RE: [manet] Hidden- & exposed terminal problem in MANET

["Martin Layley" <mlayley@seri.co.uk>]

But the MASER has a real beam width.  If it doesn't, then you can reduce the problem to a single dimension.  If there are several nodes along a line, as shown in the original e-mail question & answer, then the hidden node problem still exists.  If you expand the problem to a 2D plane, then the probability, even with a physical beam width of a degree or two, is greatly reduced and reduces still further when you expand to a 3D volume.  (note that I'm still considering free space.  Obstructions can cause entertainment).

The hidden node problem was demonstrated with a simple chain.  It won't go away with more complex arrangements.  The chain can happen in real life too.

		Martin
		SERI

-----Original Message-----
From: Phillip Neumiller [mailto:PNeumiller@MeshNetworks.com]
Sent: 24 September 2002 16:09
To: Martin Layley; Phillip Neumiller
Subject: RE: [manet] Hiden- & exposed terminal problem in MANET


Lets say I have a maser tracking you line of site.  Then there
is no self interference at all right?

-----Original Message-----
From: Martin Layley [mailto:mlayley@seri.co.uk]
Sent: Tuesday, September 24, 2002 11:05 AM
To: Phillip Neumiller
Subject: RE: [manet] Hiden- & exposed terminal problem in MANET


Wrong.  The probability is merely reduced.

		Martin

-----Original Message-----
From: Phillip Neumiller [mailto:PNeumiller@MeshNetworks.com]
Sent: 24 September 2002 16:02
To: Martin Layley
Subject: RE: [manet] Hiden- & exposed terminal problem in MANET


There is probably some materials science problems in there, but
if these platonic antennas could exist, then the self-interference
problems of exposed and hidden nodes would not longer exist right?

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