Hello guys my name is Tushar Goyal
and...
before starting the seminar
Before starting the topic of the seminar
I would like to talk about Wi-Fi
so
we all know about Wi-Fi
Wi-Fi transforms the digital communication and
without this technology our current way of mobile life would be somewhat different and
also, Wi-Fi uses approximately of 60 percentage of the
whole Internet traffic
so
with all that being said
Wi-Fi still has some issues like
It's get Sketchy sometimes when the signal is veried....
..and it is less secure
because your signal can travel through walls and
Because your signal can travel through walls and
can easily be picked up by someone else so
The reason for that problem is that
Wi-Fi uses radio waves so
So the main issues are the Wi-Fi is not totally secure and it is highly congested
Which means actually I will talk about this term after a while
So how can we improve this technology and remove thess problem?
We should use something which is..
..cheap and secure and more robust for the transfer of the Internet data
so the answer for that question
is
LIGHT!!
so light is just perfect
 
because light comes under the electromagnetic spectrum just like the radio waves and
Also light has very high frequency than the radio waves
So the frequency of the light is ten thousand times greater than the frequency of the radio waves
and as you can see in this diagram that
this is the frequency of the radio waves and
This is the frequency of the visible region and
light falls under the visible region so which means that
Light is capable to transmit the very vast amount of data in a very less amount of time
 
A concept in which light is used as a medium to transfer the Internet data
So the concept in which light is used as a medium to transfer the Internet data is called
LIFI, or light fidelity
 
This is what my seminar is all about LIFI technology
So how does it works so before talking about the working of the LIFI, I would like talk about the working of the
Television through the remote controller,
so we all know that the remote control contains the infrared sensor
this is the remote controller and it contains a LED or which is of infrared sensor and
Basically switching on the light and switching off the light creates a single stream of data
Which can travel up to a speed of 20,000 bits per second.
but in case of LIFI, we have thousands of streams of data
Which can travel at a very high speed.
in parallel.
So as you can see we have the LED here
The LED light here, and these are the thousands of stream of data
so LED is makes up from the semiconductor
The quality of the semiconductor semiconductor is that they can be modulated at a very high speed.
So this is the working of the LIFI
and this is the architecture of the LIFI
This is our whole internet system, which contains the server and the routers and
There is a Hardware called lamp driver.
and this is something which you have to install for the lifi
and all the wires of the LED get connected to that lamp driver
Okay
when the light falls to the receiver dongle
and the main concept here is that
the receiver should be directly under this LED light.
Or to the projected area of that LED lamp.
so that is how lifi works, and it is quite simple
Lifi I ignores the constant light, which means that
The constant light from that reason also comes here down to the receiver,
but the receiver will
Actually reject this constant light
because this receiver is only interested in the subtle changes
So what if light is turned off?
you might be wondering if the light has to return on whole the time for the working of the lifi
then how can we use this technology in the night time
so the answer of that question is...
You can actually dim the light down to a certain level
That the human eye cannot detect that the light is on
but the receiver can still read it
Okay
So the main attraction of LIFI are
The speed of lifi is hundred times faster than the Wi-Fi and
Also, the bandwidth is 10,000 times
larger than the Wi-Fi
so the term called CONGESTION
can be discussed here because
as we know
mainly the main
modes of communication or the main modes of digital communication uses radio waves okay,
Radio wave region is a very small region with a very small FREQUENCY
okay,
and it is actually get consistent now-a-days,
so it is compulsory for us to move on to the another technology.
So the bandwidth of the light region is ten thousand times wider than the radio waves
that's Something we can use for the good reason
recently
research at Oxford University
a professor find out that the speed of LIFI can be increased up to a speed of
224 gigabytes per second
It's a speed in which you can download 18 high-definition movies
18
high-definition movies in a one second so it's a quite interesting thing and
Whether or not servers are able to works at that speed
So there is a term called speed bottleneck for the servers
So we also have to work on the speed of the servers
The conclusion is that you can install these
Cheap light powered internet or the lifi everywhere
and there is a the concept of the Internet of Things (IOT)
a concept in which all the
Digital communication or the all the electronic devices will communicate to each other
Will become a reality
So if the LIFI become widely available
then believe me
this technology will change this era to a new world
where the internet and the transfer of the information will not be an obstacle so
There's all from my side. Thank you
you guys are awesome and...
THANKS FOR WATCHING
