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PIE: A Lightweight Control Scheme To Address the Bufferbloat Problem

Document Type Replaced Internet-Draft (individual in tsv area)
Expired & archived
Authors Rong Pan , Preethi Natarajan , Chiara Piglione, Mythili Prabhu
Last updated 2015-10-14 (Latest revision 2012-12-10)
Replaced by draft-pan-aqm-pie
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Informational
Stream WG state (None)
Document shepherd (None)
IESG IESG state Replaced by draft-pan-aqm-pie
Action Holders
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD Martin Stiemerling
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Bufferbloat is a phenomenon where excess buffers in the network cause high latency and jitter. As more and more interactive applications (e.g. voice over IP, real time video streaming and financial transactions) run in the Internet, high latency and jitter degrade application performance. There is a pressing need to design intelligent queue management schemes that can control latency and jitter; and hence provide desirable quality of service to users. We present here a lightweight design, PIE(Proportional Integral controller Enhanced) that can effectively control the average queueing latency to a target value. Simulation results, theoretical analysis and Linux testbed results have shown that PIE can ensure low latency and achieve high link utilization under various congestion situations. The design does not require per-packet timestamp, so it incurs very small overhead and is simple enough to implement in both hardware and software.


Rong Pan
Preethi Natarajan
Chiara Piglione
Mythili Prabhu

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)