel (PUSCH) on which channel state information (CSI) is multiplexed, wherein based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of codewords (CWs), the CSI is multiplexed on a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs, and wherein the apparatus does not expect that an uplink shared channel (UL-SCH) indicator field in the DCI is set to a first value for not performing UL-SCH transmission.
  12. The apparatus of claim 11, further comprising a transceiver, wherein the apparatus is a user equipment (UE) operating in a wireless communication system.
  13. The apparatus of claim 11, wherein the apparatus is a processing device configured to control a user equipment (UE) operating in a wireless communication system.
  14. A method of receiving a signal by a base station (BS) in a wireless communication system, the method comprising: transmitting downlink control information (DCI) for uplink scheduling; and receiving, based on the DCI, a physical uplink shared channel (PUSCH) on which channel state information (CSI) is multiplexed, wherein based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of codewords (CWs), the BS sets a uplink shared channel (UL-SCH) indicator field in the DCI to a second value for UL-SCH scheduling for all of the plurality of CWs, and obtains the CSI from a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs.
  15. A base station (BS) for wireless communication, the BS comprising: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein the operations of the processor include: transmitting downlink control information (DCI) for uplink scheduling; and receiving, based on the DCI, a physical uplink shared channel (PUSCH) on which channel state information (CSI) is multiplexed, wherein based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of codewords (CWs), the BS sets a uplink shared channel (UL-SCH) indicator field in the DCI to a second value for UL-SCH scheduling for all of the plurality of CWs, and obtains the CSI from a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs.

Description

TECHNICAL FIELD The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting or receiving a downlink/uplink radio signal in a wireless communication system. BACKGROUND Generally, a wireless communication system is developing to diversely cover a wide range to provide such a communication service as an audio communication service, a data communication service and the like. The wireless communication is a sort of a multiple access system capable of supporting communications with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). For example, the multiple access system may be any of a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency division multiple access (SC-FDMA) system. DISCLOSURE TECHNICAL PROBLEM The technical task to be achieved is to provide a method and apparatus for accurately and efficiently performing wireless signal transmission and reception. The technical task to be achieved is not limited to this, and other technical tasks can be inferred from embodiments. TECHNICAL SOLUTION According to an aspect, a method for transmitting a signal by a user equipment (UE) in a wireless communication system may include receiving downlink control information (DCI) for uplink scheduling, and transmitting a physical uplink shared channel (PUSCH) on which channel state information (CSI) is multiplexed based on the DCI. Based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of codewords (CWs), the CSI may be multiplexed on a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs. The UE may not expect that an uplink shared channel (UL-SCH) indicator field in the DCI is set to a first value (e.g., 0) for not performing UL-SCH transmission. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, all of the plurality of CWs may include UL-SCHs, respectively. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, no CW may be configured to include only the CSI. The DCI may include the UL-SCH indicator field. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UE may assume that the UL-SCH indicator field is set to a second value for performing the UL-SCH transmission. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UE may assume that a size of the UL-SCH indicator field is 0 bits. The CSI and a first UL-SCH may be multiplexed on the CW having the highest MCS. A second UL-SCH may be multiplexed on another CW without the CSI. Based on the rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the UL-SCH indicator field may be configured to provide information other than information about whether to perform the UL-SCH transmission. A size of the UL-SCH indicator field in the DCI may be determined based on the rank of the PUSCH transmission. The DCI may include a CSI request field set to a non-zero value. According to another aspect, a computer-readable recording medium having recorded thereon a program for performing the above method may be provided. According to another aspect, an apparatus for wireless communication may include a memory configured to store instructions, and a processor configured to perform operations by executing the instructions. The operations of the processor may include receiving DCI for uplink scheduling, and transmitting a PUSCH on which CSI is multiplexed based on the DCI. Based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including the plurality of CWs, the CSI may be multiplexed on a CW having a highest modulation and coding scheme (MCS) among the plurality of CWs. The apparatus may not expect that a UL-SCH indicator field in the DCI is set to a first value for not performing UL-SCH transmission. The apparatus may further include a transceiver. The apparatus may be a UE operating in a wireless communication system. The apparatus may be a processing device configured to control a UE operating in a wireless communication system. According to another aspect, a method for receiving a signal by a base station (BS) in a wireless communication system may include transmitting DCI for uplink scheduling, and receiving a PUSCH on which CSI is multiplexed based on the DCI. Based on a rank of the PUSCH transmission being greater than 4 and the PUSCH including a plurality of CWs, the BS may set a UL-SCH indicator field in the DCI to a second value for UL-SCH scheduling for all of the plurality of CWs, and obtain the CSI from a CW ha