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Abstract
Wireless sensor network (WSN) is a collection of sensors and limited number of mobile data collectors for data gathering in sensors. In such data gathering scheme, mobile data collectors will travel over the sensing area and collects the data from sensor nodes via short-range wireless communications. Polling points are defined for shortening the moving path of mobile collector. The proposed approach defines tour planning of mobile collectors, which will avoid the sensors producing correlated data within a particular cluster containing a polling point. Also to identify a new optimal polling point which overlooks the same efficiently. The correlated sensors are being checked constantly by spatially correlation method. After identifying the correlated sensors, the new polling points are identified and by avoiding the correlated sensors we will get the optimal polling points. By visiting the new polling points, the tour length of mobile collector is reduced and the number of polling points is also minimized, which extends the network lifetime.