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

4.4.6.1 User plane architecture to support 5G LAN-type service

Taught in 21. Emergency calls, messages, voice and location (The 5G system architecture, in depth).

The general User Plane architectures described in clause 4.2.3 and clause 4.2.4 apply to 5G LAN-type services, with the additional options described in this clause.

Figure 4.4.6.1-1 depicts the non-roaming user plane architecture to support 5G LAN-type service using local switch.

Figure 4.4.6.1-1: Local-switch based user plane architecture in non-roaming scenario

Figure 4.4.6.1-2 depicts the non-roaming user plane architecture to support 5G LAN-type service using N19 tunnel.

Figure 4.4.6.1-2: N19-based user plane architecture in non-roaming scenario

NOTE: As described in clause 5.29.3, the PSA UPFs can be controlled by a dedicated SMF, a dedicated SMF Set or multiple SMF Sets.