Patent ID: 7515574

Claim:
A method for polling of stations in a wireless Local Area Network (WLAN), which comprises the steps of: obtaining Quality of Service (QoS) information related to the stations; assigning two timers to each WLAN service requiring QoS Guarantee, one for uplink transmission and the other for downlink transmission, wherein the timer for uplink transmission is set as Tu=Te+DB−To, where Te is the estimated time when generating a frame, DB is a delay boundary, and To is the time for exchanging the frame order; starting a Controlled Access Period (CAP) when a minimum timer Tm is below a threshold Tthr; exchange message with the station with the minimum timer (based on the need for polling, or downlink and polling); updating the minimum timer after polling message is sent; and quitting CAP and permitting the resources contention for other stations if the minimum timer Tm is larger than the threshold Tthr.