Distributed Channel-Adaptive Fair Allocation for IEEE 802.11e WLAN

Yow-Yiong Edwin Tan, Stephen McLaughlin, David I. Laurenson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Distributed Channel-Adaptive Fair Allocation (DCAFA) is proposed to extend the IEEE 802.11e Enhanced Distributed Coordination Function (EDCF), by halving the contention window (CW) after zeta consecutive successful transmissions to reduce the collision probability when channel is busy. The scheme computes an adaptive threshold function for each priority queue by taking into account the channel load. Simulation results show that DCAFA outperforms EDCF in-terms of global throughput, throughput of traffic class, frame discard probability and average delay in medium and high load cases. They also show that the proposed analytical model is accurate and achieves a high degree of fairness among applications of same priority level.

Original languageEnglish
Title of host publication2006 IEEE 63rd Vehicular Technology Conference, Vols 1-6
Place of PublicationNew York
Number of pages5
ISBN (Print)978-0-7803-9391-2
Publication statusPublished - 2006
Event63rd IEEE Vehicular Technology Conference - Melbourne, Australia
Duration: 7 May 200610 May 2006


Conference63rd IEEE Vehicular Technology Conference
Abbreviated titleVTC 2006-Spring


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