back to TS 24.228
- This example describes the notification of a UE that occurs when the S-CSCF assigned to that user requests re-authentication.
- It is assumed that user has registered and also subscribed to the registration state event before.
- After this procedure the user's UE might automatically initiate re-registration procedures. If the user fails to re-register, the public user identity may be deregistered by S-CSCF.
- The network initiated re-authentication event for the private user identity of the user occurs at the S-CSCF. As the user has subscribed to the registration state event package this is the trigger point for the S-CSCF to notify the user about the event occurrence. For simplicity, the NOTIFY request towards the P-CSCF is not shown.