[157485] in North American Network Operators' Group
Re: Coded TCP
daemon@ATHENA.MIT.EDU (George Herbert)
Tue Oct 23 23:39:06 2012
In-Reply-To: <CABRP1o92jGpBz2yi+AgCve34TaNgdHT7X3PRjeBY-BoxNp4BHQ@mail.gmail.com>
From: George Herbert <george.herbert@gmail.com>
Date: Tue, 23 Oct 2012 20:38:46 -0700
To: Rodrick Brown <rodrick.brown@gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Modeled with just simple FTP sessions?
Ugh: they admitted to having MIT backbone packet traces to analyze, and then=
used that simple of a simulator...
George William Herbert
Sent from my iPhone
On Oct 23, 2012, at 8:29 PM, Rodrick Brown <rodrick.brown@gmail.com> wrote:
> "With coded TCP, blocks of packets are clumped together and then
> transformed into algebraic equations that describe the packets. If
> part of the message is lost, the receiver can solve the equation to
> derive the missing data. The process of solving the equations is
> simple and linear, meaning it doesn't require much processing on
> behalf of the router/smartphone/laptop. In testing, the coded TCP
> resulted in some dramatic improvements. MIT found that campus WiFi (2%
> packet loss) jumped from 1Mbps to 16Mbps. On a fast-moving train (5%
> packet loss), the connection speed jumped from 0.5Mbps to 13.5Mbps."
>=20
> http://www.mit.edu/~medard/papers2011/Modeling%20Network%20Coded%20TCP.pdf=
>=20
> --RB
>=20
