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

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI:10.1109/VTCFall.2019.8890975

Weibin Ma, Lin Zhang, Furong Fang, Jing Bian

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引用次数: 2

Abstract

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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下行LiFi系统中以用户为中心的组合传输动态聚类设计

光保真(LiFi)为室内高速无线传输提供了一个很有前途的解决方案。然而，在LiFi系统中，接入点(ap)的密集部署和单位频率复用可能会引起小区间干扰(ICI)问题。在本文中，我们考虑了将有害干扰转换为有用信号从而对抗ICI的组合传输(CT)，并提出了一种用于下行LiFi系统的以用户为中心的动态聚类方案。在我们的设计中，以在比例公平约束下最大化系统吞吐量为目标，将CT聚类描述为一个混合整数非线性规划(MINLP)问题。然后，我们建立了一个精确势博弈模型，通过最佳响应算法找到纳什均衡，为MINLP问题提供了一个次优解。仿真结果表明，采用该方案的LiFi系统比采用单点传输(SPT)方案的系统具有更高的吞吐量和更好的满意度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)

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