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Author Topic: Why Is Downloading So Much Faster Than Uploading ?  (Read 20210 times)

Offline neilep

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Wocha Peeps,

As ewe may or may not know I recently resolved my long term ailing connection to this site by changing to a new ISP. Now that I am experiencing blistering fast connection speeds the difference between uploading and downloading is far more obvious !


So, why is downloading so much faster than uploading ?...the ratio I get is circa 5-1.

whajafink ?

Thanks







Neil
« Last Edit: 18/08/2011 01:33:40 by neilep »


 

Offline SeanB

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #1 on: 13/08/2011 12:31:06 »
The A in ADSL stands for Asymmetric. The common need for most is that you download much more than you send, mostly getting a big number of data packets, whilst sending only a few small packets that acknowledge the data. Thus the bandwidth down is so much more.

The only connections that have equal speeds up and down are optical fibre, and with copper ISDN or Ethernet. All others, like ADSL, cable and satellite, work on the download being more than the upload. For most users this is fine, unless you are producing a data stream, of video or high quality audio, that you want to send out to another point somewhere on the internet. You can get a business class of line, where the split is more even, but then you generally pay more.
 

Offline neilep

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #2 on: 13/08/2011 13:13:49 »
The A in ADSL stands for Asymmetric. The common need for most is that you download much more than you send, mostly getting a big number of data packets, whilst sending only a few small packets that acknowledge the data. Thus the bandwidth down is so much more.

The only connections that have equal speeds up and down are optical fibre, and with copper ISDN or Ethernet. All others, like ADSL, cable and satellite, work on the download being more than the upload. For most users this is fine, unless you are producing a data stream, of video or high quality audio, that you want to send out to another point somewhere on the internet. You can get a business class of line, where the split is more even, but then you generally pay more.

Thank ewe very much SeanB.

I am grateful for your response.

It is true that I personally download more than I upload ...it's just that I was not too sure of the specific reason for the differences in speed. Presumably, as you infer, to upload at the same speeds incurs higher cost, so I assume it is a technological issue as ewe describe.


Thanks again


neil
 

Offline syhprum

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #3 on: 13/08/2011 20:00:14 »
I have the Virgin fibre optic system and my download is 10 Mbits/sec while my upload is 512Kbits/sec.
 

Offline neilep

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #4 on: 13/08/2011 20:30:47 »
I have the Virgin fibre optic system and my download is 10 Mbits/sec while my upload is 512Kbits/sec.

I'm surprised that with fibre optic you're not getting much faster speeds...unless it's a processor issue !

I'm embarrassed to say that with BT infinity I have been averaging 37.7mb/sec download and 7mb/sec upload !



......which is nice !  ;D
 

Offline Geezer

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #5 on: 13/08/2011 22:01:43 »
I think they limit the upload speed so that you can't host a pornophonographic website from under your bed.
 

Offline demografx

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #6 on: 13/08/2011 23:05:38 »

As ewe may or may not know I recently resolved my long term ailing connection to this site by changing to a new ISP.


Aren't there competent bobbies in YOUR vicinity? Why switch to new ISP?
http://www.isp.state.il.us/

As I am now a Neilep Level Member, don't I have the right to know such things???  ;D ;D
« Last Edit: 14/08/2011 17:27:29 by demografx »
 

Offline Don_1

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #7 on: 17/08/2011 16:47:50 »
Now I, of course, don't wish to nit pick, but......

Quote from: sheepy question
Why Is Downloading So Much Faster Than Uploading ?

....why is uploading so much faster than downloading ?...

Make up your mind....... I have trouble enough answering questions as it is...... you're just making it even more difficult.....
 

Offline neilep

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #8 on: 18/08/2011 01:34:25 »
I think they limit the upload speed so that you can't host a pornophonographic website from under your bed.

So it's ok above my bed ?
 

Offline neilep

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #9 on: 18/08/2011 01:36:52 »

As ewe may or may not know I recently resolved my long term ailing connection to this site by changing to a new ISP.


