Li-Fi (Light Fidelity): Data Communication Using Visible Light

Computer Network

Li-Fi stands for light fidelity. Li-Fi is a bidirectional, high-speed and fully networked wireless communication technology similar to Wi-Fi. Li-Fi provides transmission of data through illumination by sending data through an LED light bulb that varies in intensity faster than human eye. The light which we are using in our daily life is not only used for providing light but also for communication by illumination. The Radio Frequency (RF) communication suffers from interference and high latency issues. Along with this, RF communication requires a separate setup for transmission and reception of RF waves. Overcoming the above limitations, Visible Light Communication (VLC) is a preferred communication technique because of its high bandwidth and immunity to interference from electromagnetic sources. Li-Fi is a latest technology that makes use of LED (Light Emitting Diodes) light which helps in the transmission of data much faster and flexible than data that can be transmitted through Wi-Fi. It refers to 5G VLC systems using LED as a medium to high-speed communication, Li-Fi provides better Capacity, efficiency, availability and security than Wi-Fi.

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