基于分簇的车载自组网可信路由协议研究

摘要

Focused on the security issues about clustering routing protocol which is more suitable for VANET(vehicular Ad Hoc network),a trust routing of the clustering algorithm which took weights into consideration was proposed. The algorithm takes the situation of the nodes’ sending and receiving data packets during a period of communications as the reputation value. When processing the cluster head,the nodes’ reputation value is an important weighting factor.The timely changes of the reputation value can help exclude the low credit nodes from the communications. The cooperation of trust weight and reputation value can lead to safer VANET and lower load. Simulations show that the improved algorithm,compared with WCA,has a better ability to counter selfish nodes.%针对较适用于车载自组网的分簇式路由协议的安全问题，提出一种基于分簇的可信路由算法，即在簇头选择过程根据权重因子进行筛选。该算法将节点通信过程中在一定时间内收发数据包的好坏程度作为其信誉值，在选择簇头过程中将节点的信誉值作为重要的权重因子，由于通信过程中信誉值实时更新，可将低于信誉阀值的节点剔除，从而达到安全目的，实现了在车载自组网中的可信路由。实验结果表明，该算法较WCA(weighted clustering algorithm)算法具有较高的抵抗自私节点的能力。