Research on gating alignment strategy for flow scheduling in satellite formation

XU Chuan; ZHANG Rufeng; HE Xiongwen; CUI Zhaojing; ZHAO Guofeng

doi:10.11959/j.issn.1000-436x.2024118

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Research on gating alignment strategy for flow scheduling in satellite formation

Papers | 更新时间：2024-09-10

- Research on gating alignment strategy for flow scheduling in satellite formation
- Journal on Communications Vol. 45, Issue 8, Pages: 51-61(2024)
- 作者机构：
  
  1.重庆邮电大学通信与信息工程学院,重庆 400065
  2.复杂环境通信重庆市重点实验室,重庆 400065
  3.北京空间飞行器总体设计部,北京 100094
- 作者简介：
- 基金信息：
  
  The Natural Science Foundation of Chongqing(CSTB2023NSCQ-LZX0129)
- DOI：10.11959/j.issn.1000-436x.2024118
  CLC： TN927
- Received：10 January 2024，
  
  Revised：2024-05-14，
  
  Published：25 August 2024
- 稿件说明：
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徐川,张汝凤,何熊文等.卫星编队流调度的门控对齐策略研究[J].通信学报,2024,45(08):51-61.

XU Chuan,ZHANG Rufeng,HE Xiongwen,et al.Research on gating alignment strategy for flow scheduling in satellite formation[J].Journal on Communications,2024,45(08):51-61.
徐川,张汝凤,何熊文等.卫星编队流调度的门控对齐策略研究[J].通信学报,2024,45(08):51-61. DOI： 10.11959/j.issn.1000-436x.2024118.

XU Chuan,ZHANG Rufeng,HE Xiongwen,et al.Research on gating alignment strategy for flow scheduling in satellite formation[J].Journal on Communications,2024,45(08):51-61. DOI： 10.11959/j.issn.1000-436x.2024118.

摘要

针对时间敏感网络（TSN）门控调度对相邻节点同步精度要求高，星间无线链路时延波动引起相邻节点门控开启出现偏差，导致业务流在多个卫星节点的调度不一致问题，提出了一种面向卫星编队流调度的门控对齐策略。首先，分析卫星编队中影响门控调度的因素，对业务流在端口的调度时间约束进行建模，并构建门控on/off列表模型；其次，设计在线滚动灰色预测算法对节点间链路时延进行预测，基于预测结果对相邻节点的门控列表偏差进行动态修正，确保多节点门控调度的一致性；最后，基于STK和EXata搭建卫星编队软件仿真场景，同时在现场可编程门阵列（FPGA）硬件平台上实现门控对齐策略。实验结果表明，所提策略能保障卫星编队中时敏业务流经过5跳卫星节点传输后时延为3 782~3 848 μs、抖动稳定在30 μs，比现有方案提升了20%。

Abstract

Aiming at the time-sensitive network (TSN) gating scheduling required high synchronization accuracy of adjacent 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 formation 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

Keywords

references

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