IMS distinguishes registration in two methodology. 1) Implicit Public Registrations 2) Explici Public Registrations
In the first case, all the publics that are associated with the private are implicitly registered, this is provisioned through S-CSCF policies or through HSS policies. IN this case, only one of the public can be used to register. In the second case, user registers explicitly each public. In this case, user registers one public (Say A) using CallID X. He can send another register with the same private and same CallId X and register the second one (Say B). There is no co-relation between Public's, private and Call Id, Call Id is used to know whether the UE had a new boot cycle (As Call Id remains the same for a boot cycle). The S-CSCF doesn't keep track of the Call Ids but the identities that got registered (through SAR, SAA) -Dutt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sigrid Thijs Sent: Thursday, February 22, 2007 6:15 AM To: [email protected] Subject: [Sip-implementors] registration of multiple public user identities Hi, in IMS there's a lot spoken about having multiple public user identities for a single private user identity. I was wondering what should happen when one single UE wants to register two public user identities for the same private user identity. I cannot find information about this in the IMS documentation, so please direct me to it, if there exists some. I think for each public identity, a REGISTER request should be sent. The To and From header of the REGISTER request should contain the public identity to be registered. But what about the Call-ID? According to RFC 3261, section 10.2 Constructing the REGISTER Request, all registrations from a UAC should use the same Call-ID header field value for registrations sent to a particular registrar. Does this apply to REGISTER requests for the same public identity or to *all* REGISTER requests sent from the UE? kind regards, Sigrid _______________________________________________ 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
