抵抗欺骗攻击的DV-Hop定位算法

Improvement of DV-Hop Localization Algorithm

由于无线传感器网络处于开放性的环境中,很容易受到欺骗攻击,即难以利用DV-Hop算法进行有效定位.针对此问题,本文在分析欺骗攻击模型和DV-Hop算法易受攻击原因的基础上,提出了一种新的抵抗欺骗攻击的DV-Hop定位算法.该算法能对参与未知节点的信标节点进行分组,并根据各个分组的加权平均残差平方和,排除可能含有恶意节点的分组,并通过利用没有恶意节点分组中的所有信标节点进行定位,从而有效抵抗了欺骗攻击.仿真结果表明,当网络中存在欺骗攻击时,DV-Hop算法仍然能够有效地定位.

In the traditional DV-Hop localization algorithm,when the unknown nodes estimate distance from the anchor nodes,they using only the average distance per hop of its recent anchor,so there is a greater positioning errors. To solve this problem,On the basis of the traditional DV-Hop algorithm,the average distance per hop of multiple anchor nodes are taken into account in this paper. The average distance per-hop of unknown nodes are weighted according to error of the average distance per hop of each anchor node and hops to bring it closer to the actual value. Estimation distance between the unknown node and the anchor node is more accurate,thus positioning error reduced. Simulation results show that positioning accuracy of the improved algorithm is significantly higher than the traditional DV-Hop localization under the same network environment.