VANET城市场景下一种优化的地理信息路由协议  

Improved geographical routing-protocol in urban vehicle Ad Hoc networks

作　　者：赵博龙 杨洁 

机构地区：[1]中国航空计算技术研究所,陕西西安710119

出　　处：《电子技术应用》2015年第12期72-75,共4页Application of Electronic Technique

摘　　要：车辆的高速移动以及城市场景中的障碍物使得车辆间的通信链路变得异常脆弱。而现有的多数地理信息并没有考虑链路的稳定、可靠性,产生了高的数据包丢失率和高的数据包传输时延,降低了网络性能。为此,提出了一种优化的地理信息路由协议IGR(Improved geographical)。IGR协议在数据包转发过程中,考虑了源车辆离候选车辆间的相对移动方向、候选车辆离目的车辆的距离以及beacon接收率,尊重车辆间无线链路的不稳定性事实。IGR协议择优选择具有稳定链路的车辆作为下一跳数据包转发节点。最后,评估了提出的IGR协议,并与现有的地理信息路由进行比较分析。结果表明,提出的IGR协议在数据包传输时延、数据包传输率性能优于GPCR和RBVT-R协议。The high mobility of vehicles and existing of obstacles in urban area make the communication link between vehicles to be unreliable. In this environment, most geographical routing protocols does not consider stable and reliable link during packet or- warding towards destination. Thus, the network performance will be degraded due to large number of packet losses and high packet delay. An improved geographical routing in urban vehicle Ad Hoc networks is proposed in this paper, which is marked as IGR.The proposed IG incorporates relative direction between source vehicle and candidate vehicles, distance between candidate node and des- tination and beacon reception rate,considering the fact that wireless link between vehicles is unstable, in contrast to most routing protocols, the IG protocol favors a candidate vehicle that has stable link with the source during packet forwarding.We implemented and evaluated the proposed IG protocol and then compared with existing routing solutions. The comparison shows superiority of our proposed routing solution in terms of packet delivery ratio and end to end delay as compared to the RBVT-R, GPCR.

关 键 词：车联网 地理信息路由 贪婪转发 beacon接收率 相对方向 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]