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Theoretic Analysis of IEEE 802.11 Rate Adaptation Algorithm SampleRate

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4 Author(s)
Jianhua He ; Coll. of Eng., Swansea Univ., Swansea, UK ; Wenyang Guan ; Lin Bai ; Kai Chen

In this paper we investigate rate adaptation algorithm SampleRate, which spends a fixed time on bit-rates other than the currently measured best bit-rate. A simple but effective analytic model is proposed to study the steady-state behavior of the algorithm. Impacts of link condition, channel congestion and multi-rate retry on the algorithm performance are modeled. Simulations validate the model. It is also observed there is still a large performance gap between SampleRate and optimal scheme in case of high frame collision probability.

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Communications Letters, IEEE  (Volume:15 ,  Issue: 5 )