Hard and Soft Switching for Indoor Hybrid VLC/RF Systems

Ashimbayeva, Aigerim; Kalikulov, Nurzhan; Kızılırmak, Refik Çağlar

doi:10.1109/icaict.2017.8687098

“…Improving user data rate and system capacity for the indoor environment is an important functionality of hybrid RF/VLC systems as shown in [114], [119], [120], [124], [129], [136], [137], [147], [169], [170], [172], [181], [202], [207], [208], [233]. This is due to the different characteristics of VLC and RF networks.…”

Section: E Current Applications For Hybrid Systemsmentioning

confidence: 99%

Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions

Abuella

¹

,

Elamassie

²

,

Uysal

³

et al. 2021

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Wireless communications refer to data transmissions in unguided propagation media through the use of wireless carriers such as radio frequency (RF) and visible light (VL) waves. The rising demand for high data rates, especially, in indoor scenarios, overloads conventional RF technologies. Therefore, technologies such as millimeter waves (mmWave) and cognitive radios have been adopted as possible solutions to overcome the spectrum scarcity and capacity limitations of the conventional RF systems. In parallel, visible light communication (VLC) has been proposed as an alternative solution, where a light source is used for both illumination and data transmission. In comparison to RF links, VLC links present a very high bandwidth that allows much higher data rates. VLC exhibits also immunity to interference from electromagnetic sources, has unlicensed channels, is a very low power consumption system, and has no health hazard. VLC is appealing for a wide range of applications including reliable communications with low latency such as vehicle safety communication. Despite the major advantages of VLC technology and a variety of its applications, its use has been hampered by its cons such as its dependence on a line of sight connectivity. Recently, hybrid RF/VLC systems were proposed to take advantage of the high capacity of VLC links and better connectivity of RF links. Thus, hybrid RF/VLC systems are envisioned as a key enabler to improve the user rates and mobility on the one hand and to optimize the capacity, interference and power consumption of the overall network on the other hand. This paper seeks to provide a detailed survey of hybrid RF/VLC systems. This paper represents an overview of the current developments in the hybrid RF/VLC systems, their benefits and limitations for both newcomers and expert researchers. INDEX TERMS Radio frequency (RF), visible light communication (VLC), hybrid RF/VLC, wireless fidelity (Wi-Fi), hybrid networks, hybrid RF/VLC environments.

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“…Implemented four different combinations: systems as shown in [75], [80], [81], [85], [90], [97], [98], [108], [129], [130], [132], [141], [156], [161], [162], [181]. This is due to the different characteristics of VLC and RF networks.…”

Section: E Current Applications For Hybrid Systemsmentioning

confidence: 99%

Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions

Abuella,

Elamassie,

Uysal

et al. 2020

Preprint

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Wireless communications refer to data transmissions in unguided propagation media through the use of wireless carriers such as radio frequency (RF) and visible light (VL) waves. The rising demand for high data rates, especially, in indoor scenarios, overloads conventional RF technologies. Therefore, technologies such as millimeter waves (mmWave) and cognitive radios have been adopted as possible solutions to overcome the spectrum scarcity and capacity limitations of the conventional RF systems. In parallel, visible light communication (VLC) has been proposed as an alternative solution, where a light source is used for both illumination and data transmission. In comparison to RF links, VLC links present a very high bandwidth that allows much higher data rates. VLC exhibits also immunity to interference from electromagnetic sources, has unlicensed channels, is a very low power consumption system, and has no health hazard. VLC is appealing for a wide range of applications including reliable communications with low latency such as vehicle safety communication. Despite the major advantages of VLC technology and a variety of its applications, its use has been hampered by its cons such as its dependence on a line of sight connectivity. Recently, hybrid RF/VLC systems were proposed to take advantage of the high capacity of VLC links and better connectivity of RF links. Thus, hybrid RF/VLC systems are envisioned as a key enabler to improve the user rates and mobility on the one hand and to optimize the capacity, interference and power consumption of the overall network on the other hand. This paper seeks to provide a detailed survey of hybrid RF/VLC systems. This paper represents an overview of the current developments in the hybrid RF/VLC systems, their benefits and limitations for both newcomers and expert researchers.

show abstract

“…Recently, hybrid RF/VLC networks have been proposed aiming at exploiting the benefits of both technologies [1], [2] especially in the recent era, where universal lockdown is witnessed due to the corona virus disease (COVID-19) and everything went online including the health activities. Such hybrid RF/VLC network is particularly attractive for sensitive environments such as hospitals, as the combined radio-optical network can be flexibly configured to adapt to particular scenarios and to fulfill their associated requirements [3]. Hybrid RF/VLC technology is very important as it combines the advantages of both RF and VLC standalone systems.…”

mentioning

confidence: 99%

Vertical Handover-based Hybrid RF/VLC Scheme for e-Health Applications (VHO-HeA)

Samarji

¹

,

Salamah

²

2023

Preprint

0

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Maximizing spectral efficiency and capacity of the conventional radio frequency (RF) systems are critical challenges occurring especially in RF-based indoor wireless communications where high data rate demands arise. Hence, the urge for finding an alternative wireless carrier is the key for exploiting the visible light communication (VLC) bands. However, the main issue incorporated with the usage of VLC band is the high dependency of connectivity on line of sight (LOS). Therefore, hybrid RF/VLC system has been top-hot topic in wireless communication where RF is capable of offering wide-area coverage and VLC has the ability to provide high transmission data rate. This paper presents vertical handover-based hybrid RF/VLC intra-software defined wireless body area network architecture to guarantee the different QoS requirements. Our proposed scheme maintains network reliability by prioritizing the processing of the emergency data. The proposed hard switching algorithm is formulated as multi-objective optimization problem aiming at minimizing the outage and blocking probabilities, worst-case latency, packet error rate, and maximizing the throughput and system fairness. To solve such multi-optimization problem, we have used Pareto simulated annealing to efficiently select either VLC link or RF link satisfying the system constraints. Simulation results show that the proposed hybrid RF/VLC scheme satisfies QoS for WBANs. In comparison with the standalone VLC system, hybrid RF/VLC scheme outperforms the latter for smaller values of signal to interference plus noise ratio. Better network performances were recorded in comparison with other state-of-the-art schemes.

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Hard and Soft Switching for Indoor Hybrid VLC/RF Systems

Cited by 7 publications

References 14 publications

Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions

Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions

Hybrid RF/VLC Systems: A Comprehensive Survey on Network Topologies, Performance Analyses, Applications, and Future Directions

Vertical Handover-based Hybrid RF/VLC Scheme for e-Health Applications (VHO-HeA)

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