alexa Li-Fi (Light Fidelity)- A New Paradigm in Wireless Communication
ISSN ONLINE(2320-9801) PRINT (2320-9798)

International Journal of Innovative Research in Computer and Communication Engineering
Open Access

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Research Article

Li-Fi (Light Fidelity)- A New Paradigm in Wireless Communication

Dr.Simmi Dutta1, Kameshwar Sharma2, Naman Gupta3, Tenzen Lovedon Bodh4
  1. HOD, Dept. of Computer Engineering , Government College of Engineering and Technology, Jammu, India
  2. B.E., Student, Government College of Engineering and Technology, Jammu, India
  3. B.E., Student, Government College of Engineering and Technology, Jammu, India
  4. B.E., Student, Government College of Engineering and Technology, Jammu, India
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Abstract

The first word that comes to your mind when you read the title is Wi-Fi (wireless fidelity), most of us are familiar to this, it uses 2.4-5 GHz RF (radio frequency) to deliver internet access around a wide area. Whenever you are using internet over a wireless network you may be deprived of the speed over that network. As more and more users get connected to the network, the rate of data transfer gets reduced. So when people with their many devices access wireless internet, clogged airwaves are going to make it increasingly difficult to latch onto a reliable signal. The wireless network uses radio waves for the transmission of the data. But radio waves are just one part of the spectrum that can carry our data. We have become quite dependent upon this nearly ubiquitous service. But like most technologies, it has its limitations. So a question arises in our mind that can’t we use the other part of the spectrum? The answer is “YES”. The part of spectrum that we can use conveniently is the visible spectrum. German physicist, Dr. Harald Haas, has put forward the idea of “Data Through Illumination”—taking the fiber out of fiber optics by sending data through an LED light bulb that varies in intensity faster than the human eye can follow. It’s the same idea behind infrared remote controls, but far more powerful. Haas says his invention, which he calls D-Light, can produce data rates faster than 10 megabits per second, which is speedier than your average broadband connection. He envisions a future where data for laptops, smart phones, and tablets is transmitted through the light in a room. And security would be snap – if you can’t see the light, you can’t access the data. Optical wireless technologies, sometimes called visible light communication (VLC), and more recently referred to as Li-Fi (Light Fidelity), on the other hand, offer an entirely new paradigm in wireless technologies in terms of communication speed, flexibility and usability. In simple words Li-Fi is a method of communication in which we transmit data using visible light region of electromagnetic spectrum with the help of LEDs. So by Li-Fi you attain data transmission by using your simple light resources. So you can now connect to internet where ever you find light, in schools, colleges, offices, aircrafts and even on the roads and almost everywhere because there are rare places where light is not present.

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