Binary Information Press
In this paper, the authors investigate the use of wireless sensor networks for event localization. By introducing the idea of trust Index, they improve the SNAP (Subtract on Negative Add on Positive) localization algorithm and propose the TIM-SNAP (Trust Index Model based Subtract on Negative Add on Positive) localization algorithm with higher localization accuracy and better performance of fault tolerance. In TIM-SNAP algorithm, each node is assigned a parameter called trust index. When an event occurs, sink node makes a decision on whether each node reports a correct event or not, according to the node's positions and report.