Space Division Multiple Access for Optical Attocell Network Using Angle Diversity Transmitters

Chen, Zhe; Basnayaka, Dushyantha A.; Haas, Harald

doi:10.1109/jlt.2017.2670367

Cited by 51 publications

(51 citation statements)

References 25 publications

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“…Regarding VLC channels, based on pioneering works [4], [23], [26], [27], we set T s (ψ oi,j ) = 1 , φ oi,1/2 = 17 • , n = 1.5, to [4], with φ oi,1/2 = 17 • for each LED element, the 7element angle-diversity transmitters are designed to have a LED semiangle at half-power equal to 60 • which is equivalent to the one in conventional single-element transmitters. Further, according to Wysips Reflect [30], a solar pannel can be integrated into the phone screen, thus we can set Ar j = 85 cm 2 (i.e.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Further, to avoid inter-transmitter interference, two vertically consecutive transmitters are adjusted to guarantee a shift of 360 M I degrees between them. Particularly, it is worth noting that the light intensity or the radiance angle at half-power in the covered area is the same regardless of the values of M I [4]. Under this condition, increasing the number of elements M E improves the spectral efficiency and increases the number of users able to be simultaneously served [4], however, it does not impact the lightwave WPT performance.…”

Section: A Optical Angle-diversity Transmitters With Color Allocationmentioning

confidence: 98%

“…Each LED element points in a distinct direction. The angle diversity transmitter, whose layout is described in [4], covers the same area and provides the same white illumination as conventional single-element transmitters. However, since the beam of each LED element can interfere with the others, multi-color white LED lamps, e.g.…”

Section: A Optical Angle-diversity Transmitters With Color Allocationmentioning

confidence: 99%

“…Motivated by the aforementioned issues, in this paper, we consider a hybrid RF/VLC network consisting of multiple optical transmitters, one multi-antenna RF AP, and multiple terminal devices. Each optical transmitter, composed of multiple LED elements, can generate multiple narrow beams simultaneously, known as optical angle-diversity transmitters [4]. This configuration in terms of spatial division can enhance the bandwidth resource and eliminate intercell interference in attocell networks [4].…”

Section: Introductionmentioning

confidence: 99%

“…Each optical transmitter, composed of multiple LED elements, can generate multiple narrow beams simultaneously, known as optical angle-diversity transmitters [4]. This configuration in terms of spatial division can enhance the bandwidth resource and eliminate intercell interference in attocell networks [4]. Further, each terminal device is equipped with one single antenna and one photodetector.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ultra-Small Cell Networks With Collaborative RF and Lightwave Power Transfer

Tran

Kaddoum

Diamantoulakis

et al. 2019

IEEE Trans. Commun.

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This paper investigates a hybrid radio frequency (RF)/visible light communication (VLC) ultra-small cell network consisting of multiple optical angle-diversity transmitters, one multi-antenna RF access point (AP), and multiple terminal devices. In the network, the optical transmitters play the primary role and are responsible for delivering information and power over the visible light, while the RF AP acts as a complementary power transfer system. Thus, we propose a novel collaborative RF and lightwave resource allocation scheme for hybrid RF/VLC ultra-small cell networks. The proposed scheme aims to maximize the communication quality-of-service provided by the VLC under a constraint of total RF and light energy harvesting performance, while keeping illumination constant and ensuring health safety. This scheme leads to the formulation of two optimization problems that correspond to the resource allocation at the optical transmitters and the RF AP. Both problems are optimally solved by appropriate algorithms. Moreover, we propose a closed-form suboptimal solution with high accuracy to tackle the optical transmitters' resource allocation problem, as well as an efficient semi-decentralized method. Finally, simulation results illustrate the achievable performance of the investigated system and the effectiveness of the proposed solutions.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: A Optical Angle-diversity Transmitters With Color Allocationmentioning

confidence: 98%

Section: A Optical Angle-diversity Transmitters With Color Allocationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultra-Small Cell Networks With Collaborative RF and Lightwave Power Transfer

Tran

Kaddoum

Diamantoulakis

et al. 2019

IEEE Trans. Commun.

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Collaborative Transmitters Management for Multi‐user Indoor VLC Systems

Younus

2021

Trans Emerging Tel Tech

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The main encounters face visible light communication (VLC) systems to provide high data rates for multiuser scenario are intersymbol interference (ISI) and cochannel interference (CCI). This work proposes delay adaptation technique (DAT) in conjunction with power adaptation technique (PAT) to improve the performance of the multiuser indoor VLC systems. The DAT is used to reduce the ISI while the PAT is utilized to reduce the CCI. To apply the DAT and PAT, each access point (AP) requires to share its information with the controller, which is responsible to manage the connection between user equipment (UEs) and APs. Therefore, each AP is given a control signal (an unmodulated unique tone signal). These control signals are utilized to set‐up the connection between APs and UEs (allocate each UE its best APs, which are APs that offer good connection links). Our proposed system performance is evaluated in a realistic room while considering the effect of diffuse reflections and CCI and using on‐off‐keying modulation. The results reveal that a remarkable improvement in the VLC system's performance with using DAT and PAD compared with the VLC system without using DAT and PAT.

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