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From: Henning Rogge <hrogge@googlemail.com>
Date: Sun, 8 Nov 2009 09:15:08 +0100
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Subject: Re: [B.A.T.M.A.N.] [Babel-users] [Olsr-users] A peer-reviewed
	assessment of OLSR, BATMAN and Babel
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To: babel-users@lists.alioth.debian.org
Cc: olsr list users mailing <olsr-users@lists.olsr.org>, The Ad-hoc Networking list for a Better Approach To Mobile <b.a.t.m.a.n@lists.open-mesh.net>, jerryw@uow.edu.au, Juliusz Chroboczek <Juliusz.Chroboczek@pps.jussieu.fr>, brett_hagelstein@uow.edu.au, mehrana@uow.edu.au

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Am Sonntag 08 November 2009 02:08:48 schrieb Juliusz Chroboczek:
> > I would have liked to see a comparison with OLSR.org default settings
> > (ETX metric) instead of hopcount metric.
>=20
> Agreed.
>=20
> Note however that this doesn't entirely explain why OLSR collapsed in
> their tests.  If you look at table I, you'll notice that in the case of
> node Babel did choose the shortest hop-count route, and Babel and OLSR
> exhibited similar levels of route flapping; in other words, in this
> particular test ETX and shortest-hop coincide.  However, Figure 2
> indicates that OLSR's throughput was half that of Babel, and in
> Figure 3, OLSR's packet delivery ratio was just 75%.
Good question. Maybe they activated an agressive MPR setting and hit a know=
n=20
bug in the dijkstra algorithm that can create problems with MPR settings (t=
he=20
bug is fixed in the development tree and the current 0.5.6 displays an erro=
r=20
message with the not-working settings).

Henning

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