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? Zongjun 2008/4/24, Vijay K. Gurbani <[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 > of the above draft for some insight. > > Ëï×Ú¾ý 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],bell-labs.com,acm.org} > WWW: http://www.alcatel-lucent.com/bell-labs > _______________________________________________ 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
