Conference Focus Indicating CCMP Support
draft-yusef-dispatch-ccmp-indication-04

INTERNET-DRAFT                                            R. Shekh-Yusef
Intended Status: Standards Track                                   Avaya
Updates: 3261, 4575                                            M. Barnes
Expires: November 11, 2013                                       Polycom
                                                            May 10, 2013

                Conference Focus Indicating CCMP Support
                draft-yusef-dispatch-ccmp-indication-04

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 RFC 4575 [RFC4575] 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 RFC 3261
   [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 updates RFC 4575 [RFC4575].

Status of this Memo

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Shekh-Yusef & Barnes   Expires November 11, 2013                [Page 1]
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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 . . . . . . . . . . . . . . . . . . . .  5
   4  IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  6
     4.1 Call-Info Purpose Registration . . . . . . . . . . . . . . .  6
     4.2 URI Purpose Registration . . . . . . . . . . . . . . . . . .  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,