Aren't there competent bobbies in YOUR vicinity? Why switch to new ISP?
http://www.isp.state.il.us/

As I am now a Neilep Level Member, don't I have the right to know such things???  ;D ;D

Yep..I have contracted with the state police of Illinois because I hear they provide great broadband !...what's their motto again ?...." To Provide Data and Serve "
 

Offline neilep

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #10 on: 18/08/2011 01:38:00 »
Now I, of course, don't wish to nit pick, but......

Quote from: sheepy question
Why Is Downloading So Much Faster Than Uploading ?

....why is uploading so much faster than downloading ?...

Make up your mind....... I have trouble enough answering questions as it is...... you're just making it even more difficult.....

Ewe still did though didn't ya  !! ;)


DOH !!...I haz a mistake....me haz fixed it !!
 

Offline techmind

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #11 on: 19/08/2011 21:50:54 »
The A in ADSL stands for Asymmetric. The common need for most is that you download much more than you send, mostly getting a big number of data packets, whilst sending only a few small packets that acknowledge the data.

A telephone line (and many other communications media) typically has an overall limit on the total amount of data it can carry in either direction at any one time. In the case of standard ADSL this is around 8Mbps if you live within a mile or so of the telephone exchange. It's an arbitrary engineering (and marketing) decision how you apportion that 8Mbps between uploading and downloading. Because it is assumed that domestic users will be net downloaders by a large margin, the consumer ADSL product is biassed that way - to maximise the download speed (which most people will care more about).

ADSL conveys data on hundreds of carrier frequencies at 4kHz intervals starting at about 26kHz and going all the way up to a megahertz or so (1000kHz). The first 26 or so of these carriers are allocated to upstream (upload) while the remaining 224 or so (depending on line quality and distance to the exchange) are allocated to downstream comms (download).

See also: http://en.wikipedia.org/wiki/ADSL

I think some business broadband services use a symmetrical varient of the system (SDSL) as a business may spend as much time sending stuff to their suppliers or customers (uploading) as they do receiving.


It does beg the question whether the capacity really has to be pre-allocated or whether in principle the balence could be dynamically shifted according to the immediate load demands. I suspect there are implications for the cost of the consumer modem and engineering reasons relating to inter-customer (inter-telephone-line) interference (and longwave radio interference) which have also driven the system we have in ADSL.
« Last Edit: 19/08/2011 21:57:26 by techmind »
 

Offline Geezer

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #12 on: 20/08/2011 17:34:31 »
I think it's because Sheepies attract data.
 

Offline nicephotog

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Why Is Downloading So Much Faster Than Uploading ?
« Reply #13 on: 27/10/2011 11:54:15 »
if you see it from the perspective of serving data , the data on a public server is available to everyone , and many more servers that you are not sending to will be sending "common and popular requested data" past. "when dealing with your material, its private" and of no consequence to everyone else and not processed (as ready!) on the "public server end" , so the speed out(FROM) of the server is for everyone in the world(so to say), and the speed to you(here it is , hate to drag your attention away from your mirror) is for everyone , BU' SOD MATE , YER ARNT TAKIN UP MY TIME JUS' F'N F'YOU , I'LL DO IT BU' SHUDDUP AN BE PATIENT OR BE A PATIENT WHILE I GET Y'PERSONAL TRIPE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
« Last Edit: 27/10/2011 11:56:17 by nicephotog »
 

Offline wolfekeeper

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #14 on: 19/02/2012 01:51:02 »
I think I read somewhere, more than a decade ago, that ADSL is asymmetric, because by the time a signal has travelled down a line, it's a lot weaker. At the consumer's end you just need to boost it with an amplifier, it's no big deal.

At the exchange end on the receiver it's a bit more complicated, because they have different signals coming into the exchange with radically different strengths, and so there's potentially cross-talk between the lines, because ADSL lines aren't shielded at all. So they slow the transmission rate, and this helps deal with the cross-talk.

I wasn't particularly aware of SDSL, but it may be they shield the lines at the exchange end to make it work, and put extra effort in to make sure the particular line will work.
 

