通信学报2024，Vol.45Issue(8)：51-61,11.DOI:10.11959/j.issn.1000-436x.2024118
卫星编队流调度的门控对齐策略研究
Research on gating alignment strategy for flow scheduling in satellite formation
摘要
Abstract
Aiming at the time-sensitive network(TSN)gating scheduling required high synchronization accuracy of adja-cent nodes,the delay fluctuation of inter-satellite wireless links caused the deviation of gate opening of adjacent nodes,resulting in the problem of inconsistent flow scheduling,a gating alignment strategy for flow scheduling in satellite for-mation was proposed.Firstly,the factors that affect the gating scheduling in satellite formation were analyzed,and the scheduling time constraints of traffic flow at switch ports were modeled to establish a gating on/off list model.Secondly,an online rolling gray scale prediction algorithm was designed to predict the delay of inter-node links,and based on the prediction results,the gated list deviation of neighboring nodes could be corrected dynamically to ensure the consistency of multi-node gated scheduling.Finally,the satellite formation software simulation scenario was established based on STK and EXata,moreover,the gating alignment strategy also was implemented on field programmable gate array(FPGA)hardware platform.The experimental results demonstrate that the proposed strategy can ensure that after 5-hops satellite transmission,the time delay of the time-sensitive traffic flow keeps on 3 782～3 848 μs,and the jitter is stable at 30 μs,which is 20%lower than the existing schemes.关键词
卫星编队/时敏业务/门控对齐/确定性传输Key words
satellite formation/time-sensitive service/gate alignment/deterministic transmission分类
信息技术与安全科学引用本文复制引用
徐川,张汝凤,何熊文,崔钊婧,赵国锋..卫星编队流调度的门控对齐策略研究[J].通信学报,2024,45(8):51-61,11.基金项目
国家自然科学基金资助项目(No.62171070) （No.62171070）
重庆市自然科学基金资助项目(No.CSTB2023NSCQ-LZX0129) （No.CSTB2023NSCQ-LZX0129）
重庆市博士后科学基金资助项目(No.CSTB2022NSCQ-BHX0043) The National Natural Science Foundation of China(No.62171070),The Natural Science Foundation of Chongq-ing(No.CSTB2023NSCQ-LZX0129),Chongqing Post-Doctoral Science Fund Project(No.CSTB2022NSCQ-BHX0043) （No.CSTB2022NSCQ-BHX0043）
