An Extension to the Session Description Protocol (SDP) and Real-time Transport Protocol (RTP) for Media Loopback

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Document Type Active Internet-Draft (mmusic WG)
Authors Hadriel Kaplan  , Kaynam Hedayat  , Nagarjuna Venna  , Paul Jones  , Nathan Stratton 
Last updated 2012-09-13 (latest revision 2012-09-09)
Stream Internet Engineering Task Force (IETF)
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MMUSIC Working Group                                  H. Kaplan (ed.) 
  Internet-Draft                                            Acme Packet 
  Intended status: Proposed Standard                         K. Hedayat 
  Expires: March 9, 2013                                           EXFO 
                                                               N. Venna 
                                                               P. Jones 
                                                    Cisco Systems, Inc. 
                                                            N. Stratton 
                                                        BlinkMind, Inc. 
                                                      September 9, 2012 
         An Extension to the Session Description Protocol (SDP)  
        and Real-time Transport Protocol (RTP) for Media Loopback 
 Status of this Memo  
    This Internet-Draft is submitted to IETF in full conformance with 
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    Copyright (c) 2012 IETF Trust and the persons identified as the 
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    This document is subject to BCP 78 and the IETF Trust's Legal 
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 Kaplan, et al.          Expires March 9, 2013                [Page 1] 

 Internet-Draft            SDP Media Loopback            September 2012 
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    except to format it for publication as an RFC or to translate it 
    into languages other than English. 
    The wide deployment of Voice over IP (VoIP), Text and Video over IP 
    services has introduced new challenges in managing and maintaining 
    real-time voice/text/video quality, reliability, and overall 
    performance.  In particular, media delivery is an area that needs 
    attention.  One method of meeting these challenges is monitoring 
    the media delivery performance by looping media back to the 
    transmitter.  This is typically referred to as "active monitoring" 
    of services.   Media loopback is especially popular in ensuring the 
    quality of transport to the edge of a given VoIP, Real-time Text or 
    Video over IP service.  Today in networks that deliver real-time 
    media, short of running 'ping' and 'traceroute' to the edge, 
    administrators are left without the necessary tools to actively 
    monitor, manage, and diagnose quality issues with their service.  
    The extension defined herein adds new SDP media types and 
    attributes, which enable establishment of media sessions where the 
    media is looped back to the transmitter. Such media sessions will 
    serve as monitoring and troubleshooting tools by providing the 
    means for measurement of more advanced VoIP, Real-time Text and 
    Video over IP performance metrics. 
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