Method for sending hybrid automatic repeat request acknowledgment information, method for receiving hybrid automatic repeat request acknowledgment information, and communications apparatus

A method, comprising:

• receiving, by a terminal, one or more first physical downlink shared channels (PDSCHs) in a time period from a first network device;
• receiving, by the terminal, one or more second PDSCHs in the time period from a second network device;
• grouping, by the terminal, the one or more first PDSCHs and the one or more second PDSCHs into at least two groups of PDSCHs, based on port groups to which ports of demodulation reference signals (DMRSs) used to demodulate the one or more first PDSCHs and the one or more second PDSCHs belong, identifiers of enabled transport blocks (TBs) carried in the one or more first PDSCHs and the one or more second PDSCHs, or physical downlink control channel (PDCCH) configurations of a plurality of PDCCHs used to schedule the one or more first PDSCHs and the one or more second PDSCHs;
• generating, by the terminal, at least two pieces of HARQ-ACK information for the at least two groups of PDSCHs;
• receiving, by the first network device, one or more pieces of HARQ-ACK information of the at least two pieces of HARQ-ACK information, wherein each piece of HARQ-ACK information of the one or more pieces of HARQ-ACK information comprises an acknowledgment (ACK) or a negative acknowledgment (NACK) fed back for a corresponding one or more physical downlink shared channels (PDSCHs);
• and
• determining, based on the one or more pieces of HARQ-ACK information, information that needs to be retransmitted, and retransmitting the information that needs to be retransmitted.

A communications apparatus, comprising:

• a memory, configured to store a computer program;
• a processor, configured to execute the computer program stored in the memory to perform following steps:
• receiving a first plurality of physical downlink shared channels (PDSCHs) in a time period;
• grouping the first plurality of PDSCHs into at least two groups of PDSCHs, based on port groups to which ports of demodulation reference signals (DMRSs) used to demodulate the first plurality of PDSCHs belong, identifiers of enabled transport blocks (TBs) carried in the first plurality of PDSCHs, or physical downlink control channel (PDCCH) configurations of a plurality of PDCCHs used to schedule the first plurality of PDSCHs;
• generating at least two pieces of HARQ-ACK information, wherein each piece of HARQ-ACK information comprises an acknowledgment (ACK) or a negative acknowledgment (NACK) fed back for one or more PDSCHs in a corresponding group;
• and
• sending the at least two pieces of HARQ-ACK information.

A system, comprising:

• a terminal device;
• a first network device;
• and
• a second network device;
• wherein the terminal device is configured to:
• receive one or more first physical downlink shared channels (PDSCHs) in a time period from the first network device;
• receive one or more second PDSCHs in the time period from the second network device;
• group the one or more first PDSCHs and the one or more second PDSCHs into at least two groups of PDSCHs, based on port groups to which ports of demodulation reference signals (DMRSs) used to demodulate the one or more first PDSCHs and the one or more second PDSCHs belong, identifiers of enabled transport blocks (TBs) carried in the one or more first PDSCHs and the one or more second PDSCHs, or physical downlink control channel (PDCCH) configurations of a plurality of PDCCHs used to schedule the one or more first PDSCHs and the one or more second PDSCHs;
• and
• generate at least two pieces of HARQ-ACK information for the at least two groups of PDSCHs;
• and
• wherein the first network device is configured to:
• receive one or more pieces of HARQ-ACK information of the at least two pieces of HARQ-ACK information, wherein each piece of HARQ-ACK information of the one or more pieces of HARQ-ACK information comprises an acknowledgment (ACK) or a negative acknowledgment (NACK) fed back for a corresponding one or more physical downlink shared channels (PDSCHs).