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Status:

EXPERIMENTAL

Authors:

R. Pan
P. Natarajan
F. Baker
G. White

Stream:

IETF

Source:

aqm (tsv)

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DOI:  https://doi.org/10.17487/RFC8033

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Abstract

Bufferbloat is a phenomenon in which excess buffers in the networkcause high latency and latency variation. As more and moreinteractive applications (e.g., voice over IP, real-time videostreaming, and financial transactions) run in the Internet, highlatency and latency variation degrade application performance. Thereis a pressing need to design intelligent queue management schemesthat can control latency and latency variation, and hence providedesirable quality of service to users.

This document presents a lightweight active queue management designcalled "PIE" (Proportional Integral controller Enhanced) that caneffectively control the average queuing latency to a target value.Simulation results, theoretical analysis, and Linux testbed resultshave shown that PIE can ensure low latency and achieve high linkutilization under various congestion situations. The design does notrequire per-packet timestamps, so it incurs very little overhead andis simple enough to implement in both hardware and software.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.