| 摘要: |
| 在无线Ad-hoc网络和无线传感器网络中,定位是一个广受关注的重要问题.设计了一个系统,该系统将测量得到的距离信息抽象成为两节点间弹簧的长度,将节点坐标距离与测距距离差抽象成为节点间的力,通过受力分析产生位移向量多次更新节点坐标并最终得出节点的位置.系统使用简单的计算就能得到一个位移向量,然后使用该向量更新坐标.证明了该系统比其他基于力的思想的定位方法收敛更快.系统在测距精度不高的情况下也能得到比无需测距的方法更好的定位效果. |
| 关键词: ad-hoc 无线传感器网络 弹力 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(60825205,60903179,61073152,61021062) |
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| Node Localization in Wireless Ad-Hoc Networks Using Elastic Force |
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GUAN Lu-Bin1,2, WU Xiao-Bing1,2, CHEN Gui-Hai1,2
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1.Department of Computer Science and Technology, Nanjing University, Nanjing 210093, China;2.State Key Laboratory for Novel Software Technology(Nanjing University), Nanjing 210093, China
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| Abstract: |
| In wireless ad-hoc and sensor networks,localization is often viewed as one of the most significant problems.This study has designed a localization system that abstracts the distance of every neighbor nodes pair as the length of a spring between them and then attains the final position information through spring updating. Compared with other spring-based localization methods,this system converges faster because it uses a displacement vector that has proven to be more efficient in updating coordinates.The system performs better than range-free localization methods even under high ranging error. |
| Key words: ad-hoc WSNs elastic force |
