Supported Interfaces
This section describes the interfaces supported between the UPF and other network functions in 5GC.
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N3: Interface between the RAN (gNB) and the (initial) UPF; compliant with 3GPP TS 29.281 and 3GPP TS 38.415 (December-2018).
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N4: Interface between the Session Management Function (SMF) and the UPF; compliant with 3GPP TS 29.244 (December-2018).
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N6: Interface between the Data Network (DN) and the UPF; compliant with 3GPP TS 29.561 (December-2018).
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Sx: Interface between the Control-Plane and User-Plane in a split P-GW, S-GW, and TDF architecture in an Evolved Packet Core (EPC); compliant with 3GPP TS 23.214 and 3GPP TS 33.107.