Abstract: In order to solve the fairness problem in 802.11e networks, a method called DTAF(Dynamic TXOP Allocation for Fairness) is proposed, which utilizes the collision times to estimate contention degree before transmission, turns TXOP, and at the same time, solves the unfairness problem in the networks employing the multi-rate scheme. Theoretic analysis and simulaiton results show that DTAF has better performance in retransmission times, packets average transmission delay and fairness among stations employing varying data rates.

Key words: Enhanced Distributed Channel Access(EDCA), multi-rate, fairness

摘要： 为解决802.11e网络的公平性问题，提出一种TXOP动态分配方法，在节点传输前，根据碰撞次数估计碰撞程度，根据估计得到的网络负载情况调整节点的TXOP，使不同优先级、不同传输速率的业务获得相应的TXOP值。理论分析和仿真结果表明，该方法在采用不同发送速率的业务间，能保证吞吐量的公平性，并减少分组重传次数，降低分组传输平均时延。

关键词: 增强型分布式信道接入, 多速率, 公平性

CLC Number: 

• TN915