# US 12,119,943 B2 · Method and apparatus for HARQ feedback > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,943 B2 - Document ID: US12119943B2 - Status: Granted - Kind: B2 - Application number: 17/634,661 - Filed: 2019-08-13 - Published: 2022-12-29 - Granted: 2024-10-15 - Earliest claimed: 2019-08-13 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Qin Mu - Web page: https://patentgrep.com/patent/US12119943B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04L 1/1896: {ARQ related signaling} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/085: {collision avoidance} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04W 74/0836: with 2-step access - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and apparatus for HARQ feedback includes, after receiving a first random access message Msg.A sent by each of at least one terminal, a base station returning a second random access message Msg.B to the at least one terminal. The Msg.B is configured to indicate respective feedback parameters of HARQ feedback terminals in the at least one terminal, and respective HARQ feedback resources of the HARQ feedback terminals are different. The base station receives, on the respective HARQ feedback resources of retransmission terminals, HARQ feedback sent for the Msg.B by the retransmission terminals respectively. ## Claims ### Claim 1 A method for hybrid automatic repeat request (HARQ) feedback, performed by a base station, comprising: returning a second random access message Msg.B to at least one terminal after receiving a first random access message Msg.A sent by each of the at least one terminal, wherein the Msg.B is configured to indicate a HARQ feedback resource of each HARQ feedback terminal in the at least one terminal, the Msg.B comprises physical uplink control channel (PUCCH) parameters of respective HARQ feedback terminals, and the HARQ feedback resources of respective HARQ feedback terminals are different; and receiving a HARQ feedback sent by each HARQ feedback terminal for the Msg.B on the HARQ feedback resource of each HARQ feedback terminal; wherein the PUCCH parameters comprise a time parameter k and a PUCCH resource indicator ΔPRI; a time point of sending the HARQ feedback is calculated based on the time parameter k, and a serial number of PUCCH resource for sending the HARQ feedback in a PUCCH resource set is calculated based on the PUCCH resource indicator ΔPRIS and the PUCCH resource set is a candidate PUCCH resource set configured by a high signaling. ### Claim 2 (depends on 1) The method according to claim 1, wherein the PUCCH parameters of respective HARQ feedback terminals comprise a time parameter k of each HARQ feedback terminal, and the PUCCH resource indicator ΔPRI of each HARQ feedback terminal. ### Claim 3 (depends on 2) The method according to claim 2, wherein the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator ΔPRI of each HARQ feedback terminal are carried in proprietary information of each HARQ feedback terminal, wherein the proprietary information of each HARQ feedback terminal is carried in a PDSCH of the Msg.B. ### Claim 4 (depends on 1) The method according to claim 1, before receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B on the HARQ feedback resource of each HARQ feedback terminal, comprising: obtaining PUCCH resource offset information of each HARQ feedback terminal based on offset configuration information, wherein the PUCCH resource offset information is configured to indicate an offset of the PUCCH resource for sending the HARQ feedback relative to a reference PUCCH resource, the reference PUCCH resource is a PUCCH resource calculated based on a PUCCH resource indicator ΔPRI; and determining the HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal. ### Claim 5 (depends on 4) The method according to claim 4, wherein the offset configuration information comprises PUCCH resource offset information of each random access preamble sequence, and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information comprises: obtaining the PUCCH resource offset information of each HARQ feedback terminal by querying the offset configuration information based on a preamble sequence included in the Msg.A sent by each HARQ feedback terminal. ### Claim 6 (depends on 4) The method according to claim 4, wherein the Msg.B comprises respective proprietary information of the at least one terminal, and the offset configuration information comprises a PUCCH resource offset information corresponding to a location where the proprietary information is in the Msg.B; and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information comprises: obtaining the PUCCH resource offset information of each HARQ feedback terminal by querying the offset configuration information based on a location of the proprietary information of each HARQ feedback terminal in the Msg.B. ### Claim 7 A method for hybrid automatic repeat request (HARQ) feedback, performed by a target terminal, comprising: sending a first random access message Msg.A to a base