Space-Integrated-Ground Information Networks

Network Architecture and Key Technologies for the Integrated Satellite and Terrestrial Mobile Communication System

Hui XU, Deshan MIAO, Shaoli KANG, Shaohui SUN

2020, 1(2): 2-10. doi:10.11959/j.issn.2096-8930.20200201

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The fl exible and reconfi gurable network architecture for the integrated satellite and terrestrial mobile communication system was proposed based on analyzed the scenarios and requirements.And the integrated satellite and terrestrial mobile communication system could realized the reconstruction of network functions and ensured the deterministic service capability of the network.A unifi ed transmission mechanism and the mobility management mechanism for the integrated satellite and terrestrial mobile communication system was proposed to realized efficient transmission and improved network resource management effi ciency.

Communication and Security Integrated Space-Earth Heterogeneous Network Architecture

Xiaoning ZHANG, Lidong ZHU

2020, 1(2): 11-16. doi:10.11959/j.issn.2096-8930.20200202

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To achieve the integration of space information networks and high-speed rail, ship and civil aviation private communication networks, this article proposes to leverage the mechanism of identifi er and locator separation to construct the communication and security integrated space-earth heterogeneous network architecture.The proposed network architecture included four network layers (i.e., space-earth heterogeneous network service layer, space-earth heterogeneous network traffi c layer, space-earth heterogeneous network routing layer and space-earth heterogeneous network access layer) and fi ve network identifi ers (i.e., service identifi er, traffi c identifi er, routing identifi er, access identifi er and host identifi er).With the method of effi cient network identifi er mapping, the communication and security integrated requirement for space information networks and ground private communication networks could be guaranteed.

Spatial Computing Interconnection Network Architecture Based on Hybrid Orbit Networking

Jianping HU, Jie SUN, Huizhong XU, Ting LI

2020, 1(2): 17-21. doi:10.11959/j.issn.2096-8930.20200203

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In view of the current development trend of building a unifi ed, integrated, and hybrid orbital space information network in various countries around the world, as well as the ineffi ciency and delay caused by the existing satellite systems relying on ground information processing, a space computing interconnection network architecture based on hybrid orbital networking was proposed, which unifi ed the existing separate satellite networks in a set of architecture, integrated the existing satellite networks through inter satellite links and on-satellite processing to realize the interconnection and effi cient processing of the entire space information network.It made the future space network not only a channel for information, but also a platform for information processing, improved the information processing capacity and operating effi ciency of the spatial information network, and meet the needs of a large number of node information interaction and processing between the world and the earth in the future.

Research on Space-Based Integrated Internet of Things Architecture and Interference Analysis

Gengxin ZHANG, Xiaojin DING, Zhicheng QU

2020, 1(2): 22-33. doi:10.11959/j.issn.2096-8930.20200204

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Considering “internet of everything” of the future internet of things (IoT), the space-based integrated IoT architecture was designed, and the interference scenarios of the coexistence of satellite and ground was analyzed, with the aid of analyzing the architectures of the spatial information network and space-based access network.Specifi cally, fi rstly, relying on both the integration of satellite network and ground network, and the advanced design concept of decoupling control and data, a spacebased satellite IoT architecture was designed in the presence of the specifi c characteristics of access network and terminals, which included space-based backbone network, space-based access network, ground-based IoT, core network and multimodal IoT terminals.Moreover, the process of space-based control plane was also given.Secondly, interference analysis was carried out for satellite spectrum sharing scenario and satellite-ground spectrum sharing scenario respectively, and preliminary analysis results were presented.

SDN-Based Satellite Networks:Progress, Opportunities and Challenges

Dan YANG, Jiang LIU, Ran ZHANG, Fangqi LIU, Man OUYANG, Tao HUANG, Yunjie LIU

2020, 1(2): 34-41. doi:10.11959/j.issn.2096-8930.20200205

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The current research status of SDN-based satellite communication networks was investigated, the SDN-based satellite communication network architecture and related key technical solutions was introduced and discussed; The opportunities and challenges faced by SDN-based satellite networks were discussed.

Multiple Addressing Coordination and Switching Technology in Space-Integrated-Ground Information Network

Wenlan DIAO, Jianping AN, Yu ZHANG, Han HU

2020, 1(2): 42-47. doi:10.11959/j.issn.2096-8930.20200206

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The construction requirements and deployment status of the space-integrated-ground integrated information network was analyzed, and the diffi culties in the integration of satellite network and internet was discussed.To tackle the problems of complex network structure, high dynamic topology, diffi cult data compatibility and limited satellite resources, a multi addressing coordination and switching technology based on IP address, ID identifi cation and content name was proposed.In particular, a multi addressing datagram format was designed, and the multi addressing route forwarding mechanism was extended.It could realized the interconnection of heterogeneous networks, the stability of mobile communication, the compatible switching of polymorphic data, and the effi cient routing with low power consumption of satellites.

Research on In-Network Caching Mechanisms for Space-Integrated-Ground Content Delivery Service

Yang CAO, Yufeng ZHU, Junfeng LV, Tao JIANG, Peng GAO, Dongchen ZHANG

2020, 1(2): 48-56. doi:10.11959/j.issn.2096-8930.20200207

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In view of the problem of satellite mobility and terrestrial network resource constraints, a pre-placement strategy for terrestrial network content based on named data networking was proposed; Then, local content requests under the coverage of multiple base stations was fully considered.Based on the diff erence in distribution, a content distribution strategy based on fairness in satellite networks was proposed.The numerical results showed that the proposed content pre-placement strategy was eff ective in terms of satellite network content injection.In addition, in terms of satellite network content distribution, the proposed fair-based content distribution strategy could maximized content satisfaction.

Traffic Prediction of Space-Integrated-Ground Information Network Based on Improved LSTM Algorithm

Chengsheng PAN, Yufu WANG, Li YANG

2020, 1(2): 57-65. doi:10.11959/j.issn.2096-8930.20200208

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The space-integrated-ground information network is easy to interrupt and the traffi c fl uctuation is not stable due to the problems of high traffi c burst and topological time-varying, which makes the traffi c prediction diffi cult much higher than the ground.In order to solve this problem, an improved LSTM algorithm was put forward.Firstly, the traffi c autocorrelation was judged by analyzd the infl uence of the lag variable of traffi c sequence on the predicted value; Secondly, the noise and breakpoint of the training set were eliminated by replacing the interruption with the predicted value; Finally, Dropout algorithm was used to reduce the impact of noise and neural network over fi tting, and accurately predict the traffi c data of the integrated intelligent network.The simulation results showed that in OPNET simulation environment, compared with other algorithms, the accuracy of this algorithm was improved by 59.21%, and the training speed of the algorithm was improved by 11.11%, which could provide eff ective data support for the overall scheduling of the integrated intelligent network.

Space-Terrestrial Integrated Multi-Identifier Network with Endogenous Security

Guohua WEI, Hui LI, Yongjie BAI, Gengxin LI, Kaixuan XING

2020, 1(2): 66-72. doi:10.11959/j.issn.2096-8930.20200209

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A novel network architecture, named space-terrestrial integrated multi-identifi er network (STI-MIN) was proposed, which was suitable for the environment of space-terrestrial integrated situation.In the following passage, the fundamental theory, Space-Terrestrial integrated routing strategy, identifi er management system and endogenous security mechanism of STI-MIN were depicted.Then prototype experiment progress was summarized and the merit of STI-MIN by comparing with traditional network was analyzed.

Physical Layer Security Schemes in Space-Integrated-Ground Information Network

Fangshu MA, Yan WANG, Guowei ZHANG, Yuxin CHENG

2020, 1(2): 73-80. doi:10.11959/j.issn.2096-8930.20200210

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Firstly, the current mainstream technologies of physical layer security were summarized and the relevant technical indicators were introduced; Then, the research on physical layer security in three typical scenarios of the space-integrated-ground information network was summarized; Finally, problems need to be solved for the physical layer security of the three typical scenarios were proposed, and feasible schemes were discussed.

Design Conception and Simulation of Space Information Network Structure Based on Community Structure

Zhongmin PEI, Lintao REN, Wei XIONG, Zhangkai LUO

2020, 1(2): 81-86. doi:10.11959/j.issn.2096-8930.20200211

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Focusing on the integrated development of satellite business, based on the idea of clustering and complex network theories and methods, a design concept of space information network structure based on community structure was proposed and a virtual network with 237 nodes in 6 communities was generated with STK software.Serval static parameters such as degree distribution, betweenness, and clustering coeffi cient in the network were analyzed.The connection rules and structural characteristics of the space information network were revealed.

Network Planning Method and Simulation Analysis for Large-Scale Low Earth Orbit Satellite Constellation Networks

Lixiang LIU, Shuaijun LIU

2020, 1(2): 87-94. doi:10.11959/j.issn.2096-8930.20200212

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Thanks to the advantages of global coverage, high capacity and low latency, the large-scale LEO satellite constellation networks has become a hot spot for global development.However, planning methods and simulation modeling research for LS-LEOSCN has not been well studied.This paper focused on the following two issues, namely how to evaluate a given LSLEOSCN, and how to design or optimize a constellation network.Three key indicators for evaluating the performance of LSLEOSCN were established, namely network coverage (CT), system throughput (ST) and round-trip time (RTT).Further, the satellite constellation deployment (SCD), gateway station deployment (GSD) were analyzed and designed in the integrated network evaluation and planning (NEaP) platform for LS-LEOSCN.The simulation results showed that the designed NEaP platform could support the development of LS-LEOSCN evaluation and planning.

Research on Application Operation Development of Space-Integrated-Ground Information Network

Qiang MEI, Nan SHI, Yanxiao LI, Xionghong PENG, Chang JIANG

2020, 1(2): 95-102. doi:10.11959/j.issn.2096-8930.20200213

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Based on the essence of satellite internet, the development status of satellite internet industry from three aspects of evolution path, global deployment and industrial chain was introduced. The operation mode of foreign satellite internet companies. was analyzed On this basis, combined with the network characteristics of the space-integrated-ground information network, and aimed at its basic business, the operation mode of the space-integrated-ground information network was proposed. Finally, the development suggestions of the application and operation of the space-integrated-ground information network were given.

Application Analysis of Space-Based Relay in Land Resources Satellite Image Acquisition

Huibing WANG, Zuoya ZHENG, Sida OUYANG, Yue ZHANG, Chao YANG, Yu HUANG

2020, 1(2): 103-108. doi:10.11959/j.issn.2096-8930.20200214

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With the analysis of the main factors aff ecting the image acquisition of land remote sensing satellite, the satellite image data transmission application mode based on space-based relay was proposed to solve the bottleneck problem of satellite-ground receiving.Through simulation analysis and quantitative calculation, the application eff ect of relay transmission was calculated.The results showed that relay transmission could improved the visible time of satellite data receiving, thus greatly improved the total amount of image acquisition, and eff ectived perform the satellite operation effi ciency.

Development of Electrically Controlled Liquid Crystal Phased Array Antenna

Wei XIU, Guang YANG, Haiyan TIAN, Chen PANG, Yongzhen LI, Xuesong WANG

2020, 1(2): 109-115. doi:10.11959/j.issn.2096-8930.20200215

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The technical background of EM metamaterials was introduced, the development history and working mechanism of electrically controlled LC technology, the latest developments in the research and application of electrically controlled LC phased array antenna were illustrated.The electrically controlled LC phased array antenna’s advantages and disadvantages were summarized.Finally, the future prospect of LC metamaterials in the fi eld of EM metamaterials was expounded.

Design of Multimodal Transport Information Service System Based on Space-Based Internet of Things

Yangyang LU, Guangyue XUE, Hanchang SUN, Qingxia XIE

2020, 1(2): 116-120. doi:10.11959/j.issn.2096-8930.20200216

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With the statement of container multimodal transport development tendency and network bottleneck hindering information and intelligence evolution, an open, neutral, safe, and credible multimodal transport information service platform based on spaced internet of things and big data technologies was introduced.This platform can provide container tracking, supervision and other comprehensive application services for diff erent freighters such as railway, road, water and air transportation etc., effectively improving the efficiency of multimodal transport service.The platform will bring vital economic and social benefi ts and provide support for establishing modern logistics system.

Discussion on Disaster Remote Sensing Application Service Based on Ground Information Port

Qiao HU, Zuoya ZHENG, Gang LIU, Linyao QIU, Yanfeng WU

2020, 1(2): 121-127. doi:10.11959/j.issn.2096-8930.20200217

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Aim at the problems of large volume and low degree of sharing of remote sensing data, high complexity of algorithm model and single function of disaster response application system, the main functions and technical framework of GIP, as well as the advantages and potential of GIP in platform, algorithm and application system was introduced.It provided a reference for further mining the research of new intelligent processing algorithm and processing mode for multi-source, high-dimensional, heterogeneous and complex associated earth observation data in other application fi elds with GIP, so as to promote the service ability and form a new information service mode and industrial chain of the GIP.

Design and Implementation of Global Flight Tracking System Based on Space-Based Network

Bin LUO, Junjie CHEN, Kai CUI

2020, 1(2): 128-134. doi:10.11959/j.issn.2096-8930.20200218

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Based on the analysis of the application scenarios and requirements of the global fl ight tracking of space-based network, aim at the application characteristics of the satellite network in the field of civil aviation, the overall system and subsystem preliminary design, key technology analysis, business focus and difficulty analysis were carried out, the global flight tracking prototype system construction and test verifi cation was completed.The results showed that the system is stable and reliable, the fl ight path is complete, and meets the requirements of 4D/15 fl ight tracking and surveillance.The future application in the industry will play an important role in improving the aviation security system, and ensuring the information and data security of civil aviation.

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