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From: Marek Lindner <lindner_marek@yahoo.de>
Date: Fri, 14 Aug 2009 00:00:29 +0800
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Subject: Re: [B.A.T.M.A.N.] batman goes looping...
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To: The list for a Better Approach To Mobile Ad-hoc Networking <b.a.t.m.a.n@lists.open-mesh.net>

On Thursday 13 August 2009 23:07:06 Yang Su wrote:
> Maybe I miss some thing here. What do you think would prevent A from
> choosing via the long route (via B) ?

The starting point (still using your example):
* A points to E as it never learned about the long path.
* B points to C because it learned about the long path but does not 
rebroadcast the packets from C because they are slower than the 
packets via A.
* C uses the longer path.

Your idea: Use the echo cancellation's answer to retrieve more information, 
especially when the TQ which is coming back is worse than my own I update my 
routing information.

The situation now:
* A still points to E because the echos coming from B do not contain TQ values 
that are worse than its own.
* B will probably never route via A because the TQ values are much worse.
* C is not affected.

Did I overlook something ?

Regards,
Marek