A Call Control and Multi-Party Usage Framework for the Session Initiation Protocol (SIP)
RFC 5850

 
Document Type RFC - Informational (May 2010; Errata)
Last updated 2013-06-19
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IESG IESG state RFC 5850 (Informational)
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Responsible AD Cullen Jennings
Send notices to sipping-chairs@ietf.org, draft-ietf-sipping-cc-framework@ietf.org
Internet Engineering Task Force (IETF)                           R. Mahy
Request for Comments: 5850                                  Unaffiliated
Category: Informational                                        R. Sparks
ISSN: 2070-1721                                                  Tekelec
                                                            J. Rosenberg
                                                             jdrosen.net
                                                               D. Petrie
                                                                   SIPez
                                                        A. Johnston, Ed.
                                                                   Avaya
                                                                May 2010

           A Call Control and Multi-Party Usage Framework for
                 the Session Initiation Protocol (SIP)

Abstract

   This document defines a framework and the requirements for call
   control and multi-party usage of the Session Initiation Protocol
   (SIP).  To enable discussion of multi-party features and
   applications, we define an abstract call model for describing the
   media relationships required by many of these.  The model and actions
   described here are specifically chosen to be independent of the SIP
   signaling and/or mixing approach chosen to actually set up the media
   relationships.  In addition to its dialog manipulation aspect, this
   framework includes requirements for communicating related information
   and events such as conference and session state and session history.
   This framework also describes other goals that embody the spirit of
   SIP applications as used on the Internet such as the definition of
   primitives (not services), invoker and participant oriented
   primitives, signaling and mixing model independence, and others.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc5850.

Mahy, et al.                  Informational                     [Page 1]
RFC 5850               SIP Call Control Framework               May 2010

Copyright Notice

   Copyright (c) 2010 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
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   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Motivation and Background  . . . . . . . . . . . . . . . . . .  4
   2.  Key Concepts . . . . . . . . . . . . . . . . . . . . . . . . .  6
     2.1.  Conversation Space Model . . . . . . . . . . . . . . . . .  7
     2.2.  Relationship between Conversation Space, SIP Dialogs,
           and SIP Sessions . . . . . . . . . . . . . . . . . . . . .  8
     2.3.  Signaling Models . . . . . . . . . . . . . . . . . . . . .  9
     2.4.  Mixing Models  . . . . . . . . . . . . . . . . . . . . . . 10
       2.4.1.  Tightly Coupled  . . . . . . . . . . . . . . . . . . . 11
       2.4.2.  Loosely Coupled  . . . . . . . . . . . . . . . . . . . 12
     2.5.  Conveying Information and Events . . . . . . . . . . . . . 13
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