Embodiments relate to a data transmission method and device. A feedback request is sent by a first device to user equipment that instructs the user equipment to feed back channel indication data to a network device. The channel indication data indicates that a channel is occupied by the first device within a time that corresponds to the channel indication data. The network device includes the first device and one additional device. The first device receives the channel indication data sent by the UE. The first device performs data transmission with the UE using the channel within the time that corresponds to the channel indication data.