Robust Cooperative Multicarrier Transmission Scheme for Optical Wireless Cellular Networks

Borja Genoves Guzman,Victor P Gil Jimenez,Alexis A Dowhuszko,Ana I Perez-Neira

doi:10.1109/lpt.2017.2781184

Borja Genoves Guzman, Victor P Gil Jimenez + Show 2 more

Open Access

https://doi.org/10.1109/lpt.2017.2781184

Copy DOI

Abstract

Visible light communication (VLC) is a promising technology to achieve high data rates in heterogeneous scenarios. However, VLC strongly depends on the existence of a line-of-sight (LoS) link between transmitter and receiver to guarantee a good data rate performance, which is often a condition that is difficult to satisfy in practice. In this letter, a novel cooperative multicarrier transmission scheme is proposed, where neighboring attocells smartly cooperate to decrease the probability of blockage in the LoS link. This approach is compared to single-cell transmission schemes, obtaining notable gains in both received signal-to-interference-plus-noise ratio and cell data rate when blockage of the LoS link occurs toward the nearest base station.

Highlights

T HE mobile data traffic demand has been exponentially increasing during the last decade, and the Radio Frequency (RF) spectrum has become overcrowded to cope with this trend
The level of maturity of solid state lighting technology has enormously improved during the last years, and halogen lighting is being replaced by Light-Emitting Diodes (LEDs) to save energy, protect the environment, and reduce the maintenance costs due to long lifetime
In this letter we propose a novel approach that is suitable to combat the LoS link blockage in wireless systems using multicarrier modulation, including Visible Light Communication (VLC) systems

Summary

INTRODUCTION

T HE mobile data traffic demand has been exponentially increasing during the last decade, and the Radio Frequency (RF) spectrum has become overcrowded to cope with this trend. The short-range coverage of the LED lighting allows the creation of a dense small cell network that increases the area spectral efficiency Such a dense VLC network deployment is usually termed in the literature as an attocell network [2]. Multiple-Input Multiple-Output techniques in the context of an optical attocell network are explored in [1] and [6] Another limiting factor in VLC is the need of a Line-of-Sight (LoS) condition between LED and PD. In indoor scenarios with many pieces of furniture and users, LoS is often partially or completely blocked To address this problem, in this letter we propose a novel approach that is suitable to combat the LoS link blockage in wireless systems using multicarrier modulation, including (but not limited to) VLC systems. The benchmark for this work is established in [8]

SYSTEM MODEL

Proposal

Analysis

RESULTS

CONCLUSION