Downlink hybrid automatic repeat request feedback method based on dynamic frame structure, device and terminal

A terminal, comprising:

• at least one processor;
• and
• a storage device storing a plurality of instructions, which when executed by the processor, causes the at least one processor to:
• determine whether a currently used frame structure in the unlicensed frequency band needs to be reconfigured;
• determine an uplink subframe for implementing a downlink Hybrid Automatic Repeat Request (HARQ) feedback corresponding to each downlink subframe according to the currently used frame structure, when the currently used frame structure does not need to be reconfigured;
• or determine an uplink subframe for implementing the downlink HARQ feedback corresponding to each downlink subframe in a last radio frame before the reconfiguration time point according to a first frame structure used before a reconfiguration time point and a second frame structure to be used, when the currently used frame structure needs to be reconfigured;
• and
• send a HARQ feedback message for the downlink data on the uplink subframe corresponding to the any downlink subframe for implementing the downlink HARQ feedback, when receiving downlink data sent by a base station on any downlink subframe.

A non-transitory storage medium having stored thereon instructions that, when executed by a processor of a terminal, causes the processor of the terminal to perform a downlink Hybrid Automatic Repeat Request (HARQ) feedback method in an unlicensed frequency band based on dynamic frame structure, the downlink HARQ feedback method comprising:

• determining whether a currently used frame structure in the unlicensed frequency band needs to be reconfigured;
• determining an uplink subframe for implementing a downlink HARQ feedback corresponding to each downlink subframe according to the currently used frame structure, when the currently used frame structure does not need to be reconfigured;
• or determining an uplink subframe for implementing the downlink HARQ feedback corresponding to each downlink subframe in a last radio frame before the reconfiguration time point according to a first frame structure used before a reconfiguration time point and a second frame structure to be used, when the currently used frame structure needs to be reconfigured;
• and
• sending a HARQ feedback message for the downlink data on the uplink subframe corresponding to the any downlink subframe for implementing the downlink HARQ feedback, when receiving downlink data sent by a base station on any downlink subframe.