一种基于拟牛顿迭代的安全定位算法

A secure localization algorithm based on quasi-Newton interation

由于无线传感网络通常需要部署在无人看管的环境中,网络中节点的位置信息很容易受到各种恶意攻击,导致大部分节点不能准确地确定自身位置,进而破坏整个网络后续工作的进行。针对无线传感网络安全定位问题,提出了一种基于拟牛顿迭代的安全定位算法。基于定位过程中遭受的恶意攻击特点,建立了对应的距离测量攻击模型,利用拟牛顿迭代算法对所有定位数据进行迭代运算,根据梯度的数学特性找出并过滤恶意锚节点,实现节点的安全定位。仿真结果表明,提出的安全定位算法能够很好地抵御恶意攻击对节点定位的影响,具有较好的定位性能,并且有很强的鲁棒性。

Wireless sensor networks usually deployed in the unattended environment where some of the nodes are vulnerable to malicious attacks, which preventing accurate localization of the remaining sensor nodes, and further undermining the performance of follow-up work in the whole network. A security localization algorithm based on quasi-Newton method was proposed, against the problem of the security localization in wireless sensor network. Based on the characteristics of malicious attacks suffered during positioning, a eorresponding model of distance measurement attack was established. The quasi-Newton interation algorithm is applied to the iterative operation of all the location data, meanwhile identifying and filtering malieious anchor node based on the mathematieal properties of the gradient in order to aehieve more aecuraey localization of the sensor nodes. Simulation result shows that the proposed algorithm can withstand such malicious attacks efficiently, and with better positioning performance and strong robustness.