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

Abstract

The present invention provides a device and method for scheduling transmission time interval length, wherein the device for scheduling TTI includes: a processor for acquiring coherence time estimation data, at least one threshold and multiple candidate TTI lengths; establishing coherence time estimation data and at least one A correspondence between the comparison result of the threshold and a plurality of candidate TTI lengths; and comparing the coherence time estimation data with at least one threshold; and a scheduler, configured to establish a correspondence based on the comparison result of the coherence time estimation data and the at least one threshold , schedule TTI lengths to the communication base station from multiple candidate TTI lengths. The invention also provides a communication terminal and a base station. The technical solution provided by the present invention uses a shorter TTI, shortens the delay in receiving periodic and aperiodic CSI reports, obtains better CSI feedback quality, and improves the reliability of data transmission and user-perceived throughput. Longer TTI reduces system overhead and improves throughput that can be effectively utilized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a device and method for scheduling the length of a transmission time interval, a communication terminal and a communication base station. Background technique [0002] The quality of channel state information (Channel State Information, CSI) estimation plays an important role in the reliability and throughput of communication links. In a dynamic environment, that is, when the transmitter and receiver are moving rapidly, the CSI reporting delay is required to be as short as possible. Otherwise, the received CSI estimate cannot accurately describe the current communication channel conditions. Channel coherence time refers to the time period during which channel conditions remain unchanged. Specifically, the faster the transmitter and receiver move, the shorter the coherence time. [0003] At the physical layer, many cellular communication systems schedule data tra...

AI Technical Summary

Problems solved by technology

However, because the signal sent in each TTI needs to include physical layer control information, using a shorter TTI length will result in more system overhead (overhead) in data transmission, for example, in each physical downlink shared channel (Physical In the DownlinkShared Channel (PDSCH) TTI, the physical downlink control channel (Physical Downlink ControlChannel, PDCCH) or the downlink control information (Downlink Control Information, DCI) sent on the enhanced PDCCH is required

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