A Session Initiation Protocol (SIP) Load Control Event Package
draft-ietf-soc-load-control-event-package-08

IETF SOC Working Group                                           C. Shen
Internet-Draft                                            H. Schulzrinne
Intended status: Standards Track                             Columbia U.
Expires: September 14, 2013                                     A. Koike
                                                                     NTT
                                                          March 13, 2013

     A Session Initiation Protocol (SIP) Load Control Event Package
            draft-ietf-soc-load-control-event-package-08.txt

Abstract

   We define a load control event package for the Session Initiation
   Protocol (SIP).  It allows SIP entities to distribute load filtering
   policies to other SIP entities in the network.  The load filtering
   policies 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.

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Shen, et al.           Expires September 14, 2013               [Page 1]
Internet-Draft       SIP Load Control Event Package           March 2013

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Design Requirements . . . . . . . . . . . . . . . . . . . . .   6
   5.  SIP Load Filtering Overview . . . . . . . . . . . . . . . . .   6
     5.1.  Load Filtering Policy Format  . . . . . . . . . . . . . .   6
     5.2.  Load Filtering Policy Computation . . . . . . . . . . . .   7
     5.3.  Load Filtering Policy Distribution  . . . . . . . . . . .   7
     5.4.  Applicability in Different Network Environments . . . . .  10
   6.  Load Control Event Package  . . . . . . . . . . . . . . . . .  11
     6.1.  Event Package Name  . . . . . . . . . . . . . . . . . . .  11
     6.2.  Event Package Parameters  . . . . . . . . . . . . . . . .  11
     6.3.  SUBSCRIBE Bodies  . . . . . . . . . . . . . . . . . . . .  11
     6.4.  SUBSCRIBE Duration  . . . . . . . . . . . . . . . . . . .  12
     6.5.  NOTIFY Bodies . . . . . . . . . . . . . . . . . . . . . .  12
     6.6.  Notifier Processing of SUBSCRIBE Requests . . . . . . . .  12
     6.7.  Notifier Generation of NOTIFY Requests  . . . . . . . . .  12
     6.8.  Subscriber Processing of NOTIFY Requests  . . . . . . . .  13
     6.9.  Handling of Forked Requests . . . . . . . . . . . . . . .  14
     6.10. Rate of Notifications . . . . . . . . . . . . . . . . . .  14
     6.11. State Delta . . . . . . . . . . . . . . . . . . . . . . .  14
   7.  Load Control Document . . . . . . . . . . . . . . . . . . . .  15
     7.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     7.2.  Namespace . . . . . . . . . . . . . . . . . . . . . . . .  15
     7.3.  Conditions  . . . . . . . . . . . . . . . . . . . . . . .  16
       7.3.1.  Call Identity . . . . . . . . . . . . . . . . . . . .  16
       7.3.2.  Method  . . . . . . . . . . . . . . . . . . . . . . .  19
       7.3.3.  Target SIP Entity . . . . . . . . . . . . . . . . . .  19
       7.3.4.  Validity  . . . . . . . . . . . . . . . . . . . . . .  20
     7.4.  Actions . . . . . . . . . . . . . . . . . . . . . . . . .  21
     7.5.  Complete Examples . . . . . . . . . . . . . . . . . . . .  22