BBR Congestion Control

Metadata

Publisher: IETF
Doc Type: Standard
Abstract: This document specifies the BBR congestion control algorithm. BBR uses recent measurements of a transport connection's delivery rate and round-trip time to build an explicit model that includes both the maximum recent bandwidth available to that connection, and its minimum recent round-trip delay. BBR then uses this model to control both how fast it sends data and the maximum amount of data it allows in flight in the network at any time. Relative to loss-based congestion control algorithms such as Reno or CUBIC , BBR offers substantially higher throughput for bottlenecks with shallow buffers or random losses, and substantially lower queueing delays for bottlenecks with deep buffers (avoiding "bufferbloat"). This algorithm can be implemented in any transport protocol that supports packet-delivery acknowledgment (thus far, open source implementations are available for TCP and QUIC ).
Publication Date: 2017-07-03
Status Note: Internet-Draft
Link: https://datatracker.ietf.org/doc/html/draft-cardwell-iccrg-bbr-congestion-control-00/
Author(s): Neal Cardwell
Yuchung Cheng
Soheil Hassas Yeganeh
Van Jacobson
Keyword(s): Congestion Control, TCP, QUIC

Normative Reference(s)

IETF RFC 793 [Superseded*]
IETF RFC 2018 [Active*]
IETF RFC 2119 [Active*]
IETF RFC 5226 [Superseded*]
IETF RFC 5681 [Active*]
IETF RFC 6298 [Active*]
IETF RFC 7323 [Active*]
IETF RFC 7942 [Active*]

Bibliographic Reference(s)

IETF.draft-cheng-iccrg-delivery-rate-estimation-00 — Delivery Rate Estimation EXTERNAL
IETF.draft-ietf-quic-transport-00 — QUIC: A UDP-Based Multiplexed and Secure Transport EXTERNAL
IETF.draft-ietf-tcpm-cubic-04 — CUBIC for Fast Long-Distance Networks EXTERNAL
TCP ACK suppression EXTERNAL
BBR: Congestion-Based Congestion Control EXTERNAL
TSO, fair queuing, pacing: three's a charm EXTERNAL
TCP-NV: An Update to TCP-Vegas EXTERNAL
BBR: Congestion-Based Congestion Control EXTERNAL
CUBIC: A New TCP-Friendly High-Speed TCP Variant EXTERNAL
Congestion Avoidance and Control EXTERNAL
Power and deterministic rules of thumb for probabilistic problems in computer communications EXTERNAL
An Invariant Property of Computer Network Power EXTERNAL
TCP Vegas: end-to-end congestion avoidance on a global Internet EXTERNAL
TCP/IP Illustrated, Volume 2: The Implementation EXTERNAL
Modified TCP Congestion Avoidance Algorithm EXTERNAL

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Referenced By

IETF RFC 9743 [Active*]