Li-Fi Communication

Current era many people are using internet to accomplish their task through wired or wireless network. As number of users get increased in wireless speed decreases proportionally. Though Wi-Fi gives us speed up to 150mbps as per IEEE 802.11n, it is still insufficient to accommodate number of users. To remedy this limitation of Wireless Fidelity, we are introducing concept of Li-Fi. Li-fi stands for light fidelity which enables to transfer data and provide internet through the visible light signals which differentiates it from other technologies. 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. This system can be demonstrated as bidirectional VLC [Visible light Communication] system where both computers can act as transceiver. Using a processing software, Arduino software and Arduino hardware the transmission of files occurs between two computers where LED [light emitting diode] and LDR[Light dependent resister] were in the same line of sight. It is observed that the system has worked better for white LED than the red LED and IR LED. So, VLC based text and file transfer system is implemented with white LED. The operational procedure is very simple-, if the LED bulb is on, you transmit a digital 1, if it’s off you transmit a 0. The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data. Hence all that is required is some LEDs and a controller that code data into those LEDs. All one has to do is to vary the rate at which the LED’s flicker depending upon the data we want to encode.