感知移动性的V2V切换管理关键技术研究

发布时间：2018-02-13 06:58

本文关键词： 车载自组织网络基于位置的路由协议模糊逻辑 V2V QoS　出处：《南京邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：车辆间通信(Vehicle-to-Vehicle,V2V)是车载自组织网络(Vehicular Ad Hoc Networks,VANET)的主要通信方式之一。然而,车辆快速移动、网络拓扑结构的不断变化,以及障碍物等其他问题的存在使得车辆之间的通信链路是不可靠的,且效率非常低。基于位置的路由协议比较适合动态变化的V2V通信。但是,由于缺乏对道路段连通性和道路拓扑变化的实时感知,所选择的路由可能只是局部最优,车辆的快速移动使得通信链路频繁断开,并且没有考虑不同业务对QoS的要求。本文针对上述问题,首先介绍了V2V通信以及相关的路由协议,并着重介绍了基于位置的路由协议,介绍了基于位置的路由协议的国内外相关研究以及目前仍然存在的一些问题。然后,针对这些问题,研究了V2V切换管理的关键技术,提出了一种改进的贪婪周边无状态路由(Greedy Perimeter Stateless Routing,GPSR)协议,即感知移动性的地理路由协议(Mobility-aware Greedy Perimeter Stateless Routing,MA-GPSR)。MA-GPSR协议提出的道路之间的切换方案聚焦于道路信息收集机制和道路评估方案,分析了道路段通信链路的断开时机,并在道路段链路不通时及时切换至通信质量更好的道路段。另一方面,提出了一跳之间的切换,把移动性信息分为四类,通过对移动性信息的感知处理,判断切换的时机,并根据不同业务类型的QoS需求和距离选择最优的切换目标车辆切换来保证通信的持续性和高效性。最后,对MA-GPSR协议与现有改进的基于位置的路由协议进行了仿真分析,结果表明,MA-GPSR性能优于其他基于位置的路由协议,能够适应动态变化的V2V通信。
[Abstract]:Vehicle-to-vehicle communication (V2V) is one of the main communication methods of vehicular Ad Hoc Networks (VANET). However, with the rapid movement of vehicles, the network topology is constantly changing. And other problems such as obstacles make the communication link between vehicles unreliable and inefficient. Location-based routing protocol is more suitable for dynamic V2V communication. Due to the lack of real-time awareness of road segment connectivity and road topology changes, the route chosen may be only locally optimal, and the rapid movement of vehicles leads to frequent disconnection of communication links. In this paper, the V2V communication and related routing protocols are introduced firstly, and the location-based routing protocols are emphasized. This paper introduces the research of location-based routing protocols at home and abroad and some problems that still exist at present. Then, the key technologies of V2V handoff management are studied. In this paper, an improved greedy Perimeter Stateless routing protocol is proposed, that is, the Mobility-aware Greedy Perimeter Stateless routing protocol proposed by the Mobility-aware Greedy Perimeter Stateless routing MA-GPSR.MA-GPSR protocol focuses on the road information collection mechanism and the road evaluation scheme. This paper analyzes the disconnection time of the road segment communication link, and switches to the road segment with better communication quality in time when the road segment link does not work. On the other hand, the one-hop switching is proposed, which divides the mobility information into four categories. Based on the perception of mobility information, the timing of handoff is judged, and the optimal handoff target vehicle handoff is selected according to the QoS requirements and distances of different traffic types to ensure the continuity and efficiency of communication. Simulation results show that MA-GPSR protocol is superior to other location-based routing protocols and can adapt to dynamic V2V communication.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U495;TN929.5

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