Researchers challenge "limitless" fibre capacity

 

Capacity running out?

Fibre networks’ data capacity is running out faster than expected, a report from the University of Southampton has claimed.

If left unattended, the situation could result in a “capacity crunch” which might seriously constrain the future growth of the internet, the report suggested.

There could also be social and political consequences as well if “radical innovation” in the physical network infrastructure is not brought about.

“A growing realisation has emerged within the telecommunications industry that the end of the phenomenal growth in optical fibre communication capacity is within sight,” said David Richardson, from the university’s Optoelectronics Research Centre, in a paper published in thr journal Science.

Specifically, he called for “improvements in the key physical properties of transmission fibres and the optical amplifiers that we rely on to transmit data over long distances.”

“The thought that the current fibre technology has infinite capacity is not true - we are beginning to hit the fundamental limits of the current technology,” Richardson told the BBC.

"We need to be looking at the next big breakthrough to allow us to continue to scale as we have traditionally done."

Richardson suggested to fix the problem, scientists would have to go “back to the fundamentals of the optics, the actual light pipes.”

Meanwhile, BT is pressing ahead with its fibre efforts and earlier this month announced a nationwide survey to garner how the level of fibre broadband support differs between parts of the UK.

The findings will guide which parts of the UK will be the next to receive fibre services.

And Australia is also pressing ahead with its own fibre build.

This article originally appeared at itpro.co.uk

Copyright © ITPro, Dennis Publishing


Researchers challenge "limitless" fibre capacity
""“The thought that the current fibre technology has infinite capacity is not true - we are beginning to hit the fundamental limits of the current technology,” Richardson told the BBC." Who, ..."
By realitybites
 
 
 
Comments: 14
hellfire
Oct 19, 2010 9:00 AM
The ABN fibre rollout here in Australia somehow has our politicians and many of the public believe that all users will get broadband speed of 100mb/second. Obviously they have never heard of latency or that this speed is that of the network and not the speed with which the user is able to connect from his home.
EMwyres
Oct 19, 2010 9:24 AM
@hellfire - if you've got a transmission medium that has lower latency than fibre optics, I suggest you take out an exclusive world-wide patent - because you'll make billions of dollars from it.

As for capacity, intelligent network design will allow for ample capacity upgrades as required. The fibre being laid is capable of supporting 40Gbps...
grumpybug
Oct 19, 2010 10:10 AM
I'm happy to be corrected as I don't claim to be optic fibre expert but doesn't this article make a mockery of Senator Conroy's claim that the fibre being laid today will last 50-60 years(Sorry I can't recall the exact source of the quote). Conroy's claim was that the fibre would always remain the same but it would be the technology at either end that would change and be plugged into the fibre.

But this statement "“The thought that the current fibre technology has infinite capacity is not true - we are beginning to hit the fundamental limits of the current technology,” Richardson told the BBC." Correct me if I'm wrong but are we not taking about the actual fibre here, the same fibre we are banking on to last 50 -60 years?

So the question then becomes what will fibre technology look like in as little as 10 years and if we have a complete network of older fibre what are the implications? Of course I suspect that the fibre from the node to the household will never reach its limits, that would be a pretty thirsty household but what about the backbone network? I suppose the option there is just to replace the elements of the backbone as required. But this has always been my concern with the whole one size fits all and the notion that we are building a future proof network. Simply we are not and how long will it be until we require another upgrade and what will the cost be of that?
umbria
Oct 19, 2010 10:29 AM
Fortunately, R&D does not stand still. The problem is not with the "optical properties of fibre", since a single strand of today's fibre sustained 69.1 Tbps over a 240 km run on 25 March 2010.

The problem is with the switches, which will need to move from electronic to optical switches. Sydney University researchers announced in May 2010 that they are patenting successful optical switch technology they have developed which will enable todays 1 Gbps and cutting-edge 10 Gbps switches to move to astronomical speeds.

The fibre laid today will handle whatever future bandwidth is demanded of it, no problems. Just update one switch and the 300 downstream users get the faster speeds, as and when they choose to install a faster NTU.

As for the backhaul, the congestion predicted is largely made up of IPTV streams. The intelligent NBN design already incorporates multicast shared video protocols, so all the downstream users watching the same channel are fed by a single stream of that channel from the backhaul.

It is indeed futureproof, and spending money on inferior technology at this point is folly.
umbria
Oct 19, 2010 10:30 AM
Correction (not 300, but 3000):
Just update one switch and the 3000 downstream users get the faster speeds, as and when they choose to install a faster NTU.
Maxxi2
Oct 19, 2010 11:39 AM
As so often happens, an *expert* states that fibre does not have *infinite* or *unlimited* capacities and then a whole bunch of armchair experts start stating this fact somehow spells doom for the NBN??

LOL... How many of you have actually looked what speeds fibre can transfer data today already?

Umbia's example is a perfect benchmark for current technologies and materials available:

69.1Tbps sustained over 240kms...

Now before any folks lacking in any understanding at all about how the internet works, it does not equate at all to reality to now begin dividing that number by 100Mbps channels and try to calculate how many people can get on that fibre strand at any one time... >;))

Don't laugh derisevly, I have seen so many posts here and on tech forums where posters did just that...

