计算机科学 ›› 2018, Vol. 45 ›› Issue (6A): 337-341.
刘俊峰1,李飞龙2,杨杰3
LIU Jun-feng1,LI Fei-long2,YANG Jie3
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。
中图分类号:
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