The Session Description Protocol (SDP) Application Token Attribute

Document Type Expired Internet-Draft (individual)
Authors Roni Even  , Jonathan Lennox  , Qin Wu 
Last updated 2014-10-13 (latest revision 2014-04-11)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The RTP fixed header includes the payload type number and the SSRC values of the RTP stream. RTP defines how to de-multiplex streams within an RTP session, but in some use cases applications need further identifiers in order to identify the signaling descriptions associated with particular RTP media streams. This document defines a mechanism to provide the mapping between the SSRCs of RTP streams and the SDP m-line description by defining extensions to RTP and RTCP messages.


Roni Even (
Jonathan Lennox (
Qin Wu (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)