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For the problem of QoS in the IEEE802.11DCF, proposed an enhanced adaptive scheduling distributed EASDCF mechanism. Through the largest contention window and retry times, this mechanism provides differentiated services and guarantees the real-time service priority access to the channel with higher probability. Besides, it provides a reliable guarantee for the packet drop rate sensitive service. Simulation results indicate that the classification method adopted by the EASDCF has a good effect, enhancing the overall throughput performance of the WLAN and making reasonable use of system resources.
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