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为了提高无线传感器网络在存在恶意攻击时的节点定位精度,该文分析了2种典型的攻击模型对节点定位精度的影响,并提出了一种抗攻击的节点定位算法。抗攻击的节点定位算法首先从全部锚节点集合中选择出尽可能不包含恶意锚节点的锚节点子集,然后利用该子集中的锚节点实现定位。仿真结果表明,当存在恶意攻击时,已有的大多数定位算法节点定位精度将显著降低;与已有的大多数的定位算法相比,抗攻击的定位算法可将定位精度提高约22%~31%。
In order to improve the node localization accuracy of wireless sensor networks in the presence of malicious attacks, this paper analyzes the impact of two typical attack models on the node localization accuracy and proposes an anti-attack node localization algorithm. The anti-attack node location algorithm first selects a subset of anchor nodes that contain as few as possible malicious anchor nodes from all the anchor node sets, and then uses the anchor nodes in the subset to locate. The simulation results show that when there is a malicious attack, the positioning accuracy of most of the existing positioning algorithms will be significantly reduced. Compared with most existing positioning algorithms, the anti-attack positioning algorithm can improve the positioning accuracy by about 22% 31%.