# Unmanned Autonomous Intelligent System in 6G Non-Terrestrial Network
## 3 UAV-Assisted Non-Terrestrial Networks
### Unmanned Aerial Vehicles Application in NTNs  
With the assistance of NTN communication, UAVs are capable of supporting a variety of tasks, including material delivery, air traffic control, and disaster relief operations. (1) DeliveryReference [67] proposed a vaccine delivery scheme called SanJeeVni, which utilized blockchain and 6G communication in vaccine delivery to ensure trusted logistics within strict delivery time constraints. The scheme proposes a UAV swarm network in which the delivery trajectory design and motion control of a UAV swarm are achieved through intelligent edge computing. With 6G-empowered eRLLC (Extremely Reliable and Low-Latency Communications) technology, the flight time of UAVs was strictly limited, ensuring timely delivery of vaccines to users in need. Furthermore [68], introduced a blockchain-based secure drone delivery system for medical equipment logistic missions using ground-based station networks. (2) UAV traffic management  
With the development of 5G/B5G communication technology, UAV traffic management (UTM) has recently garnered significant attention from research scientists [69; 70; 71]. This is due to the dramatic evolution of UAV applications such as parcel delivery, precise agriculture, and survey mapping, which usually operate beyond the visual line of sight mode. As a result, efficient and secure traffic management is urgently required. In the future, UAV traffic will become even denser and busier, making UTM essential for coordinating multiple autonomous UAVs beyond the visual line of sight (BVLoS) in complex UAV traffic environments. The UTM requires an efficient communication backup to handle complex airborne communication in environments with heavy air traffic, as opposed to relying on existing cellular networks for terrestrial communication. Researchers in [70] introduced a 6G-enabled UTM paradigm in a highly dense and urban air traffic scenario emphasizing non-terrestrial communications, including aerial and satellite communication. (3) Disaster Relief and Management:Communication reconstruction is crucial in disaster relief scenarios because road destruction, power interruptions, and the paralysis of terrestrial base stations will isolate the affected area, leading to an \"information island\" phenomenon. Unmanned aerial vehicles are extensively utilized in disaster scenarios to offer communication coverage for ground user equipment (UE), including affected residents and first responder rescue teams, when ground network infrastructure is disconnected from the power supply or destroyed by sudden disaster events [72; 73; 74; 75]. UAVs employed as aerial communication nodes are essential for disaster management, facilitating communication recovery and information exchange. In reference [72], a proposal for stochastic geometry-based UAV-assisted wireless communication in disaster scenarios was presented, considering partial ground failure. Furthermore [73], investigated an aerial communication scheme utilizing multi-UAVs for multi-purpose disaster relief operations, with a focus on device-to-device communication and energy efficiency. Moreover [74], examined the fairness of service provision in a post-disaster millimeter-wave communication system. Researchers [75] highlighted the topological challenges in UAV-assisted communication during post-disaster rescue operations. Figure 4 illustrates a real-world scenario of wildfire detection and early warning in mountainous regions. A group of unmanned helicopters equipped with 5G base stations and mesh communication payloads is deployed to provide network coverage for firefighters in mountainous areas. Images containing fire point information, collected via optical and thermal sensors on board the UAVs, are then transmitted to the ground command truck via a UAV 5G network. After image processing and recognition, fire point locations are distributed to individual firefighters via the non-terrestrial 5G network and displayed on their helmet-mounted AR devices or cellphones.