LiFi Technology

Have you wondered how much speed is provided by your Internet Service provider?

Let’s consider around 4-8 Mbps.

Don’t you want that your data should transfer or receive at the speed of light? Or can’t we make Light as an Internet?

Yes, you have heard it right “Light as an Internet”.

We have achieved great success in technology and yet to achieve more.

When Harald Haas was giving his TED’s Talk speech in Edinburgh, “Wireless Data from Every Light Bulb.” He introduced the term Li-Fi. Haas was even dubbed “Father of Li-Fi” for his work.

When it has been tested for the first time, it works unexpected and speed of internet was 224Gbps.

Who makes Li-Fi technology?

PureLifi made Li-Fi technology in 2012 after four years of research, Haas set up the company PureLiFi with the aim ‘to be the world leader in Visible Light Communications technology.

Li-Fi Technology- Everything You Need to Know

Li-Fi-light fidelity is similar to Wi-Fi technology and it is one of the future wireless communication technologies. The main feature of this technology includes fully networked, bidirectional and high-speed wireless. Nowadays, the most trending domain in wireless communication is Wi-Fi and internet users are also being increased every year. For obtaining better speed, efficiency, bandwidth, Li-Fi technology has evolved. The data transmission in this technology can be done using light because the light intensity changes quicker than the human eye for capturing. The range of data transmission in Li-Fi is 100 times faster than Wi-Fi.

Light fidelity (Li-Fi) refers to 5G visible light communication. It uses light from light-emitting diodes as a medium to deliver data to networked, mobile, high-speed communication in a similar manner to Wi-Fi. Li-Fi is used to off-load data from existing Wi-Fi networks. Li-Fi can be used as internet access points. To transmit information from one system to another system, it uses Visible Light Communication (VLC). This system is based on white LEDs using THz visible light spectrum in provision of both lighting and wireless access. Visible light communications (VLC) signals work by switching bulbs on and off.

Li-Fi is a form of VLC, so by definition, it has a transmitter and a receiver and uses light for the transmission of data. Li-Fi networks are bi-directional, which means that an uplink and a downlink can both be formed simultaneously between the transmitter and receiver. This is what makes it so suitable for internet communication. It is to be noted that Li-Fi isn’t a different way of getting internet, it’s a different way for deploying internet.

Working and Components of a Li-Fi System (Source: https://lifi.co/)

 

Differences between Li-Fi & Wi-Fi:

The Differences between Li-Fi and Wi-Fi include the following.

• The Bandwidth Expansion of Wi-Fi technology is limited and exceptional for Li-Fi
• The Speed of the Wi-Fi is150 Mbps and >10 Gbps for Li-Fi
• The Data Density of Wi-Fi technology is low and high for Li-Fi
• The Range of Wi-Fi is medium and low for Li-Fi
• The Security of Wi-Fi is medium and excellent for Li-Fi
• The power availability of Wi-Fi is low and high for Li-Fi
• The ecological impact of Wi-Fi is medium and low for Li-Fi
• The cost of the Wi-Fi is medium and low for Li-Fi
• The network topologies of Li-Fi and Wi-Fi technologies is a point to point

Advantages of Li-Fi:

The Differences between Li-Fi and Wi-Fi include the following.

• Speed-The speed of the Li-Fi is very high, and we can watch the videos without buffering.
• Security- The light of the Li-Fi doesn’t run through the partition; therefore, it is more protected and hacking is not possible.
• Risk-free-Li-Fi utilizes light waves which are harmless.
• Consistent- The data transfer is more protected.

Disadvantages of Li-Fi:

• Apart from several benefits, Li-Fi technology is facing several problems. It requires LOS (line of sight), as well as the receiver, would not be a move inside.
• The main problem is how the receiver will send the data back to the transmitter section.
• Another disadvantage of this technology is an interference of exterior light sources such as normal bulbs; sunlight in the lane of communication will cause intermission in the transmission.
• It doesn’t work in dim areas.

Since its introduction, Li-Fi has been popularized as the technology that would one day replace Wi-Fi and bring forth a new 5G era. This paradigm shift in wireless communication that Haas envisioned is very much a possibility, it simply has not arrived yet.

Li-Fi is where,  

“Light becomes data.”