摘要
针对DV-Hop(Distance Vector Hop)定位算法对锚节点密度存在依赖性和定位精度有限的问题,做了3个方面的工作:采用虚拟锚节点解决了锚节点密度低的无线传感器网络节点定位问题;通过信号强度的等级判断对跳数进行细分并设置跳数阈值;通过最小二乘法准则矫正了锚节点的平均每跳距离,在此基础上提出VAD-Hop(Virtual Anchor on DV-Hop)算法。仿真实验验证了该算法相对于经典DV-Hop算法提高了定位精度。
The weak points of rang-free DV-Hop localization algorithm were that it depends on the density of anchor nodes and had limited accuracy, to solve this problem, three related works were mentioned. The first one is it solves the node localization problem of wireless sensor networks with low density of anchor node based on virtual anchor node~ The second one is it gets number of hops by the level of signal strength and sets the threshold of hops. The third one is the average hop distance is corrected by least squares criteria. On this basis, VAD-Hop algorithms have been proposed. Simulation results show that the improvement improves the accuracy compared to classic DV-Hop algorithm.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第7期1048-1052,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(60673132)
广东省自然科学基金项目(07117421
8351009001000002)
关键词
无线传感器网络
定位
虚拟锚节点
信号强度
精度
wireless sensor networks
localization
virtual anchor nodes
signal strength
accuracy
