LiFi - This is the Fastest Internet in the World (224GBPS) - Easiest Explanation Ever!
Summary
TLDRThis script introduces LiFi, a revolutionary data transmission technology using LED lights, offering speeds up to 100GBPS, far surpassing WiFi's 7.14GBPS. LiFi's visible light communication (VLC) converts binary data into light waves, providing a solution to spectrum crunch and enhancing security. Despite challenges like limited coverage and potential interference, LiFi promises lower environmental impact, reduced costs, and innovative applications like underwater or solar-powered data transmission, making it a promising complement to WiFi for future internet needs.
Takeaways
- đ¶ WiGig WiFi can achieve data transfer speeds of 7,314 MBPS or 7.14 GBPS, enabling the download of seven movies in a second.
- đĄ LiFi technology can reach data transfer speeds of 102,400 MBPS or 100 GBPS, allowing the download of 100 movies in one second.
- đ LiFi uses LED lights to transmit data, unlike WiFi which uses radio waves.
- đ± Data transmission involves converting binary data into electromagnetic waves (radio waves for WiFi, light waves for LiFi).
- đ LiFi technology converts binary data into visible light using LEDs, which can switch on and off at high speeds to represent binary data.
- đŠ LiFi requires a photodiode to receive light and convert it back into electrical signals.
- đ LiFi can achieve data transfer speeds up to 224 GBPS under special conditions.
- đ§ WiFi is facing challenges like Spectrum Crunch due to increased internet users and limited radio frequencies.
- đ„ LiFi is suitable for environments sensitive to electromagnetic interference, such as hospitals and aircraft cabins.
- đ LiFi's visible light spectrum is 10,000 times larger than the radio frequency spectrum, reducing the risk of Spectrum Crunch.
- đĄ LED lights used for LiFi are energy-efficient, making LiFi a low-energy alternative to WiFi.
- đïž LiFi can be used in areas where radio waves fail, such as underwater.
- đČ LiFi is expected to be cheaper than WiFi due to the widespread availability of LED lights.
- đ Combining WiFi and LiFi could revolutionize internet data transmission by leveraging the strengths of both technologies.
Q & A
What is the maximum data transfer speed achievable with WiFi WiGig?
-The maximum data transfer speed achievable with WiFi WiGig is 7,314 Mbps or 7.14 Gbps.
How many movies can be downloaded in one second with WiFi WiGig at its maximum speed?
-With WiFi WiGig at its maximum speed, you can download seven 1GB movies in one second.
What technology can achieve a data transfer speed of 100 Gbps?
-LiFi (Light Fidelity) technology can achieve a data transfer speed of 100 Gbps.
How many movies can be downloaded in one second using LiFi technology at 100 Gbps?
-With LiFi technology at 100 Gbps, you can download 100 movies in just one second.
How does LiFi technology utilize light to transmit data?
-LiFi technology uses visible light, typically emitted from LEDs, to transmit data by modulating the light intensity to represent binary data (0s and 1s).
What is the process called that converts binary data to a unique radio wave in WiFi technology?
-The process of converting binary data to a unique radio wave in WiFi technology is called Digital Phase Shift Keying.
What is the Visible Light Communication (VLC) in the context of LiFi technology?
-Visible Light Communication (VLC) is the method used in LiFi technology where binary data is converted into light waves or visible light for data transmission.
What are the advantages of using LiFi over WiFi in terms of spectrum availability?
-LiFi's visible light spectrum is 10,000 times larger than the radio frequency spectrum, which eliminates the possibility of Spectrum Crunch and provides more bandwidth for data transmission.
Why is LiFi technology considered more secure than WiFi?
-LiFi technology is considered more secure because it is harder to hack into a network that uses visible light, which is contained within a physical space and cannot pass through walls unlike radio waves.
What are some challenges faced by LiFi technology in terms of infrastructure and implementation?
-LiFi technology faces challenges such as the need for new infrastructure, the potential issue of light dimming and brightening affecting data transmission, and the limited coverage area compared to WiFi.
Why is LiFi technology considered environmentally friendly compared to WiFi?
-LiFi technology is considered environmentally friendly because it requires less overall energy for data transmission and has a lower environmental impact compared to WiFi.
Outlines
đ Introduction to High-Speed Data Transfer Technologies
This paragraph introduces the concept of high-speed data transfer technologies, focusing on WiFi and LiFi. It begins by highlighting the impressive speed of WiFi WiGig, which can download seven movies in a second, and then contrasts it with LiFi, which can download 100 movies in the same time frame. The explanation delves into the working principle of WiFi, which uses radio waves to transmit binary data, and then introduces LiFi, a technology that utilizes visible light emitted by LEDs to achieve even faster data transfer rates. The paragraph also touches on the potential of LiFi to revolutionize data transmission with its ability to reach speeds of up to 224GBPS, and addresses the increasing demand for data and the issue of spectrum crunch, which LiFi could help alleviate.
