Vertical Handover Scheme for Enhancing the QoE in VLC Heterogeneous Networks

Bao, Xu; Adjardjah, Winfred; Okine, Andrews A.; Zhang, Wence; Bao, Nan

doi:10.1109/iccchina.2018.8641126

Cited by 10 publications

(14 citation statements)

References 12 publications

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“…On the other hand, the direct received average power of sight path is vulnerably blocked, and VLC uplink implementation is difficult. Therefore, combining the VLC network with a radio frequency (RF) access point (AP) extend the network coverage and improves the total system performance [7]- [12].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…A heterogeneous RF/VLC IoT network architecture is presented to support the above mentioned different services, as shown in Fig. 6 [147,149]. Under this heterogeneous network, RF is capable of offering wide-area coverage and VLC has the ability to provide high transmission data rate due to the abundant bandwidth resources across multiple optimal cells.…”

Section: Discussionmentioning

confidence: 99%

“…The authors in [145] optimized the power allocation within each cell to enhance the data rate under QoS constraints. Considering the unpractical components and challenges of the wireless VLC uplink [149], and VLC only offers the downlink data streams while RF provides both the uplink and downlink data streams. When the VLC links are blocked, the device can switch the transmission mode from VLC links to RF links to continue their services.…”

Section: Multi-cell Vlc Systemsmentioning

confidence: 99%

“…1) Handover mechanism: Due to the mobility behavior of devices in dynamic hybrid RF/VLC networks, vertical handover and horizontal handover need to be operated to maintain the good mobile connectivity and guarantee devices' QoS requirements [149][150][151][152][153][154]. The efficient vertical handover mechanisms based on Markov decision process were presented to reduce the handover cost and delay while satisfying devices' delay requirements [149,150]. The literatures in [151] and [152] proposed dynamic load balancing schemes to maximize the systems throughput with considering the device mobility and handover overheads.…”

Section: Related Work In Hybrid Rf/vlc Networkmentioning

confidence: 99%

“…In VLC networks, the VLC LoS links can support the successful communication services while the blocked LoS VLC links cannot provide the high transmission data rate services [147,149]. For the VLC link, the LOS channel gain from one AP to one device is…”

Section: Vlc Channel Modelmentioning

confidence: 99%

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