[Commotion-dev] Throughput advantage to 802.11s support

[Ben West]

I agree with Aaron than for uses beyond meshes limited to a single channel,
max 32 or max 50 nodes is still the same arbitrarily low limit.

I am curious, tho, which approach would be more effective in getting this
limitation (and its implementations) amended: A) don't use 802.11s at all,
or B) use 802.11s as-is and push for more adoption of 802.11s among your
peers nevertheless, so that the number of people potentially demanding this
amendment increases.

As for meshing across multiple channels (or media, for that matter), I
started a thread<https://lists.olsr.org/pipermail/olsr-users/2013-February/005434.html>on
the olsr-users list asking about good approaches to building efficient
bridges for hybrid mesh topologies.  The
trelay<https://dev.openwrt.org/browser/trunk/package/trelay?order=name>package
recently added to OpenWRT looks especially useful for this, and I
think that tool was also mentioned in recent Battlemesh announcements.

On Fri, Feb 8, 2013 at 6:15 PM, Jeremy Lakeman <Jeremy.Lakeman at gmail.com>wrote:

> On Sat, Feb 9, 2013 at 4:17 AM, L. Aaron Kaplan <aaron at lo-res.org> wrote:
> > That's partly correct today. Initially the node_id field was 5 bit long
> -> hence allowed for a maximum of 32 nodes.
> > I was told cozybit changed that in the mean time (are they then standard
> conforming?)
> >
> > What I was told behind the scenes: it was not a telco lobbyist, but
> actually the companies involved in standardising 802.11s themselves, which
> did not want it to be much of a success since all of them already had their
> proprietary protocol implementation :(
> > I have no idea if this was a mere opinion of this IEEE forum participant
> or if it really reflected the situation at the IEEE at that time. However,
> it would explain brain dead ideas like a "32 bits are enough".
> >
> > Do you remember the 802.11s implementation at OLPC? That was
> terrible...they had to revert to fixed APs.
> >
> >>  However, Antonio of the Robin Mesh project, who has already
> incorporated 802.11s into this new Meshroot firmware stack, mentioned how
> this limitation is actually 50 nodes as implemented (??),
> >
> > ... in any case... is 50 nodes much better than 32 nodes?
> > Not really. Come one :)
> >
> > I'd like to see an 802.11s network with > 1000 nodes!
> > (Probably will never exist since it is one single collision domain).
> > To sum it up: I am very doubtful of its scalability.
> >
> > For small, local layer 2 meshes it might be OK after it got lots of
> massaging from cozybit - don't know.
> > We could test it at the WBM in Denmark.
> > Try it out and tell us about it :)
> >
> > a.
>
> Besides I'd like to see a mesh network that works on more than one
> channel, with links that use different physical layers.
>



-- 
Ben West
http://gowasabi.net
ben at gowasabi.net
314-246-9434
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