Device and method for scheduling transmission time interval length, communication terminal and base station

The invention provides a device and method for scheduling a transmission time interval length. The device for scheduling the TTI length comprises a processor for acquiring coherent time estimation data, at least one threshold value and multiple candidate TTI lengths, establishing a corresponding relation between a comparison result of the coherent time estimation data and the at least one threshold value and the multiple TTI lengths, and comparing the coherent time estimation data with the at least one threshold value; and a scheduler for scheduling the TTI length to a communication base station from the multiple candidate TTI lengths according to the comparison result of the coherent time estimation data and the at least one threshold value and the established corresponding relation. The invention further provides a communication terminal and a base station. By use of the technical scheme provided by the invention, the received periodic or non-periodic CSI report delay is shortened to obtain better CSI feedb