TEDGlobal>London
Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet
Harald Haas: Otkriće nove vrste bežićnog Interneta
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Što kad biste mogli koristiti postojeće tehnologije da pružite pristup Internetu više od 4 milijarde ljudi koji žive na mjestima gdje to infrastruktura ne podržava? Koristeći kupovne LED diode i solarne ćelije, Harald Haas i njegov tim su razvili novu tehnologiju koja prenosi podatke putem svjetla i možda će upravo ona premostiti digitalnu podjelu. Pogledajte kako bi mogla izgledati budućnost Interneta.
Harald Haas - Communications technology innovator
Harald Haas is the pioneer behind a new technology that can communicate as well as illuminate. Full bio
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.
00:12
I would like to demonstrate
for the first time in public
for the first time in public
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Želio bih prvi puta u javnosti
demonstrirati
demonstrirati
00:16
that it is possible to transmit a video
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da je moguće poslati video
00:20
from a standard off-the-shelf LED lamp
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sa standardne LED svjetiljke
00:24
to a solar cell with a laptop
acting as a receiver.
acting as a receiver.
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na solarnu ćeliju sa laptopom kao
prijamnikom.
prijamnikom.
00:30
There is no Wi-Fi involved,
it's just light.
it's just light.
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Wi-Fi nije uključen,
samo svjetlo.
samo svjetlo.
00:33
And you may wonder, what's the point?
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Možda se pitate,
koja je poanta?
koja je poanta?
00:35
And the point is this:
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Poanta je ovo:
00:38
There will be a massive
extension of the Internet
extension of the Internet
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Postojat će ogromni produžetak
Interneta
Interneta
00:41
to close the digital divide,
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da premosti digitalnu podjelu,
00:43
and also to allow for what we call
"The Internet of Things" --
"The Internet of Things" --
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i da dopusti ono što nazivamo
"Internet Stvari" --
"Internet Stvari" --
00:48
tens of billions of devices
connected to the Internet.
connected to the Internet.
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deseci milijardi uređaja spojeni
na Internet.
na Internet.
00:51
In my view, such an extension
of the Internet can only work
of the Internet can only work
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Po mom mišljenju, takav produžetak
Interneta može raditi jedino
Interneta može raditi jedino
00:55
if it's almost energy-neutral.
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ako je skoro energetski neutralan.
00:58
This means we need to use existing
infrastructure as much as possible.
infrastructure as much as possible.
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To znači da moramo koristiti postojeću
infrastrukturu što je više moguće.
infrastrukturu što je više moguće.
01:03
And this is where the solar cell
and the LED come in.
and the LED come in.
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Tu u priču ulaze solarne ćelije
i LED svjetla.
i LED svjetla.
01:08
I demonstrated for the first time,
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Demonstrirao sam prvi puta
01:11
at TED in 2011,
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na TED-u 2011. godine,
01:13
Li-Fi, or Light Fidelity.
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Li-Fi, ili Light Fidelity.
01:15
Li-Fi uses off-the-shelf LEDs
to transmit data incredibly fast,
to transmit data incredibly fast,
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Li-Fi koristi kupovne LED diode
za veoma brz prijenos podataka,
za veoma brz prijenos podataka,
01:21
and also in a safe and secure manner.
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na siguran način.
01:25
Data is transported by the light,
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Podatak se prenosi putem svjetla,
01:28
encoded in subtle changes
of the brightness.
of the brightness.
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enkodiran u suptilnim promjenama
svjetline.
svjetline.
01:32
If we look around,
we have many LEDs around us,
we have many LEDs around us,
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Ako pogledate oko sebe, vidjet ćete
mnoštvo LED svjetiljki u okolini,
mnoštvo LED svjetiljki u okolini,
01:35
so there's a rich infrastructure
of Li-Fi transmitters around us.
of Li-Fi transmitters around us.
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prema tome postoji bogata
infrastruktura LI-Fi odašiljača oko nas.
infrastruktura LI-Fi odašiljača oko nas.
01:41
But so far, we have been using
special devices -- small photo detectors,
special devices -- small photo detectors,
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No, dosad, smo koristili posebne
uređaje -- male fotodetektore,
uređaje -- male fotodetektore,
01:46
to receive the information
encoded in the data.
encoded in the data.
