异构IWSN下对Sybil攻击源的定位

Location of Sybil Attack Source under Heterogeneous IWSN

针对工业无线传感器网络中女巫攻击源定位问题,采用一种基于RSSD的定位估计算法。首先,利用DV-Hop算法估计出未知参考节点的坐标并对RSSI值预处理。其次,将攻击节点位置估计问题转化为对非线性方程组的解算问题,分别利用最小二乘法和泰勒级数展开法对攻击节点进行定位。MATLAB仿真结果表明该定位算法可以有效地减少噪声的干扰,解决攻击源不配合定位和信标节点数量少的问题,显著提高节点定位精度。

An RSSD-based location estimation algorithm is adopted to against the problem of Sybil attack source location in industrial wireless sensor networks. First,use DV-Hop algorithm to estimate the coordinates of unknown reference nodes and preprocess the RSSI value. Then,transform the attack node position estimation problem into a solution to the nonlinear equations. The attack nodes are located by using the least square method and the Taylor series expansion method. MATLAB simulation results show that the localization algorithm can effectively reduce the noise interference,solve the problem that the attack source does not cooperate with positioning and the number of beacon nodes is too,and significantly improve the node positioning accuracy.