中国空间科学技术 ›› 2021, Vol. 41 ›› Issue (3): 89-96.doi: 10.16708/j.cnki.1000.758X.2021.0042

• 技术交流 • 上一篇    下一篇

基于SDN架构的NFV技术在低轨卫星网络中的应用

侯筠仪1,赵黎晔2,*,申景诗1,冯飞2,王韶波2   

  1. 1 山东航天电子技术研究所,烟台264670
    2 航天东方红卫星有限公司,北京100094
  • 收稿日期:2020-09-05 修回日期:2020-11-27 接受日期:2020-12-14 出版日期:2021-06-25 发布日期:2021-06-25
  • 通讯作者: 赵黎晔:miety@sohu.com E-mail:miety@sohu.com
  • 作者简介:侯筠仪(1996-),女,硕士研究生,研究方向为空间信息网络结构技术,hjy_0410@163.com。 赵黎晔(1981-),男,高级工程师,研究方向为卫星设计,miety@sohu.com。
  • 基金资助:
    高分辨率对地观测系统重大项目基金(GFZX0406120203)

HOU Junyi1,ZHAO Liye 2,*,SHEN Jingshi1,FENG Fei2,WANG Shaobo2   

  1. 1 Shandong Institute of Space Electronic Technology,Yantai 264670,China
    2 DFH Satellite Co., Ltd.,Beijing 100094,China
  • Received:2020-09-05 Revised:2020-11-27 Accepted:2020-12-14 Published:2021-06-25 Online:2021-06-25
  • Contact: 赵黎晔:miety@sohu.com E-mail:miety@sohu.com
  • About author:侯筠仪(1996-),女,硕士研究生,研究方向为空间信息网络结构技术,hjy_0410@163.com。 赵黎晔(1981-),男,高级工程师,研究方向为卫星设计,miety@sohu.com。
  • Supported by:
    高分辨率对地观测系统重大项目基金(GFZX0406120203)

摘要: 针对当前卫星网络通信业务需求复杂、星上设备对多业务兼容性差的问题,提出了一种面向低轨卫星网络的软件定义网络(SDN)架构。该架构设计了以星间链路为基础的虚拟化数据平面和多控制器的分布式控制平面,具有高度灵活和可编程的特性。通过网络功能虚拟化(NFV)技术实现了数据平面虚拟化和集群化控制器的功能分割,给出了架构实现的关键技术方案,使其能够实现数据传递的高效动态分配。最后仿真验证了在快速路由重构方面,该SDN卫星网络架构相较于传统卫星网络,在反向缝场景下全网平均网络查询时延更为稳定,且平均时延缩短了82.4%,进一步验证了其控制器数量选择的科学性,体现了该SDN卫星网络架构的先进性。

关键词: 低轨卫星网络, 卫星通信, 软件定义网络, 网络功能虚拟化, 控制器集群

Abstract: In the context of satellite network communication services with complex requirements and poor service compatibility of on-board equipment, a software-defined network (SDN) architecture for low-orbit satellite network was proposed.  A virtualized data plane based on inter-satellite links and a distributed control plane with multiple controllers were designed in this architecture, which was highly flexible and programmable. Through the network function virtualization (NFV) technology, the data plane virtualization and the functional division of the clustered controller were realized, and the key technical solutions for the realization of the architecture were given to enable the efficient and dynamic allocation of data transmission. The simulation verifies that the SDN satellite network architecture is more stable than the traditional satellite network in the reverse seam scenario in terms of fast route reconfiguration. In the simulation results, the average reconstruction delay is shortened by 82.4%, and the scientific choice of the number of controllers is verified. The simulation results reflect the advanced nature of the SDN satellite network architecture.

Key words: LEO, satellite communication, SDN, NFV, controller integration

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