Green UAV communications for 6G: A survey |
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| Institution: | 1. School of Information and Communication Engineering, Dalian University of Technology, Dalian 116024, China;2. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China;3. School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;4. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China;5. Department of Electrical and Computer Engineering, Western University, London, ON N6A 5B9, Canada |
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| Abstract: | Unmanned Aerial Vehicles (UAVs) have received a wide range of attention for military and commercial applications. Enhanced with communication capability, UAVs are considered to play important roles in the Sixth Generation (6G) networks due to their low cost and flexible deployment. 6G is supposed to be an all-coverage network to provide ubiquitous connections for space, air, ground and underwater. UAVs are able to provide air-borne wireless coverage flexibly, serving as aerial base stations for ground users, as relays to connect isolated nodes, or as mobile users in cellular networks. However, the onboard energy of small UAVs is extremely limited. Thus, UAVs can be only deployed to establish wireless links temporarily. Prolonging the lifetime and developing green UAV communication with low power consumption becomes a critical challenge. In this article, a comprehensive survey on green UAV communications for 6G is carried out. Specifically, the typical UAVs and their energy consumption models are introduced. Then, the typical trends of green UAV communications are provided. In addition, the typical applications of UAVs and their green designs are discussed. Finally, several promising techniques and open research issues are also pointed out. |
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| Keywords: | Energy efficiency Green communications Sixth Generation (6G) networks Unmanned Aerial Vehicle (UAV) Wireless networks |
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