World-Earth Integration Software-Defined Network

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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Space-Integrated-Ground Information Networks    2022, 3 (3): 46-46.   DOI: 10.11959/j.issn.2096-8930.2022031-1 Abstract （126）   HTML （26）    PDF（pc） （548KB）（108）       Knowledge map    Save Reference | Related Articles | Metrics Select Research on Intelligent Networking Architecture for the Integrated Space-Terrestrial Networks Tingting ZHANG, Nan WU, Haipeng YAO Space-Integrated-Ground Information Networks    2022, 3 (3): 47-55.   DOI: 10.11959/j.issn.2096-8930.2022031 Abstract （316）   HTML （59）    PDF（pc） （3640KB）（420）       Knowledge map    Save The integrated space-terrestrial networks (ISTN), characterized by the high-dynamic of topology, the diversifi cation of services and the constrained resource of satellites, face great challenges in the integration of networking.To achieve network capabilities of intelligent reconstruction, on-demand adjustment, eff ective management and control, the intelligent networking method for ISTN by applying SDN, NFV and artifi cial intelligence were studied.In-depth analysis of the development status of the world-earth fusion network, an intelligent and virtualization-driven world-earth fusion network architecture was proposed.On this basis, to addressed the challenges of intelligent networking brought about by network element heterogeneity, large space-time scale, and diff erentiated service requirements, the multidimensional heterogeneous data plane resource pooling, multi-domain collaborative sensing function on-demand deployment, multi-layer multi-domain hybrid network autonomous control, centralized and distributed network intelligence for ＆quot;cloud-edge＆quot; collaboration, etc.were proposed, which realized on-demand reconstruction of the world-earth fusion network and intelligent service guarantee capabilities. Table and Figures | Reference | Related Articles | Metrics Select Software Defi ned Satellite Network Assisted Multi-Domain Routing Strategy for Aeronautical Networks Mo SHA, Kaixuan SUN, Huasen HE, Wenke YUAN, Zhicheng YE, Jian YANG Space-Integrated-Ground Information Networks    2022, 3 (3): 56-64.   DOI: 10.11959/j.issn.2096-8930.2022032 Abstract （210）   HTML （21）    PDF（pc） （5233KB）（210）       Knowledge map    Save Satellite network layer and aeronautical network layer are treated as important parts of the next generation network, which will lead the world into the era of global interconnection.However, the high mobility and sparse distribution of aircraft limit the application of traditional routing algorithms originally designed for ground-based ad-hoc networks.Therefore, this paper used the aeronautical network to access software defi ned satellite network (Sat-SDN) for realizing real-time communication and state synchronization between aircraft via the inter-satellite and satellite-to-aircraft links.In order to extend the aeronautical networking and transmission mechanism to the global scope, a multiple domain division method was proposed, and an inter domain routing algorithm was presented.By analogy the refl ection principle of light, a routing learning method which limited the broadcasting of routing learning packets into a specifi c area was proposed, and eff ectively avoided severe communication overhead caused by state synchronization and fl ooding learning in large-scale networks.The real aircraft data was used for experimental simulation to compared the performance of proposed low-cost inter-domain routing algorithm (LIRA) with existing solutions.The simulation results showed that LIRA could eff ectively reduced the communication overhead and improved the transmission quality. Table and Figures | Reference | Related Articles | Metrics Select Research on Routing Optimization in Satellite Internet Based on Deep Reinforcement Learning Linhui WEI, Guowen LIU, Yu LIU, Yumei WANG Space-Integrated-Ground Information Networks    2022, 3 (3): 65-71.   DOI: 10.11959/j.issn.2096-8930.2022033 Abstract （399）   HTML （60）    PDF（pc） （2225KB）（469）       Knowledge map    Save With the rapid development of satellite communication, the satellite internet is one of the core technologies of 6G network to realize global coverage, full-time access and full scene service.The high dynamics and limited capacity of satellite network lead to a series of management and control challenges such as heterogeneous network management, dynamic resource allocation and so on.Since the machine learning-based technologies have strength in network design, the intelligent architecture of software-defi ned satellite internet was put forward.In view of the intelligent routing in satellite internet, and leverages the deep reinforcement algorithm based on double delayed deep deterministic policy gradient (TD3) to solve the network routing optimization problem.The experimental results showed that compared with DDPG algorithm, the TD3 algorithm reduced the delay by 19.19%. Table and Figures | Reference | Related Articles | Metrics Select Management of MEC Service and Optimization of Mission Migration in LEO Satellite Networks Zhihui LIU, Huan WEI, Jie YIN, Junyi WANG, Shichao JIN, Tao DONG Space-Integrated-Ground Information Networks    2022, 3 (3): 72-80.   