DATA TRANSMISSION METHOD, DEVICE, TERMINAL AND BASE STATION

摘要

Disclosed are a data transmission method, device, terminal and base station. The method comprises: when downlink data is received after a TAT has timed out, determining whether a first preset parameter of a UE satisfies a first uplink synchronization maintenance condition; when the first parameter of the UE satisfies the first uplink synchronization maintenance condition, sending to a base station the feedback corresponding to the downlink data; when the first parameter of the UE does not satisfy the uplink synchronization maintenance condition, not sending to the base station the feedback corresponding to the downlink data, wherein the feedback is used for identifying whether the downlink data is received correctly; and the first synchronization maintenance condition is used for judging that the UE still maintains an uplink synchronization state after the TAT has timed out. The method, device, terminal and base station can reduce the waste of downlink data transmission resources between a base station and a UE.