3GPP 23.501 v20.2.0 — the document's own text

V.1 NR Femto Deployment Options

Taught in 26. Relays, satellites, femtos and shared networks (The 5G system architecture, in depth).

Figure V.1-1 depicts the deployment options of NR Femto with a locally deployed UPF close to the location of NR Femto node(s). The locally deployed UPF is a 5GC entity, has a direct N4/N9 interface with the 5GC and can be selected based on the edge computing functionality specified in clause 5.13. The NR Femto GW is optionally used as a concentrator for N2 interface. N3 interface directly goes to a centrally deployed UPF (behind the NR Femto GW) or to a locally deployed UPF (close to NR Femto node location). N3 interface may also go via the NR Femto GW where in this case, the NR Femto GW only performs routing at IP layer.

Figure V.1-1: NR Femto deployment options for 5GS

NOTE: The SeGW is out of the scope of this specification.