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German Researchers Hit 40 Gbps On Wireless Link
judgecorp writes "German researchers from the Fraunhover and Karlsruhe institutes have achieved 40Gbps transfers over 1km using a wireless link. The new record raises the hope that point-to-point wireless could be used instead of expensive fibers in some rural broadband applications."
Partially thanks to transmitting between 200GHz and 280GHz.
Here's another obligatory question
3. How many Australian Luddites care about what's happening in Germany?
Enquiring minds want to know
on the link quality. I'd bet a light mist will halve the throughput.
He tried to kill me with a forklift!
What part of "point to point" did you not understand?
It has more or less the same effect as the same amount of energy put into wired solutions. In other words, the only relevant question is how it affects total energy consumption.
1. How the hell is this going to fare in a real world test where a metropolis of people oversaturates the frequency?
From the summary.
...used instead of expensive fibers in some rural broadband applications
The higher the frequency, the more like light. It is a highly directional transmission, so unless there is another source of 200-280GHz signals within a few degrees of the transmitter sending in the direction of the receiver, there's not going to be interference.
When somebody tells you that fiber is a waste of money, ask them if we should stop building those expensive roads as well, because we can all fly helicopters instead.
this can be usefull for tower-to-tower comunication. the last mile can be 3/4G or even wifi.
Wireless LAN access points send at less than 1W (much less, depending on the regulatory domain), which is eventually converted to heat. Your brain on the other hand turns more than 10W of chemical energy into waste heat and you have only that stupid comment to show for it.
How many Australian luddites are going to look at this say that the national fibre-optic broadband network rollout is going to be made obsolete by this wireless tech?
A 1km range is next to nothing for rural Australian
Well, I'm sure you've heard that Adolf Hitler was an Australian!
Religion is what happens when nature strikes and groupthink goes wrong.
Has nothing todo with hovering ;)
For those not wanting to read TFA:
It's two institutes: The Fraunhofer Institute for Applied Solid State Physics and the Karlsruhe Institute for Technology. Karlsruhe is a city, not an institute.
A 1km range is next to nothing for rural Australian
For Texans, 1 mile is "neighbors" . . .
. . . 100 miles is "just down the road" . . .
. . . 1000 miles is "just down the road, aways" . . .
Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
No, two points!
Your average wifi antenna radiates 100mW.
Doing some very rough calculations in an hour that will heat a litre of water by about 0.08 degrees Celsius assuming that the water can't lose any heat to its environment.
Compared to say 2000 Watts for a microwave that does cook food with 'wireless energy'.
Also compare that with just the temperature from your car's engine and exhaust gasses.
I think the latter wins hands down.
yeah but helicopters are expensive compared to cars. I'm fairly certain that this setup is cheaper than the amount of fiber its replacing.
"His name was James Damore."
yeah but helicopters are expensive compared to cars. I'm fairly certain that this setup is cheaper than the amount of fiber its replacing.
Give this man a cigar!
Hopefully it will not rely on any "proprietary" tech so it can't be priced at $5 million per radio or, (cost of building fiber - 10%).
Who did what now?
You read 40Gbps and assumed the idea was for all that bandwidth to be used by only ONE person? Maybe, you know, the point is to create a point-to-point trunk that would serve a whole rural COMMUNITY.
That's the thrust of it: You get service into these communities and they can bury their own media, whatever they want it to be. Or redistribute on a different wireless band to neighborhood homes via Wi-Max...
Who did what now?
This band is not useful for long haul carriage due to atmospheric water vapor absorption. According to this chart, absorption between 200 and 280 GHz varies between 3 and 40 dB/km. That means at the low end only 50% of your signal is absorbed every km. At the high end, only 1/10,000th of your signal remains after each km.
this post speaks to similar issues including refraction.
Tiller's Rule: Never use a word in written form that you've only heard and never read. You will end up looking foolish.
A 1km range is next to nothing for rural Australian
For Texans, 1 mile is "neighbors" . . .
. . . 100 miles is "just down the road" . . .
. . . 1000 miles is "just down the road, aways" . . .
Heh, I know people in the US like to think Texas is big, but the truth of the matter is that the area of the state of Texas is just under 700 thousand sq km, while the area of the state of Western Australia is a bit over 2.5 million sq km.
That's about 3.5 Texii*.
* I know - Texii probably isn't the correct plural for Texas, but Texases just sounded wrong.
You can never know everything, and part of what you do know will always be wrong. Perhaps even the most important part.
Offtopic? This is not a secret that RIAA and the like are not investing any effort in building faster infrastructures ( quite the opposite ). If history was made based on their whims, we'd still be using vinyl records, without even a cassette to make a copy... At 40Gbps, a HD movie is copied within a second...
Slashdot, fix the reply notifications... You won't get away with it...
...and how many repeaters would you need to cross the Aussie Outback if the range is all of 1km?
Excuse me, but please get off my Pennisetum Clandestinum, eh!
Aye, I spent some time with family up "near" southern cross, "near" kalgoorlie, where the nearest house was around 200km away. Go bush around here, and distances get epic.
Excuse the Unicode crap in my posts. That's an apostrophe, and slashdot is busted.
Go bush around here, and distances get epic.
. . . which is probably way off the rural scale in Germany, where the system was developed.
