Wireless data from every light bulb by Harald Haas

What if every light bulb in the world could also transmit data? At TEDGlobal, Harald Haas demonstrates, for the first time, a device that could do exactly that. By flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower — and do it in a way that’s more efficient, secure and widespread.

Who is Harold Haas?

Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate

Read more about him Click here

Watch his Video below which is on Ted Talk . Article Excerpt from Ted Talk

Li-Fi The Internet Using LED Light Waves

Wi-Fi networks dependent on radio waves are growing more congested all the time—and can’t be used everywhere—so various researchers and companies are betting light waves from LED lamps and overheads can also stream data and connect people to the internet. So-called Li-Fi technology, which uses a much more abundant slice of the wireless spectrum, is also more energy-efficient than Wi-Fi, though for now people need a special USB drive to use it. Light waves can’t pass through walls like radio waves do, but that also makes the networks more secure. A group from the world’s largest technical association, IEEE, will have draft standards for Li-Fi ready by yearend for companies that want to commercialize the technology, says its chair man, Bob Heile.

1. Setup LEDs outfitted with Li-Fi technology can embed and stream data in the light they emit by modulating the light’s intensity faster than the human eye can detect.

 

 

2. Use A USB drive that serves as a receiver and transmitter picks up the signals from the LEDs and uploads data to them from a connected PC or mobile device.

3. Privacy Because light, unlike radio waves, can’t penetrate a wall, Li-Fi isn’t as all-purpose as Wi-Fi. But it’s more secure.

PureLiFi

Innovators Harald Haas and Mostafa Afgani: co-founders (chief scientific officer; chief technology officer)

Founded 2012 Based Edinburgh

Funding £9 million ($11.4 million)

Background Haas, a professor at the University of Edinburgh, became a public face of Li-Fi research with a 2011 demo in a TED Talk. The lecture has been viewed online about 2.4 million times.

Status The 25-employee startup is testing its technology with customers including Cisco Systems and British Telecommunications. Afgani says it transmits data at up to 43 megabits per second. (The average U.S. broadband speed is about 16 Mbps, cloud-services company Akamai Technologies estimates.) PureLiFi has also partnered with French lightmaker Lucibel, which introduced its Li-Fi-equipped overhead lights in the fall and plans to unveil the next model by April.

VLNComm

Innovators Mohammad Noshad and Maite Brandt-Pearce: co-founders (chief technology officer; adviser)

Founded 2013 Based Charlottesville, Va.

Funding $1.6 million

Background University of Virginia professor Brandt-Pearce and former student Noshad, who recently completed a postdoc at Harvard, spun VLNComm out of their optical communications research.

Status Co-founder Fraidoon Hovaizi says their nine-person team, backed by the U.S. Department of Energy and the National Science Foundation, has been in funding and partnership talks with U.S. government agencies and companies including Lockheed Martin. Their latest overhead-light prototype is as fast as 25 Mbps; Brandt-Pearce says the next one will hit 100 Mbps given their advances in coding, modulation, and signal processing. VLNComm plans to bring a Li-Fi-capable desk lamp to market this year.

Velmenni

Innovators Deepak Solanki and Saurabh Garg: co-founders (chief executive officer; chief technology officer)

Founded 2012 Based Tartu, Estonia

Funding Declined to disclose

Background Hardware developer Solanki and software developer Garg started working on Velmenni in India. The 11-person team has created a credit-card-size prototype router capable of converting off-the-shelf LED lights into Li-Fi transmitters.

Status Solanki says the technology can reach 10 Mbps today and will reach 100 Mbps by yearend. Velmenni, which completed an Airbus business-accelerator program in Hamburg in 2015, says it’s developing Li-Fi applications for airplane cabins and cockpits with clients it declined to name, as well as hardware for outdoor use.

Excerpt from Bloomberg

What is the LiFI internet architecture

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

 

Li-Fi-internet

What is the Difference between LiFi and WiFi internet

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

Feature LiFi WiFi
Full form Light Fidelity Wireless Fidelity
Operation LiFi transmits data using light with the help of LED bulbs. WiFi transmits data using radio waves with the help of WiFi router.
Interference Do not have any intereference issues similar to radio frequency waves. Will have intereference issues from nearby access points(routers)
Technology Present IrDA compliant devices WLAN 802.11a/b/g/n/ac/ad standard compliant devices
Applications 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
Merits(advantages) 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
Privacy 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
Data density Works in high dense environment Works in less dense environment due to interference related issues
Coverage distance About 10 meters About 32 meters (WLAN 802.11b/11g), vary based on transmit power and antenna type
System components 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

 

 

What is Li-Fi Internet

Light Fidelity (Li-Fi ) is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. The term was coined by Harald Haas  and is a form of visible light communication and a subset of optical wireless communications (OWC) and could be a complement to RF communication (Wi-Fi or Cellular network), or even a replacement in contexts of data broadcasting. It is so far measured to be about 100 times faster than some Wi-Fi implementations, reaching speeds of 224 gigabits per second.

It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves) spectrum, part of optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations.

Source – Wikipedia