一种P2P加速传输补偿的车联网协助下载方法

发布时间：2018-03-18 14:00

本文选题：车载自组网(VANET)　切入点：PP共享传输　出处：《合肥工业大学学报(自然科学版)》2017年09期 　论文类型：期刊论文

【摘要】：针对公路上路侧单元(road side unit,RSU)部署稀疏且通信范围有限所导致的用户在通信盲区内无法访问Internet的问题,对高速公路场景下的车辆在RSU覆盖区下载数据进行模型研究,文章提出了一种P2P加速传输补偿的协助下载方法。该方法充分利用了车辆间P2P共享传输和协助车辆携带剩余的传输数据来提高系统的吞吐量,并结合数据冗余分配算法协调车辆因车速的不稳定性引起的丢包率过高的问题。仿真结果表明,该方法提高了协助车辆的精确性、传输成功率和速率稳定性,避免过多的选择车辆导致的系统资源浪费;车辆携带冗余数据虽然占用了一些系统资源,但系统容错率相应地得到了补偿性的提高。
[Abstract]:In view of the problem that users can not access the Internet in the communication blind area caused by the sparse deployment of road side unit on the highway, the model of downloading data in the RSU coverage area of the vehicle in the freeway scene is studied. In this paper, a P2P accelerated transmission compensation assisted download method is proposed, which makes full use of P2P sharing transmission between vehicles and assisting vehicles to carry the remaining transmission data to improve the system throughput. Combined with the data redundancy allocation algorithm, the problem of high packet loss rate caused by the instability of vehicle speed is coordinated. The simulation results show that the proposed method improves the accuracy, the transmission success rate and the rate stability of the assisted vehicle. In order to avoid the waste of system resources caused by excessive selection of vehicles, the system fault-tolerance rate is improved compensatively, although the redundant data of vehicles take up some system resources.
【作者单位】：合肥工业大学计算机与信息学院;安全关键工业测控技术教育部工程研究中心;合肥工业大学机械工程学院;
【基金】：国家电子信息产业发展基金资助项目(工信部财函[2011]506号)
【分类号】：TN929.5

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