Offline Gordian Knot

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #15 on: 27/02/2012 16:45:12 »
Treading on dangerous ground here, cause I am not 100% about my the facts. With that said, I always thought the issue was far simpler than all of the above. One's upload speed is slower than one's download speed because that is how it is set by your ISP. As has been mentioned already, most people download far more than they upload, so most ISP plans have a fairly robust download speed, and are given a paltry upload speed.

Syhprum's plan is typical, ..... [his] download is 10 Mbits/sec while his upload is 512Kbits/sec.

If one requires or wants faster upload speeds, one only has to pay your ISP more money and you can get just about any upload speed you want, including equal to a typical download speed. People who are serious online gamers know this better than most, as they are required to bump their upload speed because in gaming speed is everything.

Bottom line, if you upload more than the average person, contact your ISP. They will be more than happy to boost your upload speed for you. For a price, of course!
 

Offline wolfekeeper

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #16 on: 27/02/2012 16:56:01 »
Not really, not in the UK, the upload and download speeds that the ADSL modem can achieve are limited by the range and equipment at the telephone exchange you're connected to. The ISP hasn't got much directly to do with that, although they can further restrict it (although they won't usually, they tend to give you a total monthly download/upload limit).

For example my adsl modem says:

ADSL Link Speed    7456   kbps    448   kbps

and I can't go above that (although I could pay for a better modem to be installed at the exchange, if the line is suitable for that.)

(Actually, gamers aren't usually particularly bothered about raw download and upload speed, they're more interested in whether their packets get delayed at the ISP or not, and ISPs often have special packages where their game-related packets get prioritised, it means that when they push the fire button, the gun goes off almost immediately rather than waiting for 100ms.)
« Last Edit: 27/02/2012 17:06:13 by wolfekeeper »
 

Offline Geezer

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #17 on: 27/02/2012 18:22:57 »
The last thing you want to do in a network is hang on to data any longer than you have to, so it doesn't make much sense to throttle outbound traffic. The situation is a bit different on the receive side because you are trying to achieve some level of fairness for inbound traffic.
 

Offline wolfekeeper

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #18 on: 27/02/2012 18:38:50 »
Yes, and it pays to prioritise packets, so latency sensitive traffic (like gaming and VOIP) should jump the queue and go first wherever possible.
 

Offline Gordian Knot

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #19 on: 27/02/2012 22:20:21 »
Not really, not in the UK, the upload and download speeds that the ADSL modem can achieve are limited by the range and equipment at the telephone exchange you're connected to. The ISP hasn't got much directly to do with that, although they can further restrict it (although they won't usually, they tend to give you a total monthly download/upload limit).


Interesting. It works differently here in the U.S. One popular phone company offers FiOS plans at varying speeds. You can pick a package that will get you 15/5 Mbps, or 25/25, or 50/20. It just depends on how much you want to pay. Of course these options are available in or near major urban centers where the phone companies have paid to lay down the new cables. If one lives out in the boonies, choices are much more restricted.
« Last Edit: 27/02/2012 22:24:33 by Gordian Knot »
 

Offline wolfekeeper

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #20 on: 27/02/2012 22:28:05 »
Yeah, it's different in the UK on ADSL, we run ADSL to the exchange and that carries ATM traffic on top of it that connects the subscribers to the ISPs, and the ISPs terminate the ATM and pull out the IP traffic that runs on ATM; and then they connect to the internet.

So my modem is doing IP over ATM over ADSL and I live hundreds of miles from my ISP.

BT just runs the ADSL and local exchanges and the fiber or whatever between them, and the ISPs are independent and they pay a fixed sum to BT for access to me.

What it means is that you can switch ISPs reasonably easily, it just takes a few weeks at most. It means there's much more competition for internet access and they can't afford to mess their customers about with network non neutralities.
« Last Edit: 27/02/2012 22:32:27 by wolfekeeper »
 

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Re: Why Is Downloading So Much Faster Than Uploading ?
« Reply #20 on: 27/02/2012 22:28:05 »

 

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