Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 
5971 posts

Uber Geek
+1 received by user: 109

Trusted
Subscriber

  Reply # 751252 26-Jan-2013 17:54 Send private message

As posted earlier 5uSec/km

Cyril

1340 posts

Uber Geek
+1 received by user: 285

Subscriber

  Reply # 751257 26-Jan-2013 17:58 Send private message

cyril7: As posted earlier 5uSec/km

Cyril


Thanks, also it would seem intuitive (to me at least) that the speed of electricity would be slower (than the speed of light) through copper cables along the way.

135 posts

Master Geek
+1 received by user: 2


  Reply # 751259 26-Jan-2013 18:08 Send private message

I follow a great channel on YouTube called periodic videos and i remember watching one about this question a while back. From what i remember the data/light actually slows down as it goes and is then boosted back up to speed every now and then with some sort of special conductor made of a rare metal. So I guess that would slow it down too.

Also I think electricity travels at the speed of light in a perfect setting. Super cooled conductors can get pretty close.

2391 posts

Uber Geek
+1 received by user: 292
Inactive user


  Reply # 751263 26-Jan-2013 18:22 Send private message

RunningMan:
freitasm: It takes the light around 35ms to travel between Auckland and Los Angeles. Round trip is 70ms.

Add to this from your home to the ISP, then from Los Angeles to whatever place the server you want to reach is located, then take in consideration the server load and pretty much you won't get less than 100ms to USA from New Zealand.


And that's of course assuming that whatever medium transports the signal takes the shortest straight line route, and there's no other devices like repeaters or similar that artificially increase the length...


Some interesting info

Microwaves faster than fibre optics


Why microwaves? Is the speed of light too slow, as traders have complained? The Journal reports that microwaves take 4.25 milliseconds to travel between New York and Chicago, beating the 6.55 milliseconds for infrared light traveling through a fibre-optic cable, attributing the difference to more bends in the cable. 

That's not quite right. Both light and microwaves are electromagnetic waves, so they should travel at the cosmic speed limit of about 300,000 kilometres per second. At that speed, they should take only about 4 milliseconds to make the 1200-kilometre journey between Chicago and New York. 

But that universal speed limit occurs when electromagnetic waves move through a vacuum - they travel more slowly through materials. Light signals travel through the glass core of an optical fibre at about 200,000 kilometres per second. By contrast microwaves go through air, which barely slows them down at all. In the world of high stakes flash trading, even that small difference adds up to big money.


Who knows, maybe one day fibre-optics will be too slow.


 

1340 posts

Uber Geek
+1 received by user: 285

Subscriber

  Reply # 751543 27-Jan-2013 17:17 Send private message

Klipspringer:
RunningMan:
freitasm: It takes the light around 35ms to travel between Auckland and Los Angeles. Round trip is 70ms.

Add to this from your home to the ISP, then from Los Angeles to whatever place the server you want to reach is located, then take in consideration the server load and pretty much you won't get less than 100ms to USA from New Zealand.


And that's of course assuming that whatever medium transports the signal takes the shortest straight line route, and there's no other devices like repeaters or similar that artificially increase the length...


Some interesting info

Microwaves faster than fibre optics


Why microwaves? Is the speed of light too slow, as traders have complained? The Journal reports that microwaves take 4.25 milliseconds to travel between New York and Chicago, beating the 6.55 milliseconds for infrared light traveling through a fibre-optic cable, attributing the difference to more bends in the cable. 

That's not quite right. Both light and microwaves are electromagnetic waves, so they should travel at the cosmic speed limit of about 300,000 kilometres per second. At that speed, they should take only about 4 milliseconds to make the 1200-kilometre journey between Chicago and New York. 

But that universal speed limit occurs when electromagnetic waves move through a vacuum - they travel more slowly through materials. Light signals travel through the glass core of an optical fibre at about 200,000 kilometres per second. By contrast microwaves go through air, which barely slows them down at all. In the world of high stakes flash trading, even that small difference adds up to big money.


Who knows, maybe one day fibre-optics will be too slow.


 


I wonder if the microwave link is faster because the total distance between Chicago and New York is somewhat shorter via MW link than it is by fibre? The article doesn't say which route is the shortest.

2029 posts

Uber Geek
+1 received by user: 333

Subscriber

  Reply # 751556 27-Jan-2013 17:37 Send private message

The other thing you are forgetting is that ICMP traffic might get kicked down the ranks in terms of telecoms QoS. Just because your icmp packets takes a long time to return. Doesn't mean your tcp packets are taking as long to do a trip.

I had a boarder who was a gamer and was constantly moaning about his ping times being slow. I constantly told him that one, it isn't a true representation of what his tcp packets are doing and two, i dont care.

