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Title: Modest BBR: Enabling better fairness for BBR congestion control
Authors: Zhang, Yuxiang
Cui, Lin
Tso, Fung Po
Keywords: Congestion control
Retransmission
Interprotocol fairness
Issue Date: 2018
Publisher: © IEEE
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.
Abstract: 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.
Description: © 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.
Sponsor: 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.
Version: Accepted for publication
DOI: 10.1109/ISCC.2018.8538521
URI: https://dspace.lboro.ac.uk/2134/36911
Publisher Link: https://doi.org/10.1109/ISCC.2018.8538521
ISBN: 9781538669501
ISSN: 1530-1346
Appears in Collections:Conference Papers and Presentations (Computer Science)

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