Academic literature on the topic 'Framework LED Data Communication Wi-Fi (Wireless Fidelity) and Li-Fi (Light Fidelity)'

Communication is essential in now a day to day life. In present world people are using more Wireless and cable communication . We have two primary types of exchange. Wireless communication outperforms cable communication most of the time. Li-Fi is the upcoming, growing technology acting as competent for various other developing and invented technologiesLi-Fi stands for Light Fidelity. Li-Fi is a form of networking that avoids radio waves in favour of a pure spectrum.This notion was introduced in a TED(Technology, Entertainment and Design) Global Talk by German researcher Harald Haas in 2011. Li-Fi (Light Fidelity) uses the visible light band of the electromagnetic wave spectrum. Since it is ten thousand times larger than the RF (Radio Frequency) band, this band cannot be overcrowded. Light waves can be altered to concurrently hold large quantities of data when traveling at very high speeds. Li-Fi enables data transfer that is a hundred times quicker than Wi-Fi (Wireless Fidelity). This System has regulated the speed which human eye has not be perceived its blinking. At receiver by applying photosensitive detector, transmitted data can be received.

In this paper a Li-Fi and Wi-Fi-based weather monitoring system is built using drone. The atmospheric conditions are monitored using the drone and the gathered information is communicated to the ground station using Li-Fi technology. The process of transfer of information involves gathering data using sensors and transfer of data using Li-Fi technology. Data is processed and sent to the receiving station by using Light Fidelity technology. The received data is uploaded to a cloud data base using Wi-Fi technology. Real time data is displayed in an android device using IOT technology. Increased used of wireless communication which used Radio Frequency leads to RF congestion. Light Fidelity system is a best alternative by using a visible light instead of Radio frequency as used by all wireless communication system.

Over the decades, radio waves have been the leading source for data transmission. Wi-Fi (Wireless-fidelity), Infrared, Bluetooth, and Zigbee are examples of wireless communication that require radio waves for information transmission. Despite the extensive adoption of these technologies, exploring new methods for wireless and efficient data transmission has become an utmost priority. One of the solutions to this problem is Light Fidelity (Li-Fi), which uses light instead of electromagnetic waves as a medium. Li-Fi, an example of visible light communication (VLC), operates via a light-emitting diode to transfer data by flickering them at a very high speed, which cannot be notifiable to the eye. This paper implements the VLC system using readily available electronic components like Arduino and LED. In this paper, we have researched the domains of wireless communication and emphasize a novel approach to transmitting data by harnessing visible light. Our study focuses on the concept of light-based information transfer, which takes advantage of the properties of visible light to send data wirelessly. By using existing lighting infrastructure, such as LED bulbs, we aim to amplify the capacity and efficiency of wireless networks while reducing interference. Through extensive research and experimentation, we have provided insight into the feasibility and practicality of utilizing visible light as a means for information transmission. We analyze the advantages offered by light-based data transfer, including its ability to provide higher bandwidth, greater security, and immunity against electromagnetic interference. Moreover, we examine various connectivity solutions by comparing into the lumens of various light sources namely Standard bulb, Halogen, CFL and LED operating at energy of 40 W. The results obtained highlight the nature of visible light communication (VLC) systems and their potential to revolutionize wireless networks. We also address the applications and limitations associated with VLC.

The focus of the paper is Vehicle to Vehicle (V2V) communication system that uses a wireless communication technology using a LED transmitter and therefore the vehicle will transmit the information continuously to the opposite vehicle ahead it using Head light. The data is stored within the Secure Digital Card in comma separated value for future reference just in case of emergency at the equivalent time the data’s are stored in the Cloud Server for Government Reference to locate the accident prone zones. The Light fidelity (Li-Fi) is that the newest technology within the field of wireless communication. As the number of users are increasing, the speed of knowledge transmission within the wireless network gets automatically decreased.

Li-Fi (Light Fidelity) is an important green technology being sought after these days. It is used in environments where Wi-Fi is a constraint, for example in hospitals, airplanes, schools, security installations, etc and areas where higher bandwidth and faster data speeds are required since Wi-Fi signals may interfere destructively with the existing signals generated by these environments. Li-Fi provides security by obeying the principle of the line of sight (LoS) and prevents the signals from leaking out of the room, hence preventing eavesdropping. The Li-Fi technique without modifications for optical communication, degrades and disables the transmitting signal to navigate far within the room. Various factors can be enhanced and adapted to improve the overall efficiency and efficacy, such as modulation, LED and Photodiode arrays in a particular geometrical pattern, alignment and synchronization, optical filters, and lenses to guide the transmitting signal onto the receiver for optimal output response. The paper proposes the improvement of Li-Fi transmission range using modulation techniques in an indoor environment. The authors have demonstrated experimentally, how the LED transmission of signal data through Li-Fi link is improved by implementing a simple OOK modulation. We have also demonstrated the transmission of the data packet of the patients by performing OOK with PWM modulation for transmission and sending a flicker free and constant light current. By doing this the transmission range was improved to 3mtrs, which is Quite acceptable.

Light fidelity (Li-Fi) is a technology that is used to design a wireless network for communication using light. Current technology based on wireless fidelity (Wi-Fi) has some drawbacks that include speed and bandwidth limit, security issues, and attacks by malicious users, which yield Wi-Fi as less reliable compared to LiFi. The conventional key generation techniques are vulnerable to the current technological improvement in terms of computing power, so the solution is to introduce physics laws based on quantum technology and particle nature of light. Here the authors give a methodology to make the BB84 algorithm, a quantum cryptographic algorithm to generate the secret keys which will be shared by polarizing photons and more secure by eliminating one of its limitations that deals with dependency on the classical channel. The result obtained is sequence of 0 and 1, which is the secret key. The authors make use of the generated shared secret key to encrypt data using a one-time pad technique and transmit the encrypted data using LiFi and removing the disadvantage of the existing one-time pad technique.