车载网络环境下消息携带车辆的选择方案  

Selection scheme of message carried vehicles in vehicle network environment

作　　者：刘婧[1] 王新华[1,2] 王硕[1] 

机构地区：[1]山东师范大学信息科学与工程学院,济南250014 [2]山东省分布式计算机软件新技术重点实验室,济南250014

出　　处：《计算机应用》2011年第9期2349-2351,2372,共4页journal of Computer Applications

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(2010BSE14022)

摘　　要：针对城市车载自组织网络拓扑的动态性,现有消息传播方案单个车辆较难在某路边接入点(AP)通信范围内完全进行文件下载,具有只能在等待下个AP进行文件通信的长时延局限性,提出利用多个车辆在多个空闲AP通信范围内协同地对同一文件进行分片下载传播,将消息送达时延分为直接相遇时延和间接相遇时延分别进行讨论,并给出了具体的消息携带车辆选择方案。通过对实验结果中消息丢包率和时延分析说明,在环境中加入该方案能够有效提高文件下载的可靠性,减少下载到目的车辆的时延,不会使网络产生较大的额外负载。For the dynamic characteristic of vehicle Ad-Hoc network＇s topology, the file is difficult to completely downloaded within the communication of a single vehicle road Access Point （AP） using the existing schemes of information dissemination, having the long time delay limitation of waiting for the next AP to document communication. A method that downloaded and spread the file fragmentation using multiple vehicles within the range of some free APs was proposed, the message delivery delay was divided into direct and indirect encounter delays, and discussion was made on them respectively, and a specific option was given to choose message carried vehicles. The experimental results of the message loss rate and delay show that the environment joined with the proposed scheme can effectively improve the reliability of message downloading, shorten the delay of downloading message to the purpose vehicle, without significant additional load to the network.

关 键 词：车载网络 城市 路边接入点设施 协同 车辆选择 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术] TP393.19[自动化与计算机技术—计算机科学与技术]