导航星座抗毁组网结构研究

A Destruction-Resistant Architecture's Design and Analysis of Satellite Network based on GEO/MEO Constellation

为提高整个二代导航卫星网络的抗毁性能,对其抗毁组网结构进行了研究。基于分群管理、链路冗余与修补方法,提出并设计分析了一种基于GEO星层、MEO星层以及地面节点联合组网的二代导航卫星网络组网结构,根据快照周期内位置固定的方法对星座中MEO星层进行分群管理,设计其群首的备份选择机制,以及群首MEO替代失效群管理者GEO机制,提高了星座网络的通信链路的抗毁性。通过分析二代导航卫星网络中数据传输过程与类型,设计网络结构中群内、星层以及整个二代导航星座的通信链路,特别是对星座中MEO星层的通信链路进行充分的冗余设计,启用视距范围内间隔失效卫星间次相邻卫星节点链路连接的链路设计,并同时提高了整个二代导航卫星网络的通信性能和通信容量,可以满足各种不同业务需求的数据包传输。

In order to improve destruction-resistant performance of our navigation system,networking structure of the system is studied.On the one hand,a destruction-resistant architecture of navigation system based on GEO/MEO constellation is designed and analyzed with method of redundant and modified links while the MEO layer satellites in constellations are grouped and managed based on logic position fixed in each snapshot period by combining MEO＇s logic position with location,especially the mechanism of selecting backup header of group and replacing failure group manager as GEO with group header as MEO is designed,which improves the capability of destruction-resistant in satellite constellations.On the other hand,data links among groups,satellite layers and satellite constellations especially that are among MEO layer and a pair of satellites adjacency to failure satellite each other within sight of line scope are designed by analyzing the process and type of data transfers in satellite network to improve the capability of destruction-resistant and communication and traffics in navigation system as well as to satisfy requirement on transferring many kinds of servers data packages.