In another optional manner, the association acknowledgement information further includes a statistical identifier, and the statistical identifier indicates a quantity of second STAs to which the AP sends acknowledgement requests by using a same piece of association acknowledgement information. The statistical identifier is located after per traffic identifier information in the association acknowledgement information. Alternatively, the statistical identifier occupies a bit reserved in block acknowledgement starting sequence control in the association acknowledgement information.
Persons of ordinary skill in the art may understand that all or some of the steps of the method embodiments may be implemented by a program instructing relevant hardware. The program may be stored in a computer-readable storage medium. When the program runs, the steps of the method embodiments are performed. The foregoing storage medium includes: any medium that can store program code, such as a ROM, a RAM, a magnetic disk, or an optical disc.
Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of the present invention, but not for limiting the present invention. Although the present invention is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some or all technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present invention.