Performance analysis of growable packet (ATM) switch under nonuniform traffic

This paper reports the results of the performance analysis of a growable switch architecture based on the generalized knockout principle under a nonuniform traffic pattern. It is observed that with output traffic imbalance, there is degradation in the overall cell loss probability factor of the switch. We also find the variation in cell loss probability over the different output modules. We further show that by optimizing the input trunk size going to different output modules, it is possible to keep the overall cell loss probability below a given target and reduce the variability of cell loss probability over the different output modules. The resizing or reconfigurability required in the interconnection structure is then shown to be a function of the variability of the projected traffic going to an output module