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ctcp-with-bbr's Introduction

cTCP with BBR

This repo is a part of the lab in computer networking class taught by prof. ramesh govindan at USC.

Overview

I delved into the intricacies of transport protocol design and implementation, focusing on a cTCP(stripped-down version of TCP) model with Google's BBR (Bottleneck Bandwidth and Round-trip propagation time) congestion control algorithm. This repo aims to provide hands-on experience in implementing and testing cTCP that integrates advanced congestion control mechanisms to optimize network performance.

Objectives

  • Implement cTCP that operates at the user level, outside of the OS kernel.
  • Integrate BBR congestion control to enhance the efficiency of data transmission under varying network conditions(drop, corrupt, delay, duplicate).
  • Test the implementation in a simulated network environment to evaluate performance and ensure compatibility with standard TCP protocols.

Implementation

cTCP

  • Implement stop-and-wait and sliding window mechanisms to manage data flow and ensure reliable data transmission.
  • Handle cTCP segments to send and receive them.

BBR Congestion Control

  • Incorporate BBR algorithm to dynamically adjust data sending rates based on estimated network bandwidth and latency.
  • Test BBR's effectiveness in various network conditions, focusing on its ability to maintain high throughput and low latency.

For details, please navigate to Report_1.pdf, Report_2.pdf, ctcp.c, ctcp_bbr.c, etc.

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