17th ISTE NATIONAL CONVENTION. “SUSTAINABLE DEVELOPMENT THROUGH INNOVATIVE TECHNOLOGY”

ISTE 01

“WIRELESS COMMUNICATION”-By Vivek Srivastva

ABIT,Cuttack

Overview:INTRODUCTION TO WIRELESS COMMUNICATION:

HISTORY & APPLICATION OF WIRELESS COMMUNICATION:

4 ISSUES WITH RADIOWAVE:

ALTERNATIVE FOR RADIO WAVE:

INTRODUCTION OF LI-FI:

COMPARISON WITH WI-FI:

APPLICATION OF LI-FI:

LI-FI FOR SUSTAINABILITY:

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1. WIRELESS COMMUNICATION .`

Wireless communication is the transfer of information between two or more points that are not connected by an electric conductor.

- PRESENTED BY:

VIVEK KUMAR(CSE,ABIT)

PAWAN KUMAR(CSE,ABIT)

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04HISTORY & APPLICATION OF WIRELESS COMMUNICATION.

Wireless communication was introduced around 1880. Marconi and Graham bell introduced wireless communication.

Applications are: Bluetooth wi-fi (internet connection) mobiles remote and many more.

05ISSUES WITH RADIO WAVECAPACITY

WITH THE ADVENT OF NEW TECHNOLOGIES LIKE 3G ,4G WE ARE RUNNING OUT OF SPECTRUM. THAT’S WHY RADIO WAVES ARE NOW BECOMING EXPENSIVE.

EFFICIENCY

THERE ARE 1.4 MILLIONS CELLULAR RADIO BASE STATIONS .

EFFICIECY OF EACH BASE STATION IS JUST 5%.

MOST OF THE ENERGY IS NOT USED FOR TRANSMISSION BUT RATHER FOR COOLING DOWN THE BASE STATION.

06ISSUES WITH RADIO WAVE

SECURITY

RADIO WAVES CAN PENETRATE THROUGH WALLS AND HENCE CAN BE INTERCEPTED.

ANYONE WITH KNOWLEDGE AND BAD INTENTION CAN MISUSE IT.

AVALILABLITY

WE HAVE TO SWITCH OFF MOBILES IN AIRCRAFTS.

IT IS ALSO NOT ADVISABLE TO USE MOBILES AT PETROL PUMPS.

07BUT ,WIRELESS COMMUNICATION PRODUCES

HARMFUL RAYS (RADIO WAVE) .

What than ? …..

08ALTERNATIVE OF RADIO WAVES ?

CAN IT BE INFRARED WAVES ? ----- NO

INFRA RADIO WAVES ARE HARMFUL FOR OUR EYES HENCE USED TOVERY LOW POWER.

CAN IT BE ULTRA VIOLET RAYS ? ----- NO

UV RAYS ARE HARMFUL FOR OUR SKIN AND CANNOT BE USED FOR LONG DURATION.

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CAN IT BE GAMMA RAYS ? ----- NO

GAMMA RAYS ARE RADIOACTIVE AND ARE DANGEROUS.

CAN IT BE X-RAY S ? ----- NO

Health problems so can’t be used.

ALTERNATIVE OF RADIO WAVES

SO WE ARE LEFT ONLY WITH VISIBLE LIGHT SPECTRUM.

L I G H T-F I D E L I T Y.

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Visible light communication

INTRODUCTION TO LI-FI

LI-FI IS A TECHNOLOGY THAT USES THE LIGHT EMITTING DIODES TO TRANSMIT THE DATA WIRELESSLY.

LI-FI IS FAST AND CHEAP OPTICAL VERSION OF WI-FI ,BASED ON VISIBLE LIGHT COMMUNICATION(VLC).

VLC IS A DATA COMMUNICATION MEDIUM,WHICH USES THE VISIBLE LIGHT BETWEEN 400 THZ (780 NM) AND 800 THZ (375 NM) AS OPTICAL CARRIER FOR DATA TRANSMISSION.

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LI-FI WORKING ENVIRONMENT 12

HOW DOES LI-FI WORKS ? 13

PRACTICAL IMPLIMENTATION OF LI-

FI 14

THESE LED’S VARIES IN INTENSITY (THAT IS GETS ON AND OFF) SO FAST THAT A HUMAN EYE CANNOT DETECT IT.

IF LED IS ON , THEN WE TRANSMIT A DIGITAL SIGNAL 1,AND IF THE LED IS OFF , THEN WE TRANSMIT A DIGITAL SIGNAL 0.

A CONTROLLER IS CONNECTED AT THE BACK SIDE OF THESE LED BULBS TO CODE DATA TO THESE LED’S.

15HOW DOES LI-FI WORKS ?

16Li-Fi VS Wi-Fi LI-FI

Li-Fi has a High speed data transfer rate over 1Gbps +.

LI-FI Uses the Visible Light of the electromagnetic waves.

Li-fi is cheaper than wi-fi.

Li fi has almost no limitation on capacity.

WI-FI

Wi-Fi has a data transfer rate of maximum 54Mbps.

WI-FI use the radiowaves portion of the Electromagnetic waves.

Costlier than li fi.

Wi-fi is closed to full capacity.

171. CAPACITY:

10000 TIMES MORE SPECTRUM THAN RW.

LIGHT BOXES ARE ALREADY PRESENT, SO INFRASTRUCTURE IS AVAILABLE ALREADY AND INSTALLED.

2. EFFICIENCY:

HIGHLY EFFICIENT BECAUSE LED CONSUMES LESS ENERGY.

3. AVAILABLITY:

LIGHT IS PRESENT EVERYWHERE.

DATA IS PRESENT WHERE LIGHT IS PRESENT.

OVERCOMING THE FOUR ISSUES WITH RW IN LI-FI

184. SECURITY:

LIGHT WAVES DOESNOT PENETRATE THROUGH WALLS.

HENCE THEY CAN’T BE INTERCEPTED.

OVERCOMING THE FOUR ISSUES WITH RW IN LI-FI

19WE CAN USE LI-FI IN HOSPITALS AND AIRCRFTS ALSO.

CHEAPER THEN WIFI , SINCE VISIBLE LIGHT SPECTRUM IS A FREE SPECTRUM BAND.

NO LICENSE NEEDED.

THOUSANDS AND MILLIONS OF STREET LAMPS CAN BE CONVERTED TO LI-FI SPOTS.

CAN CONTROL ROAD ACCIDENTS BY USING CHAIN TRAFFIC SIGNALS .

CAN BE USED AS ONLINE OR INTERNET CAMERA.

ADVANTAGES OF LI-FI

20CONCLUSION

The best way to predict the future is to create it and future belongs to those who creates it.

The possibilities are numerous and can be explored further .If this Technology can be put into practical use , Every bulb or LED can b e used something like a wi -fi hotspots to transmit wireless data. we will proceed toward the cleaner, greener, safer and brighter future.

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ANY QUERIES ?

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Thanks for your Attention !!

Li-fi