Mobility

Resilient Event Detection in Wireless Sensor Networks

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Executive Summary

As wireless sensor networks become widely used, the need to provide fault tolerant, user-friendly middleware for detecting sensed events increases. Their contribution is the motivation, design, implementation and evaluation of ResTAG, which provides fault-tolerant aggregate queries in the popular, user-friendly TinyDB middleware. If a sensor becomes mis-calibrated or physically compromised, the fault-tolerant queries use the network redundancy to reduce the confidence in any report from that sensor. Queries implemented using ResTAG detect faulty nodes within a predictable threshold that depends on both the percentage and failure type of faulty nodes.

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