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Typical wireless sensor network deployments are expected to be in unattended terrains where link packet error rate may be as high as 70% and path length could be up to tens of hops. In coping with such harsh conditions, the authors introduce a new notion of statistical reliability to achieve a balance between data reliability and energy consumption. Under this new paradigm, the energy efficiency of a comprehensive set of statistically reliable data delivery protocols is analyzed. Based on the insight gained, they propose a hybrid system which combines the energy Efficient and Statistically Reliable Transport (eESRT) protocol with the implicit and explicit ARQ (ieARQ) protocol.
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