Non-terrestrial networks (NTN) offer potential for efficient content broadcast in remote regions, thereby extending the reach of digital services. In this paper, we introduce a novel approach to optimize wireless edge content placement using NTN. Specifically, we dynamically select content for placement via NTN links based on popularity and suitability for delivery through NTN, while considering the orbital motion of LEO satellites. Our comprehensive system-level case studies, based on a practical LEO constellation, demonstrate the significant improvement in placement speed compared to existing methods that neglect network mobility. We further show that the advantages of NTN links over standalone wireless TN solutions are more pronounced in the early stages of content delivery and are amplified by higher content popularity correlation across geographical regions.

翻译：非地面网络（NTN）为偏远地区的高效内容广播提供了潜力，从而扩展了数字服务的覆盖范围。本文提出了一种利用非地面网络优化无线边缘内容布局的新方法。具体而言，我们根据内容的流行度以及通过非地面网络传输的适宜性，动态选择通过非地面网络链路放置的内容，同时考虑低地球轨道卫星的轨道运动。基于实际低地球轨道卫星星座的综合系统级案例研究表明，与忽略网络移动性的现有方法相比，本方法在放置速度上实现了显著提升。我们进一步证明，非地面网络链路相对于独立无线地面网络解决方案的优势在内容交付的初期阶段更为显著，且随着地理区域间内容流行度相关性的增强而放大。