Who invented Li Fi technology?
History. Professor Harald Haas, coined the term “Li–Fi” at his 2011 TED Global Talk where he introduced the idea of “Wireless data from every light”. He is Chairman of Mobile Communications at the University of Edinburgh and co-founder of pureLiFi.
What is Full Form Of Li-Fi ?
Li–Fi (Light Fidelity) is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi.
What is the li fi?
The term Li–Fi was coined by pureLiFi’s CSO, Professor Harald Haas, and refers to light based communications technology that delivers a high-speed, bidirectional networked, mobile communications in a similar manner as Wi-Fi. … LiFi is a category of Optical Wireless Communications (OWC).
How does a LiFi work?
Light Fidelity or Li–Fi is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds. Li–Fi uses common household LED (light emitting diodes) lightbulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.
What is Difference between Li-Fi & Wi-Fi ?
- Li-Fi can be considered as a light-based Wi-Fi. It uses light instead of radio waves to transmit information.
- Li-Fi is transmission of data using illumination i.e. sending data through an LED lamp that varies intensity of light faster than what human eye can perceive.
- Instead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information.
- Wi Fi is great for general wireless coverage within building and Li-Fi is ideal for high density wireless date coverage in confined area and for relieving radio interference issues.
- So the two technologies can be considered complimentary.
Here are few Pros and Cons of Li-Fi;
- Li-Fi can solve problems related to the insufficiency of radio frequency bandwidth because this technology uses Visible light spectrum that has still not been greatly utilized.
- High data transmission rates of up to 10Gbps can be achieved.
- Since light cannot penetrate walls, it provides privacy and security that Wi-Fi cannot.
- Li-Fi has low implementation and maintenance costs.
- Can be used in RF restricted environments where EM waves are restricted.
- By not using radio and serving same use case, it eases out interference and congestion of highly occupied radio bands i.e. ISM band used popularly in WPAN technologies.
- Light can’t pass through objects.
- A major challenge Li-Fi is facing; how the receiving device will transmit back to transmitter.
- Interference from external light sources like sun, light, normal bulbs, opaque materials.
- Line of Sight requirement, so area coverage is limited and indoor mostly.
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