Hi, >1. >In "draft-ietf-sipping-sip-offeranswer-08.txt ", there is a use case: >The case of >adding a new media (like adding video to audio only session) which >requires permission from the peer through some user interaction is >one example. >From the user's viewpoint, he(or she) just reject the modification of session, so >the offer/answer should be rollback. >So, "any session>parameters that have been sucessfully changed during the duration of>the re-INVITE transaction MUST remain unchanged" is not reasonable for all >application use case. We have agreed that we cannot define different rules for different use-cases. We need to have a generic rule, and implementors shall then use that. There was a long discussion on which solution to go for, and the text now reflects the agreed solution (which we also informed 3GPP about). Regards, Christer 2. There are nested transactions concept in application level above of offer/answer which use a offer/answer pair as a sub-transaction. So, commit/rollback is not just offer/answer issue, it is a application issue(such as precondition may have more than one offer/answer pairs).And application level usage of offer/answer should be open for the future extension. 3. I just submitted a draft talking about session state 2009-01-08: https://datatracker.ietf.org/idst/status.cgi?submission_id=11690 the document URL: http://www.ietf.org/proceedings/staging/draft-gaoyang-sipping-session-state-criterion-00.txt (the URL "http://www.ietf.org/proceedings/staging/draft-gaoyang-sipping-session-state-criterion-01.txt"; is not available, but the 00.txt is the current one) "Christer Holmberg" <christer.holmberg@xxxxxxxxxxxx> 发件人: sipping-bounces@xxxxxxxx 2009-01-09 17:32 收件人 "sipping LIST" <sipping@xxxxxxxx> 抄送 主题 Draft: Essential correction for re-INVITE rollback in RFC3261 Hi, I've put together the first version of the draft related to the re-INVITE follback fix, based on the agreed solution. I had some problems with the IETF submission tool, but the draft can be found at: http://users.piuha.net/cholmber/drafts/draft-holmberg-sipping-reinvite-rollback-00.txt <http://users.piuha.net/cholmber/drafts/draft-holmberg-sipping-reinvite-rollback-00.txt> Regards, Christer _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP -------------------------------------------------------- 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
