低轨星座路由技术研究现状与展望

Low earth orbit constellation routing technology research status and prospect

低轨星座网络具有覆盖范围广、传输时延少、顽存能力强等优点,在宽带互联网接入服务、物联网、导航增强等方面具有重要应用。星间路由是星座网络的关键技术,直接影响其服务性能。众多学者对路由展开广泛且深入的研究。首先基于拓扑获取方式、传输数据方式、路由计算地点及计算方式等分类方法分析并归纳了低轨星座路由。其次从时间虚拟化、虚拟节点、动态拓扑更新路由以及拥塞避免角度介绍了典型路由及其改进,总结并对比了主要路由的特点,最后在此基础上提出了低轨星座路由的发展趋势。

With the advantages of wide coverage,less transmission delay,and strong stubborn,low earth orbit constellation networks have important applications in broadband internet access services,internet of things,and navigation enhancement.Inter-satellite routing is the key technology of the constellation network,which directly affects service performance.Many scholars have carried out extensive and in-depth research on routing.Firstly,we analyze and summarize the inter-satellite routing based on the classification methods of topology acquisition method,transmission data method,route calculation location,and calculation method.Secondly,the main routing and its improvement are introduced from the perspective of time virtualization,virtual nodes,dynamic routing and congestion avoidance.The characteristics of the main routing are summarized and compared.Finally,we proposed the development trend of low earth orbit constellation routing.