(POSTER) Advancing Non-Terrestrial Networks for Critical Scenarios with the RAIN4C Framework

The transition to sixth-generation (6G) wireless networks underscores the importance of reliable network services in critical scenarios, such as post-disaster and rural areas. Space-Air-Ground Integrated Networks (SAGINs), which include satellite systems, aerial networks, and terrestrial communication, are crucial for global coverage in these contexts. Despite their potential, satellite network latencies and the dynamic nature of Unmanned Aerial Systems (UAS) present challenges that diverge from 6G requirements. This paper introduces RAIN4C, a multi-layer framework that integrates hybrid communication and computation solutions across satellite, aerial, and ground segments. RAIN4C focuses on reliable connectivity, energy-efficient computation, and effective caching to address the key issues of deploying SAGIN systems. It proposes methods for optimizing these functionalities and evaluates them through simulations and a test-bed involving satellite links and UAVs. The goal is to enable swift deployment of SAGIN systems for on-demand services in critical environments, aligning with the needs of future wireless networks.