What Ragnor has suggested will do speed things up. Also the fact you are on conklin is going to slow things down. Maybe there is a wireless provider in your area that can give you a better quality connection.

2699 posts

Uber Geek
+1 received by user: 399


  Reply # 751568 27-Jan-2013 17:52 Send private message

DarthKermit:
I wonder if the microwave link is faster because the total distance between Chicago and New York is somewhat shorter via MW link than it is by fibre? The article doesn't say which route is the shortest.


From an earlier post:


Light signals travel through the glass core of an optical fibre at about 200,000 kilometres per second. By contrast microwaves go through air, which barely slows them down at all. In the world of high stakes flash trading, even that small difference adds up to big money.

1340 posts

Uber Geek
+1 received by user: 285

Subscriber

  Reply # 751636 27-Jan-2013 20:34 Send private message


Light signals travel through the glass core of an optical fibre at about 200,000 kilometres per second. By contrast microwaves go through air, which barely slows them down at all. In the world of high stakes flash trading, even that small difference adds up to big money.


That's assuming that the figures quoted in that article are correct. I don't know if they are or not.

2391 posts

Uber Geek
+1 received by user: 292
Inactive user


  Reply # 751663 27-Jan-2013 21:18 Send private message

DarthKermit:

Light signals travel through the glass core of an optical fibre at about 200,000 kilometres per second. By contrast microwaves go through air, which barely slows them down at all. In the world of high stakes flash trading, even that small difference adds up to big money.


That's assuming that the figures quoted in that article are correct. I don't know if they are or not.


Its definitely correct. 
Here is an article from Aviat Networks that specializes in low latency microwave solutions.

http://www.aviatnetworks.com/solutions/low-latency-microwave/

In High Frequency Trading (HFT) applications where computers can make millions of decisions in fractions of a second, receiving data even a single millisecond sooner can equate to a distinct advantage and generate significant profits.According to Information Week Magazine¹: “A one (1) millisecond advantage in trading applications can be worth $100 million a year to a major brokerage firm”. Currently electronic trading makes between 60% and 70% of daily volume of NYSE¹. Tabb Group, a research firm, estimated that High-frequency traders generated about $21 billion in 2008.

Microwave signals travel through the air about 50% faster than light through optical fiber. Latency in a data communications circuit, or the time difference between sending a request for data and receiving the reply, will consequently be longer over a fiber circuit than a microwave circuit of the exact same length.
  • Latency is largely a function of the speed of light, which is 299,792,458 meters/second in vacuum. Microwave signals travel through the air at approximately the same speed as light through a vacuum and will have a latency of approximately 5.4 microseconds for every mile of path length. Light travel in optical fiber has latency of 8.01 microseconds for every mile of cable, due to the refraction in the fiber. When data has to travel over 1400 miles from Chicago to New York and back again the latency difference due to the communications medium alone is more than 3.5 milliseconds.




109 posts

Master Geek
+1 received by user: 20

Trusted

  Reply # 752587 29-Jan-2013 12:43 Send private message

The obvious answer is to put game servers in Hawaii!




“I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything.” - Nikola Tesla

Disclaimer: Views expressed in my posts do not necessarily reflect those views of my employer.



225 posts

Master Geek
+1 received by user: 13


  Reply # 752594 29-Jan-2013 12:47 Send private message

quakeguy: The obvious answer is to put game servers in Hawaii!


Likes!

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

Speed limit when overtaking? Teach me please.
Created by nakedmolerat, last reply by lxsw20 on 25-Oct-2014 00:04 (72 replies)
Pages... 3 4 5


Neon - Sky's new streaming service
Created by JarrodM, last reply by Ronin on 24-Oct-2014 22:40 (19 replies)
Pages... 2


House Auctions
Created by t0ny, last reply by mattwnz on 25-Oct-2014 00:18 (36 replies)
Pages... 2 3


Spark Socialiser
Created by freitasm, last reply by freitasm on 22-Oct-2014 18:39 (34 replies)
Pages... 2 3


VDSL, which router/modem sub $200?
Created by TeaLeaf, last reply by TeaLeaf on 24-Oct-2014 23:26 (16 replies)
Pages... 2


30 too old to get into IT?
Created by Interslice, last reply by shk292 on 24-Oct-2014 20:39 (16 replies)
Pages... 2


American legal jurisdiction in New Zealand
Created by ajobbins, last reply by gzt on 21-Oct-2014 14:58 (30 replies)
Pages... 2


iPad Air 2 and iPad Mini 3. Gonna get one?
Created by Dingbatt, last reply by Geektastic on 24-Oct-2014 23:11 (108 replies)
Pages... 6 7 8



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.