Abstract: A wireless transmission method, performed in a second layer of a wireless LAN apparatus, for transmitting data from a first layer of the wireless LAN apparatus to a third layer of the wireless LAN apparatus, comprising steps of: retrieving information related to unacknowledged frames from the first layer; aggregating the unacknowledged frames into a data unit if a processing time of the retrieving and aggregating step is less than a short inter frame space corresponding to a transmission opportunity; and transmitting the data unit to the third layer in the transmission opportunity.

Abstract: A wireless transmission system for transmitting aggregated data units from a first layer to a third layer comprises an apparatus. The apparatus includes a receiver and a processor. The system transmits the aggregated data units from the first layer to the third layer. A wireless transmission method, performed in a second layer for transmitting data from a first layer to a third layer comprises the following steps: retrieving information related to unacknowledged frames from the first layer, aggregating the unacknowledged frames into a predetermined length to the third layer according to the information. The unacknowledged frames form the data.