27-08-2016, 12:58 PM
1449593699-LiFi.txt (Size: 2.34 KB / Downloads: 6)
-Li Fi is nothing but the Light fidelity communication systems.
-It is the fastest and cheapest wireless communication systems and is the optical version of the Wifi. The term was first used by Harald Haas in TED Global talk.
-The technology works by adapting LEDs to send digital information, invisible to the naked eye
-A light sensor on a device picks up the digital information sent by the LED, which enables it to be processed by a computer.
-It is similar to the Wifi except that it uses Light waves instead of Radio waves.
-LiFi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission.
-LiFi is designed to use LED light bulbs similar to those currently in use in many energy-conscious homes and offices. However, LiFi bulbs are outfitted with a chip that modulates the light imperceptibly for optical data transmission. LiFi data is transmitted by the LED bulbs and received by photoreceptors.
-LiFi's early developmental models were capable of 150 megabits-per-second (Mbps). Some commercial kits enabling that speed have been released. In the lab, with stronger LEDs and different technology, researchers have enabled 10 gigabits-per-second (Gbps), which is faster than 802.11ad.
Advantages
-Wifi is great for general wireless coverage while Lifi is ideal for high density coverage in a confined region.
-It is believed that the technology can yield a speed more than 10 Gbps, allowing a HD film to be downloaded within 30 seconds.
-Higher speeds than Wi-Fi.
-10000 times the frequency spectrum of radio.
-More secure because data cannot be intercepted without a clear line of sight.
-Prevents piggybacking.
-Eliminates neighboring network interference.
-Unimpeded by radio interference.
-Does not create interference in sensitive electronics, making it better for use in environments like hospitals and aircraft.
Disadvantage
-is that the light waves cannot penetrate walls.
-In 2012, this technology was demonstrated and it was detectable upto a distance of 10 meter.
Amazing Fact about Li-Fi is
- Every light source in homes and offices could potentially be a �Li-Fi� within 20 years.
- When this technology becomes feasible like the Wifi, then our life will be awesome on earth.
"This is the technology that could start to touch every aspect of human life within a decade