Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
ハラルド・ハース: 無線インターネット通信の画期的な新手法
Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate. Full bio
Double-click the English transcript below to play the video.
for the first time in public
acting as a receiver.
ご紹介したいと思います
it's just light.
光だけによる通信です
と思われるかもしれません
extension of the Internet
"The Internet of Things" --
つまり
connected to the Internet.
インタネット接続を広めようというものです
of the Internet can only work
このようなインターネットの拡大は
成り立ちません
infrastructure as much as possible.
最大限に活用することです
and the LED come in.
活用の場が見出されます
to transmit data incredibly fast,
驚異的な速度のデータ通信を
コード化することによって
of the brightness.
we have many LEDs around us,
多くのLEDがありますが
of Li-Fi transmitters around us.
インフラが豊富にあることを意味します
special devices -- small photo detectors,
受信するのに
encoded in the data.
使ってきました
existing infrastructure
私は考えました
solar cells and solar panels.
注目したわけです
and converts it into electrical energy.
電気エネルギーへと変換します
to charge our mobile phone.
携帯電話の充電ができます
of the brightness of the LED,
from the solar cell.
微妙に変化します
a principal mechanism in place
光に組み込まれたデータを受信する
and by the solar cell,
あるということです
of the energy harvested
送信されたデータに
changes of the brightness,
極めて速く かつ微妙な光の変動を
by our LED lights?
megabytes per second
broadband connections these days.
ブロードバンド通信よりも速い速度です
off-the-shelf LED lamp.
LEDランプが入っています
off-the-shelf solar cell;
太陽電池で
we harvest from the solar cell.
something at the moment.
あることを示しています
harvests light from the ambient light.
エネルギーを生み出しているからです
is switch on the light,
ランプのスイッチを入れてみましょう
the instrument jumps to the right.
ご覧になれますね
from this artificial light source.
エネルギーを生成しています
生成することができました
the streaming of the video.
by pressing this button.
is streaming a video
ほんの僅かに変化させることで
in a very subtle way,
recognize with your eye,
are too fast to recognize.
太陽電池の光をさえぎってみましょう
the energy harvesting drops
すぐに分ります
the video will restart.
動画の再生も再開します
and energy harvesting stops as well.
止まります
acts as a receiver.
動作していることを示します
is a street light, and there's fog.
霧がかっている場面を想像しましょう
a handkerchief with me.
over the solar cell.
思ったとおりです
再生しています
the handkerchief to the solar cell,
太陽電池に届き
and stream that information,
動画を―
a solar cell has become a receiver
encoded in light,
基本的な機能を果たしながら
as an energy-harvesting device.
高速無線通信の受信器となっていることです
on the roof of a hut
太陽電池を
or indeed, lamp post.
ブロードバンド受信機として使うことができます
where the beam hits the solar cell.
integrated into windows,
into street furniture,
太陽電池でもよく
into these billions of devices
このような装置に取り付けられた
these devices regularly,
定期的に充電するのは面倒ですし
every few months.
もっと面倒です
I've shown this in public.
今回が初めてです
that we can take this to market
to closing the digital divide,
何十億もの装置の
of devices to the Internet.
願っています
of energy consumption --
quite the opposite.
ABOUT THE SPEAKER
Harald Haas - Communications technology innovatorHarald Haas is the pioneer behind a new technology that can communicate as well as illuminate.
Why you should listen
Imagine using your car headlights to transmit data ... or surfing the web safely on a plane, tethered only by a line of sight. Harald Haas is working on it. He currently holds the Chair of Mobile Communications at the University of Edinburgh, and is co-founder and Chief Scientific Officer of pureLiFi Ltd as well as the Director of the LiFi Research and Development Center at the University of Edinburgh. His main research interests are in optical wireless communications, hybrid optical wireless and RF communications, spatial modulation, and interference coordination in wireless networks.
Haas has long been studying ways to communicate electronic data signals, designing modulation techniques that pack more data onto existing networks. But his latest work leaps beyond wires and radio waves to transmit data via an LED bulb that glows and darkens faster than the human eye can see. His group published the first proof-of-concept results demonstrating that it is possible to to turn commercially available light emitting diode (LED) light bulbs into broadband wireless transmission systems.
"It should be so cheap that it's everywhere," he says. "Using the visible light spectrum, which comes for free, you can piggy-back existing wireless services on the back of lighting equipment."
Harald Haas | Speaker | TED.com