Life Time Enhancement of Wireless Sensor Network by Modified Threshold of LEACH Protocol

Due to the low power storing capability, extending the life span of microsensors in wireless sensor networks (WSN) is a difficult task. To maximize the lifespan of microsensors by reducing the dissipation of energy, Low Energy Adaptive Clustering Hierarchy (LEACH) protocol is utilized. In this study, the LEACH protocol's threshold selection is modified in order to identify the best cluster head to extend the lifetime of WSN. The authors looked at two modified LEACH protocols (mLEACH1 and mLEACH2) to minimize energy consumption, as well as to improve the sensor nodes' lifespan. Furthermore, the performance of these two modified LEACH protocols is evaluated by comparing them to the conventional LEACH protocol with respect to number of dead nodes and amount of energy left in the network. According to the analysis of FND (first node dead) and HNA (half node alive) performances, the mLEACH1 can improve the sensor network's lifetime by 4.24% to 8.67% compared to traditional LEACH. Moreover, by lowering sensor nodes' death rate and maintaining the WSN's energy dissipation rate lower for a longer period of time, mLEACH2 can extend the network's lifespan by 253.73% and 331.5% for FND and HNA, respectively, when compared to standard LEACH.