Subject: RE: [manet] data rate Vs Channel BW

From: "Richard Gwee" <[email-masked]>
Date: Fri, 23 Dec 2005 10:43:13 +0800

Hi Cidambaram,

It is interesting that you have mentioned layer 2 shared use
functionality of a radio net. Can you enlighten me on this statement as
I am not particularly strong in this area. I will like to learn more
from you.

Hi Gomathy,

In my opinion, anyone please correct me if I am wrong, normally
simulation work is carried out at low data rates to have a better
perspective of network performance under normal traffic condition.
Performing simulation of congested networks seem to provide little value
as a lot of theoretical models will not be accurate under congestion. I
am also sure that lower packet rates will be easier for packet analysis
to be performed.

Thanks and regards
Richard  

-----Original Message-----
From: [email-masked] [mailto:[email-masked]] On Behalf
Of Rex Buddenberg
Sent: Friday, December 23, 2005 3:37 AM
To: cidambaram ramanathan
Cc: [email-masked]
Subject: Re: [manet] data rate Vs Channel BW

Gomathy,

In the papers you went through, do any of them:
	- describe experiments that use the layer 2 MAC?  Or are they
simply
using something like WiFi in a point-to-point configuration?
	- use layer 2 multicast (e.g. ethernet addressing)?  

If you ignore the layer 2 shared use functionality of a radio net and
only model the layer 3 MANET characteristics, the numbers you're
describing are about par for the course.  If you ignore layer 2
multicast, then the bandwidth efficiency that a multi-point radio
network can offer are obviated.  

Help?

On Thu, 2005-12-22 at 01:35 +0000, cidambaram ramanathan wrote:
> Dear All,
>  As I have gone through many papers in MANET, All authors describe
that dta rate
> varies from 4 - 10 packets per sec for about 30 or 50 node scenario.
and the channel
> BW is kept as 2 Mbps.
> Considering, packets size to fixed may be at 512 bytes , The traffic
rate may be
> only in some 100 kbps.This seems to be very low for channel bw in
Mbps.
> Why is dta rate kept very low in these simulations?
> Can anyone help me in this regard?
> Thanks in advance.
> Gomathy
> 
> 
> Gomathy
> 
> 
> 		
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b

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