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Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
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Proceedings of the 10th annual international conference on Mobile computing and networking
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Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
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ExOR: opportunistic multi-hop routing for wireless networks
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
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CoNEXT '06 Proceedings of the 2006 ACM CoNEXT conference
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IEEE Journal on Selected Areas in Communications
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IEEE Journal on Selected Areas in Communications
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Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems
Self-reconfigurable wireless mesh networks
IEEE/ACM Transactions on Networking (TON)
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This paper presents a highly efficient and accurate link-quality measurement framework, called Efficient and Accurate link-quality monitoR (EAR), for multihop wireless mesh networks (WMNs) that has several salient features. First, it exploits three complementary measurement schemes: passive, cooperative, and active monitoring. By adopting one of these schemes dynamically and adaptively, EAR maximizes the measurement accuracy, and its opportunistic use of the unicast application traffic present in the network minimizes the measurement overhead. Second, EAR effectively identifies the existence of wireless link asymmetry by measuring the quality of each link in both directions of the link, thus improving the utilization of network capacity by up to 114%. Finally, its cross-layer architecture across both the network layer and the IEEE 802.11-based device driver makes EAR easily deployable in existing multihop wireless mesh networks without system recompilation or MAC firmware modification. EAR has been evaluated extensively via both ns-2-based simulation and experimentation on our Linux-based implementation in a real-life testbed. Both simulation and experimentation results have shown EAR to provide highly accurate link-quality measurements with minimum overhead.