混合星座星间链路的建立以及连通性和稳健性分析

首先,分析了混合星座的特点,并分别讨论了GEO卫星、IGSO卫星和Walker-δ星座的服务性能和星间链路的建立特点;然后,运用邻接矩阵给出混合星座连通性的判断标准,运用任意两颗卫星间相连途径的数目、割点、割边、k-连通度和k-边连通度给出星间链路稳健性的判断标准,并给出了星座达到k-连通所需要的最少星间链路的数目及其构建方式;最后,对模拟的3GEO+3IGSO+24MEO星座构型中各卫星之间的星间链路建立准则、连通性和稳健性进行了分析。

Analysis of Establishment Criteria,Connectivity and Robustness of Inter-satellite Link in Mixed Constellation

In order to improve service performance of navigation constellation,many experts consider the mixed constellation configuration of GEO satellite,IGSO satellite and MEO satellite.In the design of the new constellation configuration or the research of the existing constellation performance,the inter-satellite link(ISL) is needed to established,and the connectivity and robustness of the ISL are needed to analyze.The characteristics of the mixed constellation configuration are analyzed,and the characteristics of ISL establishment and the service performance of GEO satellite,IGSO satellite and Walker-δ constellation are discussed firstly.Then,the method to determine ISL connectivity in the mixed constellation by the adjacency matrix is put forward,and the standards of the ISL robustness are given using the number of ways between any two satellites,cutting point,cutting edge,k-connectivity degree and k-edge connectivity degree of graph theory.The minimum required number of ISLs of a k-connectivity′s constellation and the construction method of k-connectivity′s constellation are given for the first time.Finally,the 3GEO+3IGSO+24MEO constellation configuration is simulated.The criteria for ISL establishment,the connectivity and robustness of this mixed constellation configuration are studied,and many important conclusions are obtained.