Aggregated TCP Traffic with Congestion Losses

Description:
A simulation model designed to compare the evolution of TCP traffic rate scaling behavior with increasing congestion losses, at the two extreme session-layer traffic scenarios: one with small, constant-size file transfers, another with heavy-tailed, Pareto file size distributions.

The network model suited to studies of aggregate TCP traffic satifies the following requirements:

  1. each TCP connection in the aggregate is subject to losses independently of others, at some other network location, and the losses are caused by a different set of competing TCP connections rather than artificially imposed from the outside;
  2. packet loss rate can be controlled by changing the number of competing TCP connections;
Documentation:
Michael Liljenstam and Andy T. Ogielski, Crossover Scaling Effects in Aggregated TCP Traffic with Congestion Losses, May 2002, [  .ps.gz 169k  ] or [  .ps 729k  ]

SSFNet Configuration Files:
DML configuration files for the cases of three file size distributions: fixed-size, Pareto with alpha=1.8 and Pareto with alpha=1.2, both for the non-congested and heavily congested scenarios. See the paper for description.
Download all files:
src.tar.gz

Topology: