I am not sure media synchronization you mentioned is the same as I talked.
I said two:
1. some precondition case, UAC and UAS can have inconsistent session state.
2. we let the session state user rejected alone, and can be illegal used.
And I really want to know why solution in my draft without considering. It is on January 8, 2009
| Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx>
2009-02-27 18:38 |
|
Hi,
at this point, the discussions are going in circles and are not
productive any longer. No new ideas are being introduced.
I think I now understand your main points (media synchronization and
session continuity) so that I can put together a more formal description
of the straw-man proposal in my original email that meets all the
requirements brought up here.
The proposal will be what the WG had agreed on before with slight
modifications (e.g., a clarification of the "in use" concept) in order
to better address your concerns.
Thanks for your input,
Gonzalo
gao.yang2@xxxxxxxxxx wrote:
>
> Yes. I think it is can, not MUST.
>
> And with precondition, the user can be hinted the new modification just
> after Offer/Answer pairs.
>
>
>
>
> *Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx>*
>
> 2009-02-27 18:22
>
>
> 收件人
> wang.libo@xxxxxxxxxx
> 抄送
> christer.holmberg@xxxxxxxxxxxx, gao.yang2@xxxxxxxxxx, sipping@xxxxxxxx,
> sipping-bounces@xxxxxxxx, Eric.wangxr@xxxxxxxxx
> 主题
> Re: 答复: Re: 答复: Re: ??: Re: [Sipping] ??: Re: ??: Re: ??: Re: ??:
> Re: ??: Re: ??: Re: Closing the offer/answer rollback issue
>
>
>
>
>
>
>
>
> Hi,
>
> UEB would have rejected the video stream in the 183 response.
>
> Gonzalo
>
> wang.libo@xxxxxxxxxx wrote:
> >
> > HI,
> >
> > I think the video will be established.The figure below shows the case.
> >
> >
> > 1. REINVITE(audio，vedio)
> > ----------------------------->
> > 2. 183
> > <-----------------------------
> > 3. PRACK/200
> > <------------------------------>
> > 4. UPDATE(audio，vedio)
> > ----------------------------->
> > 5. 200(audio，vedio)
> > <-----------------------------
> >
> > 6. 4XX
> > <-----------------------------
> >
> > After step 5, UEs' precondition are met ,and the video stream is
> > established too.
> > But UE-B send 4xx to reject 4XX (step 6).
> >
> > Regards.
> >
> >
> >
> >
> > *Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx>*
> >
> > 2009-02-27 17:30
> >
> >
> > 收件人
> > wang.libo@xxxxxxxxxx
> > 抄送
> > christer.holmberg@xxxxxxxxxxxx,
> gao.yang2@xxxxxxxxxx, sipping@xxxxxxxx,
> > sipping-bounces@xxxxxxxx
> > 主题
> > Re: 答复: Re: ??: Re: [Sipping] ??: Re: ??: Re: ??:
> Re: ??: Re: ??:
> > Re: ??: Re: Closing the offer/answer rollback issue
> >
> >
> >
> >
> >
> >
> >
> >
> > Hi,
> >
> > > If UE-A wants to communicate with UE-B by video, but UE-B only
> want to
> > > communicate by audio.
> >
> > then UE-B rejects the video stream and the video stream is never
> > established.
> >
> > Cheers,
> >
> > Gonzalo
> >
> >
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