摘要
将卫星网络、无人机集群引入物联网应用,为第6代移动通信系统提供了参考的应用场景.对天基物联网中各层的数据收集方法进行了分析,提出了天基物联网中的数据收集策略.融合当前网络编码和多层分布式LT码的优势,提出了一种基于改进双层LT码的数据收集策略.该策略采取自适应分组编码机制,避免了因多路径交叉导致的数据丢失.仿真实验结果表明,该策略能够在网络连接不稳定的情况下,有效提升数据传输的成功率和吞吐量.
Satellite networks and unmanned aerial vehicles(UAVs)are introduced into Internet of things,which provides a typical application for the sixth generation of mobile communication system(6 G).Data transmission methods for each layer in the space-based Internet of things are analyzed,and one new data collection strategy is proposed.Combining the advantages of current network coding and multi-layer distributed LT codes,a data collection strategy based on improved double-layer LT codes is proposed.This strategy adopts adaptive block coding mechanism to avoid data loss caused by multi-path crossover.Simulation results show that this strategy can effectively improve the success rate and throughput of data transmission when the network connection is unstable.
作者
何建华
赵辉
徐晓斌
闫蕾
王尚广
HE Jian-hua;ZHAO Hui;XU Xiao-bin;YAN Lei;WANG Shang-guang(Electric Information Department,Technology and Engineering Center for Space Utilization(Chinese Academy of Sciences),Beijing 100094,China;Beijing Advanced Innovation Center for Future Network Technology,Beijing University of Technology,Beijing 100124,China;Key Laboratory of Space Utilization,Chinese Academy of Sciences,Beijing 100094,China;The State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2020年第6期118-125,共8页
Journal of Beijing University of Posts and Telecommunications
基金
载人航天工程预研项目(18128060401)
中国电科空间网络智能化技术研究项目(GS2019002)
关键词
第6代移动通信系统
天基物联网
数据收集
网络编码
the sixth generation of mobile communications system
space-based internet of things
data collection
network coding
作者简介
何建华(1986—),男,工程师;通信作者:闫蕾(1978—),女,高级工程师,E-mail:yanlei@csu.ac.cn.
