A fluid model for high-end network equipment with QoS policied aggregated traffic

In this paper, we introduce a modeling framework based on the fluid flow approximation, which can be effectively applied to high-end nodes for transport/core networks. Our proposal starts from a detailed analysis and considerations on state-of-the-art network device architectures and QoS traffic descriptors. In more detail, the model explicitly considers QoS policer indexes (e.g., PIR, CIR, CBS, PBS) for aggregated traffic, and tries to represent the node performance in terms of worst-case loss probabilities. Numerical results have been performed both in order to understand and characterize the model accuracy, and in order to represent the behavior of a reference transport node in the presence of mixed and heterogeneous aggregated flows.