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Admission Control (AC) is an effective mechanism for providing bandwidth assurance in wireless mesh networks. Early AC schemes over multi-rate WMNs typically use a prechosen rate or a MAC-layer adapted rate for each link, denying data sessions that could have been admitted should a better multi-rate AC be available. Taking full advantage of multi-rate WMNs, the authors present a Rate-adaptive Admission Control protocol (RaAC) for IEEE 802.11-based WMNs. RaAC consists of three major components: a rate adaption algorithm to meet the bandwidth requirement of the data session and satisfy the channel condition of the PHY layer.
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