6th generation (6G) communication research is currently focusing on non-terrestrial networks (NTNs) to promote ubiquitous and ultra-high-capacity global connectivity. Specifically, multi-layered hierarchical networks, i.e., the orchestration among different aerial/space platforms, including Unmanned Aerial Vehicles (UAVs), High Altitude Platforms (HAPs), and satellites co-operating at different altitudes, currently represents one the most attractive technological options to solve coverage and latency constraints associated with the NTN paradigm. However, there are still several issues to be resolved for proper network design. In our work, we evaluate the performance of different multi-layered non-terrestrial configurations, and then provide guidelines on the optimal working point(s) for which it is possible to achieve a good compromise between improved system flexibility and network performance, with respect to a baseline standalone deployment.

中文翻译：

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6G 多层分层非地面网络的潜力

第六代 (6G) 通信研究目前侧重于非地面网络 (NTN)，以促进无处不在和超高容量的全球连接。具体而言，多层分层网络，即不同空中/空间平台之间的编排，包括无人机（UAV）、高空平台（HAP）和不同高度合作的卫星，是目前最具吸引力的技术之一。解决与 NTN 范例相关的覆盖和延迟约束的选项。然而，为了正确的网络设计，仍有几个问题需要解决。在我们的工作中，我们评估了不同多层非地面配置的性能，