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
