At 04:44 AM 4/25/2008, Donald Lee wrote: >old good questions in sip, also add another "transaction". > > >On Fri, Apr 25, 2008 at 8:18 AM, åå®å ><<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]> wrote: >Hi, Vijay > >Thanks very much for your timely answers. > > From this specification, session is a combination of signaling plane >and media plane messages and processes that enable two or more >participants to communicate. I think session is a larger scope than >dialog. In another word, one session can contain more than one dialog. >Is what I understand right?
A SIP dialog has the one Call-ID. If more than one session is involved in the same Call-ID, then more than one session is within the same dialog. At issue, I think, is there is little tying any particular SDP session to a particular SIP Call-ID. This creates confusion telling the difference between the two. >Zongjun > > >2008/4/24, Vijay K. Gurbani ><<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]>: > > There is some work progressing in the BMWG WG to create performance > > metrics around SIP. One of the first tasks in such an endeavor > > is to define the notion of dialogs and sessions. Please see > > Section 3.1.1 of > > > <https://svn.resiprocate.org/rep/ietf-drafts/gurbani/bmwg-sip-bench-term/draft-ietf-bmwg-sip-term-00.txt>https://svn.resiprocate.org/rep/ietf-drafts/gurbani/bmwg-sip-bench-term/draft-ietf-bmwg-sip-term-00.txt > > of the above draft for some insight. > > > > ÃïÃþý wrote: > > > > > Hi, Lincoln > > > > > > thanks for your instructions. > > > > > > I know that dialog can exist without session since SUBSCRIBE/REFER can > > > create dialog and without any media between communication peers. > > > > > > What I want to know is the relationship of dialog and session when > > > they both exist in one communication activity. Take a example, when > > > there are 2 person participating talks with voice, we say there is a > > > dialog and a session. > > > > > > But when one caller invites another callee and gets five 200 final > > > responses from 5 UA every of which has its own session description. We > > > can say that there are 5 dialogs between caller and the other 5 > > > callees, right? And then what is the exact number of session in this > > > scenario? One session or five session? That is what I want to know. > > > > > > Dialog is determined by dialogID (call-id, from/to tag) and session id > > > is determined by session id given in the SDP message. My answer is > > > there are 5 dialog and one session now, right? > > > > > > > - vijay > > -- > > Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent > > 2701 Lucent Lane, Rm. 9F-546, Lisle, Illinois 60532 (USA) > > Email: > [EMAIL > PROTECTED]<http://alcatel-lucent.com>alcatel-lucent.com,<http://bell-labs.com>bell-labs.com,<http://acm.org>acm.org} > > WWW: > <http://www.alcatel-lucent.com/bell-labs>http://www.alcatel-lucent.com/bell-labs > > >_______________________________________________ >Sip mailing >list ><https://www.ietf.org/mailman/listinfo/sip>https://www.ietf.org/mailman/listinfo/sip >This list is for NEW development of the core SIP Protocol >Use ><mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED] >for questions on current sip >Use <mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED] >for new developments on the application of sip > > > > >-- >BR >Donald >_______________________________________________ >Sip mailing list https://www.ietf.org/mailman/listinfo/sip >This list is for NEW development of the core SIP Protocol >Use [EMAIL PROTECTED] for questions on current sip >Use [EMAIL PROTECTED] for new developments on the application of sip _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
