Re: [ipwave] Mirja Kühlewind's Discuss on draft-ietf-ipwave-ipv6-over-80211ocb-49: (with DISCUSS and COMMENT)

[John Kenney <[e-mail]>]

Hi All:

I have no desire to re-litigate the QoS issue. However, it's important to
remember that IP-over-OCB will typically share public regulated spectrum
with non-IP safety-of-life communications. In the US, FCC regulations
require that such safety communications have access priority over other
communications [47 CFR § 90.377(d)] .  I would be cautious about removing
the current language unless you are convinced that doing so will not
adversely affect non-IP safety communications.

Best Regards,
John

On Wed, Jul 10, 2019 at 6:18 AM Mirja Kuehlewind <[e-mail]>
wrote:

> Thanks. Removing this text entirely is a good option.
>
> Mirja
>
>
> > On 10. Jul 2019, at 13:39, Nabil Benamar <[e-mail]>
> wrote:
> >
> > Hi Mirja,
> >
> > Actually, the text was written some time ago and different views were
> shared in the group. I think we need to remove this text to avoid confusion.
> >
> > On Wed, Jul 10, 2019 at 8:44 AM Mirja Kuehlewind <[e-mail]>
> wrote:
> > Hi Nabil,
> >
> > I think my point was slightly different. Dorothy mainly advised you
> _how_ to specify the priority. However my question is rather _if_ that is
> needed and if it is really appropriate to use a MUST here. Can you further
> explain why that is seen as a mandatory requirement?
> >
> > Mirja
> >
> >
> >
> > > On 9. Jul 2019, at 23:29, Nabil Benamar <[e-mail]>
> wrote:
> > >
> > > Hi Mirja,
> > >
> > > Thank you for your review and comments.
> > >
> > > You raised a very important point that was discussed extensively on
> the ML and then we asked the IEEE 802.11 members (thanks to Dorothy Stanly)
> to provide us with a review to help us clarify this point.
> > >
> > > Here is what we got from them:
> > >
> > > .  Suggest to simply state that the data is transmitted with “User
> Priority” of Background (numerically 1 or 2), and leave the internal
> details of how this is accomplished to the 802.11 specification.
> > >
> > > User Priority is typically described as a simple integer (not a binary
> value), and the mapping of this User Priority to TID header value is
> another 802.11 detail, best left to the 802.11 specification.  For example:
> in the 802.11 specification the TID field is specified to be 4 bits in the
> header.  The use of these 4 bits to carry the User Priority information is
> an internal specification of 802.11 and potentially subject to change..
> > >
> > > Suggest using terminology from the MAC SAP in IEEE Std 802.11-2016
> Clause 5.2.  This clause intentionally abstracts the exact details of
> 802..11’s internal operation, while describing specifically the behavior
> required by the user.  For example, the following text:
> > >
> > > “In the 802.11 header, the value of the Subtype sub-field in the Frame
> Control field MUST be set to 8 (i.e. 'QoS Data'); the value of the Traffic
> Identifier (TID) sub-field of the QoS Control field of the 802.11 header
> MUST be set to binary 001 (i.e.  User Priority 'Background', QoS Access
> Category 'AC_BK').”
> > >
> > > could be replaced by:
> > >
> > >
> > > “The mapping to the 802.11 data service MUST use a ‘priority’ value of
> 1, which specifies the use of QoS with a “Background” user priority.”
> > >
> > >
> > >
> > > Thanks again.
> > >
> > >
> > > On Tue, Jul 9, 2019 at 5:43 PM Mirja Kühlewind via Datatracker <
> [e-mail]> wrote:
> > > Mirja Kühlewind has entered the following ballot position for
> > > draft-ietf-ipwave-ipv6-over-80211ocb-49: Discuss
> > >
> > > When responding, please keep the subject line intact and reply to all
> > > email addresses included in the To and CC lines. (Feel free to cut this
> > > introductory paragraph, however.)
> > >
> > >
> > > Please refer to
> https://www.ietf.org/iesg/statement/discuss-criteria.html
> > > for more information about IESG DISCUSS and COMMENT positions.
> > >
> > >
> > > The document, along with other ballot positions, can be found here:
> > > https://datatracker.ietf.org/doc/draft-ietf-ipwave-ipv6-over-80211ocb/
> > >
> > >
> > >
> > > ----------------------------------------------------------------------
> > > DISCUSS:
> > > ----------------------------------------------------------------------
> > >
> > > One point on this sentence, which I believe was also commented in the
> TSV-ART
> > > review (Thanks Jörg!):
> > >
> > > sec 4.2: "The mapping to the 802.11 data service MUST use a
> > >    'priority' value of 1, which specifies the use of QoS with a
> > >    'Background' user priority."
> > > I don't think this should be a MUST requirement. I assume the
> assumption here
> > > is that IP traffic is always some "random" data that is less important
> than
> > > other V2V communication. However, this is a generic mapping document
> and should
> > > therefore probably not make such an assumption (or at least it would
> need to be
> > > spelled out).
> > >
> > >
> > > ----------------------------------------------------------------------
> > > COMMENT:
> > > ----------------------------------------------------------------------
> > >
> > > One editorial high level comment: I seams like all text that was
> somehow deemed
> > > as out fo scope for the main body of this document got stuffed into the
> > > appendix. Please consider removing what is really not needed in this
> document
> > > as these pages also take review and RFC Editor time, especially as
> they seem to
> > > have received less review and therefore have more nits.
> > >
> > > nit: sec 4.5.2 s/in OCB mode.A  A future improvement/in OCB mode. A
> future
> > > improvement/
> > >
> > >
> > >
> > >
> > > --
> > >
> > > Best Regards
> > >
> > > Nabil Benamar
> > > Associate Professor
> > > Department of Computer Sciences
> > > School of Technology
> > > Moulay Ismail University
> > > Meknes. Morocco
> > >
> > >
> >
> >
> >
> > --
> >
> > Best Regards
> >
> > Nabil Benamar
> > Associate Professor
> > Department of Computer Sciences
> > School of Technology
> > Moulay Ismail University
> > Meknes. Morocco
> >
> >
>
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-- 
John Kenney
Director and Sr. Principal Researcher
Toyota InfoTech Labs
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