Conclusions
A wide variety of patterns can be seen in the timing measurements taken from ATM networks.
- different combinations of correlation functions and delay measurements show different kinds of artifact;
- the measurements can be explained in terms of the structure of the network under test;
- with experience, the patterns can be used to predict the types of congestion mechanism in effect;
- however, the analysis still requires a considerable amount of insight, and a little luck, to draw conclusions about the cause of congestion.