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

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

Hi, 

	
>Explanation for Precondition notification 
>	
>Precondition notification can be treated as part of the original modification triggered by Re-INVITE. 
>	
>And only SDP with Precondition notification and without any other modification of session, during suspending state of session 
>modification, is called precondition notification. 

So, what if I e.g. Also do a "codec refine" inside a precondition notficiation?

Regards,

Christer












	OKUMURA Shinji <shin at softfront.co.jp> 

	2009-03-02 17:43 

		
		收件人
		sipping <sipping at ietf.org> 
		抄送
		"Christer Holmberg" <christer.holmberg at ericsson.com>, gao.yang2 at zte.com.cn, Gonzalo Camarillo <gonzalo.camarillo at ericsson.com> 
		主题
		Re: [Sipping] Summary of Closing the offer/answer rollback issue?

		




	Hi,
	
	The following table describes my understanding.
	Is this right?
	
	signaling            | O/A state                      | media in use
	---------------------+--------------------------------+--------------
	init-INVITE/200/ACK  | audio1(met)                    | audio1
	re-INVITE/183-rel    | audio2(notmet)                 | audio1
	(PRACK/200OK)        | audio2(met)    +video1(notmet) | audio2
	UPDATE/200OK         | audio2(met)    +video1(met)    | audio2+video1
	UPDATE/200OK         | audio2(met)    +video2(notmet) | audio2+video1
	4xx/ACK              |                                |
	 Gonzalo's proposal | audio2         +video1         |
	 Gao's proposal     | audio1         +video1(?)      |
	
	
	Regards,
	Shinji
	
	
	
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