中国空间科学技术

中国空间科学技术 ›› 2021, Vol. 41 ›› Issue (3): 46-51.doi: 10.16708/j.cnki.1000.758X.2021.0037

• 研究探讨 • 上一篇    下一篇

前向数据接入方式对导航星座网络通信性能的影响分析

王琦1,*，邵丰伟2，顾亚楠3   

  1. 1 北京跟踪与通信技术研究所，北京100094
    2 上海微小卫星工程中心，上海201203
    3 北京空间飞行器总体设计部，北京100094
  • 收稿日期:2020-08-05 修回日期:2020-08-27 接受日期:2020-09-18 出版日期:2021-06-25 发布日期:2021-06-25
  • 通讯作者: 王琦：softfiona@163.com E-mail:softfiona@163.com
  • 作者简介:王琦（1984-），女，硕士，助理研究员，研究方向为星间链路与运行管理技术研究与系统论证，softfiona@163.com。

Influence of forward data access modes on navigation constellation network communication performanc

WANG Qi1,*，SHAO Fengwei2，GU Yanan3   

  1. 1 Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094，China
    2 Shanghai Microsatellite Engineering Center, Shanghai 201203，China
    3 Beijing Institute of Spacecraft System Engineering, Beijing 100094，China
  • Received:2020-08-05 Revised:2020-08-27 Accepted:2020-09-18 Published:2021-06-25 Online:2021-06-25
  • Contact: 王琦：softfiona@163.com E-mail:softfiona@163.com
  • About author:王琦（1984-），女，硕士，助理研究员，研究方向为星间链路与运行管理技术研究与系统论证，softfiona@163.com。

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摘要： 对采用时分多址轮询建链体制的导航星座星间链路网络，为了指导星间链路网络地面前向数据接入的应用，分析了不同地面前向数据接入方式的星-星-地联合数据交互机制及其对网络通信性能的影响，并结合应用代价给出了综合评价和使用建议。以前向数据最快路径接入方式和固定节点接入方式为代表，分析了星间链路网络与地面间星星地联合数据交互机制的特点，明确了两种方式下星间链路网络拓扑路由规划策略的制定原则。通过构建Walker 24/3/1导航星座星间链路网络数据处理模型及典型星地运行场景，对两种地面前向数据接入方式仿真分析了星间链路通信容量和传输时延等网络通信性能，比较分析了通信容量及数据拥塞规律，得出前向数据最快路径接入方式相比于固定节点接入方式在通信性能上有较明显优势的结论。最后，综合给出了两种星星地联合数据交互机制的应用性评价,同时给出了在通信容量较低且通信时延要求不高、但可靠性要求较高的应用条件下，可适度采用固定节点接入方式的建议。

关键词: 前向数据接入, 数据交互机制, 导航星座, 星间链路, 通信性能

Abstract: The influence of forward data access modes on the timedivision polling chainbuilt navigation constellation intersatellite link network data interchange mechanism and communication performance was analyzed, based on which the evaluation and suggestion for the current forward data access application were given. Firstly, the satellite-satellite-station data interchange mechanisms of the quickest path and the fixed node forward data access modes were analyzed, and the corresponding topology and routing planning strategy were given. Secondly, based on the data processing models and typical simulation scenarios of the Walker 24/3/1 global navigation constellation and stations, the simulation and analysis of communication performances of capacity and transmission delay was carried out on the quickest path and the fixed node access modes, and the characteristics of network communication performance and data congestion on the two modes were compared. It is concluded that the quickest path mode has obvious advantages over the fixed node mode in communication performance. Lastly, the advantages and prices for application of the two data interaction mechanisms were evaluated, and the suggestion on proper application of the fixed node forward data access mode was given under the conditions of low communication capacity, low communication delay and high reliability.

Key words: forward data access, data interaction mechanism, navigation constellation, intersatellite link, communication performance

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