基于喷泉码的车联网数据分发方案  

Data Distribution Scheme for VANET Based on Fountain Code

作　　者：刘建航[1] 王杰冰 李世宝[1] 翁好男 董志涵 LIU Jianhang;WANG Jiebing;LI Shibao;WENG Haonan;DONG Zhihan(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,青岛266580

出　　处：《计算机与数字工程》2023年第11期2643-2649,2688,共8页Computer & Digital Engineering

摘　　要：数据传播是用于向终端用户提供信息娱乐和安全服务的主要技术之一,在该过程中,位于特定区域的车辆(OBUS)接收由路边单元(RSU)广播的数据。然而,当车辆移动较快,广播内容的数据量较大时,车辆很难在一个RSU的通信范围内收集到完整的广播内容。针对这一问题,论文提出了一种基于喷泉码的多RSU协同数据传输方案,将源数据以喷泉码编码,由多个RSU同时注入到车载自组织网络(VANET)中,RSU根据所处位置以及周边行驶车辆速度、密度使用模糊逻辑决策发送喷泉编码包数量。区域内车辆通过车对车(V2V)通信共享数据包,车辆获取到足够的编码包后重建源数据。实验结果表明,该方案在保证交付率的前提下,有效地降低了交付时间,实现了性能的明显提升。Data dissemination is one of the applications used to provide infotainment to the end-users in vehicular ad-hoc net⁃works(VANET).During this process,the vehicles receive the data broadcast by the road side unit(RSU).However,it is difficult for vehicles to collect the complete content within the communication range of one RSU when the vehicle moves at a high speed and the amount of broadcast data is large.To solve this problem,a multi-RSU cooperative data distribution scheme based on fountain code is proposed in this paper.The source data is encoded by fountain code and poured into the VANET by multiple cooperative RSUs,the RSUs use fuzzy logic to determine the number of fountain code packets according to their locations,the speed and densi⁃ty of surrounding vehicles.The vehicles in the area share data packets through V2V communication,vehicles can reconstruct the source data after obtaining enough encoded packets.The experimental results show that on the premise of ensuring the delivery rate,the proposed scheme can reduce the delivery delay and achieve a significant improvement in performance.

关 键 词：车联网 数据分发 喷泉码 RSU协作 

分 类 号：TE46[石油与天然气工程—油气田开发工程]