station; receiving a second random access message Msg.B returned by the base station, wherein the Msg.B is configured to indicate a HARQ feedback resource of each HARQ feedback terminal in at least one terminal, the Msg.B comprises physical uplink control channel (PUCCH) parameters of respective HARQ feedback terminals, and the HARQ feedback resources of respective HARQ feedback terminals are different; wherein the PUCCH parameters comprise a time parameter k and a PUCCH resource indicator ΔPRI; a time point of sending the HARQ feedback is calculated based on the time parameter k, and a serial number of PUCCH resource for sending the HARQ feedback in a PUCCH resource set is calculated based on the PUCCH resource indicator ΔPRI; and the PUCCH resource set is a candidate PUCCH resource set configured by a high signaling; and sending a HARQ feedback to the base station in response to that the target terminal is any one of the respective HARQ feedback terminals. ### Claim 8 (depends on 7) The method according to claim 7, wherein the PUCCH parameters of respective HARQ feedback terminals comprise a time parameter k of each HARQ feedback terminal, and the PUCCH resource indicator ΔPRI of each HARQ feedback terminal. ### Claim 9 (depends on 8) The method according to claim 8, wherein the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator ΔPRI of each HARQ feedback terminal are carried in the proprietary information of each HARQ feedback terminal, wherein the proprietary information of each HARQ feedback terminal is carried in a PDSCH of the Msg.B. ### Claim 10 (depends on 7) The method according to claim 7, before sending the HARQ feedback to the base station on the HARQ feedback resource of the target terminal, further comprising: obtaining PUCCH resource offset information of the target terminal based on offset configuration information, wherein the PUCCH resource offset information is configured to indicate an offset of the PUCCH resource for sending the HARQ feedback relative to a reference PUCCH resource, and the reference PUCCH resource is a PUCCH resource calculated based on a PUCCH resource indicator ΔPRI; and determining the HARQ feedback resource of the target terminal based on the PUCCH resource offset information of the target terminal. ### Claim 11 (depends on 10) The method according to claim 10, wherein the offset configuration information comprises the PUCCH resource offset information of each random access preamble sequence; and obtaining the PUCCH resource offset information of the target terminal based on the offset configuration information comprises: obtaining the PUCCH resource offset information of the target terminal by querying the offset configuration information based on the preamble sequence in the Msg.A sent by the target terminal. ### Claim 12 (depends on 10) The method according to claim 10, wherein the Msg.B comprises proprietary information of each of the at least one terminal, and the offset configuration information comprises the PUCCH resource offset information corresponding to a location of the proprietary information in the Msg.B; and obtaining the PUCCH resource offset information of the target terminal based on the offset configuration information, comprises: obtaining the PUCCH resource offset information of the target terminal by querying the offset configuration information based on the location of the proprietary information of the target terminal in the Msg.B. ### Claim 13 (depends on 1) An apparatus for hybrid automatic repeat request (HARQ) feedback, performed by a base station, comprising: a processor; a memory configured to store instructions executable by the processor; wherein, the processor is configured to implement the method according to claim 1 by executing the instructions stored in the memory. ### Claim 14 An apparatus for hybrid automatic repeat request (HARQ) feedback, performed by a target terminal, comprising: a processor; a memory configured to store instructions executable by the processor; wherein, the processor is configured to: send a first random access message Msg.A to a base station; receive a second random access message Msg.B returned by the base station, wherein the Msg.B is configured to indicate a HARQ feedback resource of each HARQ feedback terminal in at least one terminal, the Msg.B comprises physical uplink control channel (PUCCH) parameters of respective HARQ feedback terminals, and the HARQ feedback resources of respective HARQ feedback terminals are different; wherein the PUCCH parameters comprise a time parameter k and a PUCCH resource indicator ΔPRI; a time point of sending the HARQ feedback is calculated based on the time parameter k, and a serial number of PUCCH resource for sending the HARQ feedback in a PUCCH resource set is calculated based on the PUCCH resource indicator ΔPRI; and the PUCCH resource set is a candidate PUCCH resource set configured by a high signaling; and send a HARQ feedback to the base station in response to that the target terminal is any one of the respective HARQ feedback terminals.