HIERARCHICAL COST EFFECTIVE LEACH FOR HETEROGENEOUS WIRELESS SENSOR NETWORKS

Wireless sensor networks are those that are used for the communication between various sensor nodes to the base station. Heterogeneity in such networks is used to manage the network deployment cost and the network traffic. A hierarchical cost effective LEACH (HCEL) protocol is proposed to enhance energy efficiency of the sensor nodes thereby maximizing the network performance without increasing the network deployment cost. In this paper, heterogeneous networks that comprise three types of sensor nodes are considered. A hierarchical network structure is formed where the data are forwarded by using "aggregators". The clustering is done inorder to maximize the energy efficiency of the sensor nodes. The cost comparision is done between various protocols like separate LEACH(SL), proposedLEACH(PL), separate proposed(SP) and HCEL. The energy efficiency is derived by initiating the activity window interference. Simulation results show that the HCEL protocol derive a gradual decrease in the network deployment cost ratio in terms of powerful nodes and energy factor.