New Key Features of UAV-Enabled Cellular Networks: UAV Channel Modeling and Trajectory Optimization 


Vol. 45,  No. 9, pp. 1493-1507, Sep.  2020
10.7840/kics.2020.45.9.1493


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  Abstract

UAV (Unmanned aerial vehicle) has been drawing attention as a wide range of applications in future cellular networks. Their mobility in the 3-D (3-dimensional) space makes UAV an attractive alternative to conventional applications, e.g. roof-top of pole-mounted BS or relay. Specifically, when the altitude of UAV is increased, the probability of having a dominant LoS (Line of sight) is increased and thus the dominant LoS link provides the existing cellular network with a wide coverage. Besides, by dynamically adjusting location or movement of UAVs in 3-D space, UAVs offer an additional a degree of freedom (DoF) for conventional cellular network. In this paper, we give an overview of the recent advances in UAV-enabled cellular network exploiting the above advantages. In this paper, two promising research are mainly investigated: UAV channel modeling and trajectory optimization. UAV channel modeling is first discussed on new propagation characteristic, which is crucial for the design of efficient UAV communication. Second, we provide a comprehensive survey focused on the UAV trajectory optimization problems, and discuss the general formulation subject to various performance criteria. In addition, several research challenges and open problems are tackled to figure out further research: interference management, 3D placement optimization, 3D channel modeling, and security/privacy.

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  Cite this article

[IEEE Style]

N. Ha, J. An, W. Shin, "New Key Features of UAV-Enabled Cellular Networks: UAV Channel Modeling and Trajectory Optimization," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 9, pp. 1493-1507, 2020. DOI: 10.7840/kics.2020.45.9.1493.

[ACM Style]

Nohgyeom Ha, Jihye An, and Wonjae Shin. 2020. New Key Features of UAV-Enabled Cellular Networks: UAV Channel Modeling and Trajectory Optimization. The Journal of Korean Institute of Communications and Information Sciences, 45, 9, (2020), 1493-1507. DOI: 10.7840/kics.2020.45.9.1493.

[KICS Style]

Nohgyeom Ha, Jihye An, Wonjae Shin, "New Key Features of UAV-Enabled Cellular Networks: UAV Channel Modeling and Trajectory Optimization," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 9, pp. 1493-1507, 9. 2020. (https://doi.org/10.7840/kics.2020.45.9.1493)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880