用于无线传感器网络的抗攻击节点定位算法

Attack-resistant node localization algorithm for wireless sensor networks

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％。

The accuracy of location discovery for wireless sensor networks in hostile environments is improved by analyses of the effects of two attacks that are unique to localization algorithms and an attack-resistant localization algorithm. The attack-resistant localization algorithm can he divided to two steps. First, an appropriate anchor node subset is found that removes the malicious anchor nodes out. Then, the accurate locations of the sensors are calculated using the anchor node subset. Simulations show that the location discovery accuracy deteriorates in hostile environments for most existing localization algorithm, which the attack-resistant localization algorithm improves the location discovery accuracy by 22% to 31%.