Lifetime prolonging in LEACH protocol for wireless sensor networks

The expeditious transformation of hardware technology has empowered the reinforcement of small, inexpensive, static and dynamic powerful sensor nodes, which are capable of sensing, computation and wireless communication on wide range of frequency with various modulation technique. This revolutionizes the implementation of wireless sensor network for considerable dimensions like overseeing some geographic area and parameter collection task. However, a limited energy constraint presents a major challenge such vision to become reality. In this paper we have attempted to explain how the wireless sensor networks are formed and how the various nodes present in those networks act as interdependent communicating nodes. LEACH (Low Energy Adaptive Clustering Hierarchy) [2] is one of the popular cluster-based structures, which has been widely proposed in wireless sensor networks. We are proposing the iLeach protocol (Improved Low-Energy Adaptive Clustering Hierarchy) and comparing to LEACH protocol. Lifetime of sensors is evaluated in terms of FND (First Node Dies) and HND (Half of the Nodes Die) [11] which will take care for the reliability and power efficiency of a wireless sensor network.