The invention provides a communication method, device and
system, which can be applied to an NTN communication scene. The method comprises: sending first indication information to a first terminal device, the first indication information indicating a first parameter, the first parameter being used to configure a first mode, the first mode being a
cell discontinuous reception (DRX) and / or
discontinuous transmission (DTX) mode, the first parameter being a parameter of beam
granularity, the first parameter corresponding to a first beam, and the first terminal device being used to configure a second mode, the first mode being a
cell discontinuous reception (DRX) and / or
discontinuous transmission (DTX) mode; the first beam belongs to at least one beam used for communication in the service
cell; or, the first parameter is a parameter of the regional
granularity, the first parameter corresponds to the first region, and the first region is one of a plurality of
geographic regions covered by the serving cell of the first terminal device. According to the method, the application range and the use mode of the DTX / DRX mechanism are flexibly controlled, for example, different DTX
modes (such as activation duration and period) can be configured for different geographic areas, so that the network equipment can enter a turn-off state (inactive state) and lasts for a period of time, the effect of network
energy conservation is locally realized in a cell, and the network efficiency is improved. The dynamic power distribution effect in the cell is achieved, and the downlink coverage and capacity of the cell are improved.