# US 12,003,337 B2 · Method and apparatus for transmitting/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 12,003,337 B2 - Document ID: US12003337B2 - Status: Granted - Kind: B2 - Application number: 17/508,478 - Filed: 2021-10-22 - Published: 2022-04-28 - Granted: 2024-06-04 - Earliest claimed: 2020-10-23 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Youngdae Lee; Suckchel Yang; Joonkui Ahn; Seonwook Kim - Web page: https://patentgrep.com/patent/US12003337B2 ## CPC - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 1/1825: Adaptation of specific ARQ protocol parameters according to transmission conditions - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1896: {ARQ related signaling} - H04L 2001/0093: {Point-to-multipoint} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract According to an embodiment of the present invention a UE may receive downlink control information (DCI), perform data reception and determine HARQ-ACK based on a result of the data reception, wherein the HARQ-ACK is reported through a physical uplink control channel (PUCCH) based on either: a first reporting type in which the HARQ-ACK reporting is performed for NACK only, or a second reporting type in which the HARQ-ACK reporting is performed for ACK/NACK both, and the UE may select one of the first reporting type and the second reporting type and a resource of the PUCCH based on the DCI. ## Claims ### Claim 1 A method of receiving a signal by a user equipment (UE) in a wireless communication system, the method comprising: receiving a physical downlink control channel (PDCCH) carrying downlink control information (DCI); performing data reception based on the DCI; and determining hybrid automatic repeat request (HARQ)-acknowledgement (ACK) based on a result of the data reception, wherein the HARQ-ACK is reported through a physical uplink control channel (PUCCH) based on either: a first reporting type in which the HARQ-ACK reporting is performed for negative-ACK (NACK) only, or a second reporting type in which the HARQ-ACK reporting is performed for ACK/NACK both, and wherein the UE selects one of the first reporting type and the second reporting type based on the DCI, and selects a resource of the PUCCH based on the DCI. ### Claim 2 (depends on 1) The method according to claim 1, wherein the DCI includes information indicating one of the first reporting type and the second reporting type and information indicating the resource of the PUCCH. ### Claim 3 (depends on 1) The method according to claim 1, wherein, for the first reporting type, the HARQ-ACK reporting on the PUCCH is skipped for ACK. ### Claim 4 (depends on 1) The method according to claim 1, wherein the UE determines, based on the DCI, whether to enable or disable a HARQ process for the data reception. ### Claim 5 (depends on 4) The method according to claim 4, wherein the DCI includes information indicating whether to enable or disable the HARQ process. ### Claim 6 (depends on 4) The method according to claim 4, wherein based on a field of the DCI being a specific value, the UE determines to disable the HARQ process. ### Claim 7 (depends on 1) The method according to claim 1, wherein the UE flushes a reception buffer upon an expiry of a retransmission-related timer. ### Claim 8 (depends on 1) The method according to claim 1, wherein the UE determines not to perform the HARQ-ACK reporting based on a number of retransmissions performed for the data being a maximum retransmission number. ### Claim 9 (depends on 1) The method according to claim 1, wherein the data reception is related to at least one of a plurality of repeated transmissions, and wherein the first reporting type and the second reporting types are used for different transmissions respectively from among the plurality of repeated transmissions. ### Claim 10 (depends on 1) The method according to claim 1, wherein the data reception is related to a multicast and broadcast service (MBS). ### Claim 11 (depends on 1) The method according to claim 1, wherein the DCI is common for a plurality of UEs receiving the MBS. ### Claim 12 (depends on 1) A non-transitory computer readable medium recorded thereon program codes for performing the method according to claim 1. ### Claim 13 A device for wireless communication, the device comprising: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, the operations comprising: receiving a physical downlink control channel (PDCCH) carrying downlink control information (DCI); performing data reception based on the DCI; and determining hybrid automatic repeat request (HARQ)-acknowledgement (ACK) based on a result of the data reception, wherein the HARQ-ACK is reported through a physical uplink control channel (PUCCH) based on either: a first reporting type in which the HARQ-ACK reporting is performed for negative-ACK (NACK) only, or a second reporting type in which the HARQ-ACK reporting is performed for ACK/NACK both, and wherein the processor selects one of the first reporting type and the second reporting type based on the DCI, and selects a resource of the PUCCH based on the DCI. ### Claim 14 (depends on 13) The device according to claim 13, further comprising; a transceiver configured to transmit or receive a signal under control of the processor. ### Claim 15 (depends on 14) The device according to claim 14, wherein the device is a user equipment (UE) configured to perform 3rd generation partnership project (3GPP)-based wireless communication.