Simulations of TCP congestion control mechanism model with large buffer size

The Transmission Control Protocol (TCP) is the main protocol of the transport layer in today's Internet. Many works have studied the performance of TCP and researchers are trying to analytically characterize the throughput of TCP's congestion control mechanism. We summarize previous works and present the simulation result with large buffer size and give a qualitative analysis of the result. Our conclusion is that the RTT is not increased by a linear amount, but by a quadric amount when the buffer size of the bottleneck is large enough. Our goal is to estimate the average queue length of the buffer size and develop a TCP model based on RTT and the average queue length.