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oBBR: Optimize Retrmissions of BBR Flows on the Internet

on YouTube 25m
Talkat USENIX ATC '23 · 2023-07-10..07-12· [networking]

speakers

name:Pengqiang Bi
links:none on file
name:Mengbai Xiao
links:none on file
name:Dongxiao Yu
links:none on file
name:Guanghui Zhang
links:none on file

resources

video:https://youtu.be/OE_DltckguI
slides:none on file

summary

Analyzes why Google’s BBR congestion control produces high retransmission rates—linking losses to shallow bottleneck buffers, BBR’s in-flight data cap, and bandwidth drops—and validates these causes with experiments. Presents oBBR, a modification that adaptively scales the in-flight cap and updates bandwidth estimates more promptly to avoid injecting excessive data, and reports Internet experiments showing higher goodput and fewer retransmissions compared to BBRv2 and BBR-S, plus improved streaming QoE.

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