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    On the Throughput of Mixed FSO/RF UAV-Enabled Mobile Relaying Systems with a Buffer Constraint

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    1570502053_kihong park.pdf
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    Type
    Conference Paper
    Authors
    Lee, Ju Hyung
    Park, Kihong cc
    Alouini, Mohamed-Slim cc
    Ko, Young Chai
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2019-07-16
    Online Publication Date
    2019-07-16
    Print Publication Date
    2019-05
    Permanent link to this record
    http://hdl.handle.net/10754/656838
    
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    Abstract
    In this paper, we consider an unmanned aerial vehicle (UAV) aided mobile relaying system under a buffer constraint at the relay node. We propose a new relaying protocol employing mixed free-space optical/radio frequency (FSO/RF) communication, i.e., the source-relay and relay-destination link utilize FSO communication and RF communication, respectively, under the buffer constraint which is required to consider practical relay system. We study the trajectory optimization problem of buffer-constrained UAV-relaying in order to maximize the end-to-end data throughput. Taking the conditions of the mixed FSO/RF systems (e.g., a full-duplex relaying network that works in decode-and-forward, atmospheric attenuation, transmit power, and bandwidth in FSO and RF links) into consideration, we characterize the channel and throughput models. Furthermore, corresponding to the buffer-aided relaying, we derive a limited buffer constraint regarding the state of the queue in the buffer of relay. We solve the optimal trajectory problem of the UAV to maximize the throughput of user terminal using quadratically constrained programming. As a result, we propose an iterative algorithm that efficiently finds a local optimum solution for the throughput maximization problems. Our numerical results show that proposed buffer-aided mobile relaying achieves 161.3% throughput gains compared to a static relaying scheme.
    Citation
    Lee, J.-H., Park, K.-H., Alouini, M.-S., & Ko, Y.-C. (2019). On the Throughput of Mixed FSO/RF UAV-Enabled Mobile Relaying Systems with a Buffer Constraint. ICC 2019 - 2019 IEEE International Conference on Communications (ICC). doi:10.1109/icc.2019.8761378
    Sponsors
    This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government(MSIT)(NRF-2019R1A2B2007789)
    Publisher
    IEEE
    Conference/Event name
    2019 IEEE International Conference on Communications, ICC 2019
    DOI
    10.1109/ICC.2019.8761378
    Additional Links
    https://ieeexplore.ieee.org/document/8761378/
    ae974a485f413a2113503eed53cd6c53
    10.1109/ICC.2019.8761378
    Scopus Count
    Collections
    Conference Papers; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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