Codebook transmission method, apparatus, and system

A method comprising:

• receiving, by a terminal device, at least one first downlink transmission and indication information corresponding to the at least one first downlink transmission, wherein a first time domain resource set comprises at least one of an actual time domain resource on which a first target downlink transmission is located or a reference time domain resource corresponding to the first target downlink transmission;
• receiving, by the terminal device, at least one second downlink transmission and indication information corresponding to the at least one second downlink transmission, wherein a second time domain resource set comprises at least one of an actual time domain resource on which a second target downlink transmission is located or a reference time domain resource corresponding to the second target downlink transmission, wherein the indication information corresponding to the at least one first downlink transmission and the indication information corresponding to the at least one second downlink transmission comprise one of a counter downlink assignment indicator (C-DAI) or a combination of the C-DAI and a total downlink assignment indicator (T-DAI), and wherein the C-DAI corresponds to a corresponding target downlink transmission and a value of the C-DAI indicates an accumulative quantity of a plurality of pairs of frequency domain resources and reference occasions;
• and
• generating, by the terminal device, a codebook that comprises a first sub-codebook and a second sub-codebook,
• wherein the first sub-codebook comprises at least one piece of first feedback information corresponding to the at least one first downlink transmission, and the second sub-codebook comprises at least one piece of second feedback information corresponding to the at least one second downlink transmission, and
• wherein a location of the first feedback information corresponding to the first target downlink transmission in the first sub-codebook corresponds to the indication information corresponding to the first target downlink transmission, and wherein a location of the second feedback information corresponding to the second target downlink transmission in the second sub-codebook corresponds to the indication information corresponding to the second target downlink transmission.

A terminal device comprising:

• at least one processor;
• and
• at least one non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to perform one or more operations comprising:
• receiving at least one downlink transmission and indication information corresponding to the at least one downlink transmission, wherein the at least one downlink transmission comprises a target downlink transmission corresponding to an actual occasion and a pair of a target frequency domain resource and a reference occasion, wherein the reference occasion is obtained after the actual occasion corresponding to the target downlink transmission is offset by an occasion offset value, and wherein the indication information comprises one of a counter downlink assignment indicator (C-DAI) or a combination of the C-DAI and a total downlink assignment indicator (T-DAI), and wherein the C-DAI corresponds to the target downlink transmission and a value of the C-DAI indicates an accumulative quantity of a plurality of pairs of frequency domain resources and reference occasions;
• and
• generating a codebook that comprises at least one piece of feedback information corresponding to the at least one downlink transmission, wherein a location of feedback information corresponding to the target downlink transmission in the codebook corresponds to indication information corresponding to the target downlink transmission,
• wherein the actual occasion comprises one of:
• a physical downlink control channel (PDCCH) monitoring occasion at which downlink control information (DCI) for scheduling or carrying the target downlink transmission is located, or
• a physical downlink shared channel (PDSCH) reception occasion at which the target downlink transmission is located.