Light Fidelity is a wireless technology that uses light for data communication. It is a bidirectional network that delivers data at high speed. Mobile users can experience high data throughput with Light fidelity than the existing wireless fidelity technology. This paper mainly focuses on the network performance of Light fidelity and wireless fidelity when many devices connect to the system. The aim was carried out by simulating the wireless fidelity system in the OPNET Modeller environment. The result obtained showed that as the number of users increases, there is a reduction in data throughput and increment in latency and packet loss. Simulation of Light fidelity done in the Simulink environment showed that there were high data throughput, low latency, and low packet loss. Light Fidelity network was not significantly affected by the number of users. The result of both light fidelity and wireless Fidelity was compared using a python program. Observation showed that the network performance of the light fidelity system was better than the wireless fidelity system. The percentage improvement of the data throughput of light fidelity to wireless fidelity was 53% while that of latency and packet loss is 39.1% and 8.78% respectively.
Wireless Fidelity utilizes radio waves. Radio waves have limited bandwidth, fully exploited, and low speed. Light fidelity is a visible light communication used as a medium to carry high-speed data. It can complement the wireless fidelity in accessing the internet, thereby reducing congestion. In this work, a hybrid of light fidelity and wireless fidelity was carried out in an indoor environment. The geometry of the light fidelity access point and wireless fidelity access point was analyzed in the MatLab environment to know the highest power received by the user. Some ranges of received power considered for good reception wereassigned for each of the wireless access points in the MatLab program. Visual Basic, an object-oriented computer programming language, reads the signal coming from the communication port of light fidelity and wireless fidelity. It mimics the analyzed MatLab program of a hybrid network of light fidelity and wireless fidelity and connects to any of the wireless access points based on the set conditions of the satisfied received power. With these, the light fidelity can complement the limited available radio frequency.
This work focused on the Wireless Fidelity performance evaluation in Nigeria using mobile networks. The existing Wireless Fidelity System (Wi-Fi) from three different networks (MTN, 9MOBILE, and GLO) were characterized to determine the throughput, latency, and packet loss. Enugu State University of Science and Technology Exxon Mobil Laboratory was used as a case study. Ten laptop devices connected to the networks were installed with NetLimiter Software to capture the traffic statistics. The same data size of 29.12MB was downloaded from the YouTube website for three months to obtain the average network performance parameters as a result of the daily variations of the received signal strength. The result showed that there was a high decrease in data throughput, an increase in latency, and packet loss as the connected user's increases. Although out of three different networks used, MTN got the best network performance. Wi-Fi network utilizes the already congested radio waves. Other frequencies such as Visible Light Spectrum can complement with it to yield high data speed communication.
Network performance is the measure of the quality of service offered by the network. It hinders when multiple loads are running on a wireless local area network, thereby causing slow down in social communication, networking, and business activities. This paper aimed at improving network performance in a wireless local area network using light fidelity technology. The light fidelity system designed and developed was a bidirectional system of downlink and uplink transceiver circuits. Physical measurement was carried out on the developed light fidelity system using Netlimiter software to capture the network performance. Results obtained showed that the performance of light fidelity systems throughput was high, while the latency and packet loss was low. The network performance of the light fidelity system was better than the wireless fidelity technology in the wireless local area network. Its network performance is not significantly affected by the number of users and hence should be utilized in a high-density environment. ). temperature, low cost, small size, and long lifetime [11]. Photodiodes operate as photodetectors, tomography, smoke detectors, and blood gas monitors.Light Fidelity is safe and used in areas where RF communication cannot fit in, such as aircraft, underwater, and hospital without causing interference [7]. In aviation, it cannot interfere with the pilot's navigation systems and as well provide high-speed internet using the overhead bulb present in the airplane. Even in underwater applications, it could replace wires used in underwater remotely operated vehicles with a high powered lamp or headlamps for communication and data processing. Li-Fi can be used to control the medical equipment and avoid any of it being hazardous to the patient's health [12]. Li-Fi cannot penetrate the walls because of its shorter wavelength, but it is a potential candidate for mobile connectivity yielding higher data rates and higher security. III. MATERIALS AND METHODBidirectional communication for the Li-Fi system involves uplink and downlink transceiver circuits. In the design of the downlink Li-Fi transceiver circuit, the characteristic impedance of LAN output taken as 100ohms is in line with the standard norm of IEEE. At the transmitter side, 28 pins ML4664 single-chip integrated circuit LED driver shown in fig. 1 was used to obtain superior performance and avoid system complexity. ML4664 is an LED driver that converts 10BASE-T Copper media to 10BASE -F Fiber media and offers a current output that directly drives an LED.
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