A modified charter has been submitted for the Multiparty Multimedia Session Control working group in the Real-time Applications and Infrastructure Area of the IETF. The IESG has not made any determination as yet. The modified charter is provided below for informational purposes only. Please send your comments to the IESG mailing list (iesg@ietf.org) by Wednesday, April 9, 2008. Multiparty Multimedia Session Control (mmusic) ---------------------------------------------- Last Modified: 2008-3-27 Current Status: Active Working Group Description of Working Group: The Multiparty MUltimedia SessIon Control (MMUSIC) Working Group was chartered to develop protocols to support Internet teleconferencing and multimedia communications. These protocols are now reasonably mature, and many have received widespread deployments. The group has revised some of these protocols in the light of implementation experience and additional demands that have arisen from other WGs (such as AVT, SIP, and SIPPING). It is focused on using and negotiating mechanisms such STUN and TURN in order to enable media sessions to traverse Network Address Translators NATs, and on new means to exchange SDP capabilities. Multimedia communications protocols use a common platform to express media and session descriptions: the Session Description Protocol, SDP. The many uses of SDP have led to (requests for) numerous extensions and have led to recognition of several flaws in the protocol design, some of which were addressed in the revision of SDP. In spite of these, it is widely deployed. The current aims of the working group include the following: - To support the establishment of multi-party multimedia sessions across NATs, MMUSIC will define an Internet Connectivity Establishment protocol (ICE). This will define several SDP extensions to work with NATs for media sessions carried over both UDP and TCP. - Various extensions to SDP will be pursued to remedy the most urgent of SDP's shortcomings. These will be limited and include adding support for limited but generic capability negotiations in SDP, defining the means to select QoS mechanisms to use for a particular media stream, enabling file transfer via the SDP Offer/Answer model, and support for media loopback. With the exception of these specific items, only extensions within the existing SDP framework will be done (e.g. registering new codecs and defining parameters for them, extending SDP to include new address families). - to maintain and revise the specification of the Real Time Streaming Protocol (RTSP), including fixes and clarifications based on implementation experience. The revised RTSP specification will be re-issued as a Proposed Standard RFC. We will also document how RTSP can be used in the presence of NAT boxes. The MMUSIC work items will be pursued in close coordination with other IETF WGs including AVT, SIP, SIPPING, SIMPLE, XCON, and BEHAVE, as well as others where appropriate such as NSIS. Goals and Milestones: Done Submit SDP to the IESG for consideration as a Proposed Standard. Done Submit RTSP to IESG for consideration as a Proposed Standard. Done Submit SIP Internet-Draft to IESG for consideration as a Proposed Standard. Done Submit SAP Internet-Draft to IESG for consideration as a Proposed Standard. Done Submit SAP Security Internet-Draft to IESG for consideration as a Proposed Standard. Done Submit IPv6 Extensions to SDP for Proposed Standard Done Submit SIP's offer/answer use of SDP for Proposed Standard Done Submit SDP source filter extensions for Proposed Standard Done Submit draft on SDPng motivations, comparisons with current SDP capabilities. Done Submit SDP security extension for Proposed Standard Done Submit IMG requirements and framework for Informational Done Submit revised SDP spec for Proposed (or Draft) Standard Done Submit SDP Offer/Answer examples for Informational Done Submit SDP connection-oriented media draft for Proposed Standard Cancelled Submit SDPng transition scenarios for Informational Done Submit updated SDP Offer/Answer examples draft for Informational Done Submit Security preconditions for SDP for Proposed Standard Done Submit ICE draft as a Proposed Standard February 2008 Submit SDP Capability Negotiations to Proposed Standard February 2008 Submit QoS Mechanism Selection in SDP as a Proposed Standard February 2008 Submit SDP Offer/Answer exchange for enabling file transfer as a Proposed Standard March 2008 Submit SDP extensions for Media Loopback for Proposed Standard March 2008 Submit Source-Specific Media Attributes in SDP as Proposed Standard March 2008 Submit Considerations for using SDP offer/answer with middleboxes for BCP April 2008 Submit Connectivity Preconditions for SDP Media Streams as Proposed Standard September 2008 Submit ICE-TCP draft as a Proposed Standard December 2008 Submit revised RTSP spec for Proposed or Draft Standard (as appropriate) December 2008 Submit RTSP NAT considerations draft January 2010 Submit revised SDP specification to IETF for Proposed Standard _______________________________________________ IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
