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计算机工程 ›› 2019, Vol. 45 ›› Issue (2): 58-63. doi: 10.19678/j.issn.1000-3428.0051449

所属专题: 物联网专题

• 物联网专题 • 上一篇    下一篇

基于网络编码的车联网D2D视频分发技术研究

陈鑫1,王磊1,2,孙中伟1   

  1. 1.南京邮电大学 计算机学院 软件学院 网络空间安全学院,南京 210023; 2.江苏省大数据安全与智能处理重点实验室,南京 210023
  • 收稿日期:2018-05-07 出版日期:2019-02-15 发布日期:2019-02-15
  • 作者简介:陈鑫(1994—),女,硕士研究生,主研方向为车联网、网络编码、D2D通信;王磊,讲师;孙中伟,硕士研究生。
  • 基金资助:

    国家自然科学基金(61502249);江苏省科技支撑计划(BK20150846);南京邮电大学科研启动基金(214167);华为创新基金(HIRP20140116);江苏省博士后基金(1501041C);中国博士后基金(2016M590484)。

Research on Internet of Vehicles D2D Video Distribution Technology Based on Network Coding

CHEN Xin 1,WANG Lei 1,2,SUN Zhongwei 1   

  1. 1.School of Computer Science,Nanjing University of Posts and Telecommanication,Nanjing 210023,China; 2.Jiangsu Key Laboratory of Big Data Security and Intelligent Processing,Nanjing 210023,China
  • Received:2018-05-07 Online:2019-02-15 Published:2019-02-15

摘要:

为在车联网中实现高可靠性、低时延、高速率视频分发,面向设备与设备通信提出一种基于随机线性网络编码(RLNC)的视频分发方案。源节点将要分发的视频文件通过RLNC进行分片编码,编码后的数据片分发给道路上的移动设备。每个移动设备接收到数据片后,经过再编码向其他设备分发。当设备在接收到一定数量的线性无关的数据后,对数据片进行解码得到原始数据。设计模式切换、无线接入点选择、主动式再编码3种策略减少视频分发的延迟。实验结果表明,与传统基于复制的传输方案和基于即时可解的网络编码传输方案相比,该方案具有更高的分发效率。

关键词: 网络编码, 设备与设备通信, 视频分发, 车联网, 可靠性, 时延

Abstract:

To implement high-reliable,low-delay,and high-rate video distribution in Internet of vehicles,this paper proposes a video distribution scheme based on Random Linear Network Coding(RLNC) for Device-to-Device(D2D) communications.The source node equally splits the video file into multiple segments,and encodes the data segments with RLNC.Each mobile device receives a data segment from the source node,and distributes data segments to other devices after re-encoding.When the device receives a fixed number of linearly independent data segments,it decode data segments to gain the original data.In order to reduce the delay of data distribution,this paper designs three strategies including mode switching,Access Point (AP) selection,and active re-encoding.Experimental results show that compared to the traditional replication-based transmission scheme and the transmission scheme based on Instantly Decodable Network Coding(IDNC),the proposed scheme has higher distribution efficiency.

Key words: network coding, Device-to-Device(D2D) communications, video distribution, Internet of vehicles, reliability;delay

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