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| 天地一体化网络关键技术研究综述 |
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蒋长林1, 李清1, 王羽1, 赵丹1, 赵达毅1, 江勇1,2, 徐明伟1,3
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1.鹏城实验室, 广东 深圳 518055;2.清华大学 深圳国际研究生院, 广东 深圳 518055;3.清华大学 计算机科学与技术系, 北京 100084
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| 摘要: |
| 作为地面网络的补充和延伸, 卫星网络有助于加速弥合区域间的数字鸿沟, 扩展地面网络的覆盖和服务范围. 然而卫星网络拓扑动态性高、传播时延大、星上计算能力和存储能力均受限, 因此实现卫星网络与地面网络的有机融合, 构建覆盖全球的天地一体化网络面临路由扩展性、传输稳定性等技术挑战. 针对天地一体化网络的研究挑战, 从网络架构、路由、传输和基于组播的内容分发等方面介绍了国内外的研究现状, 并展望了天地一体化网络的发展趋势. |
| 关键词: 天地一体化网络 路由 传输 软件定义网络 网络功能虚拟化 |
| DOI：10.13328/j.cnki.jos.006753 |
| 分类号: |
| 基金项目:鹏城实验室重大攻关项目(PCL2021A03-1); 国家自然科学基金(61972189) |
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| Survey on Key Technologies in Space-ground Integrated Network |
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JIANG Chang-Lin1, LI Qing1, WANG Yu1, ZHAO Dan1, ZHAO Da-Yi1, JIANG Yong1,2, XU Ming-Wei1,3
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1.Pengcheng Laboratory, Shenzhen 518055, China;2.Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;3.Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China
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| Abstract: |
| As a complement and extension of the terrestrial network, the satellite network contributes to the acceleration of bridging the digital divide between different regions and can expand the coverage and service range of the terrestrial network. However, the satellite network features highly dynamic topology, long transmission delay, and limited on-board computing and storage capacity. Hence, various technical challenges, including routing scalability and transmission stability, are encountered in the organic integration of the satellite network and the terrestrial network and the construction of a global space-ground integrated network (SGIN). Considering the research challenges of SGIN, this study describes the international and domestic research progress of SGIN in terms of network architecture, routing, transmission, multicast-based content delivery, etc., and then discusses the research trends. |
| Key words: space-ground integrated network (SGIN) routing transmission software defined network (SDN) network function virtualization (NFV) |
