Topological Scenario Emulation Technology of Space-Ground Integrated Satellite Network

doi:10.3778/j.issn.1002-8331.2108-0446

Abstract

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

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

CHEN Xinyu, WANG Xiaofeng, LIU Yuan. Topological Scenario Emulation Technology of Space-Ground Integrated Satellite Network[J]. Computer Engineering and Applications, 2022, 58(20): 87-97.

陈新宇, 王晓锋, 刘渊. 天地一体化卫星网络拓扑场景仿真技术[J]. 计算机工程与应用, 2022, 58(20): 87-97.

References

[1] 张乃通，赵康僆，刘功亮.对建设我国“天地一体化信息网络”的思考[J].中国电子科学研究院学报，2015，10（3）：223-230.
ZHANG N T，ZHAO K L，LIU G L.Thought on constructing the integrated space-terrestrial information network[J].Journal of China Academy of Electronics and Information Technology，2015，10（3）：223-230.
[2] 沈学民，承楠，周海波，等.空天地一体化网络技术：探索与展望[J].物联网学报，2020，4（3）：3-19.
SHEN X M，CHENG N，ZHOU H B，et al.Space-air-ground integrated networks：review and prospect[J].Chinese Journal on Internet of Things，2020，4（3）：3-19.
[3] 张永健，康艳梅，王东昱，等.基于信息网格的卫星网络仿真方法研究[J].太原理工大学学报，2012，43（4）：453-455.
ZHANG Y J，KANG Y M，WANG D Y，et al.Research on satellite network simulation method based on information grid[J].Journal of Taiyuan University of Technology，2012，43（4）：453-455.
[4] 李刚健.基于虚拟化技术的云计算平台架构研究[J].吉林建筑工程学院学报，2011，28（1）：79-81.
LI G J.Research on cloud computing based on virtuali-
zation technology[J].Journal of Jilin Institute of Architecture & Civil Engineering，2011，28（1）：79-81.
[5] 陈全，邓倩妮.云计算及其关键技术[J].计算机应用，2009，29（9）：2562-2567.
CHEN Q，DENG Q N.Cloud computing and its key techniques[J].Journal of Computer Applications，2009，29（9）：2562-2567.
[6] 张阳.天地一体化网络节点仿真关键技术研究[D].成都：电子科技大学，2018.
ZHANG Y.Research on key technology of nodes emulation in space-ground integrated network[D].Chengdu：University of Electronic Science and Technology of China，2018.
[7] ZHANG Y，ZHANG Y，LI X Z，et al.Simulation platform of LEO satellite communication system based on OPNET[C]//Fourth Seminar on Novel Optoelectronic Detection Technology and Application，Society of Photo-Optical Instrumentation Engineers（SPIE） Conference Series，Nanjing，2018.
[8] WANG P，ZHANG J X，ZHANG X，et al.Performance evaluation of double-edge satellite terrestrial networks on opnet platform[C]//IEEE/CIC International Conference on Communications in China（ICCC Workshops），Beijing，Aug 16-18，2018.Piscataway：IEEE，2019：37-42.
[9] CHEN B L，GENG Y H.Simulation of rendezvous and docking between service spacecraft and non-cooperative target with MATLAB-Simulink and STK[C]//Proceedings of the 11th World Congress on Intelligent Control and Automation，Shenyang，Jun 29-Jul 4，2014.Piscataway：IEEE，2015：5727-5732.
[10] 林萍，王汝传，徐小龙.基于NS2的Walker星座卫星网仿真的研究[J].计算机技术与发展，2009，19（10）：189-192.
LIN P，WANG R C，XU X L.Study of satellite networks simulation in walker based on ns2[J].Computer Technology and Development，2009，19（10）：189-192.
[11] WANG Z，CUI G F，LI P X，et al.Design and implementation of ns3-based simulation system of LEO satellite constellation for IoTs[C]//2018 IEEE 4th International Conference on Computer and Communications（ICCC），Chengdu，Dec 7-10，2018.Piscataway：IEEE，2018：806-810.
[12] CORNEJO A，LANDEROS S.Simulation model and comparison for satellite links in Ku and Ka bands for standards-based on DVB-S2 and NS3[J].IEEE Latin America Transactions，2016，14（4）：1689-1697.
[13] NIEHOEFER B，?UBIK S，WIETFELD C.The CNI open source satellite simulator based on OMNeT++[C]//Proceedings of the 6th International ICST Conference on Simulation Tools and Techniques，Cannes，France，Mar 5-7，2013.Berlin：Springer，2013：314-321.
[14] LI H F，ZHOU H C，ZHANG H K，et al.EmuStack：an OpenStack-based DTN network emulation platform（extended version）[J].Mobile Information Systems，2016：6540207.
[15] 刘渊，张浩，叶海洋，等.面向天地一体化信息网络的卫星链路仿真研究[J].通信学报，2018，39（4）：56-67.
LIU Y，ZHANG H，YE H Y，et al.Research on satellite link emulation for space-ground integration information network[J].Journal of Communications，2018，39（4）：56-67.
[16] LAI J Y，TIAN J Q，ZHANG K，et al.Network emulation as a service （NEaaS）：towards a cloud-based network emulation platform[J].Mobile Networks and Applications，2021，26（2）：766-780.
[17] WANG X F，CHEN X Y，YE H Y，et al.Cloud-based experimental platform for the space-ground integrated network[J].Wireless Communications and Mobile Computing，2020：8893187.
[18] BENET C H，NASIM R，NOGHANI K A，et al.OpenStackEmu—a cloud testbed combining network emulation with OpenStack and SDN[C]//2017 14th IEEE Annual Consumer Communications & Networking Conference（CCNC），Las Vegas，Jan 8-11，2017.Piscataway：IEEE，2017：566-568.
[19] 叶海洋.基于虚拟化的天地一体化网络仿真技术研究[D].无锡：江南大学，2019.
YE H Y.Research on emulation technology based on virtualization for the space-ground integrated network[D].Wuxi：Jiangnan University，2019.