IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet

Metadata

Publisher: IETF
Doc Type: Informational
Pages: 32
Abstract: This document discusses IAB concerns about effective end-to-end congestion control for best-effort voice traffic in the Internet. These concerns have to do with fairness, user quality, and with the dangers of congestion collapse. The concerns are particularly relevant in light of the absence of a widespread Quality of Service (QoS) deployment in the Internet, and the likelihood that this situation will not change much in the near term. This document is not making any recommendations about deployment paths for Voice over Internet Protocol (VoIP) in terms of QoS support, and is not claiming that best-effort service can be relied upon to give acceptable performance for VoIP. We are merely observing that voice traffic is occasionally deployed as best-effort traffic over some links in the Internet, that we expect this occasional deployment to continue, and that we have concerns about the lack of effective end-to-end congestion control for this best-effort voice traffic. This memo provides information for the Internet community.
Publication Date: 2004-03-01
Status Note: Informational
DOI: 10.17487/RFC3714
Link: https://doi.org/10.17487/RFC3714
Author(s): Sally Floyd
James Kempf
Keyword(s): QoS, Qualify of Service, VoIP, IP

Latest version of IETF RFC 3714

Document Versions — IETF RFC 3714

▶ IETF RFC 3714 (2004-03-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 2988 [Superseded*]
IETF RFC 3267 [Superseded*]

Bibliographic Reference(s)

