无线传感器LEACH算法的优化及仿真

Simulation Research of Wireless Sensor Networks Based on LEACH Protocol

研究无线传感器网络节能问题。针对传统LEACH簇首选择不合理以及节点能耗不均衡,导致网络生存周期过短的不足,在分析LEACH算法的基础上,提出一种改进的LEACH算法(I_LEACH)。在簇首的选择阶段,把能量因素考虑进去对LEACH算法的阈值计算公式进行改进,防止能量低的节点成为簇首节点;在簇的数据传输阶段,采用多跳和单跳相结合的混合通信方式,改了传统的单一通信方式,更加均衡网络能量能耗,避免了距离基站远的节点过早耗尽能量的难题。最后在Matlab平台上进行仿真。仿真结果表明,与传统LEACH算法相比,I_LEACH算法算法能均衡簇首和节点的能量消耗,有效延长网络的生存周期。

Study about wireless sensor routing algorithms. The energy supply of nodes will be limited strictly in the wireless sensor networks （WSN）. An improved LEACH routing clustering algorithm （I_LEACH） is proposed. In the choice stage, the algorithm of cluster considers the factors of energy, and the threshold LEACH algorithm was im- proved to prevent the nodes become low energy of cluster nodes. In the cluster data transmission stage, and the com- bination communication mode of multi-jump and single-jump was used, which changed the traditional single node energy communication mode, balanced the energy, and avoided the problem that the energy of the node far from base exhausted early. Finally simulation experiment is conducted in Matlab. The simulation results show that, compared with the traditional algorithm, I_LEACH LEACH algorithm can balance the nodes of cluster and energy consumption and prolong the life time of network.