[Tmrg] sending rate of a TCP flow

[krasnoj at gmx.at (Stefan Hirschmann)]

Hi!

aydin at mail.eecis.udel.edu wrote:
 > hypothesis: When N long-lived TCP flows (with the same RTT and MSS 
values)
 > share a bottleneck link in a dumbbell  topology (all the edge links have
 > the same delay and bandwidth), I expect each TCP flow to have the same
 > sending rate -- Assume no other cross traffic in the network and 
drop-tail
 > queues.

There are so called phase effects. Because of them, this assumption is 
wrong.


 > Do you know any references (simulation-, emulation-, or real
 > experiment-based studies) that prove this hypothesis or the opposite?

When I download two large files from rapidshare.com over my own internet 
connection -  ADSL link (2Mbps) - sometimes one flow gets 160 Kbps and 
the other one around 50 Kbps. This is my own experience.

My ns-2 simulations showed the same effects.

Stefan