A Mechanism for Transporting User to User Call Control Information in SIP
draft-ietf-cuss-sip-uui-07

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Document Type Active Internet-Draft (cuss WG)
Last updated 2012-10-01 (latest revision 2012-07-16)
Replaces draft-johnston-cuss-sip-uui
Stream IETF
Intended RFC status Proposed Standard
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Send notices to cuss-chairs@tools.ietf.org, draft-ietf-cuss-sip-uui@tools.ietf.org
Network Working Group                                        A. Johnston
Internet-Draft                                                     Avaya
Intended status: Standards Track                             J. Rafferty
Expires: January 17, 2013                                       Dialogic
                                                           July 16, 2012

 A Mechanism for Transporting User to User Call Control Information in
                                  SIP
                       draft-ietf-cuss-sip-uui-07

Abstract

   There is a class of applications which benefit from using SIP to
   exchange User to User Information (UUI) data during session
   establishment.  This information, known as call control UUI data, is
   a small piece of data inserted by an application initiating the
   session, and utilized by an application accepting the session.  The
   rules which apply for a specific application are defined by a UUI
   package.  This UUI data is opaque to SIP and its function is
   unrelated to any basic SIP function.  This document defines a new SIP
   header field, User-to-User, to transport UUI data, along with an
   extension mechanism.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on January 17, 2013.

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

Johnston & Rafferty     Expires January 17, 2013                [Page 1]
Internet-Draft               SIP UUI for CC                    July 2012

   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   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.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Requirements Discussion  . . . . . . . . . . . . . . . . . . .  3
   4.  Normative Definition . . . . . . . . . . . . . . . . . . . . .  5
     4.1.  Syntax for UUI Header Field  . . . . . . . . . . . . . . .  6
     4.2.  Hex Encoding Definition  . . . . . . . . . . . . . . . . .  7
     4.3.  Source Identity of UUI data  . . . . . . . . . . . . . . .  7
   5.  Guidelines for UUI Packages  . . . . . . . . . . . . . . . . .  8
     5.1.  Extensibility  . . . . . . . . . . . . . . . . . . . . . . 10
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
     6.1.  Registration of User-to-User Header Field  . . . . . . . . 10
     6.2.  Registration of User-to-User Header Field Parameters . . . 11
     6.3.  Registration of UUI Packages . . . . . . . . . . . . . . . 11
     6.4.  Registration of UUI Content Parameters . . . . . . . . . . 12
     6.5.  Registration of UUI Encoding Parameters  . . . . . . . . . 12
     6.6.  Registration of SIP Option Tag . . . . . . . . . . . . . . 12
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 13
   8.  Appendix - Other Possible Mechanisms . . . . . . . . . . . . . 13
     8.1.  Why INFO is Not Used . . . . . . . . . . . . . . . . . . . 13
     8.2.  Why Other Protocol Encapsulation UUI Mechanisms are
           Not Used . . . . . . . . . . . . . . . . . . . . . . . . . 14
     8.3.  MIME body Approach . . . . . . . . . . . . . . . . . . . . 14
     8.4.  URI Parameter  . . . . . . . . . . . . . . . . . . . . . . 15
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     10.1. Informative References . . . . . . . . . . . . . . . . . . 16
     10.2. Normative References . . . . . . . . . . . . . . . . . . . 17
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 17

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