datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

Session Initiation Protocol (SIP) Rate Control
draft-ietf-soc-overload-rate-control-07

Document type: Active Internet-Draft (soc WG)
Document stream: IETF
Last updated: 2014-01-06
Intended RFC status: Unknown
Other versions: plain text, pdf, html

IETF State: WG Document
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

SOC Working Group                                             Eric Noel
Internet-Draft                                                AT&T Labs
Intended status: Standards Track                      Philip M Williams
Expires: July 2, 2014                              BT Innovate & Design

                                                        January 2, 2014

              Session Initiation Protocol (SIP) Rate Control
                draft-ietf-soc-overload-rate-control-07.txt

Abstract

   The prevalent use of Session Initiation Protocol (SIP) in Next
   Generation Networks necessitates that SIP networks provide adequate
   control mechanisms to maintain transaction throughput by preventing
   congestion collapse during traffic overloads. Already a loss-based
   solution to remedy known vulnerabilities of the SIP 503 (service
   unavailable) overload control mechanism has been proposed. This
   document proposes a rate-based control scheme to complement the
   loss-based control scheme, using the same signaling.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six
   months and may be updated, replaced, or obsoleted by other documents
   at any time.  It is inappropriate to use Internet-Drafts as
   reference material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 2, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Noel, et al.             Expires July 2, 2014                  [Page 1]
Internet-Draft             SIP Rate Control                January 2014

   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document. Please review these documents
   carefully, as they describe your rights and restrictions with
   respect to this document. Code Components extracted from this
   document must include Simplified BSD License text as described in
   Section 4.e of the Trust Legal Provisions and are provided without
   warranty as described in the Simplified BSD License.

   Table of Contents

   1. Introduction...................................................2
   2. Terminology....................................................3
   3. Rate-based algorithm scheme....................................4
      3.1. Overview..................................................4
      3.2. Via header field parameters for overload control..........4
      3.3. Client and server rate-control algorithm selection........5
      3.4. Server operation..........................................5
      3.5. Client operation..........................................7
         3.5.1. Default algorithm....................................7
         3.5.2. Priority treatment..................................10
         3.5.3. Optional enhancement: avoidance of resonance........11
   4. Example.......................................................13
   5. Syntax........................................................14
   6. Security Considerations.......................................14
   7. IANA Considerations...........................................16
   8. References....................................................17
      8.1. Normative References.....................................17
      8.2. Informative References...................................17
   Appendix A. Contributors.........................................18
   Appendix B. Acknowledgments......................................18

1. Introduction

   The use of SIP in large scale Next Generation Networks requires that
   SIP based networks provide adequate control mechanisms for handling
   traffic growth. In particular, SIP networks must be able to handle
   traffic overloads gracefully, maintaining transaction throughput by
   preventing congestion collapse.

   A promising SIP based overload control solution has been proposed in
   [draft-ietf-soc-overload-control-14]. That solution provides a
   communication scheme for overload control algorithms. It also
   includes a default loss-based overload control algorithm that makes
   it possible for a set of clients to limit offered load towards an
   overloaded server.

Noel, et al.             Expires July 2, 2014                  [Page 2]

[include full document text]