Air interface interception method, device and system based on LBT, and medium

The embodiment of the invention relates to an air interface interception method, device and system based on an LBT, and a medium. The method comprises the steps: switching a working mode of a distributed base station system into an FDD mode during air interface interception, configuring all subframes in an FDD frame structure to work at an uplink moment, and intercepting an uplink interference signal on all subframes of the FDD frame structure, and when the intensity of the uplink interference signal is not greater than a preset threshold, switching the working mode of the distributed base station system to a TDD mode, so that the distributed base station system provides business service in the TDD mode. According to the embodiment of the invention, the method can meet the demands of the distributed base station system for the LBT function, and also can guarantee the normal business service of the distributed base station system. 本公开实施例涉及一种基于LBT的空口侦听方法、装置、系统及介质，通过在进行空口侦听时，将分布式基站系统的工作模式切换为FDD模式，并将FDD帧结构中的所有子帧全