Inter-Destination Media Synchronization (IDMS) Using the RTP Control Protocol (RTCP)
RFC 7272

 
Document
Type RFC - Proposed Standard (June 2014; No errata)
Last updated 2014-06-30
Replaces draft-brandenburg-avtcore-rtcp-for-idms
Stream IETF
Formats plain text pdf html
Stream
WG state Submitted to IESG for Publication Nov 2012
Consensus Unknown
Document shepherd Roni Even
Shepherd write-up Show (last changed 2013-05-28)
IESG
IESG state RFC 7272 (Proposed Standard)
Telechat date
Responsible AD Richard Barnes
IESG note Roni Even (roni.even@mail01.huawei.com) is the Document Shepherd.
Send notices to avtcore-chairs@ietf.org, draft-ietf-avtcore-idms@ietf.org
IANA
IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack

Email authors IPR References Referenced by Nits Search lists

Internet Engineering Task Force (IETF)                R. van Brandenburg
Request for Comments: 7272                                   H. Stokking
Category: Standards Track                                O. van Deventer
ISSN: 2070-1721                                                      TNO
                                                              F. Boronat
                                                             M. Montagud
                                                                     UPV
                                                                K. Gross
                                                            AVA Networks
                                                               June 2014

             Inter-Destination Media Synchronization (IDMS)
                 Using the RTP Control Protocol (RTCP)

Abstract

   This document defines a new RTP Control Protocol (RTCP) Packet Type
   and an RTCP Extended Report (XR) Block Type to be used for achieving
   Inter-Destination Media Synchronization (IDMS).  IDMS is the process
   of synchronizing playout across multiple media receivers.  Using the
   RTCP XR IDMS Report Block defined in this document, media playout
   information from participants in a synchronization group can be
   collected.  Based on the collected information, an RTCP IDMS Settings
   Packet can then be sent to distribute a common target playout point
   to which all the distributed receivers, sharing a media experience,
   can synchronize.

   Typical use cases in which IDMS is useful are social TV, shared
   service control (i.e., applications where two or more geographically
   separated users are watching a media stream together), distance
   learning, networked video walls, networked loudspeakers, etc.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc7272.

van Brandenburg, et al.      Standards Track                    [Page 1]
RFC 7272                      RTCP for IDMS                    June 2014

Copyright Notice

   Copyright (c) 2014 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Applicability of RTCP to IDMS . . . . . . . . . . . . . .   3
     2.2.  IDMS and ETSI . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Inter-Destination Media Synchronization (IDMS) Use Cases  . .   4
   4.  Overview of IDMS Operation  . . . . . . . . . . . . . . . . .   5
   5.  Architecture for Inter-Destination Media Synchronization  . .   7
     5.1.  Media Synchronization Application Server (MSAS) . . . . .   7
     5.2.  Synchronization Client (SC) . . . . . . . . . . . . . . .   8
     5.3.  Communication between MSAS and SCs  . . . . . . . . . . .   8
   6.  RTCP XR IDMS Report Block . . . . . . . . . . . . . . . . . .   8
   7.  RTCP Packet Type for IDMS (IDMS Settings Packet)  . . . . . .  11
   8.  Timing and NTP Considerations . . . . . . . . . . . . . . . .  13
   9.  On the Use of Presentation Timestamps . . . . . . . . . . . .  14
   10. SDP Signaling for RTCP IDMS Settings Packet . . . . . . . . .  15
   11. SDP Rules . . . . . . . . . . . . . . . . . . . . . . . . . .  16
     11.1.  Offer/Answer Rules . . . . . . . . . . . . . . . . . . .  16
     11.2.  Declarative Cases  . . . . . . . . . . . . . . . . . . .  17
   12. Security Considerations . . . . . . . . . . . . . . . . . . .  17
   13. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     13.1.  RTCP IDMS Packet Type  . . . . . . . . . . . . . . . . .  18
     13.2.  RTCP XR IDMS Report Block  . . . . . . . . . . . . . . .  19
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