Coexistence of WiFi and LiFi toward 5G: concepts, opportunities, and challenges

Ayyash, Moussa; Elgala, Hany; Khreishah, Abdallah; Jungnickel, Volker; Little, Thomas D. C.; Shao, Sihua; Rahaim, Michael; Schulz, Dominic; Hilt, J. Zach; Freund, Ronald

doi:10.1109/mcom.2016.7402263

Cited by 398 publications

(174 citation statements)

References 13 publications

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“…This is motivated by the fact that whenever communication is needed illumination is also needed most of the time. Compared to RF backscatter, VLC backscatter solves the backhaul challenge by utilizing the existing infrastructure with slight modification [12]- [14] (i.e. adding driver and photodetector to the light source and utilizing the power line communication or power over Ethernet).…”

Section: Introductionmentioning

confidence: 99%

Pixelated VLC-Backscattering for Self-Charging Indoor IoT Devices

Shao

Khreishah

Elgala

2017

IEEE Photon. Technol. Lett.

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Abstract-Visible light communication (VLC) backscatter has been proposed as a wireless access option for Internet of Things (IoT). However, the throughput of the state-of-the-art VLC backscatter is limited by simple single-carrier pulsed modulation scheme, such as on-off keying (OOK). In this paper, a novel pixelated VLC backscatter is proposed and implemented to overcome the channel capacity limitation. In particular, multiple smaller VLC backscatters, switching on or off, are integrated to generate multi-level signals, which enables the usage of more advanced modulation schemes than OOK. Based on experimental results, rate adaptation at different communication distances can be employed to enhance the achievable data rate. Compared to OOK, the data rate can be tripled when 8-PAM is used at 2 meters. In general, n-fold throughput enhancement is realized by utilizing n smaller VLC backscatters while incurring negligible additional energy using the same device space as that of a single large backscatter.

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Section: Introductionmentioning

confidence: 99%

Pixelated VLC-Backscattering for Self-Charging Indoor IoT Devices

Shao

Khreishah

Elgala

2017

IEEE Photon. Technol. Lett.

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“…silicon photodiode which serves because the receiving element data from the sender is converted into byte format after which converted into moderate indicators which might be emitted with the aid of the usage of the transmitter. [5,7] The light signal is received with the aid of the photodiode on the receiver aspect. The reverse manner takes place on the vacation spot laptop to retrieve the records decrease back from the obtained slight.…”

Section: Architecture/working:-mentioning

confidence: 99%

A Sustainable Lifi Based Model for Desert Ecosystem.

Aggarwal¹,

Aggarwal²,

Joshi³

et al. 2018

IJAR

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“…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%

“…Mobile device orientation has been studied generally [13] and for VLC in a number of works [14,15] . Lastly, there is much work on small cell VLC networks -including the incorporation of alternative media such as RF [7,16,17] .…”

Section: Introductionmentioning

confidence: 99%

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

Rahaim

Morrison

Little

2017

J. Commun. Inf. Netw.

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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.

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Coexistence of WiFi and LiFi toward 5G: concepts, opportunities, and challenges

Cited by 398 publications

References 13 publications

Pixelated VLC-Backscattering for Self-Charging Indoor IoT Devices

Pixelated VLC-Backscattering for Self-Charging Indoor IoT Devices

A Sustainable Lifi Based Model for Desert Ecosystem.

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

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