[Bloat] Usage Based Billing - It's All About Perceived Congestion
James.Gettys at alcatel-lucent.com
Tue Mar 1 07:36:57 PST 2011
On 03/01/2011 08:57 AM, Steve Bauer wrote:
> On Mon, Feb 28, 2011 at 4:56 PM, richard<richard at pacdat.net> wrote:
>> The result is:
>> It's aimed at the public and non-technical so allow me a few missing
>> things in the explanations :)
> Hi Richard,
> You recommended to your readers:
> "You want to bug your ISP to turn off any/all "helper" buffering in
> your modem that purports to "increase upload speed for short periods"
> since this is buffering and part of the problem."
> I am assuming you intended that to apply to Powerboost. Based upon my
> understanding of various implementations of Powerboost,
> turning it off would *not* help with latency under load simply
> because the buffer sizes are fixed in today's cable modems.
> So these issues are orthogonal. There are certainly
> problems, but turning off Powerboost isn't part of the fix.
> Indeed, turning Powerboost off could make the problem worse. A
> buffer that would otherwise have drained if Powerboost was in effect,
> would be more likely to have a queue of packets sitting in it adding
> additional latency to later arrivals. Again, my key assumption is
> that disabling Powerboost simply doesn't change the buffer size.
> As always, happy to be proved wrong. :-)
I think you are correct, Steve, and turning it off will just make the
At the moment, I think these buffers are static in these technologies;
turning off Powerboost or equivalent features will just make the
We're going to have to be adaptable to variable bandwidth anyway. AQM
is ultimately the only solution.
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