基于星间链路的全球短报文服务可用性分析  

Analysis of global short message service availability based on inter-satellite link

作　　者：田露 李骏平 刘蕾 TIAN Lu;LI Junping;LIU Lei(The 15th Research Institute of China Electronic Technology Corporation,Beijing 100083,China)

机构地区：[1]中国电子科技集团公司第十五研究所,北京100083

出　　处：《中国空间科学技术（中英文）》2024年第5期166-174,共9页Chinese Space Science and Technology

摘　　要：在北斗全球短报文的传输过程中,星间链路网络在其中起到重要的作用,在系统运行过程中或太空对抗中可能发生星座一个或多个节点故障,势必影响全球短报文系统的服务可用性。针对北斗短报文业务和星间链路的传输特性,设计了基于星间链路的全球短报文仿真分析方法,设计了20个不同的星座故障场景,对仿真数据进行整理,统计不同场景不同时间的短报文服务受损情况。结果表明,当短报文载荷故障卫星总数小于或等于2时,对短报文服务区域几乎无影响,当短报文载荷卫星故障数在3~6时,服务区域损失在10%以内,说明在少量卫星故障下,仍能保持较高的服务可用性,基于星间链路的全球短报文系统具有较好的稳健性。The inter-satellite link network plays an important role in BeiDou global short message system,one or more nodes of the constellation may fail during system operation or space confrontation,which will affect the availability of the global short message system.According to the characteristics of BeiDou short message service and inter satellite link,a global short message simulation analysis method based on inter satellite link is designed,20 different constellation fault scenarios are designed,and the loss of short message service in different scenarios and at different time is counted.The results show that when the total number of failed satellites in the short message payload is less than or equal to 2,there is almost no impact on the short message service area.When the number of failed satellites in the short message payload is 3-6,the loss of service area is less than 10%,which indicates that the global short message system based on the inter satellite link can still maintain high service availability with a few satellite failures.

关 键 词：北斗卫星 全球短报文 星间链路 故障仿真 服务可用性 

分 类 号：V57[航空宇航科学与技术—航空宇航推进理论与工程] TP3[自动化与计算机技术—计算机科学与技术]