This document provides a mechanism to use existing RTCP Feedback Codec
Control Messages (RFC 5104), as well as a group of new messages, to
pause and resume RTP media streams.
The document defines two separate mechanism for pausing and
resuming RTP streams. One mechanism codifies existing practice of how
to use RFC 5104 messages to pause and resume streams, but is only
applicable to a subset of possible RTP topologies. The other is a new
mechanism and is generally applicable. Guidance is provided as to
when one or the other mechanism should be used.
Working Group Summary
The two protocol mechanisms were the result of two separate proposals
as to how to solve the requirement; once the proposals were merged
into a single document, there were no objections to WG consensus.
There are existing deployed implementations of the RFC 5104-based
mechanisms to pause and resume RTP streams.
Paul Kyzivat performed an SDP directorate review. The review expressed concerns
about the complexity of configuration. The WG had already considered the suggested
alternatives and selected the documented method. The authors added additional text
discussing the interoperability considerations of the various supported configurations.
The Document Shepherd is Jonathan Lennox; the Responsible Area
Director is Ben Campbell.