COMPARATIVE ANALYSIS OF LEACH AND PEGASIS-ENERGY EFFICIENT ROUTING ALGORITHM FOR WIRELESS SENSOR NETWORKS

Wireless sensor networks consisting of sensor nodes can be deployed for collecting of valuable information from field. They can be used for large number of military operations to gather information from the battlefield or to convey the message to other nodes. Gathering sensed information in an energy efficient manner is critical to operate the sensor network for a long period of time. In this paper, we look at communication protocols, which can have significant impact on the overall energy dissipation of these networks. It is a challenging aim to design an energy efficient routing protocol, which can minimize the energy and thereby extend the lifetime of the network. In this paper we compare the conventional LEACH algorithm with an improvised algorithm, PEGASIS(Power Efficient Gathering In Sensor Systems). Our simulations show that PEGASIS performs better than LEACH by about 100 to 300% when 1%, 20%, 50%, and 100% of nodes die for different network sizes and topologies. PEGASIS shows an even further improvement as the size of the network increases.