Re: [Sipping] ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: Closing the offer/answer rollback issue

["Christer Holmberg" <christer.holmberg at ericsson.com>]



Hi,

>I think , the additional re-INVITE will solve the problem 
>But as UE-B has rejected the re-INVITE obviously by 4xx,  he/she doesn't need to send the addtional re-INVITE.  

 

Well, THAT is the main issue we are discussion now, isn't it? Ie does the re-INVITE error response have an impact on the negotiated SDP (with preconditions met) or not.

 

Regards,

 

Christer

 
 

  

"Christer Holmberg" <christer.holmberg at ericsson.com>

2009-02-27 17:31

收件人	<wang.libo at zte.com.cn>, "Gonzalo Camarillo" <gonzalo.camarillo at ericsson.com>
抄送	<gao.yang2 at zte.com.cn>, <sipping at ietf.org>, <sipping-bounces at ietf.org>
主题	RE: Re: ??: Re: [Sipping] ??: Re:  ??: Re: ??: Re: ??: Re: ??: Re: ??: Re:  Closing the offer/answer rollback issue

Hi, 
  
If preconditions are met for the video stream, but UE-B then 
decideds that he doesn't want to video, an alternative to "late commitment" is 
for UE-B to send a new re-INVITE/offer to UE-A and remove the video. 
  
Regards, 
  
Christer

---

From: wang.libo at zte.com.cn 
[mailto:wang.libo at zte.com.cn] 
Sent: Friday, February 27, 2009 11:25 
AM
To: Gonzalo Camarillo
Cc: Christer Holmberg; 
gao.yang2 at zte.com.cn; sipping at ietf.org; 
sipping-bounces at ietf.org
Subject: 答复: Re: ??: Re: [Sipping] ??: Re: 
??: Re: ??: Re: ??: Re: ??: Re: ??: Re: Closing the offer/answer rollback 
issue


Hi 
Gonzalo Camarillo, 

 If UE-A wants to communicate with UE-B by video, but UE-B only 
want to communicate by audio. 
and if they uses the new SDP, when pre-conditions met, UE-B will send 
his/her videos regardless 
of UE-B's willing. 
 And if UE-B never send his video although the pre-conditions 
are met, then UE-A will be puzzled why 
he/she is charged for vedio while 
receiving NO vedio from UE-B. 

 I think this is a operational problem that we 
have to solve too. 

regards, 
Eric

Gonzalo Camarillo <Gonzalo.Camarillo at ericsson.com>

2009-02-27 17:10

收件人	wang.libo at zte.com.cn
抄送	christer.holmberg at ericsson.com, gao.yang2 at zte.com.cn, sipping at ietf.org, sipping-bounces at ietf.org
主题	Re: ??: Re: [Sipping] ??: Re:  ??: Re: ??: Re: ??: Re: ??: Re: ??: Re:  Closing the offer/answer rollback issue

Hi,

> Also If 
pre-conditions are met,and re-INVITE fails, UEs could use the 
> new 
SDP.
> This solution will give someone a way to escape charging. 
 
> For example, if UEs use audio at the first time,
> then one 
of them raise a re-INVITE with a SDP carrying both audio and 
> 
video,
> after the preconditions are met, then the other rejects the 
re-INVITE,
> but they can communicate with both audio and video after 
all.

No, if they negotiate video and the preconditions are met, they will 
be 
charged for video, regardless of what happens with the 
re-INVITE.

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.