A WSN consists of spatially distributed autonomous energy-constraints sensor nodes. A no. of routing protocols are designed in this context. Clustering is one of the key techniques in wireless sensor network with less energy consumption. LEACH (Low Energy Adaptive Clustering Hierarchy) 29]has been widely proposed in wireless sensor networks. ESEP (Extended Stable Election Protocol)saves better the energy consumption by making it heterogeneous taking 3-energy level nodes called advance, intermediate and normal. The advance node has more energy than intermediate and normal node. The...