Handover in VLC networks with coordinated multipoint transmission

Demir, M. Selim; Miramirkhani, Farshad; Uysal, Murat

doi:10.1109/blackseacom.2017.8277715

Cited by 32 publications

(41 citation statements)

References 19 publications

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“…, u M }. In addition, the physical layer builds upon direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) [19] as the modulation scheme for VLC signal transmission in the paper.…”

Section: System Modelmentioning

confidence: 99%

“…The direct-current (DC) gain of the LOS VLC channel between the i-th VLC and j-th user can be given in [19] by…”

Section: A Vlc Channelmentioning

confidence: 99%

“…T s (ψ) denote the gain of the optical filter, g(ψ) is the gain of an optical concentrator. Further, rect(z) is an indicator function [19]:…”

Section: A Vlc Channelmentioning

confidence: 99%

“…In this paper, we mainly focus on the VLC has a dominant LOS component. In such a case, the VLC channel can be considered flat, and the received signal at PD j, i.e., y j is given by [19]:…”

Section: A Vlc Channelmentioning

confidence: 99%

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Elite User Clustering-Based Indoor Heterogeneous VLC Interference Management and Sub-Channel Allocation Strategy

et al. 2020

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The visible light communication (VLC) and wireless fidelity (WIFI) heterogeneous network is considered as a highly competitive candidate for the next generation indoor wireless communication. VLC provides high data rate as downlink transmission while WIFI can be supplied to achieve uplink transmission and make up for link interruptions caused by occlusion. Due to the dense distribution of VLC access points (APs), data rate of users is reduced by inter-cell interference (ICI) seriously, therefore, interference management (IM) is crucial to ensure user satisfaction. Meanwhile, as the number of users increases, in order to ensure the needs of users, reasonable resource allocation is required in such heterogeneous network. Hence, the center of the elite user clustering attracts its non-interfering users to join a cluster that is a user with good channel quality and high demand. And users in one cluster share resources by sub-channel reuse. In consideration of interference management and resource allocation, we investigated resource allocation based on elite users clustering for interference management in heterogeneous network, which is formulated as a throughput maximization problem, and a graph-based IM is proposed to solve it. Compared with the benchmark 1 and benchmark 2 on a rectangular layout and an irregular layout, the simulation results demonstrate that the throughput of the proposed elite user clustering algorithm is increased by 19.5% and 12%, the average user satisfaction ratio is increased by 14% and 9%, respectively. INDEX TERMS VLC heterogeneous networks, interference management, elite user clustering, inter-cell interference, user satisfaction.

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Section: System Modelmentioning

confidence: 99%

“…The direct-current (DC) gain of the LOS VLC channel between the i-th VLC and j-th user can be given in [19] by…”

Section: A Vlc Channelmentioning

confidence: 99%

“…T s (ψ) denote the gain of the optical filter, g(ψ) is the gain of an optical concentrator. Further, rect(z) is an indicator function [19]:…”

Section: A Vlc Channelmentioning

confidence: 99%

Section: A Vlc Channelmentioning

confidence: 99%

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Elite User Clustering-Based Indoor Heterogeneous VLC Interference Management and Sub-Channel Allocation Strategy

et al. 2020

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“…In this context, CoMP represents an efficient technique to combat both kinds of impairments. In VLC, CoMP was proposed in [4] to enable handover and mobility within a room, and in [5] to improve the data rate performance when using dynamic subcarrier allocation and access point (AP) selection. Similarly, spatial division multiple access (SDMA) techniques were proposed in [6] to serve, from multiple APs, a group of users that had been previously clustered.…”

Section: Introductionmentioning

confidence: 99%

Cooperative transmission scheme to address random orientation and blockage events in VLC systems

Guzmán

Dowhuszko

Jiménez

et al. 2019

2019 16th International Symposium on Wireless Communication Systems (ISWCS)

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Visible light communication (VLC) is a promising communication technology that paves the way to the Internet of Things. The forthcoming Industry 4.0 requires reliable high-speed communication links, which can be easily fulfilled with the massive adoption of the VLC technology. However, in VLC indoor communication environments, line-of-sight link blockages and strong misalignment losses between the lightemitting diode (LED) transmitters and the photodiode (PD) receivers are usual problems that must be tackled. This paper proposes a coordinated multi-point (CoMP) transmission technique to deal with both issues, and carries out a detailed evaluation of the VLC system performance as function of the PD receiver orientation and the density of obstacles in different scenarios. The proposed cooperative transmission scheme demonstrates an improvement in the average cell data rate and outage probability performance and, as a consequence, justifies the use of CoMP techniques to provide reliable VLC services in ultra-dense small cell scenarios indoors.

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