Next Steps in Signaling (nsis), IETF Working Group, URL " http://www.ietf.cnri.reston.va.us/html.charters/nsis- charter.html ". EXTERNAL
Free World Dialup, URL "www.pulver.com/fwd/". EXTERNAL
The end2end-interest mailing list, URL " http://www.postel.org/mailman/listinfo/end2end- interest ". EXTERNAL
Web Page on Round-Trip Times in the Internet, URL " http://www.icir.org/floyd/rtt-questions.html " EXTERNAL
Wenyu Jiang and Henning Schulzrinne, Modeling of Packet Loss and Delay and Their Effect on Real-Time Multimedia Service Quality, NOSSDAV, 2000. URL " http://citeseer.nj.nec.com/jiang00modeling.html ". EXTERNAL
Joerg Widmer, Martin Mauve, and Jan Peter Damm. Probabilistic Congestion Control for Non-Adaptable Flows. Technical Report 3/2001, Department of Mathematics and Computer Science, University of Mannheim. URL " http://www.informatik.uni- mannheim.de/informatik/pi4/projects/ CongCtrl/pcc/index.html". EXTERNAL
Deepak Bansal, Hari Balakrishnan, Sally Floyd, and Scott Shenker, Dynamic Behavior of Slowly-Responsive Congestion Control Algorithms, SIGCOMM 2001. EXTERNAL
G.S. Kang, L.J. Fransen, and E.L. Kline, "Multirate Processor (MRP) for Digital Voice Communications", NRL Report 8295, Naval Research Laboratory, Washington DC, March 1979. EXTERNAL
G.S. Kang and L.J. Fransen, "Second Report of the Multirate Processor (MRP) for Digital Voice Communications", NRL Report 8614, Naval Research Laboratory, Washington DC, September 1982. EXTERNAL
Eddie Kohler, Mark Handley, Sally Floyd, and Jitendra Padhye, Datagram Congestion Control Protocol (DCCP), internet-draft Work in Progress, March 2003. URL " http://www.icir.org/kohler/dcp/ ". EXTERNAL
Resource Reservation Setup Protocol (rsvp), Concluded Working Group, URL " http://www.ietf.cnri.reston.va.us/html.charters/ OLD/rsvp-charter.html ". EXTERNAL
S. Floyd and R. Mahajan, Router Primitives for Protection Against High-Bandwidth Flows and Aggregates, internet draft (not yet submitted). EXTERNAL
Vonage, URL "www.vonage.com". EXTERNAL
S. Floyd, M. Handley, J. Padhye, J. Widmer, "Equation- Based Congestion Control for Unicast Applications", ACM SIGCOMM 2000. EXTERNAL
J. Woodward, Speech Coding, Communications Research Group, University of Southampton, 1998. URL " http://www-mobile.ecs.soton.ac.uk/speech_codecs/ ", EXTERNAL
Ran Atkinson, An ISP Reality Check, Presentation to ieprep, 55th IETF Meeting, November 2002. URL " http://www.ietf.cnri.reston.va.us/proceedings/ 02nov/219.htm#slides ". EXTERNAL
J. Padhye, V. Firoiu, D. Towsley, J. Kurose, Modeling TCP Throughput: A Simple Model and its Empirical Validation, Tech Report TF 98-008, U. Mass, February 1998. EXTERNAL
Wenyu Jiang and Henning Schulzrinne, Comparison and Optimization of Packet Loss Repair Methods on VoIP Perceived Quality under Bursty Loss, NOSSDAV, 2002. URL " http://www1.cs.columbia.edu/~wenyu/ ". EXTERNAL
Internet Emergency Preparedness (ieprep), Minutes, 55th IETF Meeting, November 2002. URL " http://www.ietf.cnri.reston.va.us/proceedings/ 02nov/219.htm#cmr ". EXTERNAL
S.V. Andersen, et. al., Internet Low Bit Rate Codec, Work in Progress, March 2003. EXTERNAL
Web page on "Measurement Studies of End-to-End Congestion Control in the Internet", URL " http://www.icir.org/floyd/ccmeasure.html ". The section on "Network Measurements at Specific Sites" includes measurement data about the distribution of packet sizes on various links in the Internet. EXTERNAL
H. Schulzrinne, private communication, 2003. EXTERNAL
Wenyu Jiang, Kazummi Koguchi, and Henning Schulzrinne, QoS Evaluation of VoIP End-points, ICC 2003. URL " http://www1.cs.columbia.edu/~wenyu/ ". EXTERNAL
The maximum feasible drop rate for VoIP traffic depends on the codec. These numbers are a range for a variety of codecs; voice quality begins to deteriorate for many codecs around a 10% drop rate. Note from authors. EXTERNAL
V. Jacobson, Congestion Avoidance and Control, ACM SIGCOMM '88, August 1988. EXTERNAL
Differentiated Services (diffserv), Concluded Working Group, URL " http://www.ietf.cnri.reston.va.us/html.charters/ OLD/diffserv-charter.html ". EXTERNAL
Brian Adamson, private communication, June 2003. EXTERNAL
A. P. Markopoulou, F. A. Tobagi, and M. J. Karam, "Assessing the Quality of Voice Communications Over Internet Backbones", IEEE/ACM Transactions on Networking, V. 11 N. 5, October 2003. EXTERNAL
The Interactive VOice eXchange, URL " http://manimac.itd.nrl.navy.mil/IVOX/ ". EXTERNAL
IETF RFC 896 [Superseded*]
IETF RFC 1890 [Superseded*]
IETF RFC 2474 [Active*]
IETF RFC 2581 [Superseded*]
IETF RFC 2597 [Active*]
IETF RFC 2748 [Active*]
IETF RFC 2914 [Active*]
IETF RFC 2990 [Active*]
IETF RFC 3042 [Active*]
IETF RFC 3168 [Active*]
IETF RFC 3246 [Active*]
IETF RFC 3448 [Superseded*]
IETF RFC 3551 [Active*]
T-REC-G.114.2003 — G.114 EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/RFC3714.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

IETF RFC 3714, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet. Available at https://doi.org/10.17487/RFC3714

Snippet:

IETF RFC 3714, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet. Available at https://doi.org/10.17487/RFC3714

HTML (ISO 690 compliant)

Preview:

IETF RFC 3714, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet. Available at https://doi.org/10.17487/RFC3714

Snippet:

<span class="citation"><cite>IETF RFC 3714</cite>, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet. Available at <a href="https://doi.org/10.17487/RFC3714" target="_blank" rel="noopener">https://doi.org/10.17487/RFC3714</a></span>

SMPTE's HTML Pub

Preview:

IETF RFC 3714, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet
doi: 10.17487/RFC3714
url: https://doi.org/10.17487/RFC3714

Snippet:

<li>
<cite id="bib-rfc3714">IETF RFC 3714</cite>, IAB Concerns Regarding Congestion Control for Voice Traffic in the Internet
<span class="doi">10.17487/RFC3714</span>
</li>

Referenced By

IETF RFC 4103 [Active*]
IETF RFC 4342 [Active*]
IETF RFC 4774 [Active*]