R&D does indeed not stand still, and here is a good example again:

http://www.bbc.co.uk/news/technology-11229085

There might be a 1000squilliabitps transport medium just around the corner, however if the PMG had have waited for a better medium then we would not even had our copper network in the first place...

And when limitless bandwidth telepathy becomes available at a low enough cost, I will probably use that as well, but right now the best medium with the most substantial scalability is with zero doubt fibre technologies...
DRUPS
Oct 19, 2010 4:12 PM
Ya. All those against the NBN were saying why on earth do we need 1Gbs fibre connections to the home & now they read this bit of news & all the arm chair experts now proclaim OMG see fibre only has a capacity of 70Tbs (Terabits per second) so the NBN is obsolete before it begins. Are all the Liberal supporters really so idiotic are are they all just Luddites?
MerariSchroeder
Oct 19, 2010 5:19 PM
@EMwyres "if you've got a transmission medium that has lower latency than fibre optics"
Fibre optics signals actually travel at 2/3 the speed of light. Copper and wireless signals travel at the full speed of light.

@hellfire "and many of the public believe that all users will get broadband speed of 100mb/second"
Aside from any technical limitation such as internation backhaul, most will be getting 25mb/s because anything higher will be too expensive!

@Drups "All those against the NBN were saying why on earth do we need 1Gbs fibre connections to the home"
Who cares if we can have 1Tb tomorrow! If it still costs $43bn - it's too much! I'm saying we can achieve the NBN or equivelent for much cheaper, and that it can still include FTTH.

One option is FTTN, then FTTH and can even include LTE all for less than $43bn in total. There are many options - NBNOptions.org
HubertCumberdale
Oct 19, 2010 6:11 PM
MerariSchroeder wrote:
One option is FTTN, then FTTH and can even include LTE all for less than $43bn in total. There are many options - NBNOptions.org

Please stop with the spamming, you have posted this link already 100 times now. Yes, there are many options and we chose option A. Thanks for stopping by.
HubertCumberdale
Oct 19, 2010 6:14 PM
DRUPS wrote:
Are all the Liberal supporters really so idiotic are are they all just Luddites?

I'd go with idiotic Luddites. Remember Richard Alston? The Liberal party has a long history of Luddites.
HubertCumberdale
Oct 19, 2010 6:24 PM
MerariSchroeder wrote:
One option is FTTN, then FTTH and can even include LTE all for less than $43bn in total. There are many options - NBNOptions.org

Wait you know what, your idiocy has been exposed:

http://www.theaustralian.com.au/australian-it/optus-to-trial-3g-successor/comments-e6frgakx-1225799600404

Quote:
Merari Schroeder of NoNBN.org


NoNBN.org now NBNOptions.org? Who do you work for and what is your agenda? you know what it's doesn't even matter it's just proof that you cant be taken seriously on this forum anymore. Goodbye.
mikeyx11
Oct 24, 2010 1:52 AM
@HubertCumberdale: "MerariShroeder" is actually an alias of Todd Hubers, CEO of Alivate (software company) who started NoNBN.org and then changed it to NBNOptions.org.

He uses this name instead so he can talk crap out the NBN while hiding his real identity.
HubertCumberdale
Oct 24, 2010 3:37 PM
mikeyx11 wrote:
@HubertCumberdale: "MerariShroeder" is actually an alias of Todd Hubers, CEO of Alivate (software company) who started NoNBN.org and then changed it to NBNOptions.org.

He uses this name instead so he can talk crap out the NBN while hiding his real identity.


hmmm, interesting, I must admit I've never heard of Alivate before, not that it really matters...

Quote:
Initiatives‎ > ‎
Supercharged Internet
Supercharged internet involves a series of research elements unlocking technology to enable internet speeds of up to 500Gbps in a wireless network. We are actively seeking academic partners to research this domain, and put Australia at the forefront of super-fast and affordable internet technology.
If you have an interest in this initiative, don't hesitate to contact us.


The motives are more clear now.

Still curious about the donation thing on NBNOptions.org though, what if household in Australia donated $5000 to the cause would they build the NBN and then dismantle it? Also I'm gonna start a new website called NoWirelessCrap.org!
realitybites
Oct 25, 2010 1:53 PM
"“The thought that the current fibre technology has infinite capacity is not true - we are beginning to hit the fundamental limits of the current technology,” Richardson told the BBC."

Who, exactly, thought fibre (or anything for that matter) was infinite? Better not be those damn boffins again!
Comments have been disabled for this article.
 
 
 
Top Stories
Australian miners send drones to work
In-depth: Unmanned aerial vehicles in the resources sector.
 
The New Zealand telco problem
Opinion: Could Telstra save Kiwi telcos?
 
IT price probe to 'name and shame' gougers
Industry ducking the issue, committee claims.
 
Sign up to receive iTnews email bulletins
   FOLLOW US...

Latest VideosSee all videos »

Latest Comments
Polls
Should the Government enact new legislation to protect copyright holders in the digital age?

   |   View results
Yes
  19%
 
No
  81%
TOTAL VOTES: 493

Vote