# LI-FI (Light Fidelity): Future of Data Transmission

August 8, 2018

There was a time when we used to transmit data through Bluetooth or such sort of communication in which data transmission rate was negotiable but with the time, the wireless technology has grown eventually and compatible technologies with faster data rates were introduced such as NFC, Wi-Fi. With these technologies now the data transformation was easier than ever. But now there has a new technology introduced in the market which will overtake the leading Wi-Fi Technology which is Li-Fi  Technology. What is Li-Fi and how it works and all the questions are answered in this article.

Credits:CircuitDigest

### Li-Fi Technology:

Basically, Li-Fi is a wireless data transmission technology that uses light rays as the source of data transmission. In 2011, in the ted talks, Harald Hass has introduced us to the emerging and futuristic data transmission technology called LIFI. The full form of LIFI is Light Fidelity which sounds similar to WIFI (Wireless Fidelity) and LIFI works on the VLC(Visible Light Communication). The data transmission rates of LiFi are effectively faster than all other wireless technologies including WIFI, NFC and so on. The study says that WIFI affects our health as well. Many websites and articles have described the harmful effect of WIFI on our health. Wireless routers – as well as Bluetooth and similar wireless systems – give off electromagnetic radiation in the low-gigahertz frequency. This level is considered potentially dangerous to people [1].  In LiFi, the transmission of data is done through the light rays and not by the electromagnetic radiation, thus it’s safe to use the LIFI.

### How LI-FI Works?

Credits: KimKomando

In this light-based data transmission technology, the light rays have been used to transfer the data rather than the electromagnetic radiation. The idea of says that for this technology we don’t need to apply any extraordinary infrastructure instead the infrastructure is built all around us in form of lamps, street lights, in ceilings, in cars, bikes and all the places that have a single LED bulbs. The Harald Hass has explained in his presentation that these chips can be set into the LED bulbs and thus it can be used for transmission of data. Now there is no need to explain the availability of LEDs around us.

### How Is It Better?

Credits: DIFFERENCEbtw

Today the fastest medium of data transmission is WIFI so we will compare this technology with the latest and fastest available technology WIFI. So how LIFI is better than WIFI? There are certain criteria, on behalf of which we will decide that how it is better than the available technologies.

• #### Availability and setup:

Since the LIFI technology is based on data transmission through lights and thus the infrastructure of LED bulb is already very strong. Thus it can be available from a street lamp to a light implemented in a flight. On one hand, where WIFI needs several sorts of a router and complex setup, the LIFI can be set up easily into any tiny LED bulb.

• #### Privacy:

While using WIFI the privacy is a primary issue because anyone with great skills and bad intentions can access your data through your WIFI if he is in the range of your WIFI. But in the case of LIFI, privacy is a huge advantage as the light cannot be surpassed through the wall and thus no other person can access to your data or your network unless he is visible to you.

• #### Speed:

In the sense of speed, WIFI was the primary choice of everyone till yet, but not anymore because with this technology the transmission rate of data with the data transmission rate of maximum 52 Mbps, but with the LIFI technology the data transmission rate has jumped to the speed of up to 1 GBPS, which is rapidly fast than the WIFI.

• #### Totally Harmless:

As the WIFI constantly affects our health but at the same time LIFI is harmless to health, which is a pretty big advantage because the light does not impact on our body.

### Applications of LIFI:

There is a certain use of LIFI due to its availability and privacy. LIFI can be used at the places where these other technologies are not capable to reach such as underwater for instance we can provide an internet connection to the tiny submarines with LIFI and can explore the deep ocean. There are many users and applications of LIFI when some of them are listed below:

• LIFI technology can be used to give free internet access to the public by providing these chips in the street lights, so anyone who is under the light can use the internet.
• This technology can be used at the places where other technologies are not capable to reach, such as underwater. With LIFI underwater data transmission is possible.
• LIFI can be used in automotive cars to sense the other car and avoid the accidents and at the same time it can communicate with devices such as Smartphone.
• It can be used to manage other lights remotely.

### LIFI in future:

Credits: DarkWebNews

All this features and applications that are listed above are written on the basis of Harald’s 2011’s presentation, after 4 years later in 2015 Harald surprised us once again with the concept of appending the solar panel as the input  source of Light rays. In result, the solar panel was harvesting energy and streaming the data at the same time. That means the supply of both energy and data transformation is combined into one. Well, that’s just the small step toward the infinite possibilities of this futuristic data transmission technology.

# References

 [1] “EMF Health Effects,” safespace, [Online]. Available: https://www.safespaceprotection.com/emf-health-risks/emf-health-effects/wi-fi-router-dangers/. [Accessed 08 August 2018].

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