Optical satellite network (OSN) plays an important role in broadband applications of space-based information. For OSNs, the premise of data transmission and routing is allocating wavelength resource. However, the dynamic characteristics of OSNs, i.e., intermittent link connection and time-varying topology make it difficult to estimate wavelength requirements in OSNs. In this letter, we study wavelength multiplexing in intermittent optical inter-satellite links and present a method based on space-time evolving graph to estimate required wavelengths in dynamic OSNs. Some indicators are proposed to represent topology variation and numerical simulations have been conducted to investigate impacts of topology variation on wavelength requirements.

中文翻译：

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动态光卫星网络波长需求分析方法

光卫星网络（OSN）在天基信息的宽带应用中发挥着重要作用。对于OSN，数据传输和路由的前提是分配波长资源。然而，OSN 的动态特性，即间歇性链路连接和时变拓扑，使得估计 OSN 中的波长需求变得困难。在这封信中，我们研究了间歇性光卫星间链路中的波长复用，并提出了一种基于时空演化图的方法来估计动态 OSN 中所需的波长。提出了一些指标来表示拓扑变化，并进行了数值模拟以研究拓扑变化对波长要求的影响。