Do u mean, Dialog is at signaling level, session is at media transport level.
On Fri, Apr 25, 2008 at 5:44 PM, gaurav katiyar <[EMAIL PROTECTED]> wrote: > Sip "Session Initiation Protocol". It talks about media session, i mean how > to initiate, modify and terminate a session and Dialog provides a sort of > context (like caller, callee, location, routing etc.) to modify this > session. So dialog is more related to route the sip message to right node > and body (SDP) handles media session if present. Dialogs may have media > sessions Or may not. > > Take an example of B2BUA. It is a type of statefull proxy having two dialog > and one media session if doing media routing. > > > *Donald Lee <[EMAIL PROTECTED]>* wrote: > > old good questions in sip, also add another "transaction". > > > On Fri, Apr 25, 2008 at 8:18 AM, å™å(R)—å › <[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? >> >> 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 >> > > > > -- > BR > Donald _______________________________________________ > This is the SIP Forum discussion mailing list > TO UNSUBSCRIBE, or edit your delivery options, please visit > http://sipforum.org/mailman/listinfo/discussion > Post to the list at [EMAIL PROTECTED] > > > > > Gaurav Katiyar > Induslogic india pvt. ltd > B-34/1 sector 59 NOIDA > Phone:9818381368 > > > ------------------------------ > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it > now.<http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ> > > _______________________________________________ > This is the SIP Forum discussion mailing list > TO UNSUBSCRIBE, or edit your delivery options, please visit > http://sipforum.org/mailman/listinfo/discussion > Post to the list at [EMAIL PROTECTED] > > -- -Raaz
_______________________________________________ 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
