面向源路由约束的全球导航卫星系统链路分析

未来的全球导航卫星系统GNSS （global navigation satellite system）的发展趋势是把导航和通信有机合理的结合在一起,使得导航系统中的卫星结点组成网络并实现网内结点间的数据交换,而这种网内卫星结点的通信主要为实现导航系统的自主导航或减少系统对于地面站的依赖提供支撑.为了研究路由的卫星导航网络特性,参照国内外真实的系统和研究成果提出了3种具有全连通性质的永久星间链路的建立方式,给出了不同建立方式下星间链路的距离、俯仰角和方位角的时变特性,结合这些特性分析了是否满足路由策略的要求,给出了在导航星座网络中的可行性分析以及初步的路由策略考虑,总结了全球导航卫星系统路由策略的优缺点,最后对全文进行总结.

Analysis of Global Navigation Satellite System Links Oriented to Source Routing Restraints

The trend of global navigation satellite system (GNSS) is the combination of navigation and communication, connecting navigation system nodes into a network and exchanging data between the nodes, navigating autonomously by communication between the nodes, and reducing the dependence of ground stations on the navigation system. This paper proposes an analysis method of routing selection restraints. In order to study the characteristics of the satellite navigation network for source routing, it provides three kinds of permanent inter satellite links(ISLs) referring to the real systems and researches on domestic and foreign basis, gives those different ISLs characteristics in terms of distance, elevation angle and azimuth, analyzes whether these characteristics meet the requirement of source routing strategy, discusses the feasibility of source routing in the satellite navigation network and initial routing strategy considerations, and sums up the advantages and disadvantages of source routing strategy. Finally, a summary of this paper is given.