Hi, at this point, the discussions are going in circles and are notproductive any longer. No new ideas are being introduced. I think I now understand your main points (media synchronization andsession continuity) so that I can put together a more formal descriptionof the straw-man proposal in my original email that meets all therequirements brought up here. The proposal will be what the WG had agreed on before with slightmodifications (e.g., a clarification of the "in use" concept) in orderto 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: ??: 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> >> >> > --------------------------------------------------------> > ZTE Information Security Notice: The information contained in this > mail is solely property of the sender's organization. This mail > communication is confidential. Recipients named above are obligated to > maintain secrecy and are not permitted to disclose the contents of this > communication to others.> > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this email in error please notify the > originator of the message. Any views expressed in this message are those > of the individual sender.> > This message has been scanned for viruses and Spam by ZTE Anti-Spam > system.> > > > --------------------------------------------------------> ZTE Information Security Notice: The information contained in this mail is solely property of the sender's organization. This mail communication is confidential. Recipients named above are obligated to maintain secrecy and are not permitted to disclose the contents of this communication to others.> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. Any views expressed in this message are those of the individual sender.> This message has been scanned for viruses and Spam by ZTE Anti-Spam system. _______________________________________________Sipping mailing list https://www.ietf.org/mailman/listinfo/sippingThis list is for NEW development of the application of SIPUse sip-implementors@xxxxxxxxxxxxxxx for questions on current sipUse sip@xxxxxxxx for new developments of core SIP
