da-bbr

Delay-Aware BBR Congestion Control Algorithm

Introduction

Delay-Aware BBR Congestion Control Algorithm (DA-BBR) is a implementation of aSTEAM Project https://asteam.korea.ac.kr. Google proposed the Bottleneck Bandwidth and Round-trip time (BBR) congestion control algorithm to achieve high bandwidth and low latency for Internet traffic. BBR can reduce packet loss and minimize end-to-end packet delay, which has attracted the attention of many researchers. However, there is a serious fairness issue between TCP BBR flows with different RTTs. In this work, we propose a solution to mitigate the RTT fairness issue between BBR flows.

Requirements and Dependencies

• Please access include/net/inet_connection_socket.h and set ICSK_CA_PRIV_SIZE to 256 * sizeof(u64).
• Above development was based on the Linux version of 4.14.64+.

Instructions

• How to Run
  1. Just replace the existing tcp_bbr.c in /usr/src/.../net/ipv4/.
  2. make && make install for the directory.
  3. reboot the system.
  4. Change the default Congestion Algorithm to bbr