Improved reliable energy efficient data aggregation in WSN

In wireless sensor networks, data aggregation is very important for reducing the quantity of data transmitted and prolonging the lifetime of wireless sensor networks. Data aggregation aims at eliminating redundant data transmission. Power consumption is an important aspect to be considered in the data aggregation which is a scarce resource and they are irreplaceable. In this paper, an improved reliable and energy efficient data aggregation technique in Wireless Sensor Network has been proposed which is based on clustering. Initially we form clusters and a coordinator node (CN) is selected near the cluster in order to monitor the nodes in the cluster. The CN selects a cluster head (CH) in each cluster based upon the energy level and the distance to the CN. The packets sent by the sensor nodes are aggregated at the CH and transmitted to the CN. The CN measures the loss ratio and compares it with a threshold value of loss ratio. Depending upon this value, the forward node count is incremented or decremented and the cluster size is adaptively changed, ensuring reliability and balanced energy consumption.