Space-Time Correlation Based Fault Correction of Wireless Sensor Networks

The nodes within wireless sensor network (WSN) have low reliability, and are easy to act abnormally and produce erroneous data. To address the problem, we propose a distributed fault correction algorithm, which makes use of correlation among data of adjacent nodes and the correlation between current data and historical data on a single node. The algorithm could correct measurement errors every time nodes take measures. Simulation results show that the algorithm could help correct lots of errors, and only introduce very few errors, while still keep effective for nodes near event region border where many existed algorithms failed.