By-R.Mostafijur&A.Ahmed

Data through illumination

Brightening up the future....

CONTENT►INTRODUCTION TO Li-Fi

►PRESENT SCENARIO►FOUR CONCERNED ISSUES WITH RADIO WAVES●Capacity●Efficiency●Availability●Security►LIGHT FOR WIRELESS COMMUNICATION●What We Have To Do ?●How We Do This?►IS IT A PROVEN TECHNOLOGY?▶Overcoming the four issues with RW in Li-Fi►APPLICATION OF Li-Fi►CONCLUSION

Introducing Li-Fi

Introduction to Li-Fi

LiFi is transmission of data through illumination by taking the fiber out of fiber optics by sending Data through a LED light bulb that varies in intensity faster than the human eye can follow..

We have 1.4 million cellular radio waves base stations deployed

We also have over 5 billion of mobile phones Mobile phones transmits more than 600 TB of data Wireless communication has become a utility like

electricity & water We use it in out everyday life , in our private life ,

business life Currently WiFi uses Radio Waves for

communication It is important to look into this technology which

has become fundamental to our life

Present Scenario

1.Capacity We transmit wireless data through radio

waves Radio waves are limited Radio waves are scar and expensive We only have a certain range of it With the advent of the new generation

technologies like 2g , 3g , 4g and so on we are running out of spectrum

FOUR ISSUES WITH RADIO WAVES

2.Efficiency:There are 1.4 million cellular radio base stations.They consume massive amount of energymost of this energy is not used for transmission but for cooling down the base stationsefficiency of such a base station is only 5% and that raise a very big problem

3. Availability:

Availability of radio waves or RW signals causes another concern

We have to switch off our mobile devices in aero planes

It is not advisable to use mobiles at places like petrochemical plants and petrol pumps

4.Security:

Radio waves penetrates through walls They can be intercepted If someone has a knowledge and bad

intentions than he may misuse it

Light has been around for billions of years It has created us , created life and has created

all stuffs of life FLICKRING lights are annoying but they may

have an upside . Visible light communication (VLC) uses rapid pulses of light to transmit information wirelessly . Now it may be ready to complete with conventional Wi-Fi.

So it is inherently safe to use and would be great if we can use it for our wireless communication.

Light For Wireless Communication

We have to replace inefficient fluorescents lights with this new dignitaries of LED lights

It is a semi conductive e-device The LED bulb will hold a micro chip that will

do the job of processing the data Light intensity can be modulated at very

high speeds to send data by tiny changes in amplitude.

What We Have To Do?

Remote control has an IR-LED It creates a signal data stream High speed data rates of 10000 bps to

20000 bps Replace remote control with light box With this technology we transmits 1000’s of

data stream in parallel at high speeds We termed this technology as special

modulation

How We Do This?

Remote control Data via LED

Yes this is already proven! Harald Haas demonstrated his invention

using an ordinary table lamp that successfully transmitted data at speeds exceeding 10 mbps using light waves from LED light bulbs to a computer located below the lamp

To prove that the light bulb was the source of the data stream he periodically blocked the beam of light , causing the connection to drop!

Is It a Proven Technology?

1.Capacity: 10000 times more spectrum than RW Light box are already present So we have the infrastructure available and already installed.

2.Efficiency: Data through illumination and thus data transmission comes for free. LED light consumes less energy. Highly efficiency.

Overcoming the four issues with RW in Li-Fi

3.Availability: Everywhere light is present.

4.Security: Light waves doesn’t penetrates through walls. Can’t be intercepted and misused. Data is present where there is light.

At present its applications ate beyond imagination but still if to think about few then they are: Can be used in the place where it is difficult to lay the

optical fiber like hospitals. In operation theatre Li-Fi can be used for modern medical instruments.

In traffic signals Li-Fi can be used which will communicate with the LED lights of the cars and accident numbers can be decreased.

Applications of Li-Fi

Thousand and millions of street lamps can be transferred to Li-Fi lamps to transfer data.

In aircraft Li-Fi can be used for data transmission.

It can be used in petroleum chemical plants where other transmission or frequencies could be hazardous.

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 Wi-Fi hotspot to transmit wireless data and we will proceed towards the Cleaner ,Greener ,Safer and Brighter future.

Conclusion

Thank You

Any Question?