Diversity Schemes in Multi-hop Visible Light Communications for 6G Networks
Al-Naffouri, Tareq Y.
KAUST DepartmentDivision of Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/664545
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AbstractWith the fast-emerging trend of deploying Internet-of-things (IoT) in smart homes and cities, next-generation wireless systems (i.e., beyond fifth-generation (5G) of wireless mobile communications) are expected to connect a plurality of devices, including machines, sensors, tablets, cameras, etc. To this end, the radio frequency (RF) spectrum would fail to fulfill the demands of such enormous data-heavy wireless applications, as operating at the RF spectrum would largely suffer from data congestion and interference. Based on the potential of Visible Light Communications (VLC) to solve the problem of spectrum scarcity and satisfy the high data-rate requirements of beyond 5G systems, this paper focuses on utilizing VLC for IoT applications in indoor environments by means of adequately routing data among VLC-based nodes. Operating at the unlicensed optical band in t|ie visible light region utilizes simple Light-Emitting-Diodes (LEDs), which is a health-friendly communication method. VLC has the advantages of providing ultra-high bandwidth, robustness to electromagnetic interference, and inherent physical security. VLC, however, suffers from severe short communication ranges and line-of-sight (LoS) constraints. This paper proposes overcoming such challenges by means of adopting a transmit diversity scheme that transmits messages over several paths. In order to reduce the receiver outage probability, the paper proposes multiple combination schemes at the receiver side, namely selection combining, maximal-ratio combining, and threshold combining. The simulation results assess the effectiveness of the proposed diversity schemes in terms of signal-to-noise-ratio and outage probability and illustrate the suitability of deploying VLC for next-generation indoor networks. The results show that that maximal-ratio combining outperforms selection combining and threshold combining by approximately 10% and 40%, respectively.
CitationFaisal, A., Alghamdi, R., Dahrouj, H., Sarieddeen, H., Saeed, N., Al-Naffouri, T. Y., & Alouini, M.-S. (2021). Diversity Schemes in Multi-hop Visible Light Communications for 6G Networks. Procedia Computer Science, 182, 140–149. doi:10.1016/j.procs.2021.02.019
SponsorsThe authors would like to thank Dr. Abderrahmen Trichili and Mr. Mohanad Ahmed for their helpful suggestions and valuable comments.
JournalProcedia Computer Science
Conference/Event name17th International Learning and Technology Conference 2020