CHANNEL DETECTION METHOD, CHANNEL DETECTION SYSTEM, TERMINAL AND BASE STATION

摘要

The present invention provides a channel detection method applied when an LTE system works in an unlicensed frequency band, a channel detection system applied when the LTE system works in the unlicensed frequency band, a terminal and a base station. The channel detection method applied when the LTE system works in the unlicensed frequency band comprises: when a data service arrives, determining a current subframe, and setting channel detection time in the current subframe and/or a backward adjacent subframe to perform channel state detection; and when the channel state is an idle state, performing data service transmission. By means of the technical solution of the present invention, on the premise that normal working of the LTE system in the unlicensed frequency band is guaranteed, data service transmission delay caused by channel detection at a fixed detection period can be effectively reduced, the data service transmission efficiency is improved, and peaceful coexistence of the LTE system and other systems in the unlicensed frequency band is also realized.