Achieving energy efficiency and increasing network life in wireless sensor network

Wireless sensor network consists of large number of nodes deployed randomly or deterministically in the area of interest to sense the event. One of the main constraint of WSN is the limitation of battery power. To increase the life of WSN, efficient utilization of power is required. Various clustering algorithm have been proposed in the literature to increase the lifetime of the WSN. In all algorithms, data processing is done at the Cluster Head(CH) which consume large amount of energy because energy consumption depends upon the length of the packet which is to be transmitted and the distance between nodes to CHs and CH to BS. The proposed method reduces the length of the packet by processing the data at the node itself using Delta Modulation. In the proposed method present data value is compared with the previous data value, and if present data value is greater than the previous data value, output is `1' otherwise output is `0.' It reduces the size of packet and hence the energy consumption. The algorithm is implemented for even size clustering and for unequal size clustering.