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Title:Model-based Bandwidth Estimation in IEEE 802.11 Wireless Networks
Author(s):Yang, Yaling; Wang, Jun; Kravets, Robin
Subject(s):wireless networks
Abstract:Predicting the bandwidth achievable by a new flow is crucial for many bandwidth-aware services. In IEEE 802.11 based networks, the achievable bandwidth of a new flow is not necessarily the same as the free bandwidth on the channel due to the contention-based channel access method. In this paper, we develop a novel analytical model that provides closed-form calculation of bandwidth allocation in all possible operating states of single-hop IEEE 802.11 networks. Using this model, we design an algorithm that accurately predicts the achievable bandwidth of a new flow for single-hop wireless networks, such as wireless LANs, with or without service differentiation. In addition, we extend the bandwidth prediction model to multihop environments. Although the accuracy of the our bandwidth prediction model is degraded in multihop networks, our simulation results show that our algorithm still predicts more accurately than current existing methods.
Issue Date:2005-11
Genre:Technical Report
Other Identifier(s):UIUCDCS-R-2005-2665
Rights Information:You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the University of Illinois at Urbana-Champaign Computer Science Department under terms that include this permission. All other rights are reserved by the author(s).
Date Available in IDEALS:2009-04-20

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