Performance modeling of elastic traffic in overload

The simple preliminary models for an overloaded link accounting for user impatience and reattempt behavior were discussed under Markovian assumptions. It was found that the degree of congestion on a network link was not easy to detect by observing the packet arrival process. Impatience was manifested by the interruption of a session and may not be detectable as an abnormal event. Impatience interrupts large flows after a small fraction of their data had transferred. Aborted flows are not generally abandoned at first attempt as users will frequently make a repeat attempt. To perform admission control an alternative overloaded link was allowed to stabilize through impatience.