Imagine if the LED bulbs in your house could transmit high-speed data without WiFi or broadband. Or an LED-lit movie billboard that can relay high-quality promotional videos and songs to your smartphone as you pass by in a crowded mall? Well, these scenarios are not out of any sci-fi thriller — the government of India is already testing technology that can enable this and other features.
In a recent pilot project, the ministry of electronics and IT successfully tested a technology called LiFi (Light Fidelity), which uses LED bulbs and light spectrum to transmit data at speeds as high as 10 GB per second over a 1-km radius.
The pilot project was conducted in association with Indian Institute of Technology Madras at its campus along with lighting company Philips a few months ago. While the pilot was staged in a closed environment, ERNET now plans to test it in open spaces in partnership with Indian Institute of Science, Bengaluru.
What is LiFi
“Smart paint” containing fluorescent and phosphorescent pigments could extend the possibilities of proposed LiFi networks, report a team led by K S Narayan at the Jawaharlal Nehru Centre for Advanced Scientific Research in Bengaluru, India. The researchers analysed the effect of nearby luminescent surfaces on the noise characteristics of visible light communication system (VLC) signals, and found that secondary emission could limit bandwidth locally by overwhelming receivers. The residual glow from phosphors could even be modulated to transmit a signal after the primary LED source has been turned off.
LiFi uses visible and near-visible light to connect electronic devices in much the same way as now nearly ubiquitous WiFi. Like its more familiar counterpart, LiFi technology is expected to play a role in connecting devices within the incipient internet of things. Unlike microwaves, however, visible-light signals cannot pass through walls, meaning that LiFi networks are, in principle, less vulnerable to eavesdropping from outside.
Know more visit http://physicsworld.com/
Wireless Fidelity (Wi-Fi) and Light Fidelity Li-Fi technologies are more demanding in recent time. There are huge business opportunities available to help new players enter the market and to collaborate with big companies to provide various products and services. Particularly for Li-Fi technology, the new start-up market is coming up with advanced products, services and solutions in the market and is expected to double in the next 5 to 7 years. In this space, cooperation and mergers and acquisition laws are expected to continue.
To understand the networking environment, the report Wi-Fi and Li-Fi markets is underlined. The report speaks about the mode, products, services, components, circles and regions deployed for both Li-Fi and Wi-Fi. In the direction of adoption of main stakeholders in the next 5-7 years, information about major trends, drivers, investments, vertical player initiatives and government initiatives can be found. Furthermore, this report gives details of the major challenges that will affect market growth.
As per research report, the Wi-Fi and Li-Fi markets are estimated to witness a CAGR of 15.0% and 61.3%, respectively during the forecast period 2016–2022.
Read more: http://www.digitaljournal.com/pr/3573190#ixzz4zN1KOMhh
This press release was orginally distributed by SBWire
Lighting systems manufacturer Lucibel announced that it has completed its first deployment of ‘LiFi by Lucibel’ in a hospital environment, installing the service in the cardiology department of the Stell clinic in the town of Rueil-Malmaison (Ile de France region). The company said that Li-Fi Internet connectivity is particularly suited to areas within hospitals where the use of Wi-Fi is not recommended or forbidden, due to the risk of interference with medical equipment. The service also offers the additional benefit of providing hospital staff with a secure connection to access patient data.
Source – Telecom Paper
LiFi is not the replacement of WiFi technology. It can be considered as incredible companion of the WiFi technology. It operates between 380 nm to 780 nm optical range. LiFi is used to exchange data incredibly rapidly and securely at much lower power level compare to WiFi.
Below is the internet architecture diagram flow
What is the Difference between LiFi vs WiFi, here are some basic and common differences between the two technologies
Below table shows your a comparision
||LiFi transmits data using light with the help of LED bulbs.
||WiFi transmits data using radio waves with the help of WiFi router.
||Do not have any intereference issues similar to radio frequency waves.
||Will have intereference issues from nearby access points(routers)
||Present IrDA compliant devices
||WLAN 802.11a/b/g/n/ac/ad standard compliant devices
||Used in airlines, undersea explorations, operation theaters in the hospitals, office and home premises for data transfer and internet browsing
||Used for internet browsing with the help of wifi kiosks or wifi hotspots
||Interference is less, can pass through salty sea water, works in densy region
||Interference is more, can not pass through sea water, works in less densy region
||In LiFi, light is blocked by the walls and hence will provide more secure data transfer
||In WiFi, RF signal can not be blocked by the walls and hence need to employ techniques to achieve secure data transfer.
|Data transfer speed
||About 1 Gbps
||WLAN-11n offers 150Mbps, About 1-2 Gbps can be achieved using WiGig/Giga-IR
|Frequency of operation
||10 thousand times frequency spectrum of the radio
||2.4GHz, 4.9GHz and 5GHz
||Works in high dense environment
||Works in less dense environment due to interference related issues
||About 10 meters
||About 32 meters (WLAN 802.11b/11g), vary based on transmit power and antenna type
||Lamp driver, LED bulb(lamp) and photo detector will make up complete LiFi system.
||requires routers to be installed, subscriber devices(laptops,PDAs,desktops) are referred as stations