An Overview of LiFi: a 5G candidateTechnology

In this modern era where all the facilities such as banking, shopping, online payments, games etc. all equipment can be accessed by Internet, has led to congestion of radio spectrum. Many solutions have been suggested to solve this issue; one of them is Li-Fi (Light Fidelity). This 5G visible light communication (VLC) system uses light emitting diodes to achieve high data rates in a similar manner as Wi-Fi (Wireless Fidelity). All types of light support Li-Fi data transmission i.e. visible, infrared and ultra-violet. Professor Harald Hass from University of Edinburgh invented Li-Fi. Communication using near Ultraviolet or visible region of electromagnetic spectrum provides better frequency range, productivity, accessibility and safety than Wi-Fi. Li-Fi has already attained extremely faster speed in lab. In this review paper, we have encapsulated the strengths, feebleness, chances and threats of Li-Fi technology. This 5G candidate technology has many strengths, the most indispensable of them all is that it is leveraging the low-cost LEDs which allows people to use the web by LED bulbs available a street corner, the vehicles to interlink with each other through the available headlights.