基于最小跳数的星座网络拓扑抗毁性分析

Analysis of Constellation Network Topology Survivability Based on Minimum Hops

随着航天技术的发展与人类对太空的不断探索与利用,大规模低轨星座已成为国内外航天领域的重要热点。星座网络拓扑分析研究对星座运维管控、网络协议开发、业务能力评估等具有重要意义。为评估星座网络拓扑结构发生变化后依然具备网络传输能力,提出了一种基于最小跳数的星座网络拓扑抗毁性分析方法。用邻接矩阵描述星座网络拓扑,并给出邻接矩阵性质判断网络拓扑的连通性;定义最小跳数路由区域,划定网络拓扑分析范围;通过邻接矩阵性质计算节点和链路的介数值,分析部分节点和链路受损对网络拓扑的影响;对网络拓扑中失效过程进行仿真验证,证明了节点或链路的重要性以及对网络拓扑的影响关系。

With the development of space technology and the continuous exploration and utilization of space,large-scale LEO constellations have become an important hotspot in aerospace field at home and abroad.The study of constellation network topology analysis is of great significance for constellation operation and maintenance management,network protocol development,and business capability evaluation.To evaluate the network transmission capability after topology changing,this paper proposes a minimum-hop-based constellation network topology survivability analysis method.Firstly,Adjacency matrix is used to describe the constellation network topology,and the properties of adjacency matrix are given to judge the connectivity of network topology.Secondly,the minimum hop routing area is defined and the scope of network topology analysis is delineated.Then,intermediate values of nodes and links are calculated through the properties of the adjacency matrix,and the impact of some damaged nodes and links on the network topology is analyzed.Finally,simulation verification was conducted on the failure process in the network topology,demonstrating the importance of nodes or links and their impact on the network topology.