10 Gbit/s .... :O Li_Fi

[Sri_Sampath]

After success of wireless data transmission technology Wi-Fi, scientists are coming with a new age technology ‪#‎Li_Fi‬.
'#Li_Fi' is a lot faster than what we are currently getting from Wi-Fi. In Lab conditions, researchers claimed to achieve the speeds of 224 gigabits per second by testing #Li_Fi technology.
Researchers believe that #Li_Fi is capable of sending data up to 1GB per second which is 100 times quicker than average Wi-Fi networks.

https://en.wikipedia.org/wiki/Li-Fi

Li-Fi is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. Coined by Prof. Harald Haas,[1] Li-Fi is a subset of optical wireless communications (OWC) and can be a complement to RF communication (Wi-Fi or Cellular network), or a replacement in contexts of data broadcasting.

It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves) spectrum, part of optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations.[2] A complete solution includes an industry led standardization process.

This OWC technology uses light from light-emitting diodes (LEDs) as a medium to deliver networked, mobile, high-speed communication in a similar manner to Wi-Fi.[3] Li-Fi could lead to the Internet of Things, which is everything electronic being connected to the internet, with the LED lights on the electronics being used as Li-Fi internet access points.[4] The Li-Fi market is projected to have a compound annual growth rate of 82% from 2013 to 2018 and to be worth over Rs859.13 billion per year by 2018.[5]

Visible light communications (VLC) works by switching bulbs on and off within nanoseconds,[6] which is too quick to be noticed by the human eye. Although Li-Fi bulbs would have to be kept on to transmit data, the bulbs could be dimmed to the point that they were not visible to humans and yet still functional.[7] The light waves cannot penetrate walls which makes a much shorter range, though more secure from hacking, relative to Wi-Fi.[8][9] Direct line of sight isn't necessary for Li-Fi to transmit a signal; light reflected off the walls can achieve 70 Mbit/s.[10][11]

Li-Fi has the advantage of being useful in electromagnetic sensitive areas such as in aircraft cabins, hospitals and nuclear power plants[citation needed] without causing electromagnetic interference.[8][9] Both Wi-Fi and Li-Fi transmit data over the electromagnetic spectrum, but whereas Wi-Fi utilizes radio waves, Li-Fi uses visible light. While the US Federal Communications Commission has warned of a potential spectrum crisis because Wi-Fi is close to full capacity, Li-Fi has almost no limitations on capacity.[12] The visible light spectrum is 10,000 times larger than the entire radio frequency spectrum.[13] Researchers have reached data rates of over 10 Gbit/s, which is much faster than typical fast broadband in 2013.[14][15] Li-Fi is expected to be ten times cheaper than Wi-Fi.[7] Short range, low reliability and high installation costs are the potential downsides.[5][6]

PureLiFi demonstrated the first commercially available Li-Fi system, the Li-1st, at the 2014 Mobile World Congress in Barcelona.[16]

Bg-Fi is a Li-Fi system consisting of an application for a mobile device, and a simple consumer product, like an IoT (Internet of Things) device, with color sensor, microcontroller, and embedded software. Light from the mobile device display communicates to the color sensor on the consumer product, which converts the light into digital information. Light emitting diodes enable the consumer product to communicate synchronously with the mobile device.[17][18][19]

References

1. Harald Haas. "Harald Haas: Wireless data from every light bulb". ted.com.
2. "Light Fidelity (Li-Fi): Towards All-Optical Networking", D. Tsonev, S. Videv and H. Haas; Institute for Digital Communications, Li-Fi R&D Centre, The University of Edinburgh, EH9 3JL, Edinburgh, UK.
3. Light bulbs could replace your Wi-Fi router, Digital Trends, 30 October 2013, Joshua Sherman
4. Tech firm sees the light with Rs646.58m funding, The Scotsman, Peter Ranscombe, 24 December 2013
5. a b Visible Light Communication (VLC)/Li-Fi Technology Market worth Rs878,897.17 Million - 2018, New International, 13 November 2013
6. a b LiFi beats Wi-Fi with 1GB wireless speeds over pulsing LEDs, gearburn, 13 January 2013, Jacques Coetzee
7. a b Condliffe, Jamie (28 July 2011). "Will Li-Fi be the new Wi-Fi?". New Scientist.
8. a b Li-Fi – Internet at the Speed of Light, by Ian Lim, the gadgeteer, dated 29 August 2011
9. a b "Visible-light communication: Tripping the light fantastic: A fast and cheap optical version of Wi-Fi is coming". The Economist. 28 January 2012. Retrieved 22 October 2013.
10. The internet on beams of LED light, The Science Show, 7 December 2013
11. Jump up ^ "ADS Advance — PureLiFi aims at combating cyber crime". adsadvance.co.uk.
12. a b THE FUTURE’S BRIGHT – THE FUTURE’S LI-FI, Caledonian Mercury, 29 November 2013
13. High-speed wireless networking using visible light, Spie, Harald Haas, 19 April 2013
14. Jump up ^ i-Fi revolution: internet connections using light bulbs are 250 times faster than broadband , The Independent, James Vincent, 28 October 2013
15. 'Li-fi' via LED light bulb data speed breakthrough, BBC News, Matthew Wall, 28 October 2013
16. pureLiFi to demonstrate first ever Li-Fi system at Mobile World Congress, Virtual-Strategy Magazine, 19 February 2014
    
17. Low-Complexity Visible Light Networking with LED-to-LED Communication Domenico Giustiniano, Nils Ole Tippenhauer, Stefan Mangold http://people.ee.ethz.ch/~dgiustin/images/LED-to-LED.pdf
18. Very Low-Cost Sensing and Communication Using Bidirectional LEDs Paul Dietz, William Yerazunis, Darren Leigh TR2003-35 July 2003 http://www.merl.com/publications/docs/TR2003-35.pdf
19. Jump up ^ Bg-Fi datasheet http://www.publicityproviders.com/li-fi/

 

[IreshMM]

ela

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[Dhanushka.N]

co0ver unama wada nathi wenawane ban