Hybrid LiFi and WiFi Networks: A Survey

Wu, Xinzhou; Soltani, Mohammad; Zhou, Lai; Safari, Majid; Haas, Harald

doi:10.48550/arxiv.2001.04840

Cited by 5 publications

(5 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alternatively, in order to overcome the lower data rate and limited dimming support issues of other modulation schemes, the IEEE 802.15.7 standard proposed CSK modulation [9]. It uses multiple optical sources with different colors (wavelengths) [58]. The data are transmitted through the variation of color emitted by RGB VLC transmitters [59].…”

Section: Color-shift Keyingmentioning

confidence: 99%

Visible Light Communications: A Survey on Recent High-Capacity Demonstrations and Digital Modulation Techniques

Loureiro,

Guiomar,

Monteiro

2023

Photonics

View full text Add to dashboard Cite

In order to deal with the increasing number of mobile devices and with their demand for Internet services, particularly social media platforms, streaming video, and online gaming, Radio-Frequency (RF) wireless networks have been pushed to their capacity limits. In addition to this, 80% of the total data traffic is carried out by users inside buildings. Therefore, new technologies have started to be considered for indoor wireless communications. Visible Light Communications (VLC) can provide both illumination and communications, appearing as an alternative or complement to RF wireless networks. VLC offers high bandwidth and immunity to interference from electromagnetic sources. This manuscript reviews recent high-capacity VLC demonstrations. The main focus of this work is to present digital-signal-processing techniques used in VLC systems. Different modulation formats are analyzed, which can be divided into two large groups, namely single-carrier and multi-carrier modulation schemes. Finally, some recently proposed capacity-achieving strategies are presented. We discuss how to implement these techniques and how they will be useful for the continued development of VLC systems.

show abstract

Section: Color-shift Keyingmentioning

confidence: 99%

Visible Light Communications: A Survey on Recent High-Capacity Demonstrations and Digital Modulation Techniques

Loureiro,

Guiomar,

Monteiro

2023

Photonics

View full text Add to dashboard Cite

show abstract

“…Influence of user mobility is studied only for the room topology. Random Way Point (RWP) mobility model is widely used in research [15] and is well suited for this scenario with slow moving users. The blockage model with no block is named as Model0, the correlated blockage defined by Eq.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Algorithmic and System Approaches for a Stable LiFi-RF HetNet Under Transient Channel Conditions

Vijayaraghavan

Prado

Wiese³

et al. 2021

2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

View full text Add to dashboard Cite

A LiFi-RF heterogeneous network can provide additional capacity to standalone wireless technologies due to their non-interfering nature. However, due to the properties of the short-range LiFi channel, the network is prone to transient channel variations that result in frequent, unnecessary handovers. This handover process creates an overhead and can result in the loss of connection. To ensure a stable connection for all users, a low complexity resource allocation algorithm, that considers the loss due to handovers, is proposed to minimize the number of handovers. This algorithmic approach is evaluated with simulations. For scenarios with unavoidable handovers, a system approach to manage vertical handovers is proposed to minimize the vertical handoff overhead and to offer a seamless interface switch, thereby resulting in a stable network. This protocol is implemented in hardware and the results show a negligible overhead.

show abstract

“…Hybrid VLC/RF systems have been developed as state-ofthe-art solutions to mitigate the mobility/coverage and uplink transmission issues [11]- [13]. Several prior research, such as [14]- [16], have used hybrid VLC/RF networks to improve the performance of both technologies. For example, an omnidirectional RF connection is merged with multiple directional VLC links in [11] to optimize downlink capacity under various network conditions.…”

Section: Introductionmentioning

confidence: 99%

Hybrid VLC/WiFi Architectures with Priority Feedback Channels

Ngo

Giuliano

Croce

et al. 2022

2022 61st FITCE International Congress Future Telecommunications: Infrastructure and Sustainability (FITCE)

View full text Add to dashboard Cite

In this paper, we consider integrating Visible Light Communication (VLC) and WiFi technologies in an ultra-dense (massive) Internet of Things scenario, where WiFi links are used for complementing VLC links and vice-versa. Indeed, in case of mobility and/or bidirectional communications, limited coverage areas and self-generated interference can be an issue.We consider hybrid VLC/WiFi nodes where the VLC link is used for the majority of (data) traffic and the WiFi link is employed as a feedback channel (e.g. transmitting TCP ACKs). In presence of intense WiFi traffic, the WiFi network may be congested and thus, to fully exploit the VLC bandwidth, we discuss possible priority mechanisms to fully exploit the VLC link. Simulations in NS-3 demonstrate the effectiveness of the proposed solutions.

show abstract

Hybrid LiFi and WiFi Networks: A Survey

Cited by 5 publications

References 159 publications

Visible Light Communications: A Survey on Recent High-Capacity Demonstrations and Digital Modulation Techniques

Visible Light Communications: A Survey on Recent High-Capacity Demonstrations and Digital Modulation Techniques

Algorithmic and System Approaches for a Stable LiFi-RF HetNet Under Transient Channel Conditions

Hybrid VLC/WiFi Architectures with Priority Feedback Channels

Contact Info

Product

Resources

About