What is Difference Between Lifi and Wifi?

Which generation do you belong to?

Gen X – sad, No Internet for them!

Millennials- “Getting started”

Gen Y- Founders of INternet

GEN Z-The one’s who had mobile internet access, INVENTION OF WIFI, etc.

Gen ALfa- The one’s who will enjoy and make use of the internet faster than ever before!

If You are from the present Generation and think that WiFi is the only latest model of internet service you are getting then you’re wrong my friend.

Have you ever heard of LiFi?

If no…then I’d say You should definitely know about it because you are missing out on an amazing invention.

If you want to Understand LiFI, in Lyman terms it means “Where there is a source of light there is an internet” and I guess we all know by now how fast LiFi might be compared to Wifi.

If you guessed the abbreviation of Lifi to be Light fidelity then congrats because you got it right.

We all know that in the current state the world is in, stopping the internet just for a minute or so, will cause have all around the world.

P.S: Currently the experiments are going on in countries like Netherlands.

What is Li-Fi?

Technically speaking, The Li-Fi communication system is efficient in the transmitting of data via light at high speeds. Currently, only LED lamps are being used for the transmission of data. It is bidirectionally networked.

With the above definition, you will have an idea about what Li-Fi is.

In this current society, every other house has a Wi-Fi router as the current generation is completely dependent on the Internet.

To know what is Li-Fi you must understand the concept of Wi-Fi, as Li-Fi is a little similar to Wi-Fi. Let’s study Wi-fi first,

What is Wi-fi?

Wi-fi stands for Wireless Fidelity. It is also called WLAN which stands for “WIDE LOCAL AREA NETWORK”.

What does Wi-Fi do and How is it Similar to Li-Fi?

Wi-Fi is a wireless method of transmission of data but the transmission is done through Radio Waves, whereas Li-Fi is also a wireless method of transmission of data but it uses light as a medium.

If the above concept is understood let us know more about Li-fi,

LiFi Full Form: The abbreviation of Li-Fi is Light Fidelity.

History of LiFi

Li-Fi was invented by Professor Harald Haas at TED Global Talk in July 2011, In this, he introduced “wireless data from every light”.

In 2012, Visual Light Communication (VLC) technology was put forth using Li-Fi.

In 2013 August, data rates of over 1.6 Gbit/s were practically exhibited over a single color LED.

By Using LED Bulbs or lamps as Wi-Fi access point equivalent (A device which does not require other devices to help in accomplishing the task is called Standalone devices which allows devices such as laptop computers to get connected and communicate with a wired computer network so to set a proper and secure communication with the server

you have to follow some final steps i.e access points). By conducting several research projects in the EU, US, and EdinburghUniversity in Scotland led to the invention of Li-Fi.

How does Li-Fi Work?

Devices such as mobile phones and PCs are built-in with a transmitter (to send light signals) and a receiver (to receive signals) from the light source such as LED Lamps.

The Intensity of the LED lamp’s light changes a billion times per second i.e faster than the eye and with this change, the data transmission is done and vice-versa through the generated digital signal.

To circumvent from light to light, different lights are added to a single network so that you may not lose connection. To use a Li-Fi network you don’t need to be under a light source. Due to the change in Intensity, the digital signal generated for transmission is also transferred by beam off walls and other exteriors.

Li-Fi network needs internet service provider for homes and offices etc. To supply internet via wires. To supply wireless Internet connections to devices Li-Fi can be installed at home and offices.

When power is supplied to the LED lamp, photons (stream of light) are released from the Lamp.

Lamps are semiconductors in nature indicates that at high speed the brightness of the light flowing through them can be changed.

This sends a signal by updating the light at different rates and this signal received explains the changes in the signal(light intensity) as data by the detector.

The Intensity modulation is indiscernible (it cannot be perceived by the naked eye), and thus communication is as smooth as other radio systems, in turn allowing the user to be able to access the internet wherever Li-Fi enabled light is present. With this technique, data can be sent and received by the LED light bulb at high speeds. So this is how Li-Fi works?

Advantages of LiFi

Transmission of data is fast and easy
Its bandwidth is 10,000 times more that than the radio waves.
Mostly traveled at a great speed by LED lights so it is low in cost.
It is time-saving because it downloads high-resolution film in a max of 30 seconds.
It provides high security compared to Wi-Fi because lights cannot penetrate walls.
It has low Implementation.
This technology uses Visible Light Spectrum (VLC) which is not yet utilized.
It will solve issues associated with the insufficiency of radio information measure low power consumption.
It is not influenced by the flesh
It is comfortable for human eyes.
Allows high peak knowledge rates(10Gps)
Installation is easy
It is utilized in ICT applications
It avoids RF spectrum and utilizes optical spectrum.
It is offered by replacement ancient LEDS with Li-Fi compatible bulbs
It can’t be accessed simply

Disadvantages of LiFi

The Presence of light is important because its transmission medium is light.
The Line of sight should be there.
VLC system takes High Installation Costs.
External Interference of light such as Opaque Material, Sunlight, etc
Can cause an interruption in communication.
Works better with LEDs compared to bulbs
Higher Initial Cost.
Cannot be used in the outdoor environment.
It will waste lots of energy because only to access the Li-Fi Internet the lights should be on for the whole day.
Though the installation is simple, the system requires a whole new infrastructure.
Access use of Wi-Fi prevents the use of Li-Fi.

