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Re: [Sip] [Sipping] One chart //"UPDATE during Re-INVITE" discussion

 
Hi,
 
I have same thought about it as yours.
 
But in Ganzalo's draft, the new dialog state MUST be discarded by 4xx of Re-INVITE.

The main branching is about the relationship of Re-INVITE and UPDATE. I have seen your supporting of view 2. Abd we need more people to show their standpoint.
 
Gao
 
From: brett at broadsoft.com
To: gao.yang2 at zte.com.cn; sip at ietf.org; sipping at ietf.org
Date: Thu, 12 Mar 2009 04:57:06 -0700
Subject: Re: [Sipping] [Sip] One chart //"UPDATE during Re-INVITE" discussion

Data (like Contact, Session-Expires, and etcetera) that was successfully updated by F3/F4 still apply after F7.  Thus F8 data should reflect (and can attempt to modify) adjustments made during F3/F4.

 

 

From: sip-bounces at ietf.org [mailto:sip-bounces at ietf.org] On Behalf Of gao.yang2 at zte.com.cn
Sent: Wednesday, March 11, 2009 11:47 PM
To: SIP; SIPPING
Cc: Gonzalo Camarillo; Christer Holmberg
Subject: [Sip] One chart //"UPDATE during Re-INVITE" discussion

 


      UAC                   UAS
       | session established |
       |<===================>|
       |                     |
       | F1  re-INVITE (SDP) |
       |-------------------->|
&nbs p;      | F2 1xx-rel (SDP)    |
       |<--------------------|
       | F3   UPDATE         |
       |<--------------------| Target refreshing
       | F4 2xx UPT          |
       |-------------------->|
       |                     |
       | F5/6 Cancel/200OK   |
       |-------------------->|
       | F7    487 INV       |
       |<--------------------|
       | F7     ACK          |
       |-------------------->|
       | F8  re-INVITE (SDP) |
       |-------------------->| Using which dialog state

F3/F4 is about target refreshing.

And if UAC sends Cancel， UAS sends 487. The first Re-INVITE is discarded.

But if UAC sends another Re-INVITE, which dialog state should it use?

I think is the one refreshed by F3. That's the merit of regarding UPDATE/200OK's atomicity. 

 

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