Re: [icnrg] I-D Action: draft-irtf-icnrg-videostreaming-03.txt

[Niall Murray <[e-mail]>]

Hello All,
Some comments on the draft as follows:

pg5: Use Case - mentions QoE - since this document is likely to be read by
a broad audience from different areas I think the definition of QoE (from
Qualinet) should be included to give context (if not, at least referenced).
I also think it would help if this aspect was brought forward to the
introduction. It is referred to throughout the document, the aim of this
document (I imagine) is to support these the various scenarios with
enhanced QoE.

My key point is wrt synchronization - intra - inter - and inter
destination. This was touched on by another reviewer but based on the
scenarios outlined, how is synchronized delivery maintained across the
various scenarios- this issue is intimated in a number of places throughout
the document e.g. pg 9 "the support for potentially multiple sources", pg
11 "synch of multiple content streams" (I think this should be clarified to
include intra - for layers of the same video or audio stream and also inter
- synch between audio - audio. Based on evolving ICN structure this problem
will become more complex than for existing end-to-end system. In addition
an additional issue for video conferencing in the form of inter destination
synch exists, not to mention the nice mass-media distribution scenario.

To conclude, I would like to see an additional Future steps for ICN
(section 9) to include synchronization (the requirements of which will be
different based on application or scenario). Maybe the authors feel that
this aspect demands an ID itself and hence the reason for its omission? If
this is the case, I think this should be stated.

There are a number of typos in the document but I guess these can be
addressed in a later version.

Some other comments on network coding etc are discussed already.


I think the document is nicely structured and the flow makes sense to me.
Its presentation is very timely.

Kind Rgs
Niall Murra



On 25 February 2015 at 20:38, <[e-mail]> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Information-Centric Networking Working
> Group of the IETF.
>
>         Title           : Adaptive Video Streaming over ICN
>         Authors         : Stefan Lederer
>                           Cedric Westphal
>                           Christopher Mueller
>                           Andrea Detti
>                           Daniel Corujo
>                           Christian Timmerer
>                           Daniel Posch
>                           Aytac Azgin
>                           Sucheng Liu
>         Filename        : draft-irtf-icnrg-videostreaming-03.txt
>         Pages           : 37
>         Date            : 2015-02-25
>
> Abstract:
>    This document considers the consequences of moving the underlying
>    network architecture to an Information-Centric Network (ICN)
>    architecture on video distribution. As most of the traffic in future
>    networks is expected to be video, we consider how to modify the
>    existing video streaming mechanisms. Several important topics
>    related to video distribution over ICN are presented, covering a
>    wide range of scenarios: we look at how to evolve DASH to work over
>    ICN, and leverage the recent ISO/IEC MPEG Dynamic Adaptive Streaming
>    over HTTP (DASH) standard; we consider layered encoding over ICN;
>    P2P mechanisms introduce distinct requirements for video and we look
>    at how to adapt PPSP for ICN; IPTV adds delay constraints, and this
>    will create more stringent requirements over ICN as well. As part of
>    the discussion on video, we discuss DRMs in ICN. Finally, in
>    addition to consider how existing mechanisms would be impacted by
>    ICN, this document lists some research issues to design ICN specific
>    video streaming mechanisms.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-irtf-icnrg-videostreaming/
>
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-irtf-icnrg-videostreaming-03
>
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-irtf-icnrg-videostreaming-03
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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