What is LiFi?
LiFi is a wireless communication technology that utilizes light to transmit data and position between devices. The term was first introduced by Harald Haas during a 2011 TEDGlobal talk in Edinburgh.
LiFi is a wireless internet technology and has been developed that could provide a connection that is 100 times faster than traditional WiFi. Basically LiFi an acronym for Light Fidelity.
Li-Fi is a light communication system that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums. In its present state, only LED lamps can be used for the transmission of visible light
Explaining LiFi with a simple example.
Consider a LED bulb in your house. It just gives off light.
Consider a router in a common household. It is used to emit WiFi signal which enables us to use the internet wirelessly
Now imagine a scenario where a single light bulb can perform both the functionalities of a normal household LED bulb and a router. That’s LiFi for you.
How it works?
Li-Fi is a derivative of optical wireless communications (OWC) technology, which uses light from light-emitting diodes (LEDs) as a medium to deliver network, mobile, high-speed communication in a similar manner to Wi-Fi.
LEDs generate light flickering at a very high speed according to the input data signals. And, Photodetectors convert that rapidly fluctuating light to a fluctuating electrical signal which represents the data received. This fluctuation of light is so fast that the human eye cannot notice.
The working mechanism of LiFi is not so complicated. once you read it it is easy to understand.
LiFi vs WiFi
|Full form||Light Fidelity||Wireless Fidelity|
|Operation||Lifi transfers data using light with the help of LED bulbs.||WiFi transfers data using radio waves with the help of wifi router|
|Interference||Do not have any interference issues similar. to radio frequency waves.||will have interference issues from nearby routers|
|Technology||Present IrDA complaint devices||WLAN 802. 11a/b/g/n/ac/ad standard complaint devices|
|Application||Used in airlines, undersea explorations, operation theaters in hospitals, offices, and home premises for data transfer and internet browsing.||Used for internet browsing with the help of wifi routers or hotspot.|
|Advantages||Interference is less, can pass through salty seawater, works in density region.||interference is more cannot pass through sea water, works in less densy region|
|Privacy||Light is blocked by walls hence provide more secure data transfer.||Radio frequency signal can not be blocked by the walls and hence transfer of data is not secure.|
|Data transfer speed||about 1Gbps||WLAN-11n offers 150Mbps ,about 1-2Gbps can be achieved using WiGig/Giga-IR|
|Frequency of operation||10000X frequency spectrum of radio||2.4Hz,4.9GHz and 5GHz|
|Data density||Works in a high-density environment||Works in less dense enviroment due to interference related issues.|
|Coverage distance||about 10 meters||based on transmit power and antenna type. about 32 meters.|
|System components||Lamp driver, LED bulb and photodetector will makeup complete life system||requires routers to be installeed.|
- For workspaces and offices
- In offices and workspaces data needs to be shared between all the devices and. To make it secured and fast Lifi will be used and it will solve the problem of one who sits far away from the router range
- In the cafe, restaurants, and hotels
- In a cafe, restaurants, and hotels where customers seek free internet. always has to ask the waiter for the password. and cause of privacy issues cafe’s has to make their internet password secured so Lifi helps in such cases where a user without any efforts can use the password.
- Students and teachers can be part of a more active educational community in a classroom that is Li-Fi enabled. Students with devices such as smartphones or laptops can communicate with the teacher, or with each other, to create a more efficient learning environment. Teachers can be able to collaborate with students to help better understand the class material.
- Underwater applications
- Most remotely operated underwater vehicles (ROVs) are controlled by wired connections. The length of their cabling places a hard limit on their operational range, and other potential factors such as the cable’s weight and fragility may be restrictive. Since light can travel through water, Li-Fi based communications could offer much greater mobility. Li-Fi’s utility is limited by the distance light can penetrate water. Significant amounts of light do not penetrate further than 200 meters. Past 1000 meters, no light penetrates.
- IoT appliances are mostly under one roof so they can enhance the user experience through a superfast internet experience.
We’ve been using WiFi for a long time but it is not that common in households of small cities and villages, because somewhere the pricing of the wifi router can be high that not all people can afford, But using LiFi is more reliable because Every household nowadays has a LED light it is cheaper and can provide faster connections.
LiFi is more secure, in above article we mention everything you need to understand and decide.
Comment below which is best WiFi or LiFi? Why?