LIFI TECHNOLOGY

By

J.Sowjanya (10M11A0520)

INTRODUCTION

Li-Fi means “Light Fidelity”. LI-FI is transmission of data through illumination ,ie

sending data through a LED light bulb that varies in intensity faster than human eye can follow

HISTORY

The technology truly began during the 1990's in countries like Germany, Korea, and Japan where they discovered LED's could be retrofitted to send information. 

Harald Haas continues to wow the world with the potential to use light for communication

Harald Haas

PRESENT SCENARIO

ISSUES REGARDING RADIO SPECTRUM

CapacityCapacity AvailabilityAvailability

EfficiencyEfficiencySecuritySecurity

HOW LIFI WORKS?

The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data. Hence all that us required is some LEDS and a controller that code data into those LEDs

COMPARISON BETWEEN TECHNOLOGY

APPLICATIONS

There are millions of street lamps deployed around the world.Each of these street lamps could be a free access point.

ADVANTAGES

Availability Efficiency High security Easy to use Fast data transfer Harmless Low-cost

DISADVANTAGES

Light can't pass through objects. A major challenge facing Li-Fi is how the receiving

device will transmit back to transmitter. High installation cost of the VLC systems

CONCLUSION

The possibilities are numerous and can be explored further.

If his 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.

REFERENCE

http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb.html