3GPP 23.501 v20.2.0 — the document's own text
S.3 Architectures to support MWAB in SNPN case
Taught in 26. Relays, satellites, femtos and shared networks (The 5G system architecture, in depth).
The MWAB operation also supports SNPN and the corresponding architectures are presented in figures S.3-1, S.3-2 and S.3-3. The MWAB operation also supports mixed PLMN and SNPN operation, i.e. in the architecture presented in figures S.3-1, S.3-2 and S.3-3, the BH SNPN can be replaced by a PLMN and MWAB Broadcasted SNPN remains a SNPN. The SNPN operations as described in clause 5.30 apply to the MWAB-UE and the UE served by the MWAB-gNB.
Figures S.3-1 