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za primanje informacija
enkodiranih u podatke.
enkodiranih u podatke.
01:50
I wanted to find a way to also use
existing infrastructure
existing infrastructure
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Želio sam pronaći način da
se iskoristiti postojeća infrastruktura
se iskoristiti postojeća infrastruktura
01:54
to receive data from our Li-Fi lights.
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za primanje podataka putem
Li-Fi svjetla.
Li-Fi svjetla.
01:58
And this is why I have been looking into
solar cells and solar panels.
solar cells and solar panels.
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I zato sam se počeo baviti solarnim
ćelijama i solarnim panelima.
ćelijama i solarnim panelima.
02:03
A solar cell absorbs light
and converts it into electrical energy.
and converts it into electrical energy.
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Solarna ćelija upija i pretvara
svjetlost u električnu energiju.
svjetlost u električnu energiju.
02:08
This is why we can use a solar cell
to charge our mobile phone.
to charge our mobile phone.
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Zato možemo koristiti solarne ćelije
za punjenje mobitela.
za punjenje mobitela.
02:13
But now we need to remember
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Prisjetimo se da
02:14
that the data is encoded in subtle changes
of the brightness of the LED,
of the brightness of the LED,
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su podaci enkodirani u suptilnim
promjenama svjetline LED diode,
promjenama svjetline LED diode,
02:21
so if the incoming light fluctuates,
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te ako je dolazno svjetlo promjenjivo,
02:24
so does the energy harvested
from the solar cell.
from the solar cell.
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onda je promjenjiva i energija
prikupljena u solarnoj ćeliji.
prikupljena u solarnoj ćeliji.
02:28
This means we have
a principal mechanism in place
a principal mechanism in place
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To znači da imamo prinicipijelni
mehanizam
mehanizam
02:32
to receive information from the light
and by the solar cell,
and by the solar cell,
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za primanje informacije iz svjetla
pomoću solarne ćelije,
pomoću solarne ćelije,
02:38
because the fluctuations
of the energy harvested
of the energy harvested
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jer fluktuacije prikupljene energije
02:41
correspond to the data transmitted.
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odgovaraju prenesenim podacima.
02:43
Of course the question is:
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Naravno, pitanje je:
02:46
can we receive very fast and subtle
changes of the brightness,
changes of the brightness,
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možemo li primati veoma brze i suptilne
promjene svjetline,
promjene svjetline,
02:50
such as the ones transmitted
by our LED lights?
by our LED lights?
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poput one koje naše LED svjetlo
odašilje?
odašilje?
02:54
And the answer to that is yes, we can.
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A odgovor na to pitanje je, da, možemo.
02:58
We have shown in the lab
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Ispitivanje u laboratoriju
03:00
that we can receive up to 50
megabytes per second
megabytes per second
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je pokazalo da je moguće
primati do 50 MB po sekundi
primati do 50 MB po sekundi
03:03
from a standard, off-the-shelf solar cell.
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pomoću standardne, kupovne solarne ćelije.
03:06
And this is faster than most
broadband connections these days.
broadband connections these days.
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Ovo je mnogo veća brzina od
većine širokopojasnih veza.
većine širokopojasnih veza.
03:11
Now let me show you in practice.
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Dopustite da vam demonstriram.
03:17
In this box is a standard,
off-the-shelf LED lamp.
off-the-shelf LED lamp.
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U ovoj kutiji se nalazi standardna,
kupovna LED svjetiljka.
kupovna LED svjetiljka.
03:23
This is a standard,
off-the-shelf solar cell;
off-the-shelf solar cell;
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Ovo je standardna,
kupovna solarna ćelija;
kupovna solarna ćelija;
03:25
it is connected to the laptop.
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spojena je na laptop.
03:28
And also we have an instrument here
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Također, ovdje imamo instrument
03:31
to visualize the energy
we harvest from the solar cell.
we harvest from the solar cell.
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koji vizualizira energiju prikupljenu
pomoću solarne ćelije.
pomoću solarne ćelije.
03:35
And this instrument shows
something at the moment.
something at the moment.
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Ovaj instrument trenutno
pokazuje nešto.
pokazuje nešto.
