Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-sdpneg
Christian Groves <Christian.Groves@nteczone.com> Thu, 26 November 2015 00:39 UTC
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To: mmusic@ietf.org, "Stoetzer-Bradler, Juergen (Juergen)" <juergen.stoetzer-bradler@alcatel-lucent.com>
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From: Christian Groves <Christian.Groves@nteczone.com>
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Date: Thu, 26 Nov 2015 11:39:22 +1100
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Subject: Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-sdpneg
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Hello Juergen, all, I have reviewed the document and I don't think there are any major issues preventing it from going forward. My comments below: General: Double check acronyms are spelled out on first use, e.g. SCTP, SDP General: Sometimes "subprotocol" is used, sometimes "sub-protocol" I guess we should be consistent. Sect.1: The 2nd sentence seems confusing. I propose to reword "RTCWeb allows applications to use data channels. It RTCWeb defines an in-band DCEP however other in-band or out-of-band protocols may be used for establishing datachannels. Sect.5.1.1: (defined in Section 4 ), this should probably be section 3? Sect.5.1.1 1st para last sentence: Reliability is now two parameters: max-retr & max-time Sect.5.1.1 1st para last sentence: Priority is not defined by the syntax however its part of DCEP. Do we need to add this? Sect.5.1.1.1: "maxretr-value" should we actually add an ABNF value for this? The referred to draft doesn't have ABNF. Its a 2 byte integer Sect.5.1.1.1: "maxtime-value" should we actually add an ABNF value for this? The referred to draft doesn't have ABNF. Its a 2 byte integer Sect.5.1.1.1: The example for a=dcmap:4, wouldn't this be invalid as it contains both the max-time and max-retr parameters? Sect.5.2.3, pg.14, 7th bullet: "Closes any created data channels for which the expected "a=dcmap:" and "a=dcsa:" attributes are not present in the SDP answer." Should this also refer to section 5.2.4 on closure? Sect.5.2.5: The miscellaneous section doesn't explicitly cover the case when a=dcmap is missing but a=dsca is included. I take it that its an error. Should we add this? Sect.6 1st para under fig.2: "So, the offerer should close the ..." is this really a "MUST close"? There is text about reusing a data channel but does it apply in this case when no previous data channel has been extablished? Sect.6 bottom pg.18: "Continuing on the earlier example in Figure 1" Is this a continuation of figure 2? The text below figure 3 indicates that MSRP SCTP stream ID 2 is removed. This is example 2. Sect.8.2.2: DCSA appropriate values. Now defined in sect. 5.1.2.1 Sect.11.2: There are no usages of RFCs 4975, 4976, 5547, 6135 and 6714 in the document. These can be deleted. Sect.11.2: There are no usages of RFC6455 and I-D.ietf-rtcweb-jsep the document other than in the changes section. These can be deleted. Minor editorials: Sent offline to author. Regards, Christian On 25/11/2015 8:52 PM, Bo Burman wrote: > > This is to announce a 4 week Working Group Last Call for > > draft-ietf-mmusic-data-channel-sdpneg-06 > > as proposed standard. > > Please review and provide any comments you may have on the document by > Wednesday, December 23, 2015. Comments should be sent to the document > authors and the MMUSIC WG list. If you review the document but do not > have any comments, please send a note to that effect as well. > > Please also forward this WGLC call to any other interested parties who > may be able to review the draft, asking them to also direct their > comments to the authors and the list as above. > > Thank you! > > Bo Burman (MMUSIC co-chair) > > Draft information: > > This draft is a work item of the Multiparty Multimedia Session Control > Working Group of the IETF. > > Title : SDP-based Data Channel Negotiation > > Authors : Keith Drage > > Maridi R. Makaraju (Raju) > > Juergen Stoetzer-Bradler > > Richard Ejzak > > Jerome Marcon > > Filename : > draft-ietf-mmusic-data-channel-sdpneg-06.txt > > Pages : 37 > > Date : 2015-10-19 > > Abstract: > > The Real-Time Communication in WEB-browsers (RTCWeb) working group is > > charged to provide protocols to support direct interactive rich > > communications using audio, video, and data between two peers' web- > > browsers. For the support of data communication, the RTCWeb working > > group has in particular defined the concept of bi-directional data > > channels over SCTP, where each data channel might be used to > > transport other protocols, called sub-protocols. Data channel setup > > can be done using either the in-band Data Channel Establishment > > Protocol (DCEP) or using some out-of-band non-DCEP protocol. This > > document specifies how the SDP offer/answer exchange can be used to > > achieve such an out-of-band non-DCEP negotiation. Even though data > > channels are designed for RTCWeb use initially they may be used by > > other protocols like, but not limited to, the CLUE protocol. This > > document is intended to be used wherever data channels are used. > > The IETF datatracker status page for this draft is: > > https://datatracker.ietf.org/doc/draft-ietf-mmusic-data-channel-sdpneg/ > > There's also a htmlized version available at: > > https://tools.ietf.org/html/draft-ietf-mmusic-data-channel-sdpneg-06 > > A diff from the previous version is available at: > > https://www.ietf.org/rfcdiff?url2=draft-ietf-mmusic-data-channel-sdpneg-06 > > Internet-Drafts are also available by anonymous FTP at: > > ftp://ftp.ietf.org/internet-drafts/ > > > > _______________________________________________ > mmusic mailing list > mmusic@ietf.org > https://www.ietf.org/mailman/listinfo/mmusic
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-… Bo Burman
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… DRAGE, Keith (Keith)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… DRAGE, Keith (Keith)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Schwarz, Albrecht (Nokia - DE)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat