基于LEO的骨干接入空间信息网络与用频策略研究  

Researcn on Space Information Network Architecture Based on LEO Satellites for Backbone Access and Frequency Resolution Strategy

作　　者：刘俊峰 李飞龙 杨杰[3] LIU Jun- feng1 ,LI Fei -long2, YANG Jie(1School of Information Science and Engineering,Central South University,Changsha 410017,China;2Unit 31006 of PLA,Beijing 100013,China;3Unit 75841 of PLA,Changsha 410126,Chin)

机构地区：[1]中南大学信息科学与工程学院,长沙410017 [2]中国人民解放军31006部队,北京100013 [3]中国人民解放军75841部队,长沙410126

出　　处：《计算机科学》2018年第B06期337-341,共5页Computer Science

摘　　要：空间信息网络利用各类空间平台来实现空间信息的实时获取、传输和处理,打破了当前多个独立系统之间资源不能共享的壁垒。立足我国空间基础设施种类繁杂、不成体系、缺少统一的通信标准、综合服务能力差、覆盖范围小的建设现状,坚持"既着眼于现有系统,又兼顾未来发展"的建设原则,在空间信息网络建设的初级阶段,设计了基于双层LEO的空间信息网络的体系架构,即将较高轨道的LEO卫星作为骨干核心网来负责骨干传输功能;将较低轨道的LEO卫星作为热点接入层来负责地面和空间业务节点的接入。同时,为未来空间信息业务提供可扩展的体系特征,譬如未来增加对GEO骨干节点的拓扑关系的考虑,从而解决空间信息网络的轨道资源问题。最后,针对空间信息网络频率资源受限的问题,提出了频率获取策略。Space information network（SIN）utilizes various spatial platforms to achieve spacial information real-time acquisition,transmission and processing,which breaks the barrier of multiple independent systems incapable sharing resources.Based on the current situation of complex types,fragmentation,lacking of unified communications,poor integrated services and small-coverage for our national space infrastructure,this paper proposed the construction principles of not only focusing on the existing system but also taking into account the future development.A novel SIN architecture based on the double layered LEO was designed during the initial stage of SIN.The higher LEO satellites regarded as the backbone core network play the role of backbone transmission task,while the lower LEO satellites regarded as the hot access network provides access to terrestrial and space services node.Meantime,the scalable system feature is exhibited for future space information service.For example,the topological relations with future increased GEO backbone nodes are considered.Then,orbit resource shortages of SIN is effectively resolved.Additionally,frequency acquisition strategy is researched for the problem of limited frequency resources in SIN at the end of this paper.

关 键 词：空间信息网络 星座设计 骨干核心网 热点接入网 频率获取策略 

分 类 号：TN927[电子电信—通信与信息系统]