一种无线传感器网络的簇数目优化方法

针对LEACH算法中无线传感器网络分簇数目的确定问题,提出了一种节点服从泊松分布的情况下最优簇数目的计算方法。该方法利用节点的通信能耗模型,从能耗最小的角度给出了网络的最优簇数目,并证明最优簇数目与监测区域面积、节点数目和泊松分布强度有关,而不是LEACH算法中的固定值,从而为优化网络簇头数提供了一定的依据。仿真表明,在该方法上设计的LEACH算法减少了网络的总能量消耗,有效延长了网络生命周期。

An Optimization Method of Cluster Numbers in Wireless Sensor Networks

According to the determination of cluster numbers of wireless sensor networks in LEACH algorithm,an optimization method to determine cluster numbers in the condition that sensor nodes are under Poisson distribution is proposed in this paper.By the communicating energy consumption model of nodes,it proves that the optimal cluster number is not only related to the area of monitoring region,but also the number of nodes and Poisson intensity.Thus,the fixed value defined in LEACH is lack of rationality.Simulation results have shown that the optimal cluster number deduced by our method can minimize the total energy consumed in each round of network communication and prolong the network lifetime efficiently.