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- Title
Energy efficient short‐packet‐communication in UAV‐assisted cognitive network.
- Authors
Han, Huizhu; Huang, Yangchao; Hu, Hang; Pan, Yu; An, Qi; Liu, Shihao; Zhao, Senhao
- Abstract
This paper studies unmanned aerial vehicle (UAV)‐assisted cognitive network, where the UAV can improve the communication quality of edge users. Short packet communication (SPC) is widely used due to its low delay transmission characteristic. Unlike long packet communication in conventional wireless networks, SPC has a non‐negligible packet error rate and its data transmission rate is less than Shannon capacity. Considering the fact that the UAV is usually powered by battery, the energy efficiency (EE) maximisation problem is investigated based on short packet transmission in the UAV‐assisted cognitive network. Firstly, the closed‐form expression of EE is analysed, and then the optimisation problem is formulated by jointly optimising the spectrum sensing time, packet error rate, the flight speed, and the coverage range of UAV. Secondly, the optimisation problem is solved by dividing it into four subproblems. Then, an efficient iterative algorithm is proposed to tackle this problem. Simulation results show that the proposed optimisation scheme can evidently improve the EE performance compared with other benchmark schemes. In addition, the proposed joint optimisation algorithm not only has better convergence than exhaustive method, but also has higher stability than PSO algorithm.
- Subjects
OPTIMIZATION algorithms; ERROR rates; DATA transmission systems; DRONE aircraft; ENERGY consumption; PROBLEM solving
- Publication
IET Communications (Wiley-Blackwell), 2023, Vol 17, Issue 10, p1149
- ISSN
1751-8628
- Publication type
Article
- DOI
10.1049/cmu2.12435