**** Columbia Network Research Group Seminar ****

Title:    Detecting Shared Points of Congestion via End-to-End Measurement
Speaker:  Prof. Dan Rubenstein
          Columbia University 
When:     Wednesday, October 11, 10 am
Where:    Interschool Lab, CEPSR Building, 7th floor
          Columbia University

Current Internet congestion control protocols operate independently on
a per-flow basis.  Recent work has demonstrated that cooperative
congestion control strategies between flows can improve performance
for a variety of applications, ranging from aggregated TCP
transmissions to multiple-sender multicast applications.  However, in
order for this cooperation to be effective, one must first identify
the flows that are congested at the same set of resources.  In this
talk, I will present techniques based on loss or delay observations at
end-hosts to infer whether or not two flows experiencing congestion
are congested at the same network resources.  I will also show how we
validate these techniques via queueing analysis, simulation, and
experimentation within the Internet.

I will also give a brief overview of some of the inference work that I
am aware of that has been taking place, and what I think are some
interesting inference problems of the future.