N9: Interface between two UPF’s (i.e the Intermediate I-UPF and the UPF Session Anchor) N6: Interface between the Data Network (DN) and the UPF. N4: Interface between the Session Management Function (SMF) and the UPF.
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N5: Reference point between the PCF and an AF . N7: Reference point between the SMF and the PCF. N8: Reference point between the UDM and the AMF. N10: Reference point between the UDM and the SMF. N11: Reference point between the AMF and the SMF.
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