Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Li, Xuan; Zhang, Rong; Hanzo, Lajos

doi:10.1109/comst.2018.2813433

Cited by 49 publications

(30 citation statements)

References 211 publications

(294 reference statements)

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“…• All optimization techniques are reviewed in Section III, including power and resource allocation, users-to-APs association, cell formation, and AP cooperation used for mitigating the disadvantages of VLC networks to improve performance. This important topic was previously investigated by Li et al [26]. However, their study was focused on the difference between user-centric and network-centric cell formations, and the interference reduction techniques, whereas in this paper, we place our attention on the techniques, used in RF/VLC and in VLC standalone networks, that are aimed at alleviating the limitations in VLC networks.…”

Section: A Related Workmentioning

confidence: 95%

“…The benefits of LEDs for illumination and communications, modulation schemes, dimming techniques, and the methods used for improving the performance of VLC were reviewed in [24], while in [25], authors focused on the VLC link level transmission and shed some light on medium access techniques and visible light sensing. A more recent study by Li et al reviewed system-level VLC networks, with a focus on user-centric network design, and compared it with the network-centric design with emphasizing on the interference reduction techniques [26]. In [27], authors explored the differences among optical wireless communications (OWC) technologies such as infrared communications, VLC, lightfidelity (LiFi), free space optical (FSO) communications, etc.…”

Section: A Related Workmentioning

confidence: 99%

See 1 more Smart Citation

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

Obeed

Salhab

Alouini

et al. 2019

IEEE Commun. Surv. Tutorials

175

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The evolving explosion in high data rate services and applications will soon require the use of untapped, abundant unregulated spectrum of the visible light for communications to adequately meet the demands of the fifth-generation (5G) mobile technologies. Radio-frequency (RF) networks are proving to be scarce to cover the escalation in data rate services. Visible light communication (VLC) has emerged as a great potential solution, either in replacement of, or complement to, existing RF networks, to support the projected traffic demands. Despite of the prolific advantages of VLC networks, VLC faces many challenges that must be resolved in the near future to achieve a full standardization and to be integrated to future wireless systems.Here, we review the new, emerging research in the field of VLC networks and lay out the challenges, technological solutions, and future work predictions. Specifically, we first review the VLC channel capacity derivation, discuss the performance metrics and the associated variables; the optimization of VLC networks are also discussed, including resources and power allocation techniques, user-to-access point (AP) association and APs-toclustered-users-association, APs coordination techniques, nonorthogonal multiple access (NOMA) VLC networks, simultaneous energy harvesting and information transmission using the visible light, and the security issue in VLC networks. Finally, we propose several open research problems to optimize the various VLC networks by maximizing either the sum rate, fairness, energy efficiency, secrecy rate, or harvested energy.

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Section: A Related Workmentioning

confidence: 95%

Section: A Related Workmentioning

confidence: 99%

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

Obeed

Salhab

Alouini

et al. 2019

IEEE Commun. Surv. Tutorials

175

View full text Add to dashboard Cite

show abstract

“…On the other hand, the authors in [34] focused on the channel models for VLC, whereas the authors in [35] reviewed the optical noise sources and noise mitigation mechanisms for VLC. A study on interference reduction techniques in VLC was recently presented in [36], where the authors reviewed and compared two different designs for VLC networks, namely, the user-centric network and networkcentric designs. Positioning and localization techniques for indoor and outdoor VLC applications were reviewed in [37].…”

Section: B Related Workmentioning

confidence: 99%

Physical Layer Security for Visible Light Communication Systems: A Survey

Arfaoui

Soltani

Tavakkolnia

et al. 2020

IEEE Commun. Surv. Tutorials

135

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Due to the dramatic increase in high data rate services and in order to meet the demands of the fifth-generation (5G) networks, researchers from both academia and industry are exploring advanced transmission techniques, new network architectures and new frequency spectrum such as the visible light and the millimeter wave (mmWave) spectra. Visible light communication (VLC) particularly is an emerging technology that has been introduced as a promising solution for 5G and beyond, owing to the large unexploited spectrum, which translates to significantly high data rates. Although VLC systems are more immune against interference and less susceptible to security vulnerabilities since light does not penetrate through walls, security issues arise naturally in VLC channels due to their open and broadcasting nature, compared to fiber-optic systems. In addition, since VLC is considered to be an enabling technology for 5G, and security is one of the 5G fundamental requirements, security issues should be carefully addressed and resolved in the VLC context. On the other hand, due to the success of physical layer security (PLS) in improving the security of radio-frequency (RF) wireless networks, extending such PLS techniques to VLC systems has been of great interest. Only two survey papers on security in VLC have been published in the literature. However, a comparative and unified survey on PLS for VLC from information theoretic and signal processing point of views is still missing. This paper covers almost all aspects of PLS for VLC, including different channel models, input distributions, network configurations, precoding/signaling strategies, and secrecy capacity and information rates. Furthermore, we propose a number of timely and open research directions for PLS-VLC systems, including the application of measurement-based indoor and outdoor channel models, incorporating user mobility and device orientation into the channel model, and combining VLC and RF systems to realize the potential of such technologies.

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“…In this review paper, we address a few important research areas in indoor VLC: physical layer algorithm design, cross-layer design, and VLC applications. Compared with recent published survey papers [61][62][63][64], this paper focuses on reviewing modulation schemes, network designs for multiuser VLC systems, and indoor positioning and tracking schemes using VLC. These schemes are compared with published algorithms as performance benchmarks.…”

Section: Paper Contribution and Organizationmentioning

confidence: 99%

Indoor visible light communications, networking, and applications

et al. 2019

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Light-emitting diodes (LEDs) are changing indoor wireless communications. Visible light communications (VLC) that use LEDs as transmitters is an emerging research area and has significant commercial potential. The light emitted from LEDs can simultaneously carry information and provide illumination. Due to the intrinsic characteristics of light, VLC is more secure, more power efficient, and can provide higher network data transmission rates than radio frequency communications. This paper describes state-of-the-art VLC systems including transmitters, receivers, and channel models. Modulation and networking algorithms for physical layer and cross-layer designs are discussed. These algorithms are designed considering practical constraints, such as the bandlimited channel, illumination requirements, and transmitted power limitations. Indoor localization algorithms are proposed, with a particular focus on fingerprinting. In addition, this paper introduces practical applications of VLC in many fields such as national defense, healthcare, robotics, and vehicle-tovehicle communications. The paper concludes with a discussion of the challenges, opportunities, and future of VLC. Nomenclature ACO-OFDM asymmetrically clipped optical OFDM APD avalanche photodiode BER bit error rate CDMA code division multiple access CEO-OFDM clipping-enhanced optical OFDM DCO-OFDM DC-biased optical OFDM HCM Hadamard coded modulation IoT internet of things JOW joint optimal waveform LED light-emitting diodes LOS line-of-sight MAI multiple access interference MIMO multiple input multiple output NLOS non-line-of-sight OCDMA optical code division multiple access OFDM orthogonal frequency division multiplexing OOC optical orthogonal code OPEN ACCESS RECEIVED

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Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Cited by 49 publications

References 211 publications

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

Physical Layer Security for Visible Light Communication Systems: A Survey

Indoor visible light communications, networking, and applications

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