基于模糊逻辑的VANET安全消息路由方法  

Fuzzy logic-based routing method for safety messages in VANET

作　　者：聂雷 张全玉 杨拓 Nie Lei;Zhang Quanyu;Yang Tuo(College of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China;Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学计算机科学与技术学院,湖北武汉430065 [2]武汉科技大学智能信息处理与实时工业系统湖北省重点实验室,湖北武汉430065

出　　处：《武汉科技大学学报》2021年第4期304-311,共8页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(61802286).

摘　　要：现有车载自组织网络(VANET)安全消息路由方法通常给度量因素设置固定权重,导致在动态车载网络环境中性能不佳,为此本文提出一种基于模糊逻辑的VANET安全消息路由方法。首先,综合考虑当前转发车辆与邻居车辆之间的相对速度、邻居车辆与安全消息目的地的方向偏差以及邻居车辆通信范围内的车辆密度等因素,利用模糊逻辑系统对所有候选车辆进行链路稳定性评估;在去除当前时刻已离开转发车辆通信范围的“边缘”车辆后,基于最大链路稳定性和最大欧几里德距离选出唯一中继。实验结果表明,本文方法在端到端时延和链路中断概率指标上比几种对比方法表现出更优的性能。Existent safety message routing methods used by vehicular ad hoc network(VANET)usually assign fixed weights to metrics,resulting in poor performance in dynamic vehicular network environments.Therefore,a fuzzy logic-based routing method for safety messages(FLRM-SM)in VANET is proposed.FLRM-SM integrates multiple factors such as the relative speed between current forwarding vehicle and neighbor vehicle,the deviation in direction between neighbor vehicle and the destination,as well as the vehicle density in neighbor vehicle’s communication range.And a fuzzy logic system is utilized to evaluate the link stability of all candidate vehicles.After removing the“edge”vehicles that are out of range of the forwarding vehicle’s communications at the current moment,the only relay is selected based on the maximum link stability value and the maximum Euclidean distance.Experimental results show that the proposed method performs better than several comparison methods in terms of end-to-end delay and link interruption probability.

关 键 词：车载自组织网络 安全消息 路由方法 模糊逻辑 链路稳定性 端到端时延 链路中断 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]