一种提高多速率WLAN公平性的MAC协议
Improvement on Fairness in Multi-rate WLAN
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摘要: DCF应用在多速率无线局域网中存在严重的不公平性：高速率站点占用信道的时间远小于低速率站点，只获得与低速率站点相同的吞吐量。该文利用区分服务的思想，提出接入时间公平的MDCF。MDCF通过为不同速率的站点设置不同的初始竞争窗口，来实现与发送速率成正比的接入概率，从而保证接入时间的公平性，理论分析和仿真结果都表明MDCF能够较大地提高多速率无线局域网中的时间公平性及吞吐量。Abstract: DCF performs unfairly within multi-rate wireless LAN. Higher rate stations occupy channel for less time, and they can only obtain the same throughput as lower rate stations. This paper presents fair-time-share MDCF, which sets different initial contention windows for stations with different rates. Theoretical analysis and simulation results both show that MDCF can greatly improve the time-fairness and throughput of multi-rate wireless LAN.
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