DOI: 10.11959/j.issn.2096-8930.2022034 Abstract （241）   HTML （24）    PDF（pc） （1866KB）（401）       Knowledge map    Save Low earth orbit (LEO) satellites play an important role in the communication of earth observation and wide area coverage because of their advantages of short transmission delay and low deployment cost.Due to limited size and weight of LEO satellite platform, the function of each LEO satellite node is relatively single, which requires effi cient collaboration among various LEO satellite nodes to form a high-performance satellite network with decentralized functions and converged capabilities.It puts forward certain requirements for network service management.Aiming at the cooperative scenario that remote sensing satellites migrate observated task data to LEO satellite constellation with mobile edge computing (MEC) service deployed, the MEC service management model based on software defi ned network in LEO satellite networks was studied, a cross-slot task migration optimization method with the aid of time extended graph was proposed.The simulation results showed that the task migration optimization method could eff ectively reduced the cost of observation satellite processing tasks.And it could off ered the management model for LEO satellite networks that deployed MEC servers. Table and Figures | Reference | Related Articles | Metrics Select Network Capability Exposure Scheme in Satellite and Ground Merged Network Lin LIN, Bin ZHU, Zelin WANG, Guangquan WANG, Jianwei HE, Haipeng YAO Space-Integrated-Ground Information Networks    2022, 3 (3): 81-86.   DOI: 10.11959/j.issn.2096-8930.2022035 Abstract （215）   HTML （31）    PDF（pc） （954KB）（363）       Knowledge map    Save Facing the issue of the integration capability opening of terrestrial 5G network and satellite communication network fusion architecture, first the research status of 5G and satellite communication fusion at home and abroad was introduced.Then a layered architecture for consistent capability opening under the fusion architecture of satellite and terrestrial 5G networks was proposed.Finally, the open requirements, feasible architecture and application scheme of consistent capability under the fusion architecture of satellite and terrestrial 5G networks was discussed.Through the proposed capability opening scheme based on the integration of 5G and satellite communication network, on the one hand, the capability invocation path of satellite communication network and terrestrial 5G network was connected, and 5G capability was extended to the application in the fi eld of satellite communication.On the other hand, the platform provided technical reference for satellite management system information for 5G capability decision-making and 5G network capability for satellite link selection. Table and Figures | Reference | Related Articles | Metrics Select Simulation System of Space-Air-Ground Integrated Micro-Service New Network Architecture in 6G Junyi YANG, Fandi PEI, Zhaolong XU, Zhenyu XIAO Space-Integrated-Ground Information Networks    2022, 3 (3): 87-96.   DOI: 10.11959/j.issn.2096-8930.2022036 Abstract （283）   HTML （43）    PDF（pc） （2744KB）（373）       Knowledge map    Save The space-air-ground integrated network is the inevitable trend of 6G development in the future.A set of verifi cation simulation system was designed and set up for the micro-service new network architecture of space-air-ground integrated network in 6G.A four-layer simulation system architecture was proposed, included access user layer, radio unit-distributed unit (RU-DU) layer, NFV case management layer and micro-service network element layer.The whole process of network topology establishment, user registration, session establishment and communication case simulation could be realized, which embodied the function of service-oriented network element.Three basic simulation communication cases, namely communication between users, handover management and session management, were designed, and the feasibility of the new network architecture was verifi ed by the handover management case, which laid the engineering foundation for the iterative evolution of network architecture. Table and Figures | Reference | Related Articles | Metrics Select Survey of Low Earth Orbit Satellite Communication Network Routing Technology Shuang ZHENG, Xing ZHANG, Wenbo WANG Space-Integrated-Ground Information Networks    2022, 3 (3): 97-105.   DOI: 10.11959/j.issn.2096-8930.2022037 Abstract （743）   HTML （159）    PDF（pc） （921KB）（992）       Knowledge map    Save Low earth orbit satellite communication network is an important part of the internet of everything era, but the characteristics of satellite constellation topology such as high dynamic, limited heterogeneous resources and unbalanced network service capacity make the traditional routing protocol applied to the ground network no longer suitable for low earth orbit satellite network.In this regard, scholars at home and abroad had carried out extensive research on low-orbit satellite routing technology.Firstly, the research status of low-orbit satellite routing was discussed from inter-satellite routing and satellite-to-ground routing, and the inter-satellite routing technologies with business as the core and topology as the core were compared in detail.On this basis, the key problems faced by low-orbit satellite routing strategies were analyzed, namely, high dynamic network topology, large inter-satellite link propagation delay, uneven network load and limited on-board resources.The future research of routing technology was prospected accordingly. 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