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21074: RE: [MUD-Dev] UDP Revisited

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From: "Jeremy Gaffney" <jgaffney@ncaustin.com>
Newsgroups: nu.kanga.list.mud-dev
Date: Mon, 15 Oct 2001 10:40:23 -0500
Organization: Kanga.Nu
> -----Original Message-----
> From: Daniel.Harman@barclayscapital.com

> The other thing I'm doing is proposed in an article on gamasutra
> by the developers of X-Wing vs Tie Fighter (The Internet Sucks:
> Or, What I Learned Coding X-Wing vs. TIE Fighter, Peter Lincroft,
> http://www.gamasutra.com/features/19990903/lincroft_01.htm
> ). Their solution was to append the previous packets payload to
> each packet, I won't really be able to measure how useful this is
> until I do some live tests, but seeing as UDP packet loss is meant
> to be around 10% it may help prevent resends. The only issue is
> that packets tend to be dropped in batches, so it may not add that
> much in real terms.

A trick I've used, is when having a prioritization system in place
(often used as part of congestion control) to re-send past
non-NACKed or ACKed yet packets as a lowest priority action.  This
effectively erases most dropped single packets iff bandwidth allows.

-jg

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