International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Comparison of LI-FI with Wireless Media Rachita1, Dr. Rohini. V2 1Student,
Department of Computer Science, Christ University, Bengaluru, Karnataka, India. Department of Computer Science, Christ University, Bengaluru, Karnataka, India.
1Professor,
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Abstract – Light Fidelity, also known as Li-Fi, designates
then it transmits the data (integrated in its beam) at fast speeds to the photo-detector (photodiode).
the Visible Light Communication type of systems which uses light-emitting diodes that are a means for ensuring high-speed communication as the Wi-Fi does. In this research, the concept of Li-Fi will be thoroughly analyzed. First, Light Fidelity is a new developing notion in the realm of the present technology. In order for this to function, there are a lot of elements which are gathered together and they create one final product which facilitates communication simply using only a light. The purpose of this paper is to describe each component of the LiFi, the Working Principles, as well as the advantages and the disadvantages which come with Li-Fi. Although it is a remarkable appreciated concept, Li-Fi has its own advantages and disadvantages. It sustains the NOFN, which is the Digital India program (it enables a faster access to data), and it has 1000 times much more consistency than Wi-Fi along with enhanced speed. However, Li-Fi cannot go beyond walls, meaning that it is not as easily intercepted as the Wi-Fi signal. This is a part of its limitations.
The small change in the fast dimming of LED bulbs is afterwards changed by the “receiver” into an electrical signal. This signal in its turn will be transformed into a binary datastream which the user will perceive as web, or video and audio services that run on internet. First of all, it is necessary to have the correct information about what is Li-Fi and its basic aspects. Its functionality is not so difficult to understand. Here, we explain its functionality and the various elements included in the Li-Fi, as well as models of implementation in usual objects which everybody use daily. Much research and different evaluations have already been done on Li-Fi. It is important to know that Li-Fi can be utilized for common objects, as this will be useful for everyone. In order to include Li-Fi in an object, the whole structure will have to be modified and certain products supporting this system will be used.
Key Words: Li-Fi, NOFN, Wi-Fi, VLC
The next step is to understand how the various components used in Li-Fi work and how they are interconnected so as to support each other and to function properly. That is why each element will be described in turn for a clear understanding of this process.
1. INTRODUCTION Professor Harald Hass, at the University of Edinburgh, is the one who devised Li-Fi technology. This innovative product enables data transmission and can unlock capacity which is 10,000 times bigger than the one reachable by means of radio spectrum. The notion of Li-Fi is based around data communication with the means of light that cannot be perceived by human eyes, and which is focused on a photo signal which will transform this on-off condition into binary digital data. [1]
One of the most important parts refers to its applicability and different ways in which Li-Fi is useful for people. Li-Fi can be implemented for various products and this will make communication much easier. Each new technological development has its advantages and disadvantages in today’s society. This is the case with Li-Fi, because it brings some positive elements in our society, and at the same time some negative effects as well. [2]
This notion of Li-Fi is very effective in the present world, because it represents a real productive alternative to data delivery. With our current technology and devices people get to connect to wireless internet, but unfortunately there is less and less accessibility to free bandwidth, and that is how Li-Fi is very helpful in this situation. In other words, Li-Fi can be used instead of Wi-Fi.
2. WORKING PRINCIPLE Li-Fi is defined as Visible Light Communication (VLC) system which enables data delivery. A common VLC system includes two elements: 1) There must be at least one component with a photodiode which can get light signals.
Li-Fi includes a photo detector which gets light signals and a signal processing device in order to transform the data into “stream-able” matter. Then, the data will be found in a LED light bulb (which includes a signal processing capability),
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2) The second element is a light source equipped with a signal processing element.
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