<FONT face=Verdana>This paper investigates a kind of algorithm called splay tree based event region faulttolerant detection algorithm (STERD) for Wireless Sensor Networks (WSNs).Since the algorithm is implemented over a splay tree in a distributed manner

a polynomial regression addressed these problems of event region detection by having a splay tree of sensor nodes.The sink can get attribute values in regions devoid of sensor nodes for attribute values that show smooth spatiotemporal correlation.Theoretical analysis and simulation results indicate that the proposed STERD can attractively obtain the high event region detection accuracy and considerably reduce the false alarm probability even when fault nodes exist.