Congestion control: detection
The problem of path loss rate estimation with TCP protocol has been actively studied by the research community. Several schemes has been proposed in order to accurately estimate the loss rate of a given path. These proposals are used for monitoring or metrology purposed.
However, estimating and identifying the TCP congestion event is currently not addressed.
We define as congestion event: a set of losses occurring on a TCP window which involves a TCP congestion adaptation (i.e. a decrease of the current sending window) [RFC3448]
While nowadays rate-based protocols received a particular attention from the research community, it seems important to better identify these congestion events in order to give an accurate reference to these protocols which aims at behaving in a fair manner with TCP. In this study, we propose a method able to identify a congestion event at the border of an autonomous system. This method is implemented in TCED software:
Appropriate TCP congestion response
It is known TCP outperforms in the LFN environment. Several solutions tackle this issue. We aims to define a solution without any measurment.
RTT and reorder in network
What is the magnitude of theses delays in the Internet ? This action aims to response to this question. With a simple echo request, we try to estimate the density function of theses delays.