基于导航星座的天基光网络拓扑设计与仿真  

Topology Design and Simulation for Beidou-Based Space Laser Satellite Network

作　　者：王世超[1] 吴斌[1] 张若禹[1] 万鹏[1] 

机构地区：[1]北京跟踪与通信技术研究所,北京100094

出　　处：《计算机仿真》2016年第5期111-115,186,共6页Computer Simulation

摘　　要：针对北斗导航星座异轨面激光链路通信距离远、多谱勒频移严重、动态变化剧烈、影响通信定位精度的问题,提出了一种考虑通信距离和多谱勒特性的星座拓扑设计和优化方法。建立了北斗全球星座异轨星间链路运动模型,分析了多谱勒频移、多谱勒速度和多谱勒加速度的变化规律;建立了激光链路通信距离优化模型并提出了优化后的拓扑设计方案。仿真结果表明,优化后的拓扑方案能够降低通信成本,同时在保证网络通信时延性能恶化不超过4%的情况下对单星建链数量进行简化,降低了系统建设成本。仿真结果表明,上述方法是一种经济可行的星座拓扑设计方案,为空间信息传输优化提供了参考。Aiming at the long distance,severe Doppler frequency-shift,and violent dynamic change of laser-inter-satellite-links between different orbit planes,a design and optimization method for Beidou global constellation topology was proposed.A motion mathematical model for inter-satellite-links（ISLs） was established,the changing regulation of Doppler frequency-shift,Doppler velocity and Doppler acceleration was analyzed.Optimization model for ISLs＇ distance was established and an optimized topology solution was proposed.Simulation results show that the optimized topology can reduce the communication cost,and it cuts down ISLs of each satellite from 4 to 3,reducing the construction cost,on the premise that communication delay increases no more than 4%.Therefore,it＇s an economical and viable topology solution.

关 键 词：天基光网络 北斗导航星座 激光链路 多谱勒特性 拓扑设计 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]