计算机工程与应用 ›› 2022, Vol. 58 ›› Issue (20): 87-97.DOI: 10.3778/j.issn.1002-8331.2108-0446

• 网络、通信与安全 • 上一篇    下一篇

天地一体化卫星网络拓扑场景仿真技术

陈新宇,王晓锋,刘渊   

  1. 江南大学 人工智能与计算机学院,江苏 无锡 214122
  • 出版日期:2022-10-15 发布日期:2022-10-15

Topological Scenario Emulation Technology of Space-Ground Integrated Satellite Network

CHEN Xinyu, WANG Xiaofeng, LIU Yuan   

  1. School of Artificial Intelligence and Computer Science, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Online:2022-10-15 Published:2022-10-15

摘要: 网络仿真可为天地一体化卫星网络的新技术评测提供有力支撑。面向天地一体化卫星网络拓扑场景固有的异构性、动态性特点,提出一种天地一体化卫星网络拓扑场景仿真技术。设计了面向异构、动态卫星网络拓扑的统一描述模型,以及研究了基于统一描述模型的拓扑自动解析与仿真场景生成方法,提升了仿真场景生成的易用性;从是否时变性的角度出发,设计了面向各类星间链路与星地链路的分类方法,将链路分为时变性和非时变性两种,针对非时变性链路,通过引入链路模型预加载机制,提升了卫星链路的仿真效能以及响应速度;针对链路仿真过程中延时仿真精确度低的问题,设计了链路仿真校正策略,实现了卫星链路高逼真、实时、动态的仿真。构建了多种天地一体化卫星网络场景,实验结果表明:所提出的技术具备高效的卫星网络仿真拓扑的自动生成能力;与现有技术相比,该技术在卫星链路仿真效能与仿真逼真性方面具有明显优势。

关键词: 天地一体化信息网络, 卫星网络, 网络仿真, 链路仿真, 卫星链路模型

Abstract: Network emulation can provide strong support for the evaluation of new technologies of space-ground integrated satellite network. Aiming at the inherent heterogeneity and dynamic characteristics of the space-ground integrated satellite network topology scenario, a space-ground integrated satellite network topology scenario emulation technology is proposed. Firstly, a unified description model for heterogeneous and dynamic satellite network topologies is designed, and a method for automatic topology analysis and emulation scenario generation based on the unified description model is studied to improve the usability of emulation scenario generation. Secondly, from the perspective of time-varying characteristic, a method for classifying various inter-satellite and satellite-ground links is designed. The links are divided into time-varying and time-invariant. For time-invariant links, a link model preloading mechanism is introduced to improve the emulation efficiency and response speed of satellite links. Finally, in response to the low delay emulation accuracy in the process of link emulation, a link emulation remedy strategy is formulated to emulate real-time and dynamic satellite links with high fidelity. A variety of space-ground integrated satellite network scenarios are constructed. The experimental results indicate that the proposed technology has efficient automatic generation capability of satellite network emulation topologies and is obviously superior to existing technologies in the emulation efficiency and fidelity of the satellite links.

Key words: space-ground integrated information network, satellite network, network emulation, link emulation, satellite link model