A User Relief Approach to Congestion Control in Atm Networks

In this paper a new, insightful description of the object functions of a Traac Regulator (TR)-implementing a model traac behavior (delivered to the network) and a (user) relief function-is introduced. By identifying the relief function associated with the Leaky Bucket (LB), an explanation for the inef-ciency of this widely studied TR is presented. The new class of ? relief LB TRs is then developed by focusing on the implementation of more exible and eecient relief mechanisms. The improved effectiveness of the proposed class is established through a comprehensive comparison with the standard LB. The results from this study, as well as the slotted nature of the ATM environment, have motivated the introduction and study of the ? relief TR implementing a near-periodic spacer. The induced cell loss probabilities have been derived through the analysis of a nite capacity queueing system with service opportunities determined in terms of a periodic pattern consisted of C + 1 subframes.