LiFi - This is the Fastest Internet in the World (224GBPS) - Easiest Explanation Ever!

Summary

This 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

• 📶 WiGig WiFi can achieve data transfer speeds of 7,314 MBPS or 7.14 GBPS, enabling the download of seven movies in a second.
• 💡 LiFi technology can reach data transfer speeds of 102,400 MBPS or 100 GBPS, allowing the download of 100 movies in one second.
• 🔄 LiFi uses LED lights to transmit data, unlike WiFi which uses radio waves.
• 📱 Data transmission involves converting binary data into electromagnetic waves (radio waves for WiFi, light waves for LiFi).
• 🌈 LiFi technology converts binary data into visible light using LEDs, which can switch on and off at high speeds to represent binary data.
• 🔦 LiFi requires a photodiode to receive light and convert it back into electrical signals.
• 🚀 LiFi can achieve data transfer speeds up to 224 GBPS under special conditions.
• 🔧 WiFi is facing challenges like Spectrum Crunch due to increased internet users and limited radio frequencies.
• 🏥 LiFi is suitable for environments sensitive to electromagnetic interference, such as hospitals and aircraft cabins.
• 🌍 LiFi's visible light spectrum is 10,000 times larger than the radio frequency spectrum, reducing the risk of Spectrum Crunch.
• 💡 LED lights used for LiFi are energy-efficient, making LiFi a low-energy alternative to WiFi.
• 🏞️ LiFi can be used in areas where radio waves fail, such as underwater.
• 💲 LiFi is expected to be cheaper than WiFi due to the widespread availability of LED lights.
• 🔗 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

00:00

🚀 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.

05:03

🌐 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.

Keywords

💡WiFi

WiFi is a wireless technology used to transfer data between computers, mobile phones, and other devices using radio waves. It allows us to access the internet without physical connections. In the video, WiFi is explained as the current standard for wireless communication, transmitting data via electromagnetic waves at high speeds.

💡LiFi

LiFi, short for Light Fidelity, is a wireless communication technology that uses visible light to transmit data. Introduced by a professor at the University of Edinburgh, LiFi is capable of achieving data transfer speeds significantly faster than WiFi. The video highlights LiFi's potential to overcome WiFi limitations, using LED lights to encode data into light waves.

💡Binary Data

Binary data consists of zeros and ones (0s and 1s), the basic language of computers. It is essential for digital communication, including WiFi and LiFi, where data is converted into binary form before being transmitted. The video explains how both technologies use binary data to encode and decode information for transmission.

💡Visible Light Communication (VLC)

VLC is a technology that uses visible light to transmit data. LiFi employs VLC by converting binary data into light waves within the visible spectrum. The video describes VLC as a key component of LiFi, utilizing LEDs to transmit data at high speeds through visible light.

💡LED (Light Emitting Diode)

An LED is a semiconductor device that emits visible light when an electric current passes through it. In the context of LiFi, LEDs are used to transmit data by rapidly changing their brightness. The video explains that LEDs can blink on and off millions of times per second to represent binary data, enabling high-speed data transmission.

💡Photodiode

A photodiode is a semiconductor device that detects light and converts it into an electrical current. In LiFi technology, photodiodes act as receivers, capturing light signals from LEDs and converting them back into binary data. The video emphasizes the role of photodiodes in receiving and decoding data transmitted through visible light.

💡Spectrum Crunch

Spectrum Crunch refers to the scarcity of available radio frequencies for wireless communication due to the increasing number of users. The video mentions this problem as a limitation of WiFi, where the limited radio frequency spectrum struggles to meet growing data demands. LiFi's use of the much larger visible light spectrum is presented as a solution to this issue.

💡Electromagnetic Interference (EMI)

EMI is unwanted disturbance in an electrical signal caused by external sources. WiFi signals can be disrupted by EMI, making them less reliable in certain environments like hospitals and aircraft cabins. The video explains that LiFi, which uses light instead of radio waves, is immune to EMI and can be used in these sensitive areas without interference.

💡Data Transmission Speed

Data transmission speed is the rate at which data is transferred from one device to another. The video compares the speeds of WiFi and LiFi, noting that LiFi can achieve speeds up to 100 GBPS or even 224 GBPS in special cases, far surpassing WiFi's capabilities. This speed enables faster downloads and data transfers.

💡Energy Efficiency

Energy efficiency refers to the amount of energy required to transmit data. The video states that LiFi is more energy-efficient than WiFi, using less power for data transmission. This makes LiFi a more sustainable option, with lower environmental impact and operational costs compared to WiFi.

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 world’s 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.

How’s this incredible internet speed possible?

Well, it is possible with LED lights.

To understand LiFi, let’s have a quick look at WiFi.

Let’s 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

friend’s phone?

You can see that there are no wired connections between the phones.

It means your message made an adventurous journey through air.

But how’s 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 it’s 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 what’s WiFi.

Let’s 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.

We’ve 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, it’s 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 that’s 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 LiFi’s 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 can’t 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.

‘Since 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 technology’.

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.

That’s 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 can’t 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!