Method for sending uplink multi-user transmission triggering frame, access point, and station

Embodiments of the present invention provide a method for sending an uplink multi-user transmission triggering frame, an access point, and a station. An access point sends, to a station, a beacon frame carrying a triggering frame information unit, wherein the triggering frame information unit comprises sending information of a triggering frame; the station acquires a target transmission time sequence of the triggering frame according to the sending information; when the target transmission time of the triggering frame arrives, the access point contends for a channel; and after the access point successfully contends for the channel, the access point sends the triggering frame to the station, wherein the state of the station is switched to an active state at this time. A triggering frame is received through a monitoring channel, and after a station receives the triggering frame, the station performs uplink transmission according to an instruction of the triggering frame. In a case in which signaling overheads are not increased and the stability is ensured, the station can acquire the sending time of the triggering frame, so that the station maintains a reception state in a proper time.