Input selective cell tagging and discarding with MMPP traffic model for BISDN/ATM congestion control

In order to discard cells during congestion that are transmitted in violation of the “service contract” agreement between users and ATM network providers, CCITT provides for the cell loss priority (CLP) bit in the ATM cell headers. Implementation of this feature is the responsibility of network providers and its impact depends on the traffic modeling assumptions made during the network design. In the paper, a traffic model based on the modulated Markov Poisson process (MMPP) is used to model the traffic entering a BISDN/ATM network. Cell tagging and discarding is then applied to the excessive rate of the input stream based on a trunk queue threshold at the input to the network. Impact of cell loss as a function of parameters of the model is demonstrated