# US 12,120,681 B2 · Method and apparatus for transmitting and receiving wireless signal in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,681 B2 - Document ID: US12120681B2 - Status: Granted - Kind: B2 - Application number: 18/159,432 - Filed: 2023-01-25 - Published: 2023-06-01 - Granted: 2024-10-15 - Earliest claimed: 2019-11-06 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Suckchel Yang; Seonwook Kim - Web page: https://patentgrep.com/patent/US12120681B2 ## CPC - H04W 72/1273: of downlink data flows - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/121: for groups of terminals or users - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present disclosure relates to a wireless communication system, and specifically, a method and an apparatus therefor, the method comprising: receiving at least one PDSCH, wherein each PDSCH belongs to one of two PDSCH groups; receiving DCI for scheduling a PUSCH, wherein the DCI includes a single DAI related to only one of the two PDSCH groups; and transmitting the control information including an A/N codebook for at least one of the two PDSCH groups. ## Claims ### Claim 1 A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving first downlink control information (DCI), wherein the first DCI includes a single physical downlink shared channel (PDSCH) group index value and a value of a number of requested PDSCH groups, and wherein a first PDSCH group index of a first PDSCH group of two PDSCH groups is set to the single PDSCH group index value and a second PDSCH group index of a second PDSCH group of the two PDSCH groups that is different from the first PDSCH group index is determined based on the single PDSCH group index value; receiving PDSCHs, wherein each of the PDSCHs belongs to one of the two PDSCH groups; receiving second DCI for scheduling a physical uplink shared channel (PUSCH), wherein the second DCI includes a single downlink assignment index (DAI); and transmitting hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information, wherein based on i) the HARQ-ACK information including ACK/negative ACK (NACK) information for both the first PDSCH group and the second PDSCH group and ii) the first PDSCH group index is 0, the single DAI is used to generate a HARQ-ACK codebook for the first PDSCH group. ### Claim 2 (depends on 1) The method of claim 1, wherein, based on HARQ-ACK feedback for only one PDSCH group among the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes only ACK/NACK information for the first PDSCH group. ### Claim 3 (depends on 1) The method of claim 1, wherein, based on HARQ-ACK feedback for the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes ACK/NACK information for both the first PDSCH group and the second PDSCH group. ### Claim 4 (depends on 1) The method of claim 1, wherein, based on the HARQ-ACK information including ACK/NACK information for both the first PDSCH group and the second PDSCH group, a size of a HARQ-ACK codebook for a remaining PDSCH group among the two PDSCH groups is determined based on a total-DAI used for scheduling a PDSCH of corresponding PDSCH group. ### Claim 5 (depends on 1) The method of claim 1, wherein the HARQ-ACK information is transmitted in an unlicensed band. ### Claim 6 A user equipment (UE) operating in a wireless communication system, the UE comprising: at least one transceiver for transmitting and receiving a wireless signal; and at least one processor for controlling the at least one transceiver, wherein the at least one processor configured to: receive first downlink control information (DCI), wherein the first DCI includes a single physical downlink shared channel (PDSCH) group index value and a value of a number of requested PDSCH groups, and wherein a first PDSCH group index of a first PDSCH group of two PDSCH groups is set to the single PDSCH group index value and a second PDSCH group index of a second PDSCH group of the two PDSCH groups that is different from the first PDSCH group index is determined based on the single PDSCH group index value; receiving PDSCHs, wherein each of the PDSCHs belongs to one of the two PDSCH groups; receiving second DCI for scheduling a physical uplink shared channel (PUSCH), wherein the second DCI includes a single downlink assignment index (DAI); and transmitting hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information, wherein based on i) the HARQ-ACK information including ACK/negative ACK (NACK) information for both the first PDSCH group and the second PDSCH group and ii) the first PDSCH group index is 0, the single DAI is used to generate a HARQ-ACK codebook for the first PDSCH group. ### Claim 7 (depends on 6) The UE of claim 6, wherein, based on HARQ-ACK feedback for only one PDSCH group among the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes only ACK/NACK information for the first PDSCH group. ### Claim 8 (depends on 6) The UE of claim 6, wherein, based on HARQ-ACK feedback for the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes ACK/NACK information for both the first PDSCH group and the second PDSCH group. ### Claim 9 (depends on 6) The UE of claim 6, wherein, based on the HARQ-ACK information including ACK/NACK information for both the first PDSCH group and the second PDSCH group, a size of a HARQ-ACK codebook for a remaining PDSCH group among the two PDSCH groups is determined based on a total-DAI used for scheduling a PDSCH of corresponding PDSCH group. ### Claim 10 (depends on 6) The UE of claim 6, wherein the HARQ-ACK information is transmitted in an unlicensed band. ### Claim 11 A base station operating in a wireless communication system, the base station comprising: at least one transceiver for transmitting and receiving a wireless signal; and at least one processor for controlling the at least one transceiver, wherein the at least one processor configured to: transmit first downlink control information (DCI), wherein the first DCI includes a single physical downlink shared channel (PDSCH) group index value and a value of a number of requested PDSCH groups, and wherein a first PDSCH group index of a first PDSCH group of two PDSCH groups is set to the single PDSCH group index value and a second PDSCH group index of a second PDSCH group of the two PDSCH groups that is different from the first PDSCH group index is determined based on the single PDSCH group index value; transmit PDSCHs, wherein each of the PDSCHs belongs to one of the two PDSCH groups; transmit second DCI for scheduling a physical uplink shared channel (PUSCH), wherein the second DCI includes a single downlink assignment index (DAI); and receive hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information, wherein based on i) the HARQ-ACK information including ACK/negative ACK (NACK) information for both the first PDSCH group and the second PDSCH group and ii) the first PDSCH group index is 0, the single DAI is used to generate a HARQ-ACK codebook for the first PDSCH group. ### Claim 12 (depends on 11) The base station of claim 11, wherein, based on HARQ-ACK feedback for only one PDSCH group among the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes only ACK/NACK information for the first PDSCH group. ### Claim 13 (depends on 11) The base station of claim 11, wherein, based on HARQ-ACK feedback for the two PDSCH groups being requested by the value of a number of requested PDSCH groups in the first DCI, the HARQ-ACK information includes ACK/NACK information for both the first PDSCH group and the second PDSCH group. ### Claim 14 (depends on 11) The base station of claim 11, wherein, based on the HARQ-ACK information including ACK/NACK information for both the first PDSCH group and the second PDSCH group, a size of a HARQ-ACK codebook for a remaining PDSCH group among the two PDSCH groups is determined based on a total-DAI used for scheduling a PDSCH of corresponding PDSCH group. ### Claim 15 (depends on 11) The base station of claim 11, wherein the HARQ-ACK information is transmitted in an unlicensed band.