RE: [manet] AODV Question

["John Mullen" <jomullen@nmsu.edu>]

Hi Charlie,

Well, I can see one application of MANET technology in a situation in
which the nodes do not move.  Consider the Dine' (Navajo) nation which
covers thousands of square miles in the southwestern US.  Connecting the
many isolated communities with wire or fiber does not seem to be an
option.  Furthermore, the Dine' would prefer not to use the ideal places
for antennas because of religious and other reasons.  Every time you dig
a hole on the reservation, you need an archeologist.  Other American
Indian jurisdictions are checkerboarded.  That is, there are parcels of
fee simple land owned by non-members of the Tribe interspersed
throughout the area.  In those cases, right of way is a big problem.

It is not just that putting up telephone poles is a problem, but also
that a common electrical supply is often not available.  That is, any
repeaters would have to be self-powered.

Now, imagine a network of nodes that are powered by batteries, which in
turn, are recharged by solar energy.  Also, assume the net is dense
enough that many nodes can go to standby while the others take the load.
However, as the evening wears on, the active nodes, one by one, will
have to shut down due to low power.  Others could, at any time, have to
shut down due to malfunctions (we a talking of many nodes in a very
hostile environment).  As each does so, one or more inactive nodes wakes
up to take the load.

Such a net would have no mobile nodes, but would require frequent
automatic reconfiguration.  It wouldn't be entirely a MANET, since each
node could know where every other node was, but would require a degree
of automatic reconfiguration that ordinary protocols would not support
due to the frequent changes in the pattern of available nodes.  I would
think that at least part of a MANET protocol would be helpful.  Also, if
such a protocol were to be used, mobile nodes could be more easily
accommodated as they move throughout the communications area.

Just a thought.

John Mullen

-----Original Message-----
From: manet-admin@ietf.org [mailto:manet-admin@ietf.org] On Behalf Of
Charles E. Perkins
Sent: Monday, November 17, 2003 8:27 AM
To: DANIEL BYRNE
Cc: 'Erik Nordström'; manet@ulfius.com; manet@ietf.org
Subject: Re: [manet] AODV Question



Hello folks,

One or two comments below:

DANIEL BYRNE wrote:

> Yes we did, but everyone here is now saying that AODV doesn't work 
> well over 50 or more hops.

I can believe that the performance would suffer
greatly, depending on the mobility of the intermediate
nodes.  If the nodes didn't move, then I wonder what
would go wrong?

Regarding the idea about replacing land lines,
I guess that any routing protocol would work,
even manual configuration.  To overcome the 
hop limit, you could do encapsulations.

It doesn't seem to be a close match for the
technology provided for use with mobile ad
hoc networks since:
1) the nodes aren't mobile, and
2) the network isn't ad hoc.

Regards,
Charlie P.

_______________________________________________
manet mailing list
manet@ietf.org
https://www1.ietf.org/mailman/listinfo/manet


_______________________________________________
manet mailing list
manet@ietf.org
https://www1.ietf.org/mailman/listinfo/manet