It is crucial to deploy temporary non-terrestrial networks (NTN) in disaster situations where terrestrial networks are no longer operable. Deploying uncrewed aerial vehicle base stations (UAV-BSs) can provide a radio access network (RAN); however, the backhaul link may also be damaged and unserviceable in such disaster conditions. In this regard, high-altitude platform stations (HAPS) spark attention as they can be deployed as super macro base stations (SMBS) and data centers. Therefore, in this study, we investigate a three-layer heterogeneous network with different topologies to prolong the lifespan of the temporary network by using UAV-BSs for RAN services and HAPS-SMBS as a backhaul. Furthermore, a two-layer clustering algorithm is proposed to handle the UAV-BS ad-hoc networking effectively.

翻译：在陆地网络无法运行的情况下，部署临时非地面网络（NTN）至关重要。部署无人机基站（UAV-BS）可提供无线接入网络（RAN）；然而，在灾害条件下，回程链路也可能受损且不可用。对此，高空平台站（HAPS）因其可部署为超级宏基站和数据中心而备受关注。因此，本研究探讨了一种具有不同拓扑结构的三层异构网络，通过将UAV-BS用于RAN服务以及将HAPS-SMBS用于回程，来延长临时网络的生命周期。此外，提出了一种两层聚类算法，以有效处理UAV-BS的自组织网络连接问题。