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Modest BBR: Enabling better fairness for BBR congestion control

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conference contribution
posted on 18.02.2019, 11:11 authored by Yuxiang Zhang, Lin Cui, Fung Po TsoFung Po Tso
As a vital component of TCP, congestion control defines TCP's performance characteristics. Hence, it is important for congestion control to provide high link utilization and low queuing delay. Recent BBR tries to estimate available bottleneck capacity to achieve this goal. However, its aggressiveness characteristics generate a massive amount of packet retransmission which harms loss-based congestion control protocol such as Cubic. In this paper, we first dive into this issue and reveal that the aggressiveness of BBR can degrade the performance of Cubic, as well as the overall Internet transmission. Then we present Modest BBR, a simple yet effective solution based on BBR, by responding to retransmission less aggressively. Through extensive testbed experiments and Mininet simulation, we show Modest BBR can preserve high throughput and short convergence time while improve the overall performance when coexisting with Cubic. For example, Modest BBR gets similar throughput compared to BBR, while it improves 7.1% of the overall throughput and achieves better fairness to loss-based schemes.

Funding

This work has been partially supported in part by Chinese National Research Fund (NSFC) No. 61772235 and 61402200; the Fundamental Research Funds for the Central Universities (21617409); the UK Engineering and Physical Sciences Research Council (EPSRC) grants EP/P004407/2 and EP/P004024/1.

History

School

  • Science

Department

  • Computer Science

Published in

IEEE Symposium on Computers and Communications Proceedings - IEEE Symposium on Computers and Communications

Volume

2018-June

Pages

646 - 651

Citation

ZHANG, Y., CUI, L. and TSO, F.P., 2018. Modest BBR: Enabling better fairness for BBR congestion control. Presented at the 2018 IEEE Symposium on Computers and Communications (ISCC), Natal, Brazil, 25-28 June 2018, pp.646-651.

Publisher

© IEEE

Version

AM (Accepted Manuscript)

Acceptance date

28/04/2018

Publication date

2018

Notes

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

ISBN

9781538669501

ISSN

1530-1346

Language

en

Location

Natal, Brazil