%% You should probably cite draft-ietf-mmusic-sdp-capability-negotiation instead of this I-D. @techreport{andreasen-mmusic-sdp-capability-negotiation-01, number = {draft-andreasen-mmusic-sdp-capability-negotiation-01}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-andreasen-mmusic-sdp-capability-negotiation/01/}, author = {Flemming Andreasen}, title = {{SDP Capability Negotiation}}, pagetotal = 31, year = 2006, month = oct, day = 22, abstract = {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.}, }