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NR Network Architecture / Network Interface
Following is the overal NR Network illustrated based on 23.501. The diagram is based mainly on Figure 4.2.3-1 and Figure 4.2.3-2 of 23.501.
The numbers in the oval shape indicates the reference point between components. This shows NR network only in non-roaming condition. In the condition of roaming with other NR network or Legacy network, some additional function block and interface(reference point) is required.
Followings are the name of each network component.
AMF Access and Mobility Management Function
AUSF Authentication Server Function
DN Data Network
NEF Network Exposure Function
NRF Network Repository Function
NSSF Network Slice Selection Function
PCF Policy Control Function
(R)AN (Radio) Access Network
SMF Session Management Function
UDM Unified Data Management
UPF User Plane Function
SMSF SMS Function