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    Joint Load Balancing and Power Allocation for Hybrid VLC/RF Networks

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    Type
    Conference Paper
    Authors
    Obeed, Mohanad
    Salhab, Anas M.
    Zummo, Salam A.
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2018-01-15
    Online Publication Date
    2018-01-15
    Print Publication Date
    2017-12
    Permanent link to this record
    http://hdl.handle.net/10754/627958
    
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    Abstract
    In this paper, we propose and study a new joint load balancing (LB) and power allocation (PA) scheme for a hybrid visible light communication (VLC) and radio frequency (RF) system consisting of one RF\access point (AP) and multiple VLC\APs. An iterative algorithm is proposed to distribute the users on the APs and distribute the powers of these APs on their users. In PA subproblem, an optimization problem is formulated to allocate the power of each AP to the connected users for the total achievable data rates maximization. It is proved that the PA optimization problem is concave but not easy to tackle. Therefore, we provide a new algorithm to obtain the optimal dual variables after formulating them in terms of each other. Then, the users that are connected to the overloaded APs and receive less data rates start seeking for other APs that offer higher data rates. Users with lower data rates continue re-connecting from AP to other to balance the load only if this travel increases the summation of the achievable data rates and enhances the system fairness. The numerical results demonstrate that the proposed algorithms improve the system capacity and system fairness with fast convergence.
    Citation
    Obeed M, Salhab AM, Zummo SA, Alouini M-S (2017) Joint Load Balancing and Power Allocation for Hybrid VLC/RF Networks. GLOBECOM 2017 - 2017 IEEE Global Communications Conference. Available: http://dx.doi.org/10.1109/GLOCOM.2017.8254783.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    GLOBECOM 2017 - 2017 IEEE Global Communications Conference
    Conference/Event name
    2017 IEEE Global Communications Conference, GLOBECOM 2017
    DOI
    10.1109/GLOCOM.2017.8254783
    Additional Links
    https://ieeexplore.ieee.org/document/8254783/
    ae974a485f413a2113503eed53cd6c53
    10.1109/GLOCOM.2017.8254783
    Scopus Count
    Collections
    Conference Papers; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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