摘要
现有的无线传感器网络定位技术消耗了大量的计算和处理资源,并且受到了环境因素以及对手攻击等干扰,在受限空间中定位精度较低,无法满足定位需求。为了提高受限空间中的定位精度,提出了一种基于梯度的安全定位算法,算法在双曲线定位模型基础上,引入梯度的概念,降低了算法的计算复杂度,使算法能够适应受限空间的环境要求,实现高效高精度的定位;为了提高算法的安全性,增加了对不一致性测量的选择性剪枝过程,增强了算法对恶意攻击的抵抗能力。最后,以室内走廊为实验环境进行了仿真验证,通过主频计时策略,提高了算法的定位精度。分析结果表明,在室内受限空间中,提出的算法在定位精度、能量消耗和抗干扰能力上优于现有算法。
Existing wireless sensor network location technology can not satisfy the location demands, not only because it calls for a lot of calculation time and processing resources but also for it is interfered by environmental factors, attacks from other users and its positional accuracy is low. Therefore, in order to improve location accuracy in constrained space, a gradient-based security location algorithm was proposed in this paper, in which gradient is brought based on hy- perbolic location model. This algorithm lowers the computational complexity so that it can satisfy the environmental de- mands of constrained space and achieve the high-accuracy localization. Meanwhile, to improve the security of the algo- rithm, the resistant ability was enhanced and the selective pruning process for inconsistency measuring was also adop- ted. We finally improved the location accuracy by using main frequency strategy according to the simulation results of indoor corridor experiments. And the results show that the proposed algorithm has higher performances not only on lo- calization accuracy and energy consumption but also on anti-interference ability than the existing one.
出处
《计算机科学》
CSCD
北大核心
2014年第1期156-162,共7页
Computer Science
基金
2010年度国家教育部高等学校博士学科点专项科研基金资助项目(20103218110017)
江苏高校优势学科建设工程项目(PAPD)资助
关键词
双曲线定位模型
梯度
受限空间
安全定位
Hyperbolic location model,Gradient,Constrained space,Secure localization