03:37
This is because the solar cell already
harvests light from the ambient light.
harvests light from the ambient light.
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Zato što solarna ćelija već prikuplja
svjetlo iz okoline.
svjetlo iz okoline.
03:43
Now what I would like to do first
is switch on the light,
is switch on the light,
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Prvo bih htio uključiti svjetlo,
03:45
and I'll simply, only switch on the light,
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tako da ću prvo samo uključiti svjetlo,
03:48
for a moment,
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na trenutak,
03:50
and what you'll notice is that
the instrument jumps to the right.
the instrument jumps to the right.
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i primjetit ćete da instrument
skače udesno.
skače udesno.
03:54
So the solar cell, for a moment,
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Solarna ćelija, trenutno,
03:56
is harvesting energy
from this artificial light source.
from this artificial light source.
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prikuplja energiju iz
ovog umjetnog izvora svjetlosti.
ovog umjetnog izvora svjetlosti.
04:00
If I turn it off, we see it drops.
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Ako ga isključim, vidimo da opada.
04:03
I turn it on ...
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Uključim ga...
04:05
So we harvest energy with the solar cell.
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Prema tome, prikupljamo energiju pomoću
solarne ćelije.
solarne ćelije.
04:08
But next I would like to activate
the streaming of the video.
the streaming of the video.
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Sljedeće bih želio pokrenuti prijenos
videa.
videa.
04:15
And I've done this
by pressing this button.
by pressing this button.
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To ću napraviti pritiskanjem
ove tipke.
ove tipke.
04:17
So now this LED lamp here
is streaming a video
is streaming a video
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Ova LED svjetiljka sada prenosi
video
video
04:22
by changing the brightness of the LED
in a very subtle way,
in a very subtle way,
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promjenom svjetline LED diode na
veoma suptilan način,
veoma suptilan način,
04:26
and in a way that you can't
recognize with your eye,
recognize with your eye,
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na način na koji ne možete
primjetiti golim okom,
primjetiti golim okom,
04:29
because the changes
are too fast to recognize.
are too fast to recognize.
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jer su promjene prebrze
da bi ih primjetili.
da bi ih primjetili.
04:33
But in order to prove the point,
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Da bih vam dokazao,
04:35
I can block the light of the solar cell.
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mogu blokirati svjetlo solarne ćelije.
04:40
So first you notice
the energy harvesting drops
the energy harvesting drops
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Prvo primjećujete pad prikupljene
energije
energije
04:43
and the video stops as well.
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i video staje, također.
04:45
If I remove the blockage,
the video will restart.
the video will restart.
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Kad uklonim prepreku, video
počinje ponovno.
počinje ponovno.
04:49
(Applause)
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(Pljesak)
04:55
And I can repeat that.
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I može se ponoviti.
04:57
So we stop the transmission of the video
and energy harvesting stops as well.
and energy harvesting stops as well.
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Prekinemo prijenos videa i
prikupljanje energije prestaje, također.
prikupljanje energije prestaje, također.
05:03
So that is to show that the solar cell
acts as a receiver.
acts as a receiver.
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To pokazuje da se solarna ćelija
ponaša kao prijamnik.
ponaša kao prijamnik.
05:08
But now imagine that this LED lamp
is a street light, and there's fog.
is a street light, and there's fog.
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Zamislite da je LED svjetiljka
ulično svjetlo, i magla je.
ulično svjetlo, i magla je.
05:14
And so I want to simulate fog,
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Želim simulirati maglu,
05:16
and that's why I brought
a handkerchief with me.
a handkerchief with me.
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zato sam ponio maramicu sa sobom.
05:19
(Laughter)
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(Smijeh)
05:20
And let me put the handkerchief
over the solar cell.
over the solar cell.
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Stavimo maramicu preko solarne ćelije.
05:25
First you notice
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Prvo primjetite
05:27
the energy harvested drops, as expected,
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da prikupljanje energije opada,
kao što je i očekivano,
kao što je i očekivano,
05:31
but now the video still continues.
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ali video ipak nastavlja.
