一种高效的低轨卫星网络反向缝建链策略

doi:10.7523/j.ucas.2021.0039

中国科学院大学学报 ›› 2023, Vol. 40 ›› Issue (2): 240-249.DOI: 10.7523/j.ucas.2021.0039

• 电子信息与计算机科学 • 上一篇下一篇

一种高效的低轨卫星网络反向缝建链策略

刘宇婷^1,2,3, 田丰¹, 李国通^1,2,3

1. 中国科学院微小卫星创新研究院, 上海 201203;
2. 中国科学院大学, 北京 100049;
3. 上海科技大学, 上海 201210

收稿日期:2021-02-05 修回日期:2021-04-08 发布日期:2021-07-02
通讯作者: 李国通,E-mail:ligt@microsate.com
基金资助:
上海市青年科技英才扬帆计划（18YF1422100）资助

An efficient link-building strategy for cross seam in LEO satellite network

LIU Yuting^1,2,3, TIAN Feng¹, LI Guotong^1,2,3

1. Innovation Academy for Microsatellites, Chinese Academy of Sciences, Shanghai 201203, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. ShanghaiTech University, Shanghai 201210, China

Received:2021-02-05 Revised:2021-04-08 Published:2021-07-02

摘要/Abstract

摘要： 近年来，低轨卫星通信系统凭借全球覆盖和灵活部署等优势，受到学术界和工业界的广泛关注。在低轨卫星通信系统中，星间链路将多个卫星连接成一个动态网络，如何降低网络的通信时延是一个亟待解决的研究问题。针对Walker极轨道星座的反向缝建链问题，提出一种星形交叉循环建链策略（SCLBS）。将反向缝两侧的轨道划分为多个交叉建链区，通过动态建立星间链路，优化传输时延，为极轨道反向缝提供稳定的建链方案。在飞机和船舶等实际业务场景下对SCLBS进行仿真，结果表明与基于最近卫星准则和基于最长可视时间准则等建链策略相比，SCLBS能够有效降低30%~60%的传输时延，明显提升系统性能。

关键词: 低轨卫星, 星间链路, 时延, 反向缝, 建链策略

Abstract: Recently, the low earth orbit (LEO) satellite communication system has received wide attention from academia and industry, due to its global coverage and flexible construction. In the LEO satellite communication system, satellites are connected to a dynamic network through the inter-satellite link (ISL). How to reduce the communication delay of the network is an urgent research problem to be solved. For the problem of cross seam link-building of the Walker polar orbit constellation, this paper proposes a star cross looping link-building strategy (SCLBS). SCLBS divides the orbits into multiple cross link-building areas on both sides of cross seam and the transmission delay can be optimized by dynamically established ISL, providing a stable link-building scheme for polar orbit cross seam. SCLBS is applied to actual business scenarios such as the airplane and ship, and the test results show that SCLBS can effectively reduce the transmission delay by 30% to 60% compared with the link-building strategies based on the nearest satellite criterion and the longest visible time criterion, and significantly improve system performance.

Key words: LEO satellite, ISL, time delay, cross seam, link-building strategy

中图分类号:

TN927+.2

刘宇婷, 田丰, 李国通. 一种高效的低轨卫星网络反向缝建链策略[J]. 中国科学院大学学报, 2023, 40(2): 240-249.

LIU Yuting, TIAN Feng, LI Guotong. An efficient link-building strategy for cross seam in LEO satellite network[J]. Journal of University of Chinese Academy of Sciences, 2023, 40(2): 240-249.

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一种高效的低轨卫星网络反向缝建链策略

An efficient link-building strategy for cross seam in LEO satellite network

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