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| An Adaptive Optimization Scheme for IEEE 802.11 to Improve Throughput and Fairness Performance |
| Mao Jian-bing; Mao Yu-ming; Leng Su-peng |
| National Key Lab of Communication, University of Electronic Science & Technology of China, Chengdu 610054, China |
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Abstract In this paper, an adaptive optimization scheme for IEEE 802.11 DCF is proposed to enhance the throughput and fairness performance. The scheme is based on channel sensing result for network state information and thus it is called CSCC (Channel Sensing Contention Control). The key idea to approach optimal performance dynamically in the new scheme is that the transmission attempt from the DCF is filtered by an adjustable probability P_T. CSCC does not need to perform complex on-line estimation of the number of active stations in the network, and can make adaptive tuning always toward the certain optimization object under various network states. Detailed simulation results show that the scheme can effectively adapt to various networks different in station number and packet size, and consequently achieve performance improvements on several aspects including system throughput, collision probability, delay, delay jitter, fairness and so on.
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Received: 25 August 2008
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2009, Vol. 31 
