On Scalable Modeling of TCP Congestion Control Mechanism for Large-Scale IP Networks

In this paper, we propose an analytic approach of modeling a closed-loop network with multiple feedback loops using fluid-flow approximation. Specifically, we model building blocks of a network (i.e., the congestion control mechanism of TCP, propagation delay of a transmission link, and the buffer of a router) as independent continuous-time systems. By interconnecting these systems, we obtain the model for a complex closed-loop network. We improve the accuracy of analytic models for TCP congestion control and RED router by extending existing fluid-flow models. First, we obtain a block diagram for each continuous-time system using a standard CAD tool widely used in control engineering. Second, we evaluate the performance of a closed-loop network with multiple feedback loops by connecting these block diagrams. We also validate the effectiveness of our analytic approach by comparing our analytic results with simulation results. Unlike other fluid-based modeling approaches, our anal...

• Type: Conference
• Year: 2005
• Where: SAINT
• Authors: Hiroyuki Ohsaki, Juñya Ujiie, Makoto Imase
• Keywords: Analytic Approach, Closed-loop Network, Continuous-time Systems, Internet Technology, SAINT 2005