Abstract

Visible light communications (VLC) have been recently proposed to enhance the capacity of next generation of wireless services. Moreover, VLC networks usually comprise a large number of overlapping optical access points (APs). Moreover, each of these APs provides a small and confined area of coverage in order to generate satisfactory illumination. In this work, a user-centric (UC) clustering formation based on the K-means algorithm is proposed to manage the inter-cell interference (ICI) and enhance the performance of VLC networks. Moreover, assuming that each user is equipped with a reconfigurable photodetector, the use of blind interference alignment (BIA) in each UC cluster is considered. Notice that the data rate demands are not the same for all the users. We formulate an optimization problem to maximize the utility of the network resources allocated to the users based on their demands. After that, a centralized algorithm is proposed to obtain an optimal solution through exhaustive search, which is subject to high complexity. To reduce the complexity of this optimization problem, the problem is divided into sub-problems based on the number of constructed UC clusters. Then, a distributed algorithm via Lagrangian multipliers is proposed within each UC cluster with the aim of providing a near optimal solution to the centralized algorithm. Simulation results demonstrate that the proposed resource allocation algorithms provide higher performance than a uniform resource allocation scheme among users.

User-centric quality of experience optimized resource allocation algorithm in VLC network with multi-color LED

Xu Bao, Xinxin Gu, and Wence Zhang
Opt. Express 26(21) 27826-27841 (2018)

Distributed user-centric scheduling for visible light communication networks

Lingjiao Chen, Jiaheng Wang, Jiantao Zhou, Derrick Wing Kwan Ng, Robert Schober, and Chunming Zhao
Opt. Express 24(14) 15570-15589 (2016)

LiFi grid: a machine learning approach to user-centric design

Mohamadreza Pashazanoosi, S. Alireza Nezamalhosseini, and Jawad A. Salehi
Appl. Opt. 59(28) 8895-8901 (2020)

Graph-based multi-user scheduling for indoor cooperative visible light transmission

Jiajun Deng, Xianqing Jin, Xiaoting Ma, Meiyu Jin, Chen Gong, and Zhengyuan Xu
Opt. Express 28(11) 15984-16002 (2020)

Transmission rate Optimization by dynamic resource allocation algorithm for RF/VLC heterogeneous networks

Ruimin Gao, Ping Wang, Jingyu Wang, Ting Yang, Huili Shi, Zhao Wang, Sihui Chi, Hui Che, and Lixin Guo
Opt. Express 29(21) 32778-32795 (2021)