Subject: Re: [manet] manet Digest, Vol 60, Issue 19

From: mustafa Bani- Khalaf <[email-masked]>
Date: Tue, 7 Apr 2009 12:16:40 -0700 (PDT)

--- On Tue, 4/7/09, [email-masked] <[email-masked]> wrote:
From: [email-masked] <[email-masked]>
Subject: manet Digest, Vol 60, Issue 19
To: [email-masked]
Date: Tuesday, April 7, 2009, 12:00 PM

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Today's Topics:

   1. OLSRv2 and forwarding based on MPR (Dearlove, Christopher (UK))

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Message: 1
Date: Tue, 7 Apr 2009 15:31:37 +0100
From: "Dearlove, Christopher (UK)"
<[email-masked]>
Subject: [manet] OLSRv2 and forwarding based on MPR
To: "manet" <[email-masked]>
Message-ID:
	<[email-masked]>
Content-Type: text/plain;	charset="us-ascii"

(This is not properly threaded, as it seems this email system
doesn't like Richard as well as Charlie. I was actually
checking the archive for any postings by Charlie.)

Richard Ogier
> The race condition that Philippe described can also occur with
> a single interface under certain conditions. For example,
> suppose a MAC protocol is used that decides to "multicast" 
> a packet by unicasting it to each neighbor, one at a time.

This is also a well-known result. But I do not view it as a
real issue here, as I believe the cases of interest will use
real wireless broadcast. The general multiple unicasting
solution does not scale well (though there are approaches
- I've implemented at least one) that can win back some of
your loss.

> (In some cases, this might be more efficient if there are only 2 or 3
> neighbors.)

And you know who they are. As one of the points of NHDP is
to find your neighbours, which rules out this approach.

> So it might be worthwhile to modify the MPR selection or the
> MPR flooding mechanism in order to allow the above situation.

In this case, I don't think so. In others, this can be so.

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End of manet Digest, Vol 60, Issue 19
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