Opt Express. 2023 Feb 27;31(5):8682-8695. doi: 10.1364/OE.486124.
Low earth orbit satellite laser communication has become an important part of communications due to its large capacity and low latency. The lifetime of the satellite mainly depends on the recharge and discharge cycles of the battery. The low earth orbit satellites frequently recharge under sunlight and discharge in the shadow, which leads satellites to age quickly. This paper studies the energy-efficient routing problem for satellite laser communication and builds the satellite ageing model. Based on the model, we propose an energy-efficient routing scheme based on the genetic algorithm. Compared with shortest path routing, the proposed method improves the satellite lifetime by about 300%, and the performances of the network are only slightly degraded, the blocking ratio increases by only 1.2%, and the service delay increases by 1.3 ms.
低地球轨道卫星激光通信因其大容量和低延迟而成为通信的重要组成部分。卫星的寿命主要取决于电池的充放电循环。低地球轨道卫星经常在阳光直射下充电，在阴影中放电，这导致卫星老化速度很快。本文研究了卫星激光通信的节能路由问题，并建立了卫星老化模型。基于该模型，我们提出了一种基于遗传算法的节能路由方案。与最短路径路由相比，该方法将卫星的寿命提高了约 300%，而网络的性能仅略有下降，阻塞率仅增加 1.2%，服务延迟仅增加 1.3ms。
