A method includes: obtaining, by an access point (AP), use permission of a channel; determining, by the AP after obtaining the use permission of the channel, scheduling information for a station (STA) participating in full-duplex transmission, where the scheduling information includes information about a first station that performs uplink transmission on the channel and information about a second station that performs downlink transmission on the channel at the same time, or the scheduling information includes information about a third station that simultaneously performs uplink and downlink transmission on the channel; and sending, by the AP, a trigger frame, where the trigger frame includes the scheduling information.