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From: Jonathan Morton <chromatix99@gmail.com>
To: Albert Rafetseder <albert.rafetseder+bufferbloat@univie.ac.at>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] "a bandwidth breakthrough"
Date: Wed, 24 Oct 2012 18:54:51 +0300	[thread overview]
Message-ID: <7DA59680-1CD7-4BAF-B23C-65A0C8E012D9@gmail.com> (raw)
In-Reply-To: <907294EF-570F-473D-A87A-B6238B6EA733@univie.ac.at>

>> I'm actually sort of surprised that the inter-packet version isn't already built into wireless technologies by default, especially the ones that do packet aggregation.  In any case it is not totally new - a very similar idea is used in CDs.
> 
> In the case of the four Austrian 3.99G mobile operators we tested,
> the fun answer is that they completely conceal loss on layer 2. As
> a side effect, they delay packets by sometimes huge amounts: Waiting
> for an ICMP echo reply can take a few hundred seconds (!), think
> trains in tunnels, but packets do arrive eventually.

But that's not FEC, it's ARQ.  And that's precisely why FEC can be better than ARQ.

 - Jonathan Morton


  reply	other threads:[~2012-10-24 15:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-23 21:24 Dave Taht
2012-10-24  0:39 ` Jonathan Morton
2012-10-24 14:49   ` Albert Rafetseder
2012-10-24 15:54     ` Jonathan Morton [this message]
2012-11-04 15:46 ` Richard Scheffenegger

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