Light fidelity (LiFi) provides a promising solution for indoor high-speed wireless transmissions. However, the dense deployment of access points (APs) and the unity frequency reuse in LiFi system may induce the inter-cell interference (ICI) issue. In this paper, we consider the combined transmission (CT) which converts harmful interference to useful signals and thereby combats the ICI, and propose a dynamic user-centric clustering scheme for the downlink LiFi system. In our design, with the objective of maximizing the system throughput under proportional fairness constraints, the CT clustering is formulated as a mixed-integer non- linear programming (MINLP) problem. Then we set up an exact potential game (EPG) model, where the Nash equilibrium is found via the best response algorithm, to provide a suboptimal solution to the MINLP problem. Simulation results demonstrate that the LiFi system using our presented scheme exhibits a higher throughput and a better satisfaction degree than that employing the single-point transmission (SPT) scheme.


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    Title :

    Dynamic User-Centric Clustering Design for Combined Transmission in Downlink LiFi System


    Contributors:
    Ma, Weibin (author) / Zhang, Lin (author) / Fang, Furong (author) / Bian, Jing (author)


    Publication date :

    2019-09-01


    Size :

    318125 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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