What is Difference Between LiFi and WiFi?

LiFi	WiFi
An Abbreviation is a Light Fidelity	An Abbreviation is Wireless Fidelity
Invented by Herald Hass in July 2011.	Invented in 1991 by prof NCR Corporation.
Transmission of data is done through lights.	Transmission of data is done through radio waves.
Data transmission is highly secured	Data transmission is secured but it requires more techniques to achieve security
Data transfer speed is 1Gps	Data transfer speed is up to 2Gbps
Technology presents IrDa Compliant devices.	Technology presents WLAN 802.11/b/g/n/ac/d standard-compliant devices.
Frequency of operation 10, 000 times frequency spectrum of the radio.	The frequency of operation is 2.4Ghz, 4.9Ghz, and 5Ghz.
Coverage Distance is Coverage distance is about 10 meters	Coverage distance is about 32 meters(vary based on transmit power and antenna type)
Data density work with a high-density environment	work in the less dense environment due to interference related issues
Bare minimum Components used are LED bulb, LED driver, and photodetector	Bare minimum components used are Routers, Modems and access points
Applications are Used in airlines, undersea exploration, etc.	Applications are used for internet browsing with the help of a wifi hotspot.
Power consumption is low.	Power consumption is high.
Bandwidth is unlimited.	Bandwidth is limited.
The spectrum used is visible light.	The spectrum used is RF.
It is low maintenance.	It is high maintenance.
Due to interference, it can work in a dense region.	Due to interference, it can work in less dense regions.
Due to interference, it can pass through seawater.	Due to interference, it cannot pass through seawater.
System components are Lamp Drivers, LED bulbs, and light detectors	System components are router have to be installed to provide connection to the laptop, phones, etc.

So with this is the difference between Wi-Fi and Li-Fi.

Now as we learned about Li-Fi and Wi-Fi there is another wireless connection that helps in the exchange of data and that is called Bluetooth.

Here the major difference is Bluetooth is only used for in exchange of data whereas Li-Fi and Wi-Fi is used to access and communicate via the internet

So let us know about Bluetooth and how does it differ from Li-Fi.

What is Bluetooth and how does it differ from Li-Fi?

Bluetooth is a wireless short-range technology that helps in the exchange of data between 1 fixed and other mobile devices by using UHF radio waves.

Bluetooth was proposed by Jim Kardach of Intel in 1997, he

developed a system that would allow mobile phones to communicate with computers and the first client Bluetooth device was launched in 1999, it had been a hands-free mobile receiver that earned the “Best of show Technology Award” at COMDEX, the primary Bluetooth mobile was the Ericsson T36 however it had been the revised T39 model that truly created it to store shelves in 2001

Now let us see the difference between Bluetooth and Wi-Fi?

Difference between Bluetooth and Wi-Fi

Bluetooth	WiFi
It is used in an exchange of data.	It is used in communication.
Its frequency is up to 2.4GHz.	Its frequency is 2.4GHz.
Its range is 10 meters.	Its range is 100 meters.
Power consumption is low.	Power consumption is high.
Primary devices are PDAs, consumer electronics, office, industrial automation devices.	Primary devices are notebook computers desktop computers and servers.
Primary users are travelers, office, Industrial workers, and electronic consumers.	Primary users are corporate offices, campuses, business conference venues, etc.
Nodes per master are7.	Nodes per master are 32.
Battery life is 1 week.	Battery life is hours.

The Basic cell is Piconet	The Basic cell is BSS
Max signal rate is 1Mb/s	Max signal rate is 54Nb/s
Nominal TX Power is 0-10dBm	Nominal TX Power is 15-20 dBm
The modulation type is GFSK	The modulation type is BPSK, QPSK, COFDM, CCK.
IEEE spec is 802.15.1	IEEE spec is 802.1 lab/g
Bluetooth has no full form	While wi-fi is wireless fidelity
It requires a Bluetooth adapter on all devices for connectivity	Whereas it requires a wireless adapter on all devices and a wireless router for connectivity
The security level is low compared to Wi-Fi	Better security than Bluetooth
Bluetooth is low in flexibility	Wi-Fi is high in flexibility
In Bluetooth, limited users are supported	In Wi-Fi large amount of users are supported