传感器网络中一种能量有效的簇头选择机制

Energy efficient cluster-heads selection for wireless sensor networks

针对LEACH算法存在簇头节点个数和位置分布不稳定的现象,在簇头节点的选择过程中,充分考虑簇头节点的残余能量因素,通过设定簇头的能量阈值防止低能量的节点成为簇头。改进的算法解决了LEACH簇头选择算法存在的簇头节点可能能量不足的问题,从而达到均衡网络能量消耗,延长网络寿命的目的。仿真实验采用改进算法的网络与采用LEACH、DCHS以及LEACH-H算法的网络的比较结果,说明改进算法具有更好的收敛性,实验数据表明该算法能最大限度地均衡利用网络的能量,延长无线传感器网络的寿命。

In LEACH, the number and the locations of cluster-heads are both unstable.The improved algorithm takes remaining energy into consideration, and designs energy threshold of cluster-head during the phase of cluster-heads selection to prevent that the nodes with lower energy become cluster-heads.This phase solves the problem that the cluster-head has low power, and attains the load equilib- rium and fin＇ther lengthens the network lifetime.Compared with LEACH, DCHS and LEACH-H algorithm, the simulation results show that the new algorithm has better convergence.And it is more efficient to save energy of consumption and prolong the living time of the whole network.