Li-Fi Technology in Wireless Communication

Li-Fi Technology in Wireless CommunicationDelhi Technological University A Seminar On:Submitted by:Akash PadhaniaUnder the guidance ofProfessor Narender KumarDepartment of EEDelhi Technological University

Contents IntroductionDrawbacks Of Before TechnologiesDifferent Between The TechnologiesWorking process Of Li-FiApplicationsMerits/De-Merits Conclusion

Introduction

One german physcist. Harald Haas has come up with a solution he calls

data through illumination D-Light taking the fiber out of fiber optic by sending data through an LED light bulb that varies in intensity faster than the human eye can follow.

History of NetworksIn the olden days.

Wired networking.

Satellites Communications.

Wireless networking.PRESENT TECHNOLOGYRadio Spectrum is congested but the demand for wireless data double each year .Every thing, it seems want to use wireless data but the capacity is drying up.

So what can carry this excess demand in the future .

1.4 Million base stations, 5 billion Mobile stations

600tb data every month

Li-Fi technology

Li-Fi means Light Fidelity. It is possible to encode data in the light by varying the rate at which the LEDs flicker ON and OFF to give different strings of 1s and 0s.Architecture OF Li-Fi

Li-Fi environment

Working processLi-Fi offers an integrated light source that is straight forward to integrate into a projector. In this example LIFI consists of 5 primary sub-assemblies: Printed circuit board (PCB) RF power amplifier (PA) BulbOpticsEnclosure

How Li-Fi Works ? operational procedure is very simple if the LED is ON, you transmit a digital 1sif its OFF you transmit a 0s. The LEDs can be switched ON and OFF very quickly, which gives nice opportunities for transmitting data.

Giga showerGiga mimoFor giga-speed technologies, the Li-Fi Consortium defined GigaShower, GigaSpot and GigaMIMO models Different Between The Technologies

APPLICATIONSON OCEAN BEDSRF restricted EnvironmentsHospitals(In few medical instrumentsStreet lamps(as free access points)In Aircraft cabins

Hospitals(In few medical instruments)

Street lamps(as free access points)

In Aircraft cabins

MERITSHigh SecurityEasy To UseFast Data Transfer Reliable Harmless nessLow Cost

DE-MERITSlight can't pass through objectsConnectivity while moving

Interferences from external light sources like sun light, normal bulbs, and opaque materials in the path of transmission will cause interruption in the communication.

Conclusion The possibilities are numerous and can be explored further. If This technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed toward the cleaner, greener, safer and brighter future. REFRENCES[1]http://www.electronicsforu.com/electronicsfo ru/circuitarchives/view_article.asp?sno=778&title%20=%20LiFi%3A+A+New+Paradigm+in+Wireless+Communication&b_type=new&id=12042[2]. http://en.wikipedia.org/wiki/Li-Fi [3]. International Journal of advances in computing & communications, vol 1, 2013,page no-12 www.ijacc.org