đ Advantages and Challenges of LiFi Technology
The second paragraph discusses the advantages and challenges associated with LiFi technology. It starts by pointing out the large visible light spectrum of LiFi, which is 10,000 times larger than the radio frequency spectrum, thus reducing the risk of spectrum crunch. The paragraph also mentions the security benefits of LiFi, as it is less susceptible to hacking compared to WiFi. It further explains that LiFi can be used in environments where electromagnetic interference is a concern, such as hospitals and aircraft cabins. The benefits of LiFi are also highlighted in terms of energy efficiency, environmental impact, and cost-effectiveness. However, the paragraph also acknowledges the challenges, such as the need for new infrastructure, potential disruptions from sunlight and other bright light sources, and the limited coverage area compared to WiFi. It concludes by suggesting that a combined use of WiFi and LiFi could lead to a significant advancement in internet technology.
Mindmap
Keywords
đĄWiFi
đĄLiFi
đĄBinary Data
đĄVisible Light Communication (VLC)
đĄLED (Light Emitting Diode)
đĄPhotodiode
đĄSpectrum Crunch
đĄElectromagnetic Interference (EMI)
đĄData Transmission Speed
đĄEnergy Efficiency
Highlights
7,314 Mbps or 7.14 Gbps is achievable with WiGig, allowing for the download of seven 1GB movies in one second.
LiFi Technology can achieve data transfer speeds of 102,400 Mbps or 100 Gbps, enabling the download of 100 movies in one second.
LiFi uses LED lights for high-speed data transmission, a concept introduced by a professor at the University of Edinburgh in 2011.
Binary data is converted into light waves in LiFi, a process known as Visible Light Communication (VLC).
Visible light, with a wavelength range of approximately 400nm to 700nm, is used for data transmission in LiFi.
LEDs can vary their brightness at a rate of 1,000,000 times a second to transmit binary data in LiFi.
Photodiodes are used as receivers in LiFi, converting light back into electric current to retrieve binary data.
LiFi can achieve data transfer speeds of up to 100 Gbps and, in special cases, up to 224 Gbps.
The increasing number of internet users worldwide may lead to Spectrum Crunch, affecting WiFi's ability to meet data demands.
LiFi's visible light spectrum is significantly larger than the radio frequency spectrum, reducing the risk of Spectrum Crunch.
LiFi provides a secure data transmission alternative, as it is less susceptible to hacking compared to WiFi.
LiFi can be used in environments sensitive to electromagnetic interference, such as hospitals and aircraft cabins.
LiFi requires less energy and has a lower environmental impact compared to WiFi.
LiFi is expected to be more cost-effective than WiFi, with potential for solar energy-powered data transmission.
Implementing LiFi on a large scale requires new infrastructure and addresses challenges such as light dimming and brightening.
LiFi's coverage area is limited to 10 meters, compared to WiFi's 20 to 100 meters, presenting a challenge for widespread adoption.
The coexistence of WiFi and LiFi is seen as a potential revolution in internet history, combining their respective advantages.
Transcripts
7,314 MBPS or 7.14 GBPS.
This is the speed of data transfer that you can achieve by
connecting your device to the worldâs fastest WiFi WiGig.
#taking typical movie size = 1GB This means you can download seven movies in
a second.
But what about 102,400 MBPS or 100GBPS.
This is the speed of data transfer that you can achieve with LiFi Technology.
With LiFi you can download 100 movies in just one second.
Howâs this incredible internet speed possible?
Well, it is possible with LED lights.
To understand LiFi, letâs have a quick look at WiFi.
Letâs say, you want to send a message to someone you care.
How would you do that in this digital world?
You heroically open your phone, connect to internet, open a messaging app, type your
message and click on send.
This whole messaging thing is colourful and feels simple.
But what just happened here?
How did the text from your phone travelled to your
friendâs phone?
You can see that there are no wired connections between the phones.
It means your message made an adventurous journey through air.
But howâs that possible?
Message is just a type of data.
Data can be audio, video, image and many more.
You take the help of your phone or any similar device to send the data.
It is impossible to send the data directly as shown here, because itâs not a letter
and your phone is not a post service.
So, data is converted into computer understandable data containing zeroes and ones
which is called binary data.
To send binary data, you can use WiFi or LiFi or other
technologies.
Currently, we are using WiFi.
