[rmcat] Update of draft-ietf-rmcat-scream-cc (was RE: Shepherd review of draft-ietf-rmcat-scream-cc-07)
Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Mon, 29 May 2017 15:26 UTC
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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>, Martin Stiemerling <mls.ietf@gmail.com>, "rmcat WG (rmcat@ietf.org)" <rmcat@ietf.org>, "'rmcat-chairs@tools.ietf.org'" <rmcat-chairs@tools.ietf.org>
CC: "draft-ietf-rmcat-scream-cc@ietf.org" <draft-ietf-rmcat-scream-cc@ietf.org>
Thread-Topic: Update of draft-ietf-rmcat-scream-cc (was RE: [rmcat] Shepherd review of draft-ietf-rmcat-scream-cc-07)
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Date: Mon, 29 May 2017 15:26:10 +0000
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Subject: [rmcat] Update of draft-ietf-rmcat-scream-cc (was RE: Shepherd review of draft-ietf-rmcat-scream-cc-07)
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Hi With the latest update I believe that the review comments by Martin should be addressed Regards Ingemar ========================= A new version of I-D, draft-ietf-rmcat-scream-cc-09.txt has been successfully submitted by Ingemar Johansson and posted to the IETF repository. Name: draft-ietf-rmcat-scream-cc Revision: 09 Title: Self-Clocked Rate Adaptation for Multimedia Document date: 2017-05-29 Group: rmcat Pages: 36 URL: https://www.ietf.org/internet-drafts/draft-ietf-rmcat-scream-cc-09.txt Status: https://datatracker.ietf.org/doc/draft-ietf-rmcat-scream-cc/ Htmlized: https://tools.ietf.org/html/draft-ietf-rmcat-scream-cc-09 Htmlized: https://datatracker.ietf.org/doc/html/draft-ietf-rmcat-scream-cc-09 Diff: https://www.ietf.org/rfcdiff?url2=draft-ietf-rmcat-scream-cc-09 Abstract: This memo describes a rate adaptation algorithm for conversational media services such as video. The solution conforms to the packet conservation principle and uses a hybrid loss and delay based congestion control algorithm. The algorithm is evaluated over both simulated Internet bottleneck scenarios as well as in a Long Term Evolution (LTE) system simulator and is shown to achieve both low latency and high video throughput in these scenarios. > -----Original Message----- > From: Ingemar Johansson S [mailto:ingemar.s.johansson@ericsson.com] > Sent: den 16 mars 2017 15:37 > To: Martin Stiemerling <mls.ietf@gmail.com>; rmcat WG (rmcat@ietf.org) > <rmcat@ietf.org> > Cc: draft-ietf-rmcat-scream-cc@ietf.org > Subject: RE: [rmcat] Shepherd review of draft-ietf-rmcat-scream-cc-07 > > Hi > > Thanks for the review, comments inline. > > /Ingemar > > > -----Original Message----- > > From: Martin Stiemerling [mailto:mls.ietf@gmail.com] > > Sent: den 15 mars 2017 10:18 > > To: rmcat WG (rmcat@ietf.org) <rmcat@ietf.org> > > Subject: [rmcat] Shepherd review of draft-ietf-rmcat-scream-cc-07 > > > > Dear all, > > > > Please find here the document shepherd review of > > > > Summary: > > Draft is not ready for submitting it to the AD, as it has a few items > > to be checked first which are formal issues and but no technical flaws! > > > > Issues: > > 1) ID nits has a number of issues, noteable these: > > > > a) The copyright year in the IETF Trust and authors Copyright Line > > does not match the current year > > b) The document doesn't use any RFC 2119 keywords, yet has text > > resembling RFC 2119 boilerplate text. > > c) Found something which looks like a code comment -- if you have code > > sections in the document, please surround them with '<CODE BEGINS>' > > and '<CODE ENDS>' lines. > > > > a) is easily fixable, when recompiling the draft > [IJ] OK > > > > > b) This is a bigger issue: > > The draft specifies a number of protocol behaviors, but is never using > > any of the RFC 2119 keywords. While not using the RFC 2119 keywords is > > acceptable for an experimental draft it is troublesome on the long run. > > The intention is for sure to move this draft to standards track, once > > the experimental phase is over. However, at this later stage RFC 2119 > > key words will be required. > [IJ] OK, yes. This can take a few hours to fix, should not be too troublesome, I > hope. I had worse issues with rfc6236 as the RFC2119 keywords had to be > chosen carefully in light of existing SDP and SIP specs. This one should be > more simple, I hope. > > > > > c) a bit of work, but easily fixable. > [IJ] OK > > > > > Other comments beyond idnits: > > > > - Section 4.1.1.1: It says that the constantns are deduced from > experiments. > > In what context have these experiments been specified, carried out and > > documented? Is this something you can refer you? The current text is a > > bit underspecified in that respect. > [IJ] There are experiments results presented at the RMCAT meetings, last > time was in Berlin (https://www.ietf.org/proceedings/96/slides/slides-96- > rmcat-0.pdf ), It is possible that I can present new results soon. Question is in > which form should the results be presented ?. Is material presented at > RMCAT sufficient. > > > > > - Section 4.1.1.1, page 10, bottom: > > " TARGET_BITRATE_MIN > > Min target bitrate [bps]. > > > > TARGET_BITRATE_MAX > > Max target bitrate [bps]. > > " > > > > I assume that the notion [bps] shall introduce the unit of this constant. > > Please specify that this is the notion you are using for specifying the unit. > [IJ] If I understand it correct you mean that I should specify that [bps] > indicate the unit "bits per second", right ? > > > > > > > - Section 9. IANA Considerations: > > This is not section for IANA but more a question for the WG. Please > > remove the text from this section and place it in a new section "Open > > Issues" or similar. There is currently no request to IANA. Please > > state just this and the request to remove the section before publication as > RFC. > [IJ] OK > > > > > - Appendix A.4 looks like a regular section, with the note that this > > is an experimental version and needs further vetting during the > > experimentation period, isn't it? > [IJ] Yes. The proposed feedback while waiting for some kind of generic > feedback, this is the best one can do with existing standardized feedback. > The feedback intensity is verified in simulator over a large range of bitrates, > and also verified in an experimental testbed for a high quality video solution > over LTE/5G. The objective has been to ensure a feedback rate that is not > overly high and that at the same time does not limit throughput. It is not > ruled out that the equations in section A.4.2 may change during the > experimentation period. > > > > > Thanks, > > > > Martin > >
- [rmcat] Update of draft-ietf-rmcat-scream-cc (was… Ingemar Johansson S