| CPC H04L 1/1893 (2013.01) [H04B 7/0456 (2013.01); H04L 1/1887 (2013.01); H04L 5/0055 (2013.01); H04W 72/20 (2023.01); H04W 4/40 (2018.02)] | 20 Claims |

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1. A feedback information transmission method, comprising:
generating, by a first terminal, a sidelink hybrid auto repeat request ACK (HARQ-ACK codebook based on a time domain position of a resource pool of a sidelink channel and a first time-interval set, wherein the sidelink channel includes a physical sidelink shared channel PSSCH) and a physical sidelink feedback channel (PSFCH); and
sending, by a first terminal, the sidelink HARQ-ACK codebook via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) within a target time unit for sending sidelink HARQ-ACK information corresponding to at least one sidelink data, wherein the sidelink HARQ-ACK codebook includes the sidelink HARQ-ACK information,
wherein the sidelink HARQ-ACK information is configured to indicate a receiving state corresponding to the sidelink data, and the sidelink data is physical layer data sent by the first terminal via a sidelink, and
wherein the method further comprises:
receiving the first time-interval set configured via higher layer signaling, wherein the first time-interval set includes a set of offsets ki between a first time slot where an end symbol of the sidelink channel is located and a second time slot where the sidelink HARQ-ACK codebook is fed back, both i and ki being positive integers.
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