基于信标优化的无线传感网络定位算法研究

摘要

Aimed at the problems of traditional wireless sensor network node with low positioning accuracy and much energy con sumption and inflexibility, the localization algorithm based on optimal beacon for wireless sensor networks is presented. The ConDV-Hop localization algorithm use contribution factor to select the optimizing beacon nodes, and the accumulated error is greatly reduced. By using feedback thinking to define correction factors for correcting the initial estimating location, the dependence feature of positioning accuracy on network topology is effectively overcome. The simulation results show that the ConDV-Hop algorithm have good performance in the homogeneous network and heterogeneous network. So it is a practical solution for the node localization in wireless sensor networks.%针对传统无线传感器网络节点定位精度低、能耗大及适应性不强等缺陷,提出了一种基于信标优化的无线传感网络定位算法ConDV-Hop.该算法采用贡献因子对信标节点进行优化选择,使过程累积误差大大减少,利用反馈思想引入修正系数对待定位节点的初始估算位置进行修正,有效地克服了定位精度对网络拓扑的依赖.仿真实验结果表明,ConDVHop算法在均匀网络和非均匀网络中都表现出良好的性能,是无线传感器网络中节点定位的一种实用方案.