[AVT] Re: WG Action: RECHARTER: Audio/Video Transport (avt)

[Colin Perkins <[e-mail]>]

Mark,

I fully agree with your assessment. You'll note that the new charter 
says that we will "consider" updating the MIB; the issues you mention 
are those we should work through in the next year or so, to make a 
decision on how to proceed and if there is sufficient community to do 
the work.

The first stage is probably to identify a volunteer to look into these 
issues...

Colin



On Wednesday, Oct 8, 2003, at 17:04 Europe/London, Mark Baugher wrote:

> I see that we want to advance the RTP MIB to draft standard.  At 
> minimum, I think we will want to consider updating the RTP MIB for 
> SRTP.  This is also an opportunity to review 
> ftp://ftp.rfc-editor.org/in-notes/rfc2959.txt and try to ascertain 
> if/how the RTP MIB is used in products or tools.  This MIB was 
> reference by the ITU for H.323 management and there were a number of 
> technical issues in trying to balance multicast uses with 
> pairwise/unicast uses of the RTP MIB.
>
> I think we will need to find a constituency who have products that use 
> the RTP MIB, or need to, and who will drive the effort just as the ITU 
> folks drove the original MIB effort.  To my knowledge, many of the 
> individuals who led this effort are now doing other things and I don't 
> know of any product implementations of the RTP MIB (is videoserver 
> corp even around anymore, it looks like a web commerce site?).
>
> Although we only need two interoperable implementations for draft 
> status, this could be complex since interoperability is bifurcated 
> between pairwise/unicast and multicast types of applications.
>
> Mark
>
> At 08:26 AM 10/8/2003, The IESG wrote:
>> The charter of the Audio/Video Transport (avt) working group in
>> Transport Area of the IETF has been updated.  For additional 
>> information,
>> please contact the Area Directors or the working group Chairs.
>>
>> Audio/Video Transport (avt)
>> ---------------------------
>>
>> Current Status: Active Working Group
>>
>> Chair(s):
>> Colin Perkins <[e-mail]>
>> Magnus Westerlund <[e-mail]>
>>
>> Transport Area Director(s):
>> Allison Mankin <[e-mail]>
>> Jon Peterson <[e-mail]>
>>
>> Transport Area Advisor:
>> Allison Mankin <[e-mail]>
>>
>> Mailing Lists:
>> General Discussion: [e-mail]
>> To Subscribe: [e-mail]
>> Archive: 
>> www.ietf.org/mail-archive/working-groups/avt/current/maillist.html
>>
>> The Audio/Video Transport Working Group was formed to specify a
>> protocol for real-time transmission of audio and video over unicast
>> and multicast UDP/IP. This is the Real-time Transport Protocol, RTP,
>> together with its associated profiles and payload formats. The
>> current aims of the working group are:
>>
>>  - to advance the main RTP specification and RTP Profile
>>    for Audio and Video Conferences with Minimal Control
>>    for publication as full Internet Standards
>>
>>  - to review and revise existing payload formats to advance those
>>    which are useful to Draft Standard, and to declare others
>>    as Historic. Milestones will be established as a champion for
>>    each payload format is identified.
>>
>>  - to develop payload formats for new media codecs, and to
>>    document best-current practices in payload format design.
>>    The group continues to be precluded from work on codecs
>>    themselves because of overlap with the other standards
>>    bodies, and because the IETF does not have the ability
>>    to effectively review new codecs. An exception was made
>>    for the freeware iLBC codec on a highly experimental basis,
>>    but acceptance of new codec work is unexpected and subject
>>    to rechartering.
>>
>>  - to complete the forward error correction work in the ULP and
>>    UXP payload formats
>>
>>  - to extend RTP to work with Source-Specific Multicast sessions
>>    with unicast feedback
>>
>>  - to provide a framing mechanism for RTP over TCP and TLS
>>
>>  - to review the applicability of Compressed RTP operation on
>>    MPLS networks, developing extensions as necessary
>>
>>  - to develop a new RTP profile as the combination of the SRTP
>>    profile and the Extended RTP Profile for RTCP-based Feedback
>>    (RTP/SAVPF)
>>
>> The group will also coordinate with the DCCP working group to
>> ensure that RTP can be efficiently transported over DCCP.
>>
>> The longer term goals of the working group are to advance the
>> SRTP Profile, the Extended RTP Profile for RTCP-based Feedback,
>> the Compressed RTP framework, and the RTP MIB to Draft Standard.
>>
>> The group has no plans to develop new RTP profiles beyond those
>> listed above, but will consider rechartering to produce profile
>> level extensions if appropriate.
>>
>> Milestones:
>>
>> Oct 2003  Review DCCP including prototypes and API; feedback to DCCP 
>> WG
>> Nov 2003  Initial draft requirements for ECRTP over MPLS; discuss 
>> with MPLS WG
>> Dec 2003  Submit UXP Payload Format for Proposed Standard
>> Dec 2003  Submit ULP Payload Format for Proposed Standard
>> Dec 2003  Submit RTCP/SSM draft for Proposed Standard
>> Dec 2003  Submit iLBC codec specification for Experimental
>> Dec 2003  Submit iLBC payload format for Proposed Standard
>> Jan 2004  Advance RTP specification and A/V profile to Full Standard
>> Mar 2004  Submit Framing of RTP for TCP and TLS for Proposed Standard
>> Mar 2004  Identify payload formats to classify as Historic
>> Mar 2004  Finish requirements for ECRTP over MPLS;
>>           recharter for subsequent work
>> Jul 2004  Submit RTP/SAVPF profile for Proposed Standard
>> Jul 2004  Begin update of SRTP profile for Draft Standard RFC
>> Jul 2004  Begin update of RTP/AVPF profile for Draft Standard RFC
>> Aug 2004  Consider update of RTP MIB
>> Nov 2004  Collect SRTP implementation reports
>> Nov 2004  Collect RTP/AVPF implementation reports
>> Mar 2005  Submit SRTP for Draft Standard
>> Mar 2005  Submit RTP/AVPF for Draft Standard
>
>
-- 
Colin Perkins
http://csperkins.org/


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