Demeke Shumeye Lakew
  Quang Tuan Do
  Current network access infrastructures are characterized by heterogeneity, low latency, high throughput, and high computational capability, enabling massive concurrent connections and various services. Unfortunately, this design does not pay significant attention to mobile services in underserved areas and special events. For instance, event-based communications where vast numbers of users assemble in one location (e.g., concerts, festivals, stadiums, and squares), which require a tremendous increase in network service connections for a short time, thereby potentially overloading existing communication infrastructure. Another important case is disaster communications in which network infrastructure may be damaged or destroyed and thus rendered unable to provide service, nonetheless communication remains critical to support search and rescue (SAR) operations. From another perspective, scheduled communications may iteratively establish services as planned periodically, such as environmental sensing reports in intelligent agriculture and aerial forest surveillance. A fixed infrastructure is not necessarily suitable for such scenarios, which call for a mobile portable infrastructure instead. Finally yet importantly, sparsely populated communities (e.g., in isolated areas and at sea) especially would benefit from improved Internet access capabilities for emergency and informational communications. Thus, by leveraging the the fundamental advantage of aerial networking infrastructures, including mobility, better channel access, improved coverage, and a higher probability of line-of-sight (LoS) signal propagation compared to terrestrial networks serve as a promising foundation to overcome the current challenges. To support various application scenarios, multiple UAVs may collaborate and establish different networking topologies including mesh, star, bus, and hierarchical architectures with respect to the communication requirements and the capabilities of the UAVs. Conversely, satellite communications have been exploited to provide users with internetworking services in remote areas for the last decade. In this system, ground stations typically act as transfer nodes that connect to the satellite constellation and relay communications to user devices. The above observation leads to the necessity of studying current proposals and reorganizing such aerial access architectures toward a comprehensive access infrastructure for 6G networks.
̽ ij Terrestrial-CubeSat ٽ (Research on Core Technologies of Terrestrial-CubeSat Communication for Space Caching Service), NRF, 2023.03.01~2027.02.28
종?? 차세대 8U ?신·?트워??기술 개발 (Development of End-to-End 8 Ultra-Communication and Networking Technologies), IITP, 2022.07.01~2029.12.31
커넥티드 모?리티? ?? ?신?트워??및 보안 ??????구 (Connected Mobility Basic Research Laboratory), NRF, 2022.06.01~2025.02.28
D. S. Lakew, A.-T. Tran, N.-N. Dao, and S. Cho, "Intelligent Offloading and Resource Allocation in Heterogeneous Aerial Access IoT Networks," to appear in IEEE Internet of Things Journal, 2023. [PDF]

D. S. Lakew, W. Na, N.-N. Dao, and S. Cho, "Aerial Energy Orchestration for Heterogeneous UAV-Assisted Wireless Communications,," IEEE Systems Journal, vol. 16, no. 2, pp. 2483-2494, June 2022. )
N.-N. Dao, Q.-V. Pham, N. H. Tu, T. T. Thanh, V. N. Q. Bao, D. S. Lakew, and S. Cho, "Survey on Aerial Radio Access Networks: Toward a Comprehensive 6G Access Infrastructure," IEEE Communications Surveys and Tutorials, vol. 23, no. 2, pp. 1193-1225, February 2021. [PDF]
D. S. Lakew, U. Saad, N.-N. Dao, W. Na, and S. Cho, "Routing in Flying Ad Hoc Networks: A Comprehensive Survey," IEEE Communications Surveys and Tutorials, vol. 22, no. 2, pp. 1071-1120, March 2020. [PDF]