Light Fidelity (Li-Fi): In Mobile Communication and Ubiquitous Computing Applications
As the increasing nature of big data during the last few years, the problem of data traffic arises and also the pervasive nature of smart phones the number of end user smart phones was overtaken the total entire population of planet. On the other hand, th
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Light Fidelity (Li-Fi): In Mobile Communication and Ubiquitous Computing Applications Nitin Vijaykumar Swami, Narayan Balaji Sirsat and Prabhakar Ramesh Holambe Abstract As the increasing nature of big data during the last few years, the problem of data traffic arises and also the pervasive nature of smart phones the number of end user smart phones was overtaken the total entire population of planet. On the other hand, the emerging technology of Li-Fi has found to be the best solution on these problems. This works on the concept of visible light communication (VLC) and also offering many solutions to reduce the cellular infrastructure traffic and its needs. Not only the mobile communication but also the ubiquitous computing adding the more overloads to the RF spectrum. In this paper, we have covered the concepts of Li-Fi, how the Li-Fi technology can be enhanced in the mobile communication, how it works, the Li-Fi cellular network, some ubiquitous computing applications, common misconceptions about Li-Fi, Li-Fi in solar cell and Internet of Things (IoT). Keywords Li-Fi
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Li-Fi AP
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LED
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VLC
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IoT
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Ubiquitous computing
Introduction
According to the statistics of ITU, the use of mobile and Internet will reached per month around 24 Exabyte of data which was more than the 30 times the size of the entire global Internet in 2000 [1]. Also the different computing devices like laptops, tablets and sensors are adding more load to the existing infrastructure making it
N.V. Swami (✉) ⋅ N.B. Sirsat Shri Yogeshwari Polytechnic, Ambajogai, Beed, India e-mail: [email protected] N.B. Sirsat e-mail: [email protected] P.R. Holambe College of Engineering, Pune, India e-mail: [email protected] © Springer Science+Business Media Singapore 2016 A. Chakrabarti et al. (eds.), Advances in Computing Applications, DOI 10.1007/978-981-10-2630-0_5
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complicate. Surely, these technologies will be occupying the electromagnetic spectrum band in few upcoming decades. The German physicist Harald Haas proposed a “Li-Fi technology” which is a bidirectional, high speed and fully networked like Wi-Fi using the light flickering concept [2]. The simple concept of light flicker is used in which light ON condition indicates binary one and light OFF indicates binary zero. As the light speed is 1080 million km/hr the Li-Fi achieved the speed of more than 10 Gbps in its recent experiments, theoretically allowing HD films to be downloaded in 30 s only [3]. The visible light spectrum comprises 100’s of THz of free bandwidth which is 10,000 times more than the entire RF spectrum [4]. This will offload the all limitations for next generations of mobile communication. The Li-Fi network uses LED to generate the data streams and photo detectors to receive the data streams. As the small bulbs of 5mW developed by the University of Strathclyde, Glasgow, use the red, green and blue elements to transmit the three 3.5 Gbps streams, which together exceeded the speed of 10 Gbps [5].
5.2
The Working Prin
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