Li-Fi (Light Fidelity) Technology: The high-speed wireless communication system of the future

What is Li-Fi?

• Li-Fi (Light Fidelity) is a highly advanced wireless communication technology that transfers data through LED light.
• It uses visible light spectrum instead of radio waves (Wi-Fi), which allows a fast, secure and low energy consumption communication system to be developed.
• The main purpose of both Wi-Fi and Li-Fi is to provide internet connectivity, but Li-Fi works at 100 times faster speed.
• Li-Fi = Light + Fidelity (fast and secure communication system)

Key Components of Li-Fi System

Working Mechanism of Li-Fi

• The LED bulb blinks on and off extremely fast, transmitting binary data (0s and 1s).
• This blinking is so fast that the human eye cannot see it.
• The photo-detector converts this light into electronic signals.
• This data is transferred to the Internet or other wireless devices.

Wi-Fi vs. Li-Fi: Which is better?

• Li-Fi uses visible light instead of radio waves, making it safer and faster, but its limited coverage is a challenge.

Applications of Li-Fi Technology

Challenges of Li-Fi Technology

Limited coverage: Light needs to be in direct line-of-sight.

• Will not work when the light is off.
• Signal may be weak if there are obstacles to light.
• Limited use in public places: In open areas where there are too many light sources, Li-Fi signal may be affected.

Possible use of Li-Fi in the future

• Combination of 5G and Li-Fi: 5G and Li-Fi can be used together for high-speed networking.
• Li-Fi in smart cities: Street lights and traffic lights can be converted into Li-Fi hotspots.
• Integration of power and internet: In the future, lighting and internet will be possible from a single system.
• Space Communication: NASA is researching Li-Fi for wireless communications in space.

Difference between Li-Fi and VLC (Visible Light Communication)

• Li-Fi is an advanced technology which is faster and more efficient than VLC.