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kakarotto
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PSN ID: kakarotto_DS
Thumbs up Nova velocidade de fibra optica???

28-03-13, 12:39 #1
Quote:
Monash University researchers have found a way to increase data capacity of fibre optic networks. The finding could greatly accelerate the speed of the NBN, Monash said.

The technique, presented last week at the Optical Fiber Communications conference in California, uses commercial components manufactured in Australia to increase the efficiency of existing fibre networks.

After implementation, fibre transmitted at 10Tbps over more than 850km in length. By comparison, ADSL2+ speeds average 6Mbps.

The researchers increased capacity by reprogramming a network component, the wavelength selective switch, to work with data encoding technology that makes more efficient use of available data channels.

Arthur Lowery, one of the researchers and a professor at Monash, said the technique allows new traffic to “squeezed into the fibre at any location and added to any ‘lane’ of the fibre freeway even between existing lanes”.

Previously, data was transmitted with gaps between channels.

“Our approach is so flexible, network operators could adjust capacity to respond to increased demand. For example, from people following big sport events like the Olympics," Lowery said.

The additional capacity means more can be done with existing infrastructure.

"Rather than laying hundreds of new parallel optical fibres to boost network capacity, we can make more efficient use of the existing network by tweaking the way data is transmitted over long distances," Lowery said.

Liang Du, another Monash researcher, said the advance should be easy to implement.

"Because we are have made use of equipment that is already on the market, this technology could be translated to the consumer quite quickly," he said.
http://www.techworld.com.au/article/...s_researchers/

E ai, alguem lembra da epoca dos discadores de modem?





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leiden
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Steam ID: olhonolance
28-03-13, 12:49 #2
q tola essa comparacao com adsl2 ehhe

"As of 2011 the record for bandwidth on a single core was 101 Tbit/sec (370 channels at 273 Gbit/sec each).[27] The record for a multi-core fibre as of January 2013 was 1.05 petabits per second"

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punisher
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28-03-13, 13:09 #3
leiden, 10Tbps em um único cabo, por isso a comparação com ADSL2+

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predator
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Gamertag: decapentaplegic PSN ID: decapentaplegic Steam ID: decapentaplegic
28-03-13, 14:52 #4
um cabo tem várias fibras, cada fibra tem vários canais

a tecnologia atual, pelo menos pros cabos submarinos, é de 4 fibras, 16 canais e 100Gbps por canal. tem algumas ineficiencias, mas passa de 4Tbps fácil. tecnologias de 500Gbps/canal já estão no pipeline

se isso aí for 10Tbps POR FIBRA, daí é bem alto... pq pelo que eu entendi da noticia, o esquema deles é ter um número praticamente ilimitado de canais na fibra

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vegetous
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XFIRE ID: carniceiru
28-03-13, 15:30 #5
velocidade != largura de banda

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predator
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Gamertag: decapentaplegic PSN ID: decapentaplegic Steam ID: decapentaplegic
28-03-13, 16:03 #6
explica ae

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Demé
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28-03-13, 16:13 #7
 

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Marcelo
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Steam ID: cabelo
28-03-13, 16:40 #8
basicamente bit/seg não é medida de velocidade, é medida de fluxo

por isso que "velocidade != largura de banda"

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vegetous
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XFIRE ID: carniceiru
28-03-13, 17:01 #9
Quote:
Postado por predator Mostrar Post
explica ae
você vai continuar lagado!

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diferent
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28-03-13, 19:27 #10
Mas seu download vai ser uma maravilha!

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Holocaust
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Steam ID: holozinho
28-03-13, 19:30 #11
boa
explicação coletiva

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Aveia-Quaker
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28-03-13, 19:45 #12
DWDM ftw.

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ShadoW
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28-03-13, 20:45 #13
AEHUHAEU explicação melhor impossivel

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punisher
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28-03-13, 23:38 #14
Quote:
Postado por predator Mostrar Post
um cabo tem várias fibras, cada fibra tem vários canais

a tecnologia atual, pelo menos pros cabos submarinos, é de 4 fibras, 16 canais e 100Gbps por canal. tem algumas ineficiencias, mas passa de 4Tbps fácil. tecnologias de 500Gbps/canal já estão no pipeline

se isso aí for 10Tbps POR FIBRA, daí é bem alto... pq pelo que eu entendi da noticia, o esquema deles é ter um número praticamente ilimitado de canais na fibra
preda, eu quis dizer por fibra mesmo. Foi o que entendi lendo o artigo pelo menos, eles criaram canais "virtuais" dentro da fibra fazendo multiplexação. Agora que percebi que o artigo que eu li era bem melhor que o desse topico:
Quote:
The researchers overcame these issues by fundamentally improving the hollow core design, using an ultra-thin photonic-bandgap rim. This new design enables low loss (3.5 dB/km), wide bandwidth (160nm), and latency that blows the doors off normal optic fiber — light, and thus the data, really is travelling 31% faster down this new hollow fiber. To achieve the transmission rate of 73.7 terabits per second, the researchers used wave division multiplexing (WDM), combined with mode division multiplexing, to transmit three modes of 96 channels of 256Gbps. Mode division multiplexing is a new technology that seems to involve spatial filtering — rotating the signals with a polarizer, so that more of fiber can be used. As far as we’re aware, this is one of the fastest ever transmission rates in the lab. (See: Infinite-capacity wireless vortex beams carry 2.5 terabits per second.)
http://www.extremetech.com/computing...q1NWe5M.reddit

Ah sim, quem quiser ler o artigo científico: http://www.nature.com/nphoton/journa...n.2013.45.html
Só pagar $32 dóla (ou ter assinatura já... *cough* preda)

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predator
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Gamertag: decapentaplegic PSN ID: decapentaplegic Steam ID: decapentaplegic
29-03-13, 08:50 #15
ja faz bastante tempo que eu tinha assinatura da nature...

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punisher
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29-03-13, 12:23 #16
Sei la ne bro, vai que ainda tinha hehe

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baladao
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Gamertag: JBaladao PSN ID: jbaladao Steam ID: baladao
12-03-14, 19:50 #17
Queria banda larga c/ fibra da Vivo no meu CEP ;(

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vegetous
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XFIRE ID: carniceiru
12-03-14, 19:55 #18
Quote:
Postado por vegetous Mostrar Post
velocidade != largura de banda

HUAHUAHUAHUAHHA

Kralho eu entrei pra postar isso!

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