Data Performance of Modified Pushout+ppd Mechanism with Elastic and Deterministic Traffic Sources with Priorities

Plain ATM (Asynchronous Transfer Mode) has poor performance in case of Data transmission. In order to improve its performance many Buffer Management Mechanisms have been proposed, e.g. push-out. The aim of this paper is to propose improved approach to push-out based on the analysis of various packet discard policies, and create a simulation model in GPSS (General Purpose Simulation System) in order to evaluate its data performance. It provides a stepbystep description of the design of a simulation model, from concept to GPSS algorithm. Some results of the data performance of UDP (User Datagramme Protocol) running over ATM are presented.