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Title: System and method for implementing periodic early discard in on-chip buffer memories of network elements

Abstract

An advance is made over the prior art in accordance with the principles of the present invention that is directed to a new approach for a system and method for a buffer management scheme called Periodic Early Discard (PED). The invention builds on the observation that, in presence of TCP traffic, the length of a queue can be stabilized by selection of an appropriate frequency for packet dropping. For any combination of number of TCP connections and distribution of the respective RTT values, there exists an ideal packet drop frequency that prevents the queue from over-flowing or under-flowing. While the value of the ideal packet drop frequency may quickly change over time and is sensitive to the series of TCP connections affected by past packet losses, and most of all is impossible to compute inline, it is possible to approximate it with a margin of error that allows keeping the queue occupancy within a pre-defined range for extended periods of time. The PED scheme aims at tracking the (unknown) ideal packet drop frequency, adjusting the approximated value based on the evolution of the queue occupancy, with corrections of the approximated packet drop frequency that occur at a timescale that ismore » comparable to the aggregate time constant of the set of TCP connections that traverse the queue.

Inventors:
Issue Date:
Research Org.:
Alcatel Lucent (Paris, FR)
Sponsoring Org.:
USDOE
OSTI Identifier:
1084051
Patent Number(s):
8441927
Application Number:
13/006,142
Assignee:
Alcatel Lucent (Paris, FR)
Patent Classifications (CPCs):
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
DOE Contract Number:  
EE0002887
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Francini, Andrea. System and method for implementing periodic early discard in on-chip buffer memories of network elements. United States: N. p., 2013. Web.
Francini, Andrea. System and method for implementing periodic early discard in on-chip buffer memories of network elements. United States.
Francini, Andrea. Tue . "System and method for implementing periodic early discard in on-chip buffer memories of network elements". United States. https://www.osti.gov/servlets/purl/1084051.
@article{osti_1084051,
title = {System and method for implementing periodic early discard in on-chip buffer memories of network elements},
author = {Francini, Andrea},
abstractNote = {An advance is made over the prior art in accordance with the principles of the present invention that is directed to a new approach for a system and method for a buffer management scheme called Periodic Early Discard (PED). The invention builds on the observation that, in presence of TCP traffic, the length of a queue can be stabilized by selection of an appropriate frequency for packet dropping. For any combination of number of TCP connections and distribution of the respective RTT values, there exists an ideal packet drop frequency that prevents the queue from over-flowing or under-flowing. While the value of the ideal packet drop frequency may quickly change over time and is sensitive to the series of TCP connections affected by past packet losses, and most of all is impossible to compute inline, it is possible to approximate it with a margin of error that allows keeping the queue occupancy within a pre-defined range for extended periods of time. The PED scheme aims at tracking the (unknown) ideal packet drop frequency, adjusting the approximated value based on the evolution of the queue occupancy, with corrections of the approximated packet drop frequency that occur at a timescale that is comparable to the aggregate time constant of the set of TCP connections that traverse the queue.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {5}
}

Works referenced in this record:

Sizing router buffers
conference, January 2004

  • Appenzeller, Guido; Keslassy, Isaac; McKeown, Nick
  • Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications - SIGCOMM '04
  • https://doi.org/10.1145/1015467.1015499

Random early detection gateways for congestion avoidance
journal, January 1993


Load balancing based on queue length, in a network of processor stations
patent, October 2000


A self-configuring RED gateway
conference, January 1999

  • Feng, W. -C.; Kandlur, D. D.; Saha, D.
  • IEEE INFOCOM '99. Conference on Computer Communications. Proceedings. Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies. The Future is Now (Cat. No.99CH36320)
  • https://doi.org/10.1109/INFCOM.1999.752150

High performance TCP in ANSNET
journal, October 1994


Architecture for high speed class of service enabled linecard
patent, February 2004


Perspectives on router buffer sizing: recent results and open problems
journal, March 2009


Queue measurement apparatus and methodology
patent, August 1999


Update on buffer sizing in internet routers
journal, October 2006