RE: [manet] Question regarding Mobility

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

Hi Peter,

In general, the distribution of nodes while in motion differs from that
when they are stationary, but in the particular case you describe, I am
not sure.  

The Poisson distribution essentially describes a uniform distribution
over an unbounded region.  If the region is bounded, and if nodes pick a
location, then move to it, the distribution of nodes in motion will have
a more central distribution because when near a boundary, it is more
likely to pick a new location that is towards the interior than further
out.  However, without a boundary, this reasoning does not apply and it
might be that the distribution does not change.

So if the region is bounded, and if destinations are chosen according to
the original placement distribution, the answer is "yes," but if the
region is unbounded or if some other destination rule is used, I am not
sure.

John Mullen

-----Original Message-----
From: manet-admin@ietf.org [mailto:manet-admin@ietf.org] On Behalf Of
Peter Pham
Sent: Wednesday, November 19, 2003 6:04 PM
To: MANET
Subject: [manet] Question regarding Mobility


Hi all
I am interested in modelling ad hoc networks. In the stationary scenario

(nodes do not move), I can assume that the mobile nodes are distributed 
randomly according to Poisson distribution (many assumed so). However, 
is this assumption still valid under the mobility ?
Can anyone give me some advice ?

Peter Pham



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