Re: [ns] ftp rate & data size

[Debojyoti Dutta <ddutta@ISI.EDU>]

I dont know whether this will answer your question but I will try. Suppose
the network is not congested. Find the most constrained link .... that
should give you the rate. 

If you do FTP over TCP, you need to figure out the TCP throughput. That is
approximately av window size / RTT. Hence the tcp agents would knwo the
rate. Now if you can pass this information to the ftp agent, the ftp agent
will be able to figure out the required rate.

Hope this helps,
Debo


> Hi, ns people:
> 
> I have one question related to ftp rate & data size. Could anyone give me
> the answer?
> 
> If I set a TCP agent and use ftp as the application, how can I know that
> the rate of ftp to send out packets? I means how long for ftp to wait
> until sending next data bytes? and what are the data_sze? Can I change
> these two parameters? Which file, if I need to change them?
> Since I check ns-default.tcl, I can not find any default values for these
> two parameters.
> 
> Any help will be appreciated. Thanks.
> 
> C.L.
> 
> 
> ****************************************************************************
> Chien-Lung Wu						cwu4@eos.ncsu.edu
> Graduate Student of ECE 				(O) 919-513-1894
> at North Carolina State University			(H) 919-233-6724
> ****************************************************************************
> 
> 
>