A Design question

I am trying to simulate a wireless ad hoc network to analyse the
performance of TCP over ad hoc networks. I was planning to simulate a
network that contains 30 nodes. How do I decide as to how many nodes
should be made mobile?.

Thanks,
Aravind

> I am trying to simulate a wireless ad hoc network to analyse the
> performance of TCP over ad hoc networks. I was planning to simulate a
> network that contains 30 nodes. How do I decide as to how many nodes
> should be made mobile?.

Surely deciding how many nodes should be mobile is a function of the
simulation based upon the analysis?!

On 26 Oct 2005 14:10:18 -0700, arvind_c_98@yahoo.com wrote:

>I am trying to simulate a wireless ad hoc network to analyse the
>performance of TCP over ad hoc networks. I was planning to simulate a
>network that contains 30 nodes. How do I decide as to how many nodes
>should be made mobile?.

Is this a trick question? 30. Ad-hoc networks are *ALL* mobiles.
There is no fixed access point in an ad-hoc network. It's all client
to client communications where everyone is equal.

This model is going to be unrealistic as the maximum number of clients
in an 802.11b/g ad-hoc network is 9 clients. Are you really using
802.11g/b or is this a Zigbee or sensornet model?

http://www.microsoft.com/technet/pro...9db0bcafd.mspx

If this is your skool project or homework, I suggest you do your own
research and reading. If you need help on how something works, we'll
try to answer your questions, but not do your homework or project for
you. However, this question implies that you're just getting started.
I would ask the prof or assistants for clues.

Hmmm... RDNS on your posting IP address of 129.110.97.136 shows
University of Texas in Dallas. Yeah, it's a skool.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

I was under the impression that some of the nodes could be stationary.
It wasn't meant to be a trick question. I was hoping someone would
point me to some link which would help me decide about the simulation
models. Thanks for the link.

Aravind

Jeff Liebermann wrote:
> On 26 Oct 2005 14:10:18 -0700, arvind_c_98@yahoo.com wrote:
>
> >I am trying to simulate a wireless ad hoc network to analyse the
> >performance of TCP over ad hoc networks. I was planning to simulate a
> >network that contains 30 nodes. How do I decide as to how many nodes
> >should be made mobile?.
>
> Is this a trick question? 30. Ad-hoc networks are *ALL* mobiles.
> There is no fixed access point in an ad-hoc network. It's all client
> to client communications where everyone is equal.
>
> This model is going to be unrealistic as the maximum number of clients
> in an 802.11b/g ad-hoc network is 9 clients. Are you really using
> 802.11g/b or is this a Zigbee or sensornet model?
>
> http://www.microsoft.com/technet/pro...9db0bcafd.mspx
>
> If this is your skool project or homework, I suggest you do your own
> research and reading. If you need help on how something works, we'll
> try to answer your questions, but not do your homework or project for
> you. However, this question implies that you're just getting started.
> I would ask the prof or assistants for clues.
>
> Hmmm... RDNS on your posting IP address of 129.110.97.136 shows
> University of Texas in Dallas. Yeah, it's a skool.
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060 http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558

On 27 Oct 2005 14:42:27 -0700, arvind_c_98@yahoo.com wrote:

>I was under the impression that some of the nodes could be stationary.
>It wasn't meant to be a trick question. I was hoping someone would
>point me to some link which would help me decide about the simulation
>models. Thanks for the link.

You didn't answer my question(s). Is this an 802.11b/g ad-hoc
network? If so, you're limited to 9 nodes. However, if it's a Zigbee
or MANET network:
http://www.ietf.org/html.charters/manet-charter.html
the number of nodes is much much larger. To the best of my
recollection, Zigbee is assumed to be all mobile with no stationary
nodes, even though some might not move for quite a while.

Some of the nodes may be stationary. However, if you're using
Radio-Mobile:
http://www.cplus.org/rmw/english1.html
for modelling your network coverage (not thruput), you don't really
need to distinguish between base and mobiles. The only real
difference is the equipment, feedline, and antenna definitions.

As for helping you "decide" on a simulation model, it would be helpful
to know what you're simulating so the appropriate overpriced tools can
be be found. From the minimal information you supplied, I can't offer
much help.

--
Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
831.336.2558 voice
http://www.LearnByDestroying.com AE6KS
http://802.11junk.com Skype: JeffLiebermann
jeffl@comix.santa-cruz.ca.us jeffl@cruzio.com

Jeff Liebermann wrote:
> On 27 Oct 2005 14:42:27 -0700, arvind_c_98@yahoo.com wrote:
>
> >I was under the impression that some of the nodes could be stationary.
> >It wasn't meant to be a trick question. I was hoping someone would
> >point me to some link which would help me decide about the simulation
> >models. Thanks for the link.
>
> You didn't answer my question(s). Is this an 802.11b/g ad-hoc
> network? If so, you're limited to 9 nodes. However, if it's a Zigbee
> or MANET network:
> http://www.ietf.org/html.charters/manet-charter.html
> the number of nodes is much much larger. To the best of my
> recollection, Zigbee is assumed to be all mobile with no stationary
> nodes, even though some might not move for quite a while.
>
> Some of the nodes may be stationary. However, if you're using
> Radio-Mobile:
> http://www.cplus.org/rmw/english1.html
> for modelling your network coverage (not thruput), you don't really
> need to distinguish between base and mobiles. The only real
> difference is the equipment, feedline, and antenna definitions.
>
> As for helping you "decide" on a simulation model, it would be helpful
> to know what you're simulating so the appropriate overpriced tools can
> be be found. From the minimal information you supplied, I can't offer
> much help.
>
> --
> Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
> 831.336.2558 voice
> http://www.LearnByDestroying.com AE6KS
> http://802.11junk.com Skype: JeffLiebermann
> jeffl@comix.santa-cruz.ca.us jeffl@cruzio.com

I am using network simulator as the tool to simulate the environment. I
was planning to use a two ray ground propagation model which is
implementd in ns. I am using a IEEE802.11 MAC and an omni direction
antenna model in ns.

Aravind