A hybrid Radio Frequency and broadcast Visible Light Communication system

Rahaim, Michael; Vegni, Anna Maria; Little, Thomas D. C.

doi:10.1109/glocomw.2011.6162563

Cited by 204 publications

(125 citation statements)

References 13 publications

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…This diversity leads to spatial reuse and drastic bandwidth density (Mb/s/m2) improvements in multiuser environments. Heterogeneous wireless systems have also been proposed where VLC supplements conventional RF communications in order to provide the bandwidth density benefits of VLC while mitigating issues related to channel blocking, intrusive uplink, and marketability [1], [2].…”

Section: Introductionmentioning

confidence: 99%

State estimation and motion tracking for spatially diverse VLC networks

Rahaim

Prince

Little

2012

2012 IEEE Globecom Workshops

View full text Add to dashboard Cite

Improvements in solid-state/LED lighting are driving increased capabilities of lighting systemsoffering potential for applications such as Visible Light Communications (VLC) and indoor localization using the lighting medium. In this paper, we motivate the adoption of localization for both the support of handover between arrays of VLC-equipped luminaires as well as for indoor positioning and beam steering. Our approach uses a state estimation model to achieve localization and motion tracking in spatially diverse VLC networks while considering user mobility and dynamic device orientation. Under these conditions, we show simulation results with location and velocity errors of 5cm and 10cm/s, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

State estimation and motion tracking for spatially diverse VLC networks

Rahaim

Prince

Little

2012

2012 IEEE Globecom Workshops

View full text Add to dashboard Cite

show abstract

“…Open Challenges 1) Uplink: Since the uplink transmission from the mobile devices relying on VLC may be wasteful in terms of its energyconsuming and may impose visual disturbances, most of the open literature focuses on the VLC DL transmission [76]. In order to solve this uplink problem, both RF- [150] and infrared-based [166] techniques may be employed. Furthermore, WiFi has been ubiquitously rolled out in indoor environments, which is capable of providing convenient uplink transmissions for VLC-based HetNets.…”

Section: A Design Guidelinesmentioning

confidence: 99%

“…In [149], the horizontal handovers between multiple VLC APs were studied in both non-overlapping spotlighting and in overlapping uniform lighting scenarios. Rahaim et al [150] investigated the VHO criteria of a hybrid VLC/wireless fidelity (WiFi) network in order to improve both the service quality and the total throughput. As a further development, Liang et al [151] proposed an advanced VHO algorithm relying on the prediction of transfer delay in a hybrid VLC/LTE system, which may be determined by service interruption duration, message size, access delay, etc.…”

Section: A Vlc-aided Heterogeneous Networkmentioning

confidence: 99%

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

Zhang

Hanzo

2018

IEEE Commun. Surv. Tutorials

View full text Add to dashboard Cite

Abstract-In order to counteract the explosive escalation of wireless tele-traffic, the communication spectrum has been gradually expanded from the conventional radio frequency (RF) band to the optical wireless (OW) domain. By integrating the classic RF band relying on diverse radio techniques and optical bands, the next-generation heterogeneous networks (HetNets) are expected to offer a potential solution for supporting the ever-increasing wireless tele-traffic. Owing to its abundant unlicensed spectral resources, visible light communications (VLC) combined with advanced illumination constitute a competent candidate for complementing the existing RF networks. Although the advantages of VLC are multi-fold, some challenges arise when incorporating VLC into the classic RF HetNet environments, which may require new system architectures. The user-centric (UC) design principle for VLC environments constitutes a novel and competitive design paradigm for the super dense multi-tier cell combinations of HetNets. The UC concept may be expected to become one of the disruptive techniques to be used in the forthcoming fifthgeneration era. This paper provides a comprehensive survey of visible-light-aided OW systems with special emphasis on the design and optimization of VLC networks, where the radically new UC design philosophy is reviewed. Finally, design guidelines are provided for VLC systems.

show abstract

“…Overlapping coverage also adds interference when multiple APs attempt to transmit simultaneously -degrading the performance of the network. Heterogeneous RF/VLC networks have been proposed where RF provides coverage and reliability while static VLC cells add supplemental capacity [16,17,19] . In this case, the luminaires are often provisioned to satisfy the lighting mission and then used opportunistically to add capacity via VLC.…”

Section: Indoor Owcmentioning

confidence: 99%

Beam control for indoor FSO and dynamic dual-use VLC lighting systems

Rahaim

Morrison

Little

2017

J. Commun. Inf. Netw.

Self Cite

View full text Add to dashboard Cite

Practical VLC (Visible Light Communication) systems are expected to leverage the lighting infrastructure in order to deliver data to devices in a lighting field. These devices can be static or quasistatic (e.g., laptops or IoT devices); however, it is becoming clear that the preponderance of wireless data consumption is dominated by handheld mobile devices which will exhibit varying physical orientations and 3D dynamics. Because free-space optical and visible light communications are primarily line of sight, transmitter radiation patterns and receiver field of view are very important for predicting the data performance. Given dynamic emission characteristics, there is an opportunity to adapt to the receiver. The caveat of dynamic VLC systems is that the quality and distribution of the resulting illumination must be considered as part of the dual goal of providing high quality lighting. In this paper we investigate the impact of device orientation and mobility on static and then dynamic lighting emission under a multi-cell lighting model. From a source standpoint we consider the performance of beam control through angular control and beam focus for one or more sources in a lighting array. Analysis and simulation demonstrate that dynamic beam and luminaire control can increase the AP coverage range by 12.8X under a 1.67 m ceiling height. Furthermore, the use of multiple sources tracking device orientation and position can mitigate off-angle performance degradation by increasing redundancy in the number of available connections. Our proposed techniques, when applied in concert, successfully mitigate common concerns about the viability of VLC and indoor FSO (Free Space Optical Communication) methods related to signal occlusion and device dynamics.

show abstract

A hybrid Radio Frequency and broadcast Visible Light Communication system

Cited by 204 publications

References 13 publications

State estimation and motion tracking for spatially diverse VLC networks

State estimation and motion tracking for spatially diverse VLC networks

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

Beam control for indoor FSO and dynamic dual-use VLC lighting systems

Contact Info

Product

Resources

About