HARQ-ack codebook feedback method and terminal device

A Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) codebook feedback method, comprising:

• transmitting, by a second terminal device, a first Sidelink Control Information (SCI) format to a first terminal device, the first SCI format being used to receive a first Physical Sidelink Shared Channel (PSSCH), and the first SCI format comprising first indication information, first identification (ID) indication information corresponding to the first terminal device, and second ID indication information corresponding to the second terminal device;
• and
• receiving, by the second terminal device, a first HARQ-ACK codebook transmitted by the first terminal device, the first HARQ-ACK codebook being generated by the first terminal device based on the first ID indication information and/or the second ID indication information, and the first indication information, the first HARQ-ACK codebook comprising a first feedback bit containing feedback information corresponding to the first PSSCH;
• wherein the first indication information indicates a position in sequence of the first SCI format among transmitted first SCI formats, or the first indication information indicates a position in sequence of the first PSSCH among PSSCHs scheduled by the transmitted first SCI formats;
• wherein the first ID indication information indicates a part of information in an ID of the first terminal device, or the first ID indication information indicates the ID of the first terminal device;
• and the second ID indication information indicates a part of information in an ID of the second terminal device, or the second ID indication information indicates the ID of the second terminal device.

A terminal device, comprising a processor and a memory, wherein the memory has a computer program stored thereon, and the processor is configured to invoke and execute the computer program stored in the memory to:

• receive a first Sidelink Control Information (SCI) format transmitted by a second terminal device, the first SCI format being used to receive a first Physical Sidelink Shared Channel (PSSCH), and the first SCI format comprising first indication information, first identification (ID) indication information corresponding to the first terminal device, and second ID indication information corresponding to the second terminal device;
• and
• generate a first HARQ-ACK codebook based on the first ID indication information and/or the second ID indication information, and the first indication information, the first HARQ-ACK codebook comprising a first feedback bit containing feedback information corresponding to the first PSSCH;
• wherein the first indication information indicates a position in sequence of the first SCI format among transmitted first SCI formats, or the first indication information indicates a position in sequence of the first PSSCH among PSSCHs scheduled by the transmitted first SCI formats;
• wherein the first ID indication information indicates a part of information in an ID of the first terminal device, or the first ID indication information indicates the ID of the first terminal device;
• and the second ID indication information indicates a part of information in an ID of the second terminal device, or the second ID indication information indicates the ID of the second terminal device.