RE: [manet] AODV Question

Agreed.  A branched chain configuration would be difficult to support with only a BYTE. My point is that although most everyone involved in development and testing of this protocol have envisioned a 'cluster of connected nodes' arrangement, the reality is the sum total of all possible topolgies in a wireless network of this type is potentially limitless.  Limited in effect by only the range of the radios in the network.  How are we to know how some future person or organization will use this protocol?  Will they need the extra BYTE?  Should we place artificial limits on the protocol by purposefully limiting the hop count, address range, etc.?

One solution is the "extensions" field in the latest draft of AODV could potentially provide a means to expand upon the protocol in the future if neccessary.  
http://moment.cs.ucsb.edu/pub/draft-perkins-manet-aodvbis-00.txt

-----Original Message-----
From: Jitesh Shah [mailto:jiteshshahin@yahoo.com]
Sent: Thursday, November 13, 2003 7:36 AM
To: manet@ulfius.com; manet@ietf.org
Subject: RE: [manet] AODV Question

Hi,

It depends on how you see the network. If you are
refering to a network which has a CHAIN topology then
the byte used for RREP and RREQ might be way
insignificant. But when you refer to a well connected
network then the byte seems sufficient.

Rgds
Jitesh

 --- Robert Cain <manet@ulfius.com> wrote: >
Connectivity is the number of other nodes each node
> can reach with 1 hop.
> Therefore a connectivity of 10 means there is 10
> nodes that a can reach
> directly. Obviously in an actual network this would
> vary from node to node.
> 
> 
> Rob Cain :-)
> 
> 
> >What does the connectivity parameter specify?  Is
> it saying in 100,000
> nodes only 10 nodes would be connected?
> >
> >-----Original Message-----
> >From: Robert Cain [mailto:tgm@ulfius.com]
> >Sent: Wednesday, November 12, 2003 11:13 AM
> >To: DANIEL BYRNE
> >Subject: Re: [manet] AODV Question
> >
> >
> >1 byte seems OK to me.
> >
> >With some simple analysis assuming a circular
> homogeneous network of node
> >count K and a reasonable connectivity C then the
> radius of the network in
> >hops can be derived to be the square root of K/C.
> Which for a network size
> >of 100,000 and a connectivity of 10 gives a hop
> count radius of 100.
> Seeing
> >as a network of size 100,000 will be probably at
> practical limits of size
> >due to performance degradation then I think 1 byte
> may well be enough.
> >
> >hope that helps :-)
> >
> >Rob Cain
> >
> >>if the 
> >>
> >>"AODV routing protocol is designed for mobile ad
> hoc networks
> >>   with populations of tens to thousands of mobile
> nodes"
> >>
> >>why is the HopCount limited to only a BYTE?  This
> effectively limits the
> >number of hops to 255.  Why not expand the hop
> count to two bytes into the
> >reseved region of the RREQ packet.  Something
> similar could be done with
> >the RREP packet as well.
> >>
> >>
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> >>
> >
> 
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