DOWNLINK DATA COLLISION AVOIDANCE METHOD, ACCESS POINT AND STATION

摘要

The present invention provides a downlink data collision avoidance method, Access Point (AP) and Station (STA). The method comprises: an AP receives a radio frame transmitted by an STA and used for inquiring whether the AP has a Bufferable Unit (BU) of the STA; after determining that there is the BU of the STA and that the BU is larger than a predetermined threshold, the AP exchanges radio frames with the STA to reserve the channel; after succeeding in reserving the channel, the AP sends the BU to the STA. The transmission method for downlink data collision avoidance can guarantee the fairness among each STAs and the reasonable utilization of channel resources, thus avoiding the collision; furthermore, the channel reservation frame transmitted by the AP can reserve a longer period of time, i.e. a plurality of BUs can be transmitted to the STA at a time, thus saving the link overhead.