Folks in Germany see Australia on TV as a place where B-celebrities are sent to eat nasty looking creepy-crawlers and bathe in kangaroo poo. And then whine and bitch about each other to see who gets to stay the longest.
So how does one stay connected in southern cross . . . ?
Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
The question really is, why are there so many kangaroos in Austria?
--
BMO
Probably all of the ones that want an excuse to kill off the current broadband rollout.
The issue is that this is only going to be replacing a single fiber. You never run a single fiber except short loops to your endpoint customers. This could potentially replace the point-to-point links for the "last mile", until such time as you get enough subscribers to make it worth your time to trench the land and run a bundle of fiber.
shouldn't we be investing research into subspace communications? Seems to me that would be the next logical step forward
In rural Australia 100 miles is "neighbors" :(
There is no correct way to pluralize Texas, there can be only one Texas. Anyway, just because Australia or Alaska or Siberia are larger, doesn't mean Texas still isn't a big place. You can drive from Beaumont, Texas to Los Angeles and by the time you're halfway there, you're still in Texas.
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
Given the standards organizations' propensity to drag things out (802.11n anyone? (7 years)) This is nice from a research perspective but probably years away from having practical equipment you can use.
Why not FSO, or microwave? Running wireless at long distances has already been done. http://en.wikipedia.org/wiki/Long-range_Wi-Fi If you look at that long range Wi-Fi link, those are some substantial distances. Sure, not 1Gbps but they work.
I have a customer with an openWRT setup running 802.11a at 1/2 mile, un-amplified with off the shelf antennas. That's basically, off-the-shelf running in already allocated spectrum.
Of course if you're looking for very low cost, you can get IP running on waxed string. (I remember seeing a demonstration at INTEROP where IP communications occurred over a piece of string between two systems.)
Harrison's Postulate - "For every action there is an equal and opposite criticism"
Not Blücher? http://www.youtube.com/watch?v=zdIID_TGwhM
Harrison's Postulate - "For every action there is an equal and opposite criticism"
In rural Australia 100 miles is "neighbors" :(
Please don't mention Australia and neighbours in the same sentence. Now I have that terrible signature tune going through my head.
Technicians from the German Telekom immediately showed up to cap the link to 300kbps due to excessive use of bandwith...
Oh, the beautiful gloss of greality!
1. How the hell is this going to fare in a real world test where a metropolis of people oversaturates the frequency?
You do realize they said *point-to-point wireless could be used instead of expensive fibers in some rural broadband applications*, right? How many rural metropolises do you know of?
So, you got one large province, which has some pretty big empty expanses. But, being from Canada, I'd have to say you have nothing on us. And We probably having nothing on Russia. I mean, the Sakha state/province consists of over 3 million square kilometers. They also have Krasnoyarsk Krai which is 2.3 million square kilometers. And the size of the country is over 17 million square kilometers. Canada and Australia on the other hand both have much lower population densities than Russia.
Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
Are they planing on supplying Internet Porn to the Australian outback tribes or something? =)
The article is a puff piece which ignores the massive amount of data lost through connection drops, forced restarts & reloads YouTube and many other sites cause/require, as well as the ever-increasing bandwidth necessary due to "cloud" services, software-as-a-service, growing page programming/scripting and third-party & indirect loads (predictive actions, agents, ads, iFrames, etc.).
you are not going to have massive range at 200 and 280 GHz
So that's what WWII was about.
"If we can't have nice things, then I'm going to break everybody else's things!"
Sleep your way to a whiter smile...date a dentist!
I've aimed microwave STLs before and that was a royal pain in the ass. In the hundreds of gigahertz range aiming the antennas has got to be a bitch. And damn well better make sure the mast and mountings will never shift under wind pressure.
-- Jimtown Kelly
You can drive from Beaumont, Texas to Los Angeles and by the time you're halfway there, you're still in Texas.
This doesn't mean anything. You could say that New Mexico is bigger than Texas by saying, "You can drive from Farmington, New Mexico to Odessa, Texas and by the time you're halfway there, you're still in New Mexico."
The question really is, why are there so many kangaroos in Austria?
--
BMO
Because kangaroo marriage is STILL illegal in the USA.
But if we legalize kangaroo marriage, people will be marrying their furniture!
We don't want that now, do we?
--
BMO
Thanks for the info.
I figured it was probably not a problem, but did not really know.
Down With Slashdot BETA!!! I've been around the corner and seen the oliphant; you can only abuse me from your perspecti
Context is everything. Beaumont is in the middle of the country (East-West) and L.A. is on the coast.
You're right about context...
Beaumont is on the Eastern-most edge of Texas and L.A. is at the Southern end of a tall, but narrow, state.
You can drive from Crescent City, California to El Paso, Texas and by the time you're halfway there, you're still in California."
But if we legalize kangaroo marriage, people will be marrying their furniture!
We don't want that now, do we?
--
BMO
That ottoman LIES! That stain is from leather polish.
I heard you talking sweetly to the ottoman. I thought you were on your cellphone, but then I saw the bluetooth earpiece on the kitchen counter.
Fess up!
--
BMO
I heard you talking sweetly to the ottoman. I thought you were on your cellphone, but then I saw the bluetooth earpiece on the kitchen counter.
Fess up!
--
BMO
Yeah.. the kitchen counter asked if it could make a booty call to the lawn chair.
Marry me.
Heh.
have a great effin' day.
--
BMO