Data transmission method and apparatus used in wireless local area network

A method for acknowledging transmission of downlink data frames by multiple stations in a wireless local area network, wherein the method comprises:

• sending, by an access point, a corresponding downlink data frame to each station of the multiple stations;
• and
• receiving, by the access point after the access point sends the corresponding downlink data frame to each station, acknowledgment messages concurrently sent by the multiple stations on channel resources allocated by the access point to the multiple stations.

The method according to claim 21, wherein the downlink data frame comprises information used to identify a channel resource allocated to a station corresponding to the downlink data frame.

The method according to claim 22, wherein the information is located in a physical frame convergence procedure header (PLCP Header) of the downlink data frame.

A method for acknowledging transmission of a downlink data frame by a station in a wireless local area network, wherein the method comprises:

• receiving, by the station, a downlink data frame sent by an access point;
• and
• sending, by the station after the station receives the downlink data frame, an acknowledgment message to the access point on a channel resource allocated by the access point to the station.

The method according to claim 24, wherein the downlink data frame comprises information used to identify the channel resource.

The method according to claim 25, wherein the information is located in a physical frame convergence procedure header (PLCP Header) of the downlink data frame.

The access point according to claim 27, wherein the downlink data frame comprises information used to identify a channel resource allocated to a station corresponding to the downlink data frame.

The access point according to claim 28, wherein the information is located in a physical frame convergence procedure header (PLCP Header) of the downlink data frame.

The access point according to claim 27, wherein the access point is one of a laptop computer, a router, a set top box, or a mobile phone.