A novel bandwidth and power allocation scheme for power efficient hybrid RF/VLC indoor systems

Kafafy, Mai; Fahmy, Yasmine; Abdallah, Mohamed; Khairy, Mohamed M.

doi:10.1016/j.phycom.2018.04.025

Cited by 9 publications

(16 citation statements)

References 42 publications

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“…Step 1: The goal of this step is to the elite user as the center of the cluster, who is selected according to (16). This operation is equal to finding user node, whose node degree degrees are greater than or equal to 0, such as u 5 , u 9 , u 12 , u 13 in Fig.…”

Section: Elite User Clustering Methodsmentioning

confidence: 99%

“…Where d j is node degree of the user. According to (16), we can determine the elite users in each scheduling cycle.…”

Section: ) Vlc Elite User and Normal User Criteriamentioning

confidence: 99%

“…In (20), the user whose degree of satisfaction equals to 1 is defined as a satisfied user [16]. First, we study the effect of the number of users M. The average user satisfaction is a function of M as shown in Fig.…”

Section: B User Satisfaction Investigationsmentioning

confidence: 99%

“…In Ref. [16], [17], a novel joint power and bandwidth allocation was investigated for a hybrid VLC-RF system consisting of multiple VLC APs and one RF AP. As the number of VLC APs participating in communication increases, the inter cell interference increases when the number of users is small, and the system performance is also affected.…”

Section: Introductionmentioning

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: Elite User Clustering Methodsmentioning

confidence: 99%

“…Where d j is node degree of the user. According to (16), we can determine the elite users in each scheduling cycle.…”

Section: ) Vlc Elite User and Normal User Criteriamentioning

confidence: 99%

Section: B User Satisfaction Investigationsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…They showed that, by tightening delay requirements, the multi-homing mechanism provides a much better performance. In [98], for multi-users with multiple VLC APs and one RF AP, authors studied the problem of maximizing the EE under maximum power constraints on both RF and VLC APs, and under QoS constraints, when the multi-homing mechanism was applied. In [99], authors expanded on the work presented in [98] and [100], and jointly allocated the power and bandwidth to the users, but in only one VLC and one RF AP.…”

Section: A Optimizing Hybrid Vlc/rf Networkmentioning

confidence: 99%

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

Obeed

Salhab

Alouini

et al. 2019

IEEE Commun. Surv. Tutorials

178

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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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A comprehensive survey on hybrid wireless networks: practical considerations, challenges, applications and research directions

Mohsan¹,

Hussain

2021

Opt Quant Electron

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A novel bandwidth and power allocation scheme for power efficient hybrid RF/VLC indoor systems

Cited by 9 publications

References 42 publications

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

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

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

A comprehensive survey on hybrid wireless networks: practical considerations, challenges, applications and research directions

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