Li-fi '100 times faster than wi-fi' at shine of a light presented at Mobile World Congress

Internet 100 times faster than wi-fi may soon be available with revolutionary wireless technology — from a lamp.

Key points:

  • LED bulbs fitted with microchip become hotspot with theoretical speeds over 200 gbps
  • Apple may make iPhone 7 li-fi-compatible
  • Device must be directly in light, cannot connect through walls but could be ideal in schools and hospitals

Li-fi has been demonstrated by French start-up Oledcomm at the world's biggest mobile fair, Mobile World Congress, in Barcelona.

As soon as a smartphone was placed under an office lamp, it started playing a video.

The technology uses the frequencies generated by LED bulbs — which flicker on and off imperceptibly thousands of times a second — to beam information through the air, leading it to be dubbed the "digital equivalent of Morse Code".

The bulbs are outfitted with a microchip, turning them into a hotspot.

The big advantage of li-fi, short for "light fidelity", is its lightning speed.

Laboratory tests have shown theoretical speeds of over 200 gbps — fast enough to "download the equivalent of 23 DVDs in one second", founder and head of Oledcomm Suat Topsu said.

"Li-fi allows speeds that are 100 times faster than wi-fi" which uses radio waves to transmit data, he said.

It started making its way out of laboratories in 2015 to be tested in everyday settings in France, a li-fi pioneer, in places such as a museums and shopping malls.

It has also been tested in Belgium, Estonia and India.

Apple eyeing Li-Fi for next iPhone

Dutch medical equipment and lighting group Philips is reportedly interested in the technology and Apple may integrate it in its next smartphone, the iPhone7, due out at the end of the year, according to tech media.

With analysts predicting the number of objects that are connected to the internet soaring to 50 million by 2020 and the spectrum for radio waves used by wi-fi in short supply, li-fi offers a viable alternative, according to its promoters.

"We are going to connect our coffee machine, our washing machine, our tooth brush," Mr Topsu said.

"But you can't have more than ten objects connected in Bluetooth or wi-fi without interference."

Deepak Solanki, the founder and chief executive of Estonian firm Velmenni which tested li-fi in an industrial space last year, said he expected "two years down the line the technology can be commercialised and people can see its use at different levels".

LiFi 'still laboratory technology'

Analysts said it was still hard to say if li-fi would become the new wi-fi.

"It is still a laboratory technology," said Frederic Sarrat, an analyst at consultancy firm PwC.

Gartner chief analyst Jim Tully said much would depend on how wi-fi evolved in the coming years.

"Wi-fi has shown a capability to continuously increase its communication speed with each successive generation of the technology," he said.

Li-fi has its drawbacks — it only works if a smartphone or other device is placed directly in the light and it cannot travel through walls.

This restricts its use to smaller spaces, but Mr Tully said this could be a positive in some instances, limiting the risk of data theft.

"Unlike wi-fi, li-fi can potentially be directed and beamed at a particular user in order to enhance the privacy of transmissions," he said.

Backers of li-fi say it would also be ideal in places where wi-fi is restricted to some areas such as schools and hospitals.

"Li-fi has a place in hospitals because it does not create interference with medical materials," head of French lighting manufacturer Coolight Joel Denimal said.

In supermarkets it could be used to give information about a product, or in museums about a painting, by using lamps placed nearby.

It could also be useful on aircraft, in underground garages and any place where lack of internet connection is an issue.

But li-fi also requires devices be equipped with additional technology such as a card reader, or dongle, to function. This gives it a "cost disadvantage", Mr Tully said.

Source: AFP

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