Abstract—Router buffer size has been playing an important role in packet based networks. In particular, it has been argued that high speed optical networks of the order of 10Gbps demand for large buffer size according to rule of thumb. Because of inherent limitations (i.e., execution time and memory overhead) of a packet based simulator for high speed optical networks, there are few simulation studies available. Also, high speed network experimentation facilities (e.g., testbeds and real networks) are still scarce resources and therefore, a complete experimental study on this topic is not easy to perform. In this paper, a fluid-based model is introduced to accommodate the effect of packet loss synchronization on sizing intermediate buffers over 10Gbps optical networks. Our simulation approach is simple and easy to implement and above all provides some insight of the relation between synchronization level, buffer size and performance of different TCPs. Simulation results are presented to show the effect of loss synchronization/desynchronization on link utilization of popular transport protocols using different buffer sizes on 10Gbps optical networks. The proposed fluid-based method will promote principal understanding of the future high speed networks and accelerate protocol development process. I
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