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Ppt on Li-Fi Technology by Manisha Reddy

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LI-FI is a technology that uses light from LED bulbs to transmit data, varying the intensity of light faster than the human eye can detect. It began development in the 1990s and offers potential solutions to issues with radio spectrum capacity and security. LI-FI works by transmitting digital 1s and 0s via the on/off state of LED lights. It has applications for traffic lights, intrinsically safe environments, and undersea use. Advantages over Wi-Fi include larger bandwidth, higher efficiency, more availability, and better security, though it requires the presence of light.

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B.Manisha Reddy
WHAT IS LI FI ? LI-FI is transmission of data through illumination ,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 HASS
PRESENT SCENARIO 1.4 Million 5 Billion
PRESENT SCENARIO Radio 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 .
ISSUES REGARDING RADIOSPECTRUM
CAPACITY: Radiowaves. Cost and Expensive. Less Bandwidth compared to other spectrums. Insufficient spectrum for increasing data. EFFICIENCY: Millions of basestations consume huge amount of energy for 1.Transmitting the radio waves. 2.To cool the base station cabins. 5% Efficiency.
AVAILABILITY: Available within the range of Base stations. Limited availabity. Unavailable in aircrafts. SECURITY: Less secure(passes through the walls).
Ppt on Li-Fi Technology by Manisha Reddy
Ppt on Li-Fi Technology by Manisha Reddy
HOW LI-FI WORKS ? Operational procedure is very simple, if the led is on, you transmit a digital 1, if its off you transmit a 0. The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data. Hence all that is required is some LEDS and a controller that code data into those LEDs.
Radio Waves Infrared Rays Visible Rays Ultraviolet Rays X- Rays Gama Rays Gama rays cant be used as they could be dangerous. X-rays have similar health issues. Ultraviolet light is good for place without people, but other wise dangerous for the human body. Infrared, due to eye safety regulation, can only be used with low power. HENCE WE LEFT WITH THE ONLY THE VISIBLE - LIGHT SPECTRUM.
WORKING PROCESS
Ppt on Li-Fi Technology by Manisha Reddy
DIFFERENCES BETWEEN THE TECHNOLOGIES
POTENTIAL APPLICATION OF LI-FI Li Fi technology is still in its infancy .However some areas where it seems perfectly applicable are:- TRAFFIC LIGHTS Traffic lights can communicate to the car and with each other. Cars have LED-based headlights, LED-based back lights, and cars can communicate with each other and prevent accidents in by exchanging information.
POTENTIAL APPLICATION OF LI-FI INTRINSICALLY SAFE ENVIRONMENTS Visible Light is more safe than RF, hence it can be used in places where RF can't be used such as petrochemical plants , airplanes etc.
PUBLIC INTERNET HOTSPOTS There are millions of street lamps deployed around the world. Each of these street lamps could be a free access point.
POTENTIAL APPLICATION OF LI-FI ON OCEAN BEDS Li-Fi can even wok underwater were Wi-Fi fails completely, thereby throwing open endless opportunities for military/navigation operations.
ADVANTAGES Larger bandwidth (10,000 times the radio bandwidth) High efficiency More availability Highly secure
DISADVANTAGE PRESENCE OF LIGHT IS ESSENTIAL
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 hotspots to transmit wireless data.
REFERENCES: Google Wikipedia Lificonsortium.org Purevlc.com ebookbrowse.com/an002-instrumentlighting-pdfd20428293
Ppt on Li-Fi Technology by Manisha Reddy

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Ppt on Li-Fi Technology by Manisha Reddy

  • 2. WHAT IS LI FI ? LI-FI is transmission of data through illumination ,sending data through a LED light bulb that varies in intensity faster than human eye can follow.
  • 3. 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 HASS
  • 5. PRESENT SCENARIO Radio 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 .
  • 7. CAPACITY: Radiowaves. Cost and Expensive. Less Bandwidth compared to other spectrums. Insufficient spectrum for increasing data. EFFICIENCY: Millions of basestations consume huge amount of energy for 1.Transmitting the radio waves. 2.To cool the base station cabins. 5% Efficiency.
  • 8. AVAILABILITY: Available within the range of Base stations. Limited availabity. Unavailable in aircrafts. SECURITY: Less secure(passes through the walls).
  • 11. HOW LI-FI WORKS ? Operational procedure is very simple, if the led is on, you transmit a digital 1, if its off you transmit a 0. The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data. Hence all that is required is some LEDS and a controller that code data into those LEDs.
  • 12. Radio Waves Infrared Rays Visible Rays Ultraviolet Rays X- Rays Gama Rays Gama rays cant be used as they could be dangerous. X-rays have similar health issues. Ultraviolet light is good for place without people, but other wise dangerous for the human body. Infrared, due to eye safety regulation, can only be used with low power. HENCE WE LEFT WITH THE ONLY THE VISIBLE - LIGHT SPECTRUM.
  • 15. DIFFERENCES BETWEEN THE TECHNOLOGIES
  • 16. POTENTIAL APPLICATION OF LI-FI Li Fi technology is still in its infancy .However some areas where it seems perfectly applicable are:- TRAFFIC LIGHTS Traffic lights can communicate to the car and with each other. Cars have LED-based headlights, LED-based back lights, and cars can communicate with each other and prevent accidents in by exchanging information.
  • 17. POTENTIAL APPLICATION OF LI-FI INTRINSICALLY SAFE ENVIRONMENTS Visible Light is more safe than RF, hence it can be used in places where RF can't be used such as petrochemical plants , airplanes etc.
  • 18. PUBLIC INTERNET HOTSPOTS There are millions of street lamps deployed around the world. Each of these street lamps could be a free access point.
  • 19. POTENTIAL APPLICATION OF LI-FI ON OCEAN BEDS Li-Fi can even wok underwater were Wi-Fi fails completely, thereby throwing open endless opportunities for military/navigation operations.
  • 20. ADVANTAGES Larger bandwidth (10,000 times the radio bandwidth) High efficiency More availability Highly secure
  • 22. 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 hotspots to transmit wireless data.
  • 23. REFERENCES: Google Wikipedia Lificonsortium.org Purevlc.com ebookbrowse.com/an002-instrumentlighting-pdfd20428293