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Inter-destination Media Synchronization using the RTP Control Protocol (RTCP)
draft-ietf-avtcore-idms-13

Document type: Active Internet-Draft (avtcore WG)
Document stream: IETF
Last updated: 2013-09-19 (latest revision 2013-08-29)
Intended RFC status: Proposed Standard
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication Nov 2012
Consensus: Unknown
Document shepherd: Roni Even
Shepherd Write-Up: Last changed 2013-05-28

IESG State: RFC Ed Queue
IANA Action State: RFC-Ed-Ack
RFC Editor State: EDIT
Responsible AD: Richard Barnes
IESG Note: Roni Even (roni.even@mail01.huawei.com) is the Document Shepherd.
Send notices to: avtcore-chairs@tools.ietf.org, draft-ietf-avtcore-idms@tools.ietf.org

AVTCore                                               R. van Brandenburg
Internet-Draft                                               H. Stokking
Intended status: Standards Track                         O. van Deventer
Expires: March 02, 2014                                              TNO
                                                              F. Boronat
                                                             M. Montagud
                                     Universitat Politecnica de Valencia
                                                                K. Gross
                                                            AVA Networks
                                                         August 29, 2013

 Inter-destination Media Synchronization using the RTP Control Protocol
                                 (RTCP)
                       draft-ietf-avtcore-idms-13

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 geographically distributed
   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 Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

van Brandenburg, et al.  Expires March 02, 2014                 [Page 1]
Internet-Draft                RTCP for IDMS                  August 2013

   This Internet-Draft will expire on March 02, 2014.

Copyright 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
   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
   2.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Applicability of RTCP to IDMS . . . . . . . . . . . . . .   3
     2.2.  IDMS and ETSI . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Inter-Destination Media Synchronization (IDMS) use cases  . .   4
   5.  Overview of IDMS operation  . . . . . . . . . . . . . . . . .   5
   6.  Architecture for Inter-Destination Media Synchronization  . .   7
     6.1.  Media Synchronization Application Server (MSAS) . . . . .   7
     6.2.  Synchronization Client (SC) . . . . . . . . . . . . . . .   8
     6.3.  Communication between MSAS and SCs  . . . . . . . . . . .   8
   7.  RTCP XR Block for IDMS (IDMS Report Block)  . . . . . . . . .   8
   8.  RTCP Packet Type for IDMS (IDMS Settings) . . . . . . . . . .  11
   9.  Timing and NTP Considerations . . . . . . . . . . . . . . . .  13
   10. On the use of presentation timestamps . . . . . . . . . . . .  14
   11. SDP Signalling for RTCP IDMS Packet Type  . . . . . . . . . .  15
   12. SDP rules . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     12.1.  Offer/Answer rules . . . . . . . . . . . . . . . . . . .  16
     12.2.  Declarative cases  . . . . . . . . . . . . . . . . . . .  17
   13. Security Considerations . . . . . . . . . . . . . . . . . . .  17

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