基于虚拟星座的卫星网络切片与路由策略研究  

Research on Network Slicing and Routing Strategy of Satellite Networks Based on Virtual Constellations

作　　者：王登昊 蒋佳亦 王俊涵 许都 章小宁 WANG Denghao;JIANG Jiayi;WANG Junhan;XU Du;ZHANG Xiaoning(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学信息与通信工程学院,四川成都611731

出　　处：《移动通信》2024年第9期71-79,101,共10页Mobile Communications

基　　金：国家自然科学基金项目“面向多维异构特性的地理分布式机器学习资源调度机制研究”,“类生物免疫机制的网络安全防护理论与方法”,“基于多智能体协同学习的网络资源管控机制研究”(62171085,U20A20156,62001087)。

摘　　要：现有的大规模卫星网络由于具有节点密度高、拓扑动态性强、星间切换频繁等特点,难以保障承载业务的Qo S。为解决这一问题,提出一种基于虚拟星座的拓扑控制策略,通过抽象卫星的相对位置关系构建全覆盖的静态虚拟星座网络,解决动态拓扑管理问题并简化星间切换流程。在此基础上,提出针对不同业务类型的虚拟网络切片构建方案,实现网络资源的按需分配和定制化管理。同时,针对切片网络中的虚拟路径,采用改进的动态映射算法规划物理网络的星间路由,保障多样化业务的端到端Qo S要求。仿真结果表明,与其他路由算法相比,所提出的算法在求解时间、端到端时延以及丢包率等方面均有显著提升,在面对海量业务时表现出更好的稳定性与均衡性。Existing mega-scale satellite networks are characterized by ultra-dense nodes,highly dynamic topology and frequent inter-satellite handover,which pose challenges to guaranteeing the Qo S(Quality of Service)of carried services.To address the problem,we propose a topology control strategy based on virtual constellations.By abstracting the relative position relationships of satellites,we construct a full-coverage static virtual constellation network,which throws light on managing the dynamic topology and simplifying the inter-satellite handover.On this basis,we propose a virtual network slicing construction scheme tailored for different service types,aiming to realize the on-demand allocation and customized management of network resources.Based on the virtual paths in the sliced network,we implement an improved dynamic mapping strategy to plan the physical inter-satellite routing paths,ensuring the end-to-end Qo S requirements of diversified services.Extensive simulation results indicate that compared to other routing strategies based on virtual node or virtual topology,the proposed algorithm significantly improves the solving time,end-to-end delay and packet loss rate,and shows better stability and balance in the face of massive traffic.

关 键 词：虚拟星座 网络切片 动态映射 服务质量保证 

分 类 号：TN929.5[电子电信—通信与信息系统]