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  Li-Fi-An Alternative to Wi-Fi  
  Authors : Saniya Salim Sayed; Nidhi Ghanshyam Agrawal
  Cite as:


Light Fidelity (Li-Fi) refers to 5G Visible Light Communication systems using light-emitting diodes as a medium to high-speed communication in a similar manner as Wi-Fi. In the days where internet has become a major demand, people are in a search for Wi-Fi hotspots. Li-Fi or New Life of data communication is a better alternative to Wi-Fi in wireless communication. This paper proposes a survey on Li-Fi Technology. The Li-fi technology was invented by Professor Harald Hass of University of Edinburgh. Li-Fi has more capacity in terms of bandwidth in visible region therefore it does not poke its nose in other communications which uses radio frequency range, without taking its frequency bands. Li-Fi has thousand times greater speed than Wi-Fi and provides security as the visible light is unable to penetrate through the walls, which propose a new era of wireless communication. The concept of Li-Fi is data communication on fast flickering of light which is not detected by human eye but it is focused on photo detector which converts the onoff state into binary digital data. It has gained a huge popularity in two years of its invention. Such technology has brought not only greener but safer and cheaper future of communication.


Published In : IJCSN Journal Volume 6, Issue 6

Date of Publication : December 2017

Pages : 787-791

Figures :06

Tables : 01


Saniya Salim Sayed : She is pursuing B.E. in Computer Engineering at Sinhgad Academy of Engineering, Pune(at present in the second year).An active debator, orator who won various debate competitions.

Nidhi Ghanshyam Agrawal : : She is pursuing B.E. in Computer Engineering at Sinhgad Academy of Engineering, Pune (at present in the second year).Ready to accept challenges and is a multi-tasking girl.


LED (Light Emitting Diode),Wi-Fi (Wireless Fidelity),Li-Fi(Light Fidelity),VLC(Visible Light Communication ),RF(Radio Frequency)

In this paper, a survey on Li-Fi technology has been discussed. From this 5G Li-Fi technology, we can see that the Li-Fi is an advanced approach on design, having the best design of internet by largely reducing the size of device which transfers data, implementation- by means of having more than 1.4 million light bulbs all over the world if replaced by such LEDS can provide feasible access, and last but not the least enormous applications compared to any other networks in various fields which cannot be imagined by on use networks. Although there are some disadvantages, but can be eliminated by careful further research.


[1] http://hackaday.com/2015/12/11/hackaday-explains-lifi-visible-light-communications/ [2] http://www.youtube.com/watch?v=gjqSgsKbagQ [3] http://www.dvice.com/archives/2012/08/lifi_ten_ways _i.php [4] http://www.smithsonianmag.com/innovation/li-fireplace-wi-fi-180957320/