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| Applicable Product(s) or Functional Area | SMF |
| Applicable Platform(s) | SMI |
| Feature Default Setting | Disabled – Configuration Required |
| Related Changes in this Release | Not Applicable |
| Related Documentation | Not Applicable |
| Revision Details | Release |
|---|---|
| First introduced. | 2020.03.0 |
The SMF introduces new RAT type configuration options with the existing configuration authorization local in the DNN profile. With this optional configuration, the SMF stops the Subscription Data Management (SDM) messages from sending over N10 interface towards Unified Data Management (UDM).
This feature works with the customized RAT-type configuration in the DNN profile configuration.
When the SMF skips UDM subscription, then it stops sending Fetch-Subscription and Subscribe-for-Notification during session establishment.
When the SMF skips the UDM subscription, then it stops sending Unsubscribe-to-Notification during session release. The SMF sends Unsubscribe-to-Notification only when the UDM receives the UECM messages.
The SMF supports dynamic change for UDM subscription skip configuration. That is, new configuration is applicable for the new session getting established. The existing sessions continue as per the old behavior of configuration.
For information on the complete configuration commands, see the following section.
This section describes how to configure this feature for controlling SDM messages over the N10 interface.
To configure the RAT-type with the local authorization under the DNN profile, use the following commands:
configure
profile dnn dnnprofile
authorization local rat-type [ nr | eutra | wlan ]
end NOTES:
authorization local : This command skips the SDM messages for EPS sessions only. Upon configuring this command under the selected DNN profile, the SMF skips the UDM interaction for fetch subscription. The SMF uses the values received in the ‘Create Session Request’ message. The SMF skips the UDM interaction to receive ‘Subscribe-for-Notification’ from the UDM.
rat-type [ nr | eutra | wlan ] : This keyword skips the following SDM messages based on the specified RAT-type.
udm subscription-fetch
subscribe-to-notification
unsubscribe-to-notifications
Upon configuring the RAT-type with authorization local command in the selected dnn-profile, then for sessions on that RAT-type, the SMF skips the following interactions:
the UDM interaction for ‘UDM fetch subscription’ during session establishment
the UDM interaction to ‘subscriber-for-notification’ during session establishment
the UDM interaction to ‘unsubscribe-for-notification’ during session release
no authorization local rat-type [ nr | eutra | wlan ] : Disables the local authorization under the DNN profile.
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