From: Jan Ceuleers <jan.ceuleers@gmail.com>
To: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] [aqm] the side effects of 330ms lag in the real world
Date: Wed, 30 Apr 2014 08:53:46 +0200 [thread overview]
Message-ID: <53609DFA.9040708@gmail.com> (raw)
In-Reply-To: <87bnvkkr2n.fsf@toke.dk>
On 04/29/2014 07:01 PM, Toke Høiland-Jørgensen wrote:
> However, as that graph shows, it is quite possible to completely avoid
> bufferbloat by deploying the right shaping. And in that case fibre
> *does* have a significant latency advantage. The best latency I've seen
> to the upstream gateway on DSL has been ~12 ms.
I am not an expert, but I believe that this is due to the use of
interleaving. This is a method to improve the strength of forward error
correction by spreading out the effects of impulse noise on DSL lines
across multiple reed-solomon-protected codewords at the expense of latency.
The topic is briefly discussed on the ADSL Wikipedia page.
next prev parent reply other threads:[~2014-04-30 6:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-29 1:24 [Bloat] " Dave Taht
2014-04-29 7:08 ` [Bloat] [aqm] " Mikael Abrahamsson
2014-04-29 7:21 ` Fred Baker (fred)
2014-04-29 7:56 ` Mikael Abrahamsson
2014-04-29 15:46 ` Dave Taht
2014-04-29 16:51 ` Aaron Wood
2014-04-29 16:44 ` Jim Gettys
2014-04-29 16:57 ` Jim Gettys
2014-04-29 17:01 ` Toke Høiland-Jørgensen
2014-04-29 17:07 ` Jim Gettys
2014-04-29 18:09 ` Greg White
2014-04-30 3:21 ` Dave Taht
2014-04-30 6:53 ` Jan Ceuleers [this message]
2014-04-30 8:19 ` Pedro Tumusok
2014-04-30 8:30 ` Mikael Abrahamsson
2014-04-29 17:02 ` Dave Taht
2014-04-30 6:16 ` Mikael Abrahamsson
2014-04-29 7:43 ` Tristan Seligmann
2014-04-29 23:01 Hal Murray
2014-04-29 23:26 Michael Spacefalcon
2014-04-29 23:56 ` Steinar H. Gunderson
2014-04-30 0:14 ` Hal Murray
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