车辆间安全信息的喷泉传输方案及最优跳数分析  

A Fountain Transmission Scheme for Inter-vehicle Safety Message Transmission and Analysis of the Optimal Hop Number

作　　者：雷维嘉[1] 李世成[1] 陈佳[1] 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《哈尔滨理工大学学报》2013年第5期70-75,81,共7页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(61271259);重庆市自然科学基金(CTSC2011jjA40006);重庆市教委科学技术研究项目(KJ120501;KJ120502);重庆市教委项目(Kjzh11206)

摘　　要：针对交通系统中的突发事故信息高效率、低时延的广播传输需求,提出一种基于喷泉编码的车辆间安全信息的多跳传输方案,并对最优传输跳数进行理论分析.通过采用喷泉广播传输,并根据最优跳数选择适当的中继车辆,安全信息的广播传输效率可明显提升,传输时延减少.此外,本文也在车辆位置指数分布模型下,按照理论最佳中继车辆位置最近原则进行中继车辆选择,对车辆间信息的喷泉传输方案进行了仿真.仿真结果证明理论分析准确,方案对实际通信性能的改善明显.Considering the demand that traffic accident information needs to be broadcasted with high-efficiency and low-latency, this paper proposed a novel multi-hop transmission scheme based on fountain codes for inter-ve- hicular safety information transmission, and theoretically analyzed the optimal transmission hop number. Through a- dopting the fountain broadcast transmission and selecting proper relay vehicle according to the optimal transmission hop number, the efficiency of safety information broadcast transmission can be improved and the transmission delay can be decreased obviously. Moreover, the fountain scheme for inter-vehicular information transmission was simula- ted where vehicle location distribution is followed to exponential function and the relay vehicle was selected accord- ing to the principle of nearest position to the optimal relay vehicle location in theory. The simulation results demon- strated that the theory analysis was correct and practical communication performance was improved obviously through the scheme.

关 键 词：车辆间通信 多跳广播传输 数字喷泉码 安全信息 

分 类 号：TN929.54[电子电信—通信与信息系统]