A Comparative Simulation Study of Link Quality Estimators in Wireless Sensor Networks

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Executive Summary

Link Quality Estimation (LQE) in Wireless Sensor Networks (WSNs) is a fundamental building block for an efficient and cross-layer design of higher layer network protocols. Several link quality estimators have been reported in the literature; however, none has been thoroughly evaluated. There is thus a need for a comparative study of these estimators as well as the assessment of their impact on higher layer protocols. In this paper, the authors perform an extensive comparative simulation study of some well-known link quality estimators using TOSSIM. They first analyze the statistical properties of the link quality estimators independently of higher-layer protocols, and then they investigate their impact on the Collection Tree Routing Protocol (CTP).

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