双层混合卫星网络优化设计及覆盖性能评估

摘要

针对单层卫星网络抗毁能力差、处理时延高以及三层卫星网络管理复杂、链路冗余度高等问题,分别采用Walker星座和极轨星座对MEO和LEO卫星进行了组网分析和星座设计,提出了一种双层混合卫星网络优化设计方案;同时,针对传统卫星覆盖性能指标不能统一评价不同构型卫星星座的问题,提出了一种基于层次分析法模型的不同构型卫星星座统一评估模型.仿真结果表明,所提出的方案不仅能够很好地提升对中国区域的覆盖率,而且可以有效地降低平均间隙时长和平均响应时间,从而满足对中国地区全天时覆盖的总体设计要求.%We have studied the issues that poor survivability and high processing delay of single-layer satellite networks,and complex management and high link redundancy of triple-layer satellite networks,and propose an optimal design scheme of double-layer hybrid satellite network.In our proposed scheme,the networking analysis and constellation design for MEO and LEO satellites have been presented by using Walker constellation and polar orbit constellation respectively.Meanwhile,aiming at the problem that the traditional satellite coverage performance index cannot be used to evaluate the satellite constellation with different configurations generally,a unified evaluation model of satellite constellation is proposed based on Analytic Hierarchy Process(AHP).Simulation results show that the proposed scheme can not only improve the percentage of coverage,but also effectively reduce the average gap duration and average response time,so then meet the overall design requirements for all-day coverage in China.