Re: Comments on draft - draft-ietf-sipping-sip-offeranswer-04.txt
Takuya Sawada <tu-sawada <at> kddi.com>
2007-12-03 04:47:37 GMT
Looks fine with me, too.
> The modifications looks fine with me.
> Nataraju A B
> > -----Original Message-----
> > From: Paul Kyzivat [mailto:pkyzivat <at> cisco.com]
> > Sent: Friday, November 30, 2007 8:55 PM
> > To: Nataraju Alilughatta basavaraju (WT01 - TES-Mobility &
> > Carrier Infrastructure)
> > Cc: tu-sawada <at> kddi.com; sipping <at> ietf.org
> > Subject: Re: Comments on draft -
> > draft-ietf-sipping-sip-offeranswer-04.txt
> > nataraju.basavaraju <at> wipro.com wrote:
> > >> "Note that an offer/answer exchange initiated by an INVITE
> > request
> > >> must follow exactly one of the patterns 1, 2, 3, 4.
> > >> <snip>
> > >> Pattern 2 and pattern 4 can occur only when the INVITE
> > request does
> > >> not include an offer. 'The first reliable non-failure
> > message' must
> > >> have an offer if there is no offer in the INVITE request.
> > This means
> > >> that UA which receives the INVITE request without an offer must
> > >> include an offer in the first reliable response with 100rel
> > >> extension. If no reliable provisional response has been
> > sent, the UAS
> > >> must include an offer when sending 2xx response."
> > >>
> > >
> > > The complete paragraph makes sense, but I still think 1st sentence
> > > does confuse. Particularly the word ***AND*** confuses even though
> > > subsequent sentences makes the complete logic clear.
> > > I was thinking changing the phrase from "Pattern 2 AND
> > pattern 4" to
> > > "Pattern 2 OR pattern 4" makes it clear enough.
> > >
> > > If I am still confusing you, you can ignore this comment since the
> > > complete paragraph makes it clear about delayed O/A.
> > I get your point but the paragraph seems a little awkward to
> > me that way. What about:
> > Note that an offer/answer exchange initiated by an INVITE request
> > must follow exactly one of the patterns 1, 2, 3, 4. When
> > an initial
> > INVITE causes multiple dialogs due to forking, an offer/answer
> > exchange is carried out independently in each distinct dialog.
> > When an INVITE request contains no offer, only pattern 2 or
> > pattern 4 apply. 'The first reliable non-failure message' must
> > have an offer if there is no offer in the INVITE request.
> > This means
> > that UA which receives the INVITE request without an offer must
> > include an offer in the first reliable response with 100rel
> > extension. If no reliable provisional response has been
> > sent, the UAS
> > must include an offer when sending 2xx response.
> > This only changes the ordering of the words, but it makes it
> > more consistent with the earlier part of the paragraph and
> > seems slightly clearer to me.
> [ABN] This looks fine with me... At least no confusion...:)
> > Paul
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