Hybrid automatic repeat request feedback indication and feedback method, device, and base station

A method for Hybrid Automatic Repeat reQuest (HARQ) feedback, performed by User Equipment (UE) and comprising:

• obtaining a set of second timing relationships, which is predefined, between time-domain units where downlink data supported by a present system are located and time-domain units for uplink HARQ feedback of the downlink data;
• receiving present downlink data and Downlink Control Information (DCI) carrying uplink HARQ feedback indication information for the present downlink data from a base station, a timing relationship between time-domain units where downlink data are located and time-domain units for uplink HARQ feedback of the downlink data comprising a set of first timing relationships between time-domain units where downlink data for the UE are located and time-domain units for uplink HARQ feedback of the downlink data for the UE and the predefined set of second timing relationships, and the set of first timing relationships being a proper subset of the set of second timing relationships;
• obtaining the uplink HARQ feedback indication information by parsing the DCI;
• acquiring a timing relationship between a time-domain unit where the present downlink data is located and a time-domain unit for uplink HARQ feedback of the present downlink data according to the uplink HARQ feedback indication information and the set of first timing relationships, the timing relationship indicated by the uplink HARQ feedback indication information being comprised in the set of first timing relationships;
• and
• sending uplink HARQ feedback information for the present downlink data according to the acquired timing relationship.

A device for Hybrid Automatic Repeat reQuest (HARQ) feedback, performed by User Equipment (UE) and comprising:

• a processor;
• and
• a memory device configured to store processor-executable instructions,
• wherein the processor is configured to:
• obtain a set of second timing relationships, which is predefined, between time-domain units where downlink data supported by a present system are located and time-domain units for uplink HARQ feedback of the downlink data;
• receive present downlink data and Downlink Control Information (DCI) carrying uplink HARQ feedback indication information for the present downlink data from a base station, a timing relationship between time-domain units where downlink data are located and time-domain units for uplink HARQ feedback of the downlink data comprising a set of first timing relationships between time-domain units where downlink data for the UE are located and time-domain units for uplink HARQ feedback of the downlink data for the UE and the predefined set of second timing relationships, and the set of first timing relationships being a proper subset of the set of second timing relationships;
• obtain the uplink HARQ feedback indication information by parsing the DCI received by the processor;
• acquire a timing relationship between a time-domain unit where the present downlink data is located and a time-domain unit for uplink HARQ feedback of the present downlink data according to the uplink HARQ feedback indication information obtained by the processor and the set of first timing relationships, the timing relationship indicated by the uplink HARQ feedback indication information being comprised in the set of first timing relationships;
• and
• send uplink HARQ feedback information for the present downlink data according to the timing relationship acquired by the processor.