A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : SDP Capability Negotiation
Author(s) : F. Andreasen
Filename : draft-andreasen-mmusic-sdp-capability-negotiation-00.txt
Pages : 28
Date : 2006-6-19
The Session Description Protocol (SDP) was intended for describing
multimedia sessions for the purposes of session announcement, session
invitation, and other forms of multimedia session initiation. SDP was
not intended to provide capability indication or capability
negotiation, however over the years, SDP has seen widespread adoption
and as a result it has been gradually extended to provide limited
support for these. SDP and its current extensions however do not have
the ability to negotiate one or more alternative transport protocols
(e.g. RTP profiles) which makes it particularly difficult to deploy
new RTP profiles such as secure RTP and RTP with RTCP-based feedback.
The purpose of this document is to address that by identifying a set
of requirements, evaluate existing work in this area, and provide a
recommended solution for extending SDP with capability negotiation.
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