A Session Initiation Protocol (SIP) Load Control Event Package
draft-ietf-soc-load-control-event-package-02

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Last updated 2012-01-10 (latest revision 2011-07-11)
Replaces draft-soc-load-control-event-package
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IETF SOC Working Group                                           C. Shen
Internet-Draft                                                      AT&T
Intended status: Standards Track                          H. Schulzrinne
Expires: July 13, 2012                                       Columbia U.
                                                                A. Koike
                                                                     NTT
                                                        January 10, 2012

     A Session Initiation Protocol (SIP) Load Control Event Package
            draft-ietf-soc-load-control-event-package-02.txt

Abstract

   We define a load control event package for the Session Initiation
   Protocol (SIP).  It allows SIP servers to distribute load filters to
   other SIP servers in the network.  The load filters contain rules to
   throttle calls based on their source or destination domain, telephone
   number prefix or for a specific user.  The mechanism helps to prevent
   signaling overload and complements feedback-based SIP overload
   control efforts.

Status of this Memo

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   This Internet-Draft will expire on July 13, 2012.

Copyright Notice

   Copyright (c) 2012 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Shen, et al.              Expires July 13, 2012                 [Page 1]
Internet-Draft       SIP Load Control Event Package         January 2012

   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 . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Requirements Notation  . . . . . . . . . . . . . . . . . . . .  5
   3.  Design Requirements  . . . . . . . . . . . . . . . . . . . . .  6
   4.  SIP Load Filtering Overview  . . . . . . . . . . . . . . . . .  6
     4.1.  Filter Format  . . . . . . . . . . . . . . . . . . . . . .  6
     4.2.  Filter Computation . . . . . . . . . . . . . . . . . . . .  6
     4.3.  Filter Distribution  . . . . . . . . . . . . . . . . . . .  7
     4.4.  Applicability in Different Network Environments  . . . . . 10
   5.  Load Control Event Package . . . . . . . . . . . . . . . . . . 11
     5.1.  Event Package Name . . . . . . . . . . . . . . . . . . . . 11
     5.2.  Event Package Parameters . . . . . . . . . . . . . . . . . 11
     5.3.  SUBSCRIBE Bodies . . . . . . . . . . . . . . . . . . . . . 11
     5.4.  SUBSCRIBE Duration . . . . . . . . . . . . . . . . . . . . 11
     5.5.  NOTIFY Bodies  . . . . . . . . . . . . . . . . . . . . . . 11
     5.6.  Notifier Processing of SUBSCRIBE Requests  . . . . . . . . 12
     5.7.  Notifier Generation of NOTIFY Requests . . . . . . . . . . 12
     5.8.  Subscriber Processing of NOTIFY Requests . . . . . . . . . 12
     5.9.  Handling of Forked Requests  . . . . . . . . . . . . . . . 13
     5.10. Rate of Notifications  . . . . . . . . . . . . . . . . . . 13
     5.11. State Delta  . . . . . . . . . . . . . . . . . . . . . . . 13
     5.12. State Agents . . . . . . . . . . . . . . . . . . . . . . . 14
   6.  Load Control Document  . . . . . . . . . . . . . . . . . . . . 14
     6.1.  Format . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     6.2.  Namespace  . . . . . . . . . . . . . . . . . . . . . . . . 15
     6.3.  Conditions . . . . . . . . . . . . . . . . . . . . . . . . 15
       6.3.1.  Call Identity  . . . . . . . . . . . . . . . . . . . . 15
       6.3.2.  Validity . . . . . . . . . . . . . . . . . . . . . . . 18
       6.3.3.  Method . . . . . . . . . . . . . . . . . . . . . . . . 18
     6.4.  Actions  . . . . . . . . . . . . . . . . . . . . . . . . . 18
     6.5.  Complete Examples  . . . . . . . . . . . . . . . . . . . . 19
   7.  XML Schema Definition for Load Control . . . . . . . . . . . . 21
   8.  Related Work . . . . . . . . . . . . . . . . . . . . . . . . . 22
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