Conference Focus Indicating CCMP Support
draft-yusef-dispatch-ccmp-indication-02

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INTERNET-DRAFT                                            R. Shekh-Yusef
Intended Status: Standards Track                                   Avaya
Expires: August 11, 2013                                       M. Barnes
                                                                 Polycom
                                                        February 7, 2013

                Conference Focus Indicating CCMP Support
                draft-yusef-dispatch-ccmp-indication-02

Abstract

   The Centralized Conferencing Manipulation Protocol document defines a
   way for a client to discover a conference control server that
   supports CCMP. However, it does not define a way for a client
   involved in a conference to determine if the conference focus
   supports CCMP. This information would allow a CCMP-enabled client
   that joins a conference using SIP to also register for the XCON
   conference event package RFC4575 [RFC 4575] and take advantage of
   CCMP operations on the conference.

   This document describes a few options to address the above limitation
   with the pros and cons for each approach, and recommends two to be
   used depending on the need of the UA. The first approach uses the
   Call-Info header and as a result this document updates RFC3261. The
   second approach defines a new value for the 'purpose' parameter in
   the 'service-uris' element in the SIP conferencing event package, and
   as a result this document update RFC4575 [RFC 4575].

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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   The list of Internet-Draft Shadow Directories can be accessed at
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Copyright and License Notice

   Copyright (c) 2013 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.

 

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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  4
   2  Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     2.1 Call-Info  . . . . . . . . . . . . . . . . . . . . . . . . .  5
     2.2 Service URI purpose  . . . . . . . . . . . . . . . . . . . .  5
   3  Security Considerations . . . . . . . . . . . . . . . . . . . .  6
   4  IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  6
     4.1 Call-Info Header "purpose" Parameter . . . . . . . . . . . .  6
     4.2 URI Purposes Sub-registry  . . . . . . . . . . . . . . . . .  6
   5  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . .  7
   6  References  . . . . . . . . . . . . . . . . . . . . . . . . . .  7
     6.1  Normative References  . . . . . . . . . . . . . . . . . . .  7
   Appendix A. Other Approaches Considered  . . . . . . . . . . . . .  8
     A.1 Feature Tag  . . . . . . . . . . . . . . . . . . . . . . . .  8
     A.2 Conference URI purpose . . . . . . . . . . . . . . . . . . .  8
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . .  9

 

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1  Introduction

   RFC 5238 [RFC5239] defines a framework for Centralized Conferencing,
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