[OLSR-users] Re: a little feedback and questions

Bruno Randolf (spam-protected)
Mon Jul 12 16:30:06 CEST 2004

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i just found this discussion about mesh scalability: 

and then there is a nice presentatiopn from david reed, but it`s more about 
open spectrum:
How wireless networks scale: the illusion of spectrum scarcity 


On Monday 12 July 2004 11:04, (spam-protected) wrote:
> Hi Aaron,
> It's cool you're checking out OLSR for your rooftop project!
> My comments are inline.
> > what happens is that regularly whenever la17 sends out some bigger
> > requests or receives something bigger than the 64 byte ping packet, the
> > connection drops down to a few kB/s. With normal ping packets we would
> > have theoretially a thruput of 2-11mbit (signal quality is very good!
> > channel is set to 2 mbit).
> >
> > any ideas where this could come from? any knobs where we could turn at
> > olsr or do you think we have a layer 2 problem?
> I really don't know... I've seen some strange errors when using orinoco
> gold cards - but nothing like this. As for the WRT other people on this
> list have done a great deal more work with this hardware. Anybody got any
> ideas?
> What if you set up static routes. Is the problem is still there?
> > There seem to be two opinions here: 1) meshnetworking bandwidth will
> > scale with O(1/n) where n is the number of nodes and 2) meshnetworking
> > bandwidth will scale better than that :)
> > question: are there any mathematical models for olsr? would somebody be
> > interested in discussing models?
> When talking about scalability concerning bandwidth I think the limitations
> of OLSR could be shown through simulations. I have not done any work on
> simulations, but there probably are a lot of papers out there  on the
> subject(I'm on vacation writing this on a sloooow dial-up connected
> box, so I didn't bother downloading any of the PDFs that a google search
> showed ;-) )
> If you are interested in a more theoretical discussion I suggest posting
> the question on the MANET mailing-list.
> Sorry if these answers are a bit short and unprecise - but as mentioned,
> I'm on a vacation here...gotta go :-)
> regards,
> Andreas
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