Re: [Ecrit] Ivo's review of draft-ietf-ecrit-ecall-15 - ISSUE 7

Ivo Sedlacek <ivo.sedlacek@ericsson.com> Mon, 31 October 2016 07:04 UTC

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From: Ivo Sedlacek <ivo.sedlacek@ericsson.com>
To: Randall Gellens <rg+ietf@randy.pensive.org>, "ecrit@ietf.org" <ecrit@ietf.org>
Thread-Topic: [Ecrit] Ivo's review of draft-ietf-ecrit-ecall-15 - ISSUE 7
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Date: Mon, 31 Oct 2016 07:04:20 +0000
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Subject: Re: [Ecrit] Ivo's review of draft-ietf-ecrit-ecall-15 - ISSUE 7
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Hello,


> >   > >>  >  ISSUE 7
> >   > >>  >
> >   > >>  >  section 6 - "The IVS then attaches an updated MSD to a SIP
> >   > >>  >     INFO request and sends it within the dialog." - what is meant by
> >   > >>  > "attaching MSD to SIP INFO request"?
> >   > >>
> >   > >>  I think that's made abundantly clear in the multiple earlier
> >   > >> instances in the  same section that say "as a MIME body part".
> >   > >
> >   > >  I do not really know what "attach body to SIP request"  means.
> >   > > Likely, other readers will not know it either.
> >   > >
> >   > >  A reference to a section defining how to "attach body to SIP request"
> >   > > would help.
> >   >
> >   > It's the same section, just a little bit before.
> >
> >  I assume you refer -19 text stating: "[RFC7852] establishes a general 
> > mechanism for attaching blocks of
> >     data to a SIP emergency call."
> 
> If you look seven paragraphs above the paragraph in question (same section), 
> you'll see:
> 
>     A PSAP or IVS transmits a metadata/control object (see Section 9) by
>     encoding it per the description in this document and attaching it to
>     a SIP message as a MIME body part per [RFC7852].
> 
> Then, three paragraphs later (four paragraphs above the paragraph in
> question) it uses "attach" again:
> 
>     An In-Vehicle System (IVS) initiating an NG-eCall attaches an MSD to
>     the initial INVITE and optionally attaches a metadata/control object
>     informing the PSAP of its capabilities.
> 
> The surrounding text makes it clear that these are "attached" as body parts 
> in the SIP message.

The above still talks about "attaching"/"attaches" without explaining what it means.

It can be easily misunderstood to refer to inclusion of a body part with Content-Disposition "attachment" in a SIP message.

Kind regards

Ivo