VANETs中基于分布式TDMA的协作网络编码方法  

Cooperative Network Coding in VANETs Based on Distributed TDMA

作　　者：欧莽[1] 汪继文[1] OU Mang;WANG Jiwen(School of Computer Science and Technology,Anhui University,Hefei 230601,Anhui,China)

机构地区：[1]安徽大学计算机科学与技术学院

出　　处：《华南理工大学学报（自然科学版）》2020年第1期104-113,共10页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61502142,61872001)~~

摘　　要：针对VANETs上行链路应用场景,提出了一种分布式TDMA的协作网络编码通信方法,协作节点利用MIMO_NC技术编码自身业务数据和其它节点传输失败的数据,实现在发送自身业务数据的同时协作重发其它节点传输失败的数据。所提方法利用分布式TDMA内在机制来确认数据传输结果,并采用消息搭载机制交换相关控制信息,避免发送专门的控制分组。理论分析和实验结果表明,所提方法能够显著提高数据接收概率、有效降低数据传输时延和丢包率。A cooperative network coding communication method based on distributed TDMA( time division multiple access)was proposed for the VANETs uplink application scenario.The cooperative node uses the MIMO_NC technology to encode its own service data and packets that failed to be transmitted by other nodes,so as to cooperatively retransmit the failed data packets while transmitting their own service data.The proposed method utilizes the intrinsic mechanism of distributed TDMA to confirm the data transmission result,and uses the message carrying mechanism to exchange relevant control information to avoid sending special control packets.The theoretical and experimental results show that the proposed method can significantly improve the packet reception probability and effectively reduce the packet transmission delay and packet dropping rate.

关 键 词：车载自组织网 分布式TDMA 协作通信 网络编码 数据接收概率 数据传输时延 丢包率 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]