calculation for max TCP throughput by given RTD ?

[ddiggelen]

Hello,

I have been searching for a while now for a calculation which tells me the time needed to download a certain filesize from a remote server.

I know it depends on TCP windowsize, RTD, packetloss.

But what's the equation to calculate download time ?

Here are the facts:

File size 200 Mb

RTD to server 250 msec

Access-line speed 2 Mbps

TCP window size 65Kb

No packetloss.

How to calculate how long it will takes before file is local ?

Thanks,

Diederik

[fmachoka]

Below are links to help understand TCP/IP and methods used to calculate throughtput.

Understanding TCP IP

http://www.cisco.com/en/US/products/sw/secursw/ps743/products_user_guide_chapter09186a008007f2df.html

Network Performance:

http://www.astro.caltech.edu/~pls/papers/acts-report/node10.html

Traffic Measurement analysis

http://www.soi.wide.ad.jp/class/20020032/materials_for_student/07/kjc-day2.pdf

Using TTCP to test throughput

http://www.cisco.com/warp/public/471/ttcp.html