Feedback information sending method, user equipment, and base station

A feedback information sending method, comprising:

• receiving, by user equipment, scheduling information from a base station on a downlink control channel, wherein the downlink control channel is in a downlink subframe which belongs to a preconfigured downlink subframe set, and the scheduling information is used for scheduling downlink data;
• determining, by the user equipment, an uplink subframe for sending feedback information corresponding to the downlink data, wherein the preconfigured downlink subframe set is a set of downlink subframes that are associated with the uplink subframe and that are of all carriers configured for the user equipment by the base station;
• determining, by the user equipment, a codebook of the feedback information according to a downlink assignment index (DAI) accumulation indication, wherein the DAI accumulation indication is located in each piece of scheduling information of a scheduled downlink subframe subset, a value of the DAI accumulation indication is obtained by performing accumulative counting in the scheduled downlink subframe set according to an order that is first in ascending order of a carrier index and then in ascending order of a subframe index the codebook corresponds to the scheduled downlink subframe subset, and the scheduled downlink subframe subset belongs to the preconfigured downlink subframe set;
• determining, by the user equipment, a physical uplink control channel (PUCCH) resource according to PUCCH resource indication information;
• and
• sending, by the user equipment on the PUCCH resource in the uplink subframe, encoded feedback information.

An apparatus, wherein the apparatus is a chip used in a base station or the apparatus is a base station, the apparatus comprises:

• one or more processors, and
• a storage medium configure to store program instructions;
• wherein, when executed by the one or more processors, the instructions cause the apparatus to perform operations that comprise:
• sending scheduling information to user equipment (UE) on a downlink control channel, wherein the downlink control channel is in a downlink subframe which belongs to a preconfigured downlink subframe set, and the scheduling information is used for scheduling downlink data;
• and
• determining an uplink subframe for receiving feedback information corresponding to the downlink data, wherein the preconfigured downlink subframe set is a set of downlink subframes that are associated with the uplink subframe and that are of all carriers configured for the user equipment by the base station;
• determining a PUCCH resource;
• and
• receiving, on the PUCCH resource in the uplink subframe, encoded feedback information from the UE;
• wherein the scheduling information comprises a downlink assignment index (DAI) accumulation indication, the DAI accumulation indication is located in each piece of scheduling information of a scheduled downlink subframe subset, a value of the DAI accumulation indication is obtained by performing accumulative counting in the scheduled downlink subframe set according to an order that is first in ascending order of a carrier index and then in ascending order of a subframe index, the feedback information corresponds to the scheduled downlink subframe subset, and the scheduled downlink subframe subset belongs to the preconfigured downlink subframe set.