Analysis of Throughput and Spatial Fairness of IEEE 802.11B DCF with Capture

Z. Hadzi-Velkov and B. Spasenovski (Macedonia)


IEEE 802.11b DCF, capture, near/far effect, Rayleighfading, saturation throughput


In this paper, we examined the influence of the capture effect over the IEEE 802.11b DCF. We compared the capture probabilities and its spatial distribution for two capture models, which include the influence of near/far effect only, and the combined influence of near/far effect and Rayleigh fading, respectively. By using Monte-Carlo simulations and numerical integration, we calculated the frame capture probabilities in function of number of contending stations and capture ratio, and then analytically evaluated network capacity in both access modes: Basic and RTS/CTS “handshake”.

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