05:34
This means, despite the blockage,
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Ovo znači, usprkos blokadi,
05:37
there's sufficient light coming through
the handkerchief to the solar cell,
the handkerchief to the solar cell,
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dovoljna količina svjetlosti dopire
kroz maramicu do solarne ćelije,
kroz maramicu do solarne ćelije,
05:41
so that the solar cell is able to decode
and stream that information,
and stream that information,
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da bi solarna ćelija dekodirala i
prenijela tu informaciju,
prenijela tu informaciju,
05:46
in this case, a high-definition video.
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u ovom slučaju, video visoke razlučivosti.
05:51
What's really important here is that
a solar cell has become a receiver
a solar cell has become a receiver
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Ono što je zaista bitno ovdje je
da solarna ćelija postaje prijamnik
da solarna ćelija postaje prijamnik
05:56
for high-speed wireless signals
encoded in light,
encoded in light,
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za bežične signale visoke brzine
enkodirane u svjetlu,
enkodirane u svjetlu,
06:00
while it maintains its primary function
as an energy-harvesting device.
as an energy-harvesting device.
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dok zadržava svoju prvotnu funkciju
uređaja za prikupljanje energije.
uređaja za prikupljanje energije.
06:05
That's why it is possible
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Zato je moguće
06:08
to use existing solar cells
on the roof of a hut
on the roof of a hut
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koristiti postojeće solarne ćelije
na krovu nastambe
na krovu nastambe
06:12
to act as a broadband receiver
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kao širokopojasne prijemnike
06:14
from a laser station on a close by hill,
or indeed, lamp post.
or indeed, lamp post.
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od laserske stanice na obližnjem brdu,
ili stub za uličnu rasvjetu.
ili stub za uličnu rasvjetu.
06:19
And It really doesn't matter
where the beam hits the solar cell.
where the beam hits the solar cell.
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Zaista nije bitno gdje zraka
pogodi solarnu ćeliju.
pogodi solarnu ćeliju.
06:23
And the same is true
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Isto vrijedi i za
06:24
for translucent solar cells
integrated into windows,
integrated into windows,
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prozirne solarne ćelije
integrirane u prozorima,
integrirane u prozorima,
06:28
solar cells integrated
into street furniture,
into street furniture,
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solarne ćelije integrirane
u ulične elemente,
u ulične elemente,
06:32
or indeed, solar cells integrated
into these billions of devices
into these billions of devices
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ili solarne ćelije intregrirane u ove
milijarde uređaja
milijarde uređaja
06:36
that will form the Internet of Things.
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koji će tvoriti Internet Stvari.
06:38
Because simply,
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Jer, jednostavno,
06:40
we don't want to charge
these devices regularly,
these devices regularly,
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ne želimo puniti ove uređaje
redovno,
redovno,
06:42
or worse, replace the batteries
every few months.
every few months.
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ili još gore, mijenjati baterije
svakih par mjeseci.
svakih par mjeseci.
06:46
As I said to you,
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Kao što sam rekao,
06:48
this is the first time
I've shown this in public.
I've shown this in public.
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ovo je prvi puta da je
ovo prikazano u javnosti.
ovo prikazano u javnosti.
06:50
It's very much a lab demonstration,
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Ovo je laboratorijska demonstracija,
06:52
a prototype.
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prototip.
06:54
But my team and I are confident
that we can take this to market
that we can take this to market
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No, moj tim i ja smo uvjereni
da možemo izaći na tržište sa ovim
da možemo izaći na tržište sa ovim
06:57
within the next two to three years.
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u sljedeće dvije do tri godine.
07:00
And we hope we will be able to contribute
to closing the digital divide,
to closing the digital divide,
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Nadamo se ćemo moći doprinijeti
premoštavanju digitalne podjele,
premoštavanju digitalne podjele,
07:05
and also contribute
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i također, doprinijeti
07:06
to connecting all these billions
of devices to the Internet.
of devices to the Internet.
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spajanju svih ovih milijardi uređaja
na Internet.
na Internet.
07:10
And all of this without causing
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I sve to bez uzrokovanja
07:11
a massive explosion
of energy consumption --
of energy consumption --
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masivne eksplozije
potrošnje energije --
potrošnje energije --
07:14
because of the solar cells,
quite the opposite.
quite the opposite.
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zbog solarnih ćelija,
upravo suprotno.
upravo suprotno.
07:16
Thank you.
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Hvala vam.
07:17
(Applause)
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(Pljesak)
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