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Abstract
In wireless sensor networks (WSNs), due to the limitation of nodes' energy, energy efficiency is an important factor should be considered when the protocols are designing. As a typical representative of hierarchical routing protocols, LEACH Protocol plays an important role. In response to the uneven energy distribution that is caused by the randomness of cluster heads forming , this paper proposes a new improved algorithm of LEACH protocol (LEACH-LLCH) which is intended to balance the energy consumption of the entire network and extend the life of the network . The new algorithm is emulated by Matlab simulation platform, the simulation results indicate that both energy efficiency and the lifetime of the network are better than that of LEACH Protocol.
Keywords: LEACH Protocol; Energy consumption; Network lifetime; Matlab simulation.
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1. Introduction
As a new information acquisition and processing technology, wireless sensor network (WSN) has a wide range of applications in military, environmental monitoring, smart furniture and space exploration and so on [1], Wireless Sensor Network can be described as an autonomy system consisting of lots of sensor nodes designed to intercommunicate by wireless radio , and it can collaborate in real time monitoring, perceiving and collecting information of various environmental or monitoring objects and transfer this information to the base station. It does not need a fixed network support, and it has rapid employment, survivability and other characteristics, so it has a good application prospect.
Until now the research on sensor network generally has gone through two stages, the first stage is primarily intended for node, the second one is for network-level issues, the main research works in this stage involve the network layer and MAC layer protocol based on energy optimization, node localization technology, clock synchronization technology and data fusion technology [2], Study of routing protocols in wireless sensor networks is one of the hot topics at this stage.
LEACH Protocol is the first protocol of hierarchical routings which proposed data fusion, it is of milestone significance in clustering routing protocols. Many hierarchical routing protocols are improved ones based on LEACH protocol [3], So, when wireless sensor networks gradually go into our lives, it is of great significance to research on LEACH protocol.
2. Brief Introduction to LEACH...