Journal Homepage: www.ijcst.org

Abstract—In this paper, we propose a flow-level simulator called FSIM (Fluid-based SIMulator) for performance evaluation of large-scale networks, and verify its effectiveness using our FSIM implementation. The notable feature of our flow-level sim-ulator FSIM is fast simulation execution compared with a con-ventional flow-level simulator. For accelerating simulation execu-tion speed, our flow-level simulator FSIM adopts an adaptive numerical computation algorithm for ordinary differential equa-tions. Another features of our flow-level simulator FSIM are ac-curacy and compatibility with an existing network performance analysis tool. For improving simulation accuracy, our flow-level simulator FSIM utilizes accurate fluid-flow models. In this paper, through extensive experiments using our FSIM implementation, we evaluate the effectiveness of our flow-level simulator FSIM in terms of simulation speed, accuracy and memory consumption. Consequently, we show that our flow-level simulator FSIM out-performs a conventional flow-level simulator; i.e., it realizes ap-proximately 200%-2,000 % faster simulation with higher accuracy and less memory consumption than a conventional flow-level simulator