一种分布式车联网多跳信息广播协议  

A Multi-hop Information Broadcast Protocol in Distributed Vehicular Networks

作　　者：赵海[1] 田婷婷[1] 樊景超[2] 刘鹏[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819 [2]中国农业科学院农业信息研究所,北京100081

出　　处：《东北大学学报（自然科学版）》2014年第9期1244-1248,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(61101121);国家高技术研究发展计划项目(2013AA102505);辽宁省科技项目教育厅一般项目(L2013096)

摘　　要：传统车联网通过蜂窝网进行信息传输,该传输方式延迟时间较长,难以应用于实时性高的报警信息的传输.然而,通过宽带无线网络的多跳广播方式,传输报警信息可以有效地减少延时.针对分布式车联网的特点,提出了基于地理位置、面向发送端的多跳交替广播协议AMBP(alternating multi-hop broadcast protocol).首先,根据邻居车辆信息表中记录的车辆节点信息,选择下一跳中继节点.然后,利用邻居车辆信息表中的信息,计算交替信息发送阈值.最后,根据报警信息数据帧长度与交替信息发送阈值的关系,采取不同的发送策略.实验结果表明,AMBP协议降低了丢包率,减小了多跳传输延迟和延迟抖动,适合应用在分布式车联网环境.In traditional vehicular networks, most of the information transmissions were conducted by mobile cellular networks. One of the shortcomings of transmissions with cellular networks is the very long delay time, and consequently it is not applicable to real-time alarm information. However, in broadband wireless networks, the end-to-end delay of alarm information delivered through multi-hop broadcast transmission can be greatly decreased. According to the characteristics of vehicular networks, a transmitter-oriented AMBP（ alternating multi-hop broadcast protocol）was proposed on the basis of geographical position. In the protocol, the next hop relaying node was selected by a vehicle and the alternate transmission threshold value was calculated with the neighbor information that was kept in its neighbor vehicle table. Finally, different transmission policies were taken by the proposed AMBP based on the relationships between packet size and the transmission threshold value. Experimental results showed that packet loss rate, transmission delay, and delay jitter can be successfully reduced by the proposed AMBP, which demonstrates that it is more suitable for distributed vehicular communication environment.

关 键 词：分布式车联网 多跳传输 中继节点 报警信息 广播协议 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]