基于路边单元的交通安全消息转发机制
发布时间：2018-12-14 03:05
【摘要】：车联网的交通安全消息对减少交通事故、缓解交通拥堵有很重要的作用,但是车辆的快速移动、网络拓扑结构频繁变化和网络广播风暴极易导致交通安全消息传输失败。本文考虑使用在城市道路两边设置固定的路边单元RSU转发交通安全消息,提出了一种基于路边单元RSU的交通安全消息广播协议RABP。RABP协议的核心思想是结合V2V通信和V2R通信来高效快速传递交通安全消息。RABP协议分为两个阶段,即最优RSU选择阶段和最优RSU广播阶段。在第一阶段中,利用基于联盟博弈的方法找到最优中继车辆,直到发现车辆周边存在RSU时,然后采用基于多属性决策的最优RSU选择算法找到最优RSU,将车辆交通安全信息优先传递给RSU;在第二阶段中,利用基于RSU的智能广播算法将交通安全消息广播给覆盖范围内的车辆,同时通过有线网络将交通安全消息传递给周边RSU。本文通过国际仿真通用平台Exata和交通流仿真器VanetMobiSim来验证提出的RABP协议,并仿真模拟不同场景下的AODV协议、OLSR协议和RABP协议,对比分析三种协议的性能指标。仿真结果表明,RABP协议在交通安全消息的数据包投递率和传输平均时延性能上都有较大地提升,广播风暴也得到了较好的抑制。RABP协议可以很好地适用于城市道路的交通安全信息传输。
[Abstract]:The traffic safety information from the vehicle network plays an important role in reducing traffic accidents and alleviating traffic congestion. However, the rapid movement of vehicles, frequent changes in network topology and network broadcast storms can easily lead to traffic safety message transmission failure. This paper considers the use of a fixed roadside unit RSU on both sides of a city road to forward traffic safety messages. In this paper, a traffic safety message broadcasting protocol (RABP.RABP) based on roadside unit RSU is proposed. The core idea of RABP.RABP protocol is to combine V2V communication with V2R communication to transmit traffic safety message efficiently and quickly. The RABP protocol is divided into two stages. That is, the optimal RSU selection stage and the optimal RSU broadcast stage. In the first stage, the optimal relay vehicle is found by using the alliance game method until the existence of RSU around the vehicle is discovered, and then the optimal RSU selection algorithm based on multi-attribute decision making is used to find the optimal RSU,. Giving priority to vehicle traffic safety information to RSU; In the second stage, traffic safety messages are broadcast to vehicles in coverage area using intelligent broadcast algorithm based on RSU, and traffic safety messages are transmitted to surrounding RSU. via wired network. In this paper, the proposed RABP protocol is verified by international simulation platform Exata and traffic flow simulator VanetMobiSim, and the AODV protocol, OLSR protocol and RABP protocol under different scenarios are simulated, and the performance indexes of the three protocols are compared and analyzed. The simulation results show that the RABP protocol can greatly improve the packet delivery rate and the transmission average delay performance of traffic safety messages. Broadcast storms are also well suppressed. The RABP protocol is well suited to traffic safety information transmission on urban roads.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U492.8;TP391.44;TN929.5
本文编号：2377790
[Abstract]:The traffic safety information from the vehicle network plays an important role in reducing traffic accidents and alleviating traffic congestion. However, the rapid movement of vehicles, frequent changes in network topology and network broadcast storms can easily lead to traffic safety message transmission failure. This paper considers the use of a fixed roadside unit RSU on both sides of a city road to forward traffic safety messages. In this paper, a traffic safety message broadcasting protocol (RABP.RABP) based on roadside unit RSU is proposed. The core idea of RABP.RABP protocol is to combine V2V communication with V2R communication to transmit traffic safety message efficiently and quickly. The RABP protocol is divided into two stages. That is, the optimal RSU selection stage and the optimal RSU broadcast stage. In the first stage, the optimal relay vehicle is found by using the alliance game method until the existence of RSU around the vehicle is discovered, and then the optimal RSU selection algorithm based on multi-attribute decision making is used to find the optimal RSU,. Giving priority to vehicle traffic safety information to RSU; In the second stage, traffic safety messages are broadcast to vehicles in coverage area using intelligent broadcast algorithm based on RSU, and traffic safety messages are transmitted to surrounding RSU. via wired network. In this paper, the proposed RABP protocol is verified by international simulation platform Exata and traffic flow simulator VanetMobiSim, and the AODV protocol, OLSR protocol and RABP protocol under different scenarios are simulated, and the performance indexes of the three protocols are compared and analyzed. The simulation results show that the RABP protocol can greatly improve the packet delivery rate and the transmission average delay performance of traffic safety messages. Broadcast storms are also well suppressed. The RABP protocol is well suited to traffic safety information transmission on urban roads.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U492.8;TP391.44;TN929.5
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