[논문 리뷰] A Survey on Cellular-connected UAVs: Design Challenges, Enabling 5G/B5G Innovations, and Experimental Advancements

Debashisha Mishra, Enrico Natalizio|arXiv (Cornell University)|2020. 05. 02.

UAV Applications and Optimization참고 문헌 168인용 수 152

한 줄 요약

본 논문은 5G/B5G 내의 셀룰러에 연결된 UAVs(UAVs as aerial UEs로 보는 관점)를 조사하고, 통합 과제, 5G 혁신, 테스트베드 및 사회경제적 고려사항을 개요로 제시한다.

ABSTRACT

As an emerging field of aerial robotics, Unmanned Aerial Vehicles (UAVs) have gained significant research interest within the wireless networking research community. As soon as national legislations allow UAVs to fly autonomously, we will see swarms of UAV populating the sky of our smart cities to accomplish different missions: parcel delivery, infrastructure monitoring, event filming, surveillance, tracking, etc. The UAV ecosystem can benefit from existing 5G/B5G cellular networks, which can be exploited in different ways to enhance UAV communications. Because of the inherent characteristics of UAV pertaining to flexible mobility in 3D space, autonomous operation and intelligent placement, these smart devices cater to wide range of wireless applications and use cases. This work aims at presenting an in-depth exploration of integration synergies between 5G/B5G cellular systems and UAV technology, where the UAV is integrated as a new aerial User Equipment (UE) to existing cellular networks. In this integration, the UAVs perform the role of flying users within cellular coverage, thus they are termed as cellular-connected UAVs (a.k.a. UAV-UE, drone-UE, 5G-connected drone, or aerial user). The main focus of this work is to present an extensive study of integration challenges along with key 5G/B5G technological innovations and ongoing efforts in design prototyping and field trials corroborating cellular-connected UAVs. This study highlights recent progress updates with respect to 3GPP standardization and emphasizes socio-economic concerns that must be accounted before successful adoption of this promising technology. Various open problems paving the path to future research opportunities are also discussed.

연구 동기 및 목표

• Classify and map the applications and use cases for cellular-connected UAVs within 5G/B5G.
• Analyze design challenges and technical requirements for integrating UAVs as aerial UEs in cellular networks.
• Highlight 5G/B5G architectural innovations, network virtualization, and practical prototyping efforts for UAV connectivity.
• Summarize ongoing standardization, regulatory, and socio-economic considerations affecting adoption.

제안 방법

• Review and synthesize existing literature on UAV-cellular integration with emphasis on the cellular-assisted UAV paradigm.
• Present a taxonomy of UAV applications and use cases enabled by cellular connectivity.
• Discuss 3D coverage, UAV-ground channel characteristics, mobility, and interference management relevant to UAVs in cellular networks.
• Survey 5G/B5G innovations and their applicability to UAV connectivity, including testbeds and field trials.
• Outline standardization activities and socio-economic factors shaping deployment.

실험 결과

연구 질문

• RQ1 What are the main application domains and use cases for cellular-connected UAVs in 5G/B5G networks?
• RQ2 What are the key integration challenges (coverage, channel models, interference, mobility) for UAVs operating as aerial UEs?
• RQ3 Which 5G/B5G innovations (architecture, virtualization, slicing, PHY improvements) most impact cellular-connected UAVs?
• RQ4 What is the status of experimental prototyping, field trials, and testbeds for UAV connectivity in cellular networks?
• RQ5 What standardization, regulatory, and socio-economic issues must be addressed for widespread adoption?

주요 결과

• UAVs can function as flying base stations, relays, or aerial UEs to extend cellular network capabilities.
• Cellular-connected UAVs enable BVLoS operations leveraging licensed spectrum, with potential for reliable, low-latency connectivity.
• 3D coverage models, UAV-ground channels, and interference management are critical design considerations.
• 5G/B5G innovations such as network virtualization, network slicing, MEC, and PHY improvements are relevant to UAV connectivity.
• There are active experimental testbeds and field trials illustrating prototyping progress and gaps between theory and deployment.
• Standardization, regulatory, and socio-economic factors are pivotal for adoption of cellular-connected UAVs.