It's a valid IMS scenario. In IMS there can be one AoR mapped to many contacts. S-CSCF can fork initial INVITE to a number of UAS (different contact) depending on the service profile. This forking can be parallel or sequential depending on the local policy and service profile.
Thanks, Dushyant P S Dhalia -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bogdan-Andrei Iancu Sent: Sunday, May 10, 2009 4:20 PM To: Damir Reic Cc: [email protected] Subject: Re: [Sip-implementors] Forking to AOR Hi Damir, A proxy can fork an initial INVITE based on whatever logic, to whatever destination - the forking mechanism is not necessary related to registration (multiple devices registered with the same account). Forking is used only for initial request (when establishing the dialog) in order to try multiple locations for finding a callee to pick up the call (callee discovery)). After the call is setup (200 OK), for the sequential requests there will be no forking as the dialog path and parties are known and there is no need for any discovery. Regards, Bogdan Damir Reic wrote: > Hi all, > > I have a question regarding forking mechanism. > Is it possible that a proxy forks a request to an AOR? I believe it would > imply that a proxy forks a request to two different proxies which would end > up with loop detection on UAS side. So forking is done only in proxies that > have user contacts stored in it's location service? So non-INVITE requests, > which are sent within a dialog (early or confirmed) will never fork? > Now, if I got it all right, from UAC perspective, when it sends an initial > INVITE to a user that has n contacts stored in it's proxies LS it is > possible that most n early dialogs will be created, probably with the same > route-set, but sure different remote target? > Thanks for any clarification. > > regards, > Damir > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
