Analysis of Multiple Flows using Different High Speed TCP protocols on a General Network

TL;DR

This paper develops analytical tools to evaluate the performance of multiple high-speed TCP flows, such as CUBIC and Compound TCP, in multi-hop networks, providing accurate throughput estimations validated by simulations.

Contribution

It introduces novel analytical methods, including queue approximation and optimization, for steady-state throughput analysis of various TCP protocols in complex networks.

Findings

Analytical models closely match ns2 simulation results.

Effective techniques for throughput estimation in multi-hop networks.

Insights into TCP flow performance under different loss conditions.

Abstract

We develop analytical tools for performance analysis of multiple TCP flows (which could be using TCP CUBIC, TCP Compound, TCP New Reno) passing through a multi-hop network. We first compute average window size for a single TCP connection (using CUBIC or Compound TCP) under random losses. We then consider two techniques to compute steady state throughput for different TCP flows in a multi-hop network. In the first technique, we approximate the queues as M/G/1 queues. In the second technique, we use an optimization program whose solution approximates the steady state throughput of the different flows. Our results match well with ns2 simulations.