Methods for sending and receiving feedback information, user equipment, and access network device

A method for receiving feedback information, comprising:

• sending, by an access network device, downlink data to user equipment (UE) by using a downlink shared channel;
• sending a downlink assignment index (DAI) index indicator and a DAI total quantity indicator to the UE by using a downlink control channel scheduled in a downlink subframe in a real-time scheduling downlink subframe subset, wherein the DAI index indicator and the DAI total quantity indicator indicate a codebook of feedback information, the real-time scheduling downlink subframe subset is a set that consists of downlink subframes actually scheduled by the access network device, the codebook of the feedback information corresponds to al downlink subframes in the real-time scheduling downlink subframe subset;
• and
• receiving, by the access network device in an uplink subframe, the feedback information that is sent by the UE, wherein the feedback information is channel coded based on the codebook;
• wherein the value of a DAI index indicator corresponding to each downlink subframe in the real-time scheduling downlink subframe subset is:
• a count value obtained by performing an accumulative count on the subframes in the real-time scheduling downlink subframe subset in a preset order;
• and in the real-time scheduling downlink subframe subset, the value of a DAI total quantity indicator of each downlink subframe in a first order combination corresponding to a current subframe sequence number is:
• a sum of a current quantity and a historical quantity, wherein the current quantity is a total quantity of downlink shared channels scheduled in the downlink subframes in the first order combination corresponding to the current subframe sequence number, and the historical quantity is a total quantity of downlink shared channels scheduled in each downlink subframe in the first order combinations corresponding to subframe sequence numbers of all downlink subframes before a subframe moment of the current subframe sequence number in the real-time scheduling downlink subframe subset.

An apparatus, comprises:

• a transceiver, configured to receive, in a downlink subframe in a preconfigured downlink subframe set, downlink data that is sent by an access network device by using a downlink shared channel, and a downlink assignment index (DAI) index indicator and a DAI total quantity indicator that are sent by the access network device by using a downlink control channel;
• a processor communicatively coupled with the transceiver, wherein the processor is configured to:
• determine an uplink subframe for sending feedback information corresponding to the downlink shared channel, wherein the preconfigured downlink subframe set is a set that is associated with the uplink subframe and that consists of all downlink subframes of carriers preconfigured for User Equipment (UE);
• determine a codebook of the feedback information according to the DAI index indicator and the DAI total quantity indicator, wherein the codebook corresponds to all downlink subframes in a real-time scheduling downlink subframe subset, the real-time scheduling downlink subframe subset is a set that consists of downlink subframes actually scheduled by the access network device, and the real-time scheduling downlink subframe subset is a subset of the preconfigured downlink subframe set;
• and
• perform channel coding on the feedback information according to the codebook;
• and
• wherein the transceiver is further configured to send, in the uplink subframe, the channel coded feedback information to the access network device;
• wherein the value of a DAI index indicator corresponding to each downlink subframe in the real-time scheduling downlink subframe subset is:
• a count value obtained by performing an accumulative count on the subframes in the real-time scheduling downlink subframe subset in a preset order;
• and in the real-time scheduling downlink subframe subset, the value of a DAI total quantity indicator of each downlink subframe in a first order combination corresponding to a current subframe sequence number is:
• a sum of a current quantity and a historical quantity, wherein the current quantity is a total quantity of downlink shared channels scheduled in the downlink subframes in the first order combination corresponding to the current subframe sequence number, and the historical quantity is a total quantity of downlink shared channels scheduled in each downlink subframe in the first order combinations corresponding to subframe sequence numbers of all downlink subframes before a subframe moment of the current subframe sequence number in the real-time scheduling downlink subframe subset.

An apparatus, comprises:

• a processor configured to:
• determine a downlink assignment index (DAI) index indicator and a DAI total quantity indicator for a UE, wherein UE the DAI index indicator and the DAI total quantity indicator indicate a codebook of feedback information;
• and
• a transceiver communicatively coupled with the processor, wherein the transceiver is configured to:
• send downlink data to user equipment (UE) by using a downlink shared channel;
• send the downlink assignment index (DAI) index indicator and the DAI total quantity indicator to the UE by using a downlink control channel scheduled in a downlink subframe in a real-time scheduling downlink subframe subset, wherein the real-time scheduling downlink subframe subset is a set that consists of downlink subframes actually scheduled by a access network device, the codebook of the feedback information corresponds to all downlink subframes in the real-time scheduling downlink subframe subset;
• and
• receive, in an uplink subframe, the feedback information that is sent by the UE, wherein the feedback information is channel coded based on the codebook;
• wherein the value of a DAI index indicator corresponding to each downlink subframe in the real-time scheduling downlink subframe subset is:
• a count value obtained by performing an accumulative count on the subframes in the real-time scheduling downlink subframe subset in a preset order;
• and in the real-time scheduling downlink subframe subset, the value of a DAI total quantity indicator of each downlink subframe in a first order combination corresponding to a current subframe sequence number is:
• a sum of a current quantity and a historical quantity, wherein the current quantity is a total quantity of downlink shared channels scheduled in the downlink subframes in the first order combination corresponding to the current subframe sequence number, and the historical quantity is a total quantity of downlink shared channels scheduled in each downlink subframe in the first order combinations corresponding to subframe sequence numbers of all downlink subframes before a subframe moment of the current subframe sequence number in the real-time scheduling downlink subframe subset.