Because it is a wireless technology used to transfer data
between computers, mobile phones and other devices which enables us to access the
internet.
In WiFi technology, we use electromagnetic waves which can travel through air at
enormous speeds.
Speaking more precisely, we use Radio Waves.
The binary data is converted to a unique radio wave with certain amplitude, frequency
and phase in a process called Digital Phase Shift Keying.
The radio wave travels through Air or even vacuum and reaches the other device
where it converts the radio wave into binary data and then into human readable
information like messages, images, audios etc.
We hope you understood whatâs WiFi.
Letâs talk about LiFi.
In 2011, a professor at university of Edinburgh introduced LiFi technology in a TED
Global talk.
LiFi stands for Light Fidelity from which we can sense that it is related to light.
Weâve been using the help of radio waves to transfer data between devices.
But LiFi uses visible light instead of radio waves
to transmit data.
In WiFi technology, binary data is converted to radio waves.
But in LiFi technology, binary data is converted into Light waves
or Visible light.
This is called VLC (Visible Light Communication)
Visible light is a section of the electromagnetic spectrum whose wavelength ranges
from 400nm to 700 nm approximately.
To send data using LiFi, we need a light source which acts as a transmitter.
As light sources, we use LEDs which are expected to be more efficient than
fluorescent lamps.
LEDs are the semiconductor devices that emit visible light when an
electric current passes through it.
LEDs can glow brighter and become dim a 1,000,000 (a million) times a second if you
vary the supply of electric current.
When LED is dim, itâs 0.
When it glows brighter it is 1.
This is how we send binary data through LiFi.
To receive data, we need a photodiode which acts as a receiver.
Photodiodes are also called light-detectors.
These are the semiconductor devices that receives light and converts it back into electric
current.
These also work at higher speeds like LEDs.
When the binary data is obtained, the device converts it back to
human readable information.
We can use an array of LED lights to achieve enormous data transfer speeds up to
100GBPS.
In some special cases, LiFi can send data with an astonishing speed of
224GBPS.
Now think about this.
Is it really necessary to think about LiFi?
You may think that WiFi is enough to satisfy our internet needs.
But thatâs wrong.
Due to the drastic increase of internet users all over the world, WiFi will not be able
to keep up with the demand of data.
Another major problem is, various government and private agencies rely on their
unique frequency ranges to send and receive data between themselves.
Due to the increase of users, this spectrum of frequencies is becoming very very dense.
This may lead to a problem called Spectrum Crunch.
It means, it becomes very difficult to provide sufficient frequencies to the new
users.
This phenomenon decreases the speed of data transmission through WiFi.
This warning of Spectrum Crunch was given by US
Federal Communications Commission.
Also, it becomes easier to hack into WiFi network which challenges the security of data
transmission.
But LiFiâs Visible Light spectrum is 10,000 times larger than radio frequency
spectrum.
This eliminates the possibility of Spectrum Crunch.
We need to worry about the situation called the Electromagnetic Interference or radio
Frequency Interference.
This is an unwanted disturbance to the radio signal caused by
external sources.
Places like Hospitals and Aircraft cabins are very sensitive to EM
interference.
So, we canât use radio waves for data transmission.
But we can use LiFi technology for communication at these places.
LiFi can be used anywhere including sea water where radio waves fail to travel.
n addition to that, the overall energy required for data transmission using LiFi is low
compared to that of WiFi.
The environmental impact of LiFi is low compared to that of
WiFi.
And LiFi is expected to be 10 times cheaper than WiFi.
âSince the data is transmitted through LED lights, and LED lights are almost
everywhere in the world, it is not such an expensive task to implement this technologyâ.
This statement was supported by the company pureLiFi established by the father of
LiFi Harald Has.
They are believing that, in the near future, it is possible to use solar energy to transmit
data.
Thatâs why the implementation of LiFi is such a considerable option for an enhanced
data transmission.
Along with these benefits, LiFi comes with some problems.
This is a new technology, so implementing this on a large scale requires new kind of
infrastructure which are not available now except LED lights.
Some studies say, the dimming and brightening of light can be a problem.
The photodiodes which receive light can detect the Sunlight and other forms of bright
light sources.
This can cause disruptions in the network.
However, this can be solved by using an optical fibre to filter the noise
from unwanted light sources.
The coverage area of WiFi is 20 to 100 meters whereas LiFi can cover only 10 meters.
There are some more challenges that we have to face before having LiFi in our homes.
LiFi may have a faster data transmission rate.
But, now, it canât replace the place of WiFi.
Both have pros and cons.
Scientist believe, if we use WiFi and LiFi together, it
will be a revolution in the history of Internet.
Thanks for watching!
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