Fault Detection Mechanism for Wireless Sensor Networks
Due to the low cost and the possible harsh or hostile deployment environments, sensors are prone to failure. Faulty sensors are likely to report arbitrary readings that do not reflect the true state of observed physical process. These faulty sensors should be recognized timely, and should be excluded from the data collection process to ensure the overall data quality. In this paper an Ad hoc On Demand Distance Vector (AODV) routing algorithm is used to create wireless sensor network. The proposed fault detection algorithm is based on the spatio-temporal correlations among the sensor measurement series in WSNs. Each sensor node identifies its own state based on similarity test and the dissemination of the node state.