UDM Notification Interaction Call Flow

The UE Configuration Update command is also triggered when UDM notifies AMF about change in subscription data.

This section describes the UDM Notification Interaction call flow.

UDM Notification Interaction Call Flow
UDM Notification Interaction Call Flow Description

Step

Description

1

UDM notifies the subscription data change to AMF.

Note

In this release, AMF only supports detection of changes to SMS subscription data as a part of UDM Data change notification.

2

As a response, the AMF acknowledges the change.

3

AMF compares new subscription data with the existing data. If any change is detected and:

  • If UE is in CONNECTED mode, AMF triggers UE Configuration Update Command to UE.

  • If UE is in IDLE mode, AMF triggers paging based on the configuration. Post paging response from UE, AMF may trigger UE Configuration Update command.

4

UE sends UE Configuration Update Complete to AMF.