Abstract: For the QoS problem of IEEE802.11DCF，an enhanced adaptive scheduling distributed EASDCF mechanism is proposed.This paper provides differentiated services through the largest contention window and retry limit，guarantees the real-time service prior access channel with higher probability，also makes packet drop rate sensitive service to be a reliable guarantee.Simulation results show EASDCF classification strategy has the very good effect.So that the performance of overall throughput in wireless local area network has enhanced，and enables the resources to obtain a more reasonable use.

摘要： 针对IEEE802.11DCF的QoS问题，提出一种增强型自适应调度的分布式EASDCF机制，并通过最大竞争窗口和重传次数进行区分服务，以较高的概率保证了实时业务优先访问信道，并使得丢包率敏感的业务得到可靠保障。仿真结果表明EASDCF所采用的分级策略具有很好的效果，使无线局域网整体的吞吐性能得到提升，使资源得到更加合理的利用。