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    User Pairing, Link Selection and Power Allocation for Cooperative NOMA Hybrid VLC/RF Systems

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    user pairing.pdf
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    1.554Mb
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Obeed, Mohanad
    Dahrouj, Hayssam cc
    Salhab, Anas M.
    Zummo, Salam A.
    Alouini, Mohamed-Slim cc
    KAUST Department
    Communication Theory Lab
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2020-11-13
    Online Publication Date
    2020-11-13
    Print Publication Date
    2021-03
    Permanent link to this record
    http://hdl.handle.net/10754/665946
    
    Metadata
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    Abstract
    Despite the promising high-data rate features of visible light communications (VLC), they still suffer from unbalanced services due to blockages and channel fluctuation among users. This paper introduces and evaluates a new transmission scheme which adopts cooperative non-orthogonal multiple access (Co-NOMA) in hybrid VLC/radio-frequency (RF) systems, so as to improve both system sum-rate and fairness. Consider a network consisting of one VLC access point (AP) and multiple strong and weak users, where each weak user is paired with a strong user. Each weak user can be served either directly by the VLC AP, or via the strong user which converts light information received through the VLC link, and forwards the information to the weak user via the RF link. The paper then maximizes a network-wide weighted sum-rate, so as to jointly determine the strong-weak user-pairs, the serving link of each weak user (i.e., either direct VLC or hybrid VLC/RF), and the power of each user message, subject to user connectivity and transmit power constraints. The paper tackles such a mixed-integer non-convex optimization problem using an iterative approach. Simulations show that the proposed scheme significantly improves the VLC network performance (i.e., sum-rate and fairness) as compared to the conventional NOMA scheme.
    Citation
    Obeed, M., Dahrouj, H., Salhab, A. M., Zummo, S. A., & Alouini, M.-S. (2020). User Pairing, Link Selection and Power Allocation for Cooperative NOMA Hybrid VLC/RF Systems. IEEE Transactions on Wireless Communications, 1–1. doi:10.1109/twc.2020.3036444
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Wireless Communications
    DOI
    10.1109/TWC.2020.3036444
    Additional Links
    https://ieeexplore.ieee.org/document/9259258/
    https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9259258
    ae974a485f413a2113503eed53cd6c53
    10.1109/TWC.2020.3036444
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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