scholarly journals Efficient Exploitation of Radio Frequency and Visible Light Communication Bands for D2D in Mobile Networks

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 168922-168933 ◽  
Author(s):  
Mehyar Najla ◽  
Pavel Mach ◽  
Zdenek Becvar ◽  
Petr Chvojka ◽  
Stanislav Zvanovec
Keyword(s):  
Visible Light ◽  
Radio Frequency ◽  
Mobile Networks ◽  
Visible Light Communication

scholarly journals High-speed visible light communication systems based on Si-substrate LEDs with multiple superlattice interlayers

PhotoniX ◽  
2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Fangchen Hu ◽  
Shouqing Chen ◽  
Yuyi Zhang ◽  
Guoqiang Li ◽  
Peng Zou ◽  
...  
Keyword(s):  
Visible Light ◽  
Radio Frequency ◽  
Communication Systems ◽  
High Speed ◽  
Visible Light Communication ◽  
Data Rate ◽  
Si Substrate ◽  
Theoretical Derivation ◽  
Wall Plug Efficiency ◽  
The Impact

AbstractHigh-speed visible light communication (VLC), as a cutting-edge supplementary solution in 6G to traditional radio-frequency communication, is expected to address the tension between continuously increased demand of capacity and currently limited supply of radio-frequency spectrum resource. The main driver behind the high-speed VLC is the presence of light emitting diode (LED) which not only offers energy-efficient lighting, but also provides a cost-efficient alternative to the VLC transmitter with superior modulation potential. Particularly, the InGaN/GaN LED grown on Si substrate is a promising VLC transmitter to simultaneously realize effective communication and illumination by virtue of beyond 10-Gbps communication capacity and Watt-level output optical power. In previous parameter optimization of Si-substrate LED, the superlattice interlayer (SL), especially its period number, is reported to be the key factor to improve the lighting performance by enhancing the wall-plug efficiency, but few efforts were made to investigate the influence of SLs on VLC performance. Therefore, to optimize the VLC performance of Si-substrate LEDs, we for the first time investigated the impact of the SL period number on VLC system through experiments and theoretical derivation. The results show that more SL period number is related to higher signal-to-noise ratio (SNR) via improving the wall-plug efficiency. In addition, by using Levin-Campello bit and power loading technology, we achieved a record-breaking data rate of 3.37 Gbps over 1.2-m free-space VLC link under given optimal SL period number, which, to the best of our knowledge, is the highest data rate for a Si-substrate LED-based VLC system.

An efficient hybrid visible light communication/radio frequency system for vehicular applications

2019 ◽  
Vol 51 (11) ◽  
Author(s):  
Marwa M. Abdel Momen ◽  
Heba A. Fayed ◽  
Moustafa H. Aly ◽  
Nour Eldin Ismail ◽  
Amr Mokhtar
Keyword(s):  
Visible Light ◽  
Radio Frequency ◽  
Visible Light Communication

scholarly journals Data Transmission using Visible Light Communication

2020 ◽  
Vol 9 (3) ◽  
pp. 192-195
Keyword(s):  
Visible Light ◽  
Radio Frequency ◽  
Electromagnetic Interference ◽  
Data Transfer ◽  
Design Method ◽  
Serial Communication ◽  
Visible Light Communication ◽  
Research Field ◽  
Radio Waves ◽  
Light Spectrum

The demand placed on wireless technology which uses Radio Frequency (RF) in the present society is growing exponentially. In the near future, due to the limited bandwidth of RF spectrum, these resources will reach an overload point. A technique of contradicting the radio frequency spectrum issue is the use of Visible Light Spectrum. Light-Fidelity (Li-Fi) is a research field which uses the visible light band within the Visible Light Communication (VLC). This paper describes the research about VLC, the design method and testing of a VLC prototype using UART (Universal Asynchronous Receiver/Transmitter) module. The design method consists of serial communication module written in python called pySerial to convert the file data to stream of bits to be sent via LED. The designed prototype is simple, cheap and provides a concrete base for fellow researchers to work further in this field. The principle of VLC is effectively exhibited in this prototype. Also, the feasibility of writing the codes in Python language, proper electronic components used to process bit wise data signals and advantages of serial communication for data transfer are successfully displayed. VLC has major application in indoor communication, underwater communication and in hospitals where radio waves causes Electromagnetic Interference.

Safety Assessment of Radio Frequency and Visible Light Communication for Vehicular Networks

2020 ◽  
Vol 27 (1) ◽  
pp. 186-192 ◽  
Author(s):  
Christopher J. Rapson ◽  
Boon-Chong Seet ◽  
Peter Han Joo Chong ◽  
Reinhard Klette
Keyword(s):  
Visible Light ◽  
Radio Frequency ◽  
Safety Assessment ◽  
Vehicular Networks ◽  
Visible Light Communication

scholarly journals An Optimal Route Discovery using Biogeography based Optimization for Vehicular Ad Hoc Networks

2021 ◽  
Vol 13 (1) ◽  
pp. 19-32
Author(s):  
Shaeista Begum ◽  
Nagaraj B. Patil ◽  
Vishwanath P
Keyword(s):  
Ad Hoc Networks ◽  
Visible Light ◽  
Radio Frequency ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Visible Light Communication ◽  
Vehicular Ad Hoc Network ◽  
Optimal Route ◽  
Frequency Bandwidth ◽  
Hoc Networks

Vehicular ad hoc network (VANET) is a subdivision of the mobile ad hoc networks which uses the moving vehicles as mobile nodes to form the mobile network. In conventional vehicular communications, the restricted radio frequency bandwidth affects the network performances. Therefore, Visible Light Communication (VLC) is integrated with the growing vehicular ad hoc network to obtain high data rate and less energy consumption during the communication. In this paper, vehicular communication is integrated with visible light communication to avoid the issues caused by the restricted radio frequency bandwidth. Moreover, the Routing using Biogeography Based Optimization (RBBO) is proposed to develop an optimal route between the source vehicles to the destination. This research performs two different communications such as vehicle to vehicle and vehicle to the infrastructure. The performance of the RBBOVLC-VANET method is analyzed by means of throughput, packet delivery ratio, delay and routing overhead as well as these performances are compared with the existing method namely ant colony optimization based routing protocol. The throughput of the routing using the biogeography based optimization method is 589.763 kbps for 500 nodes which is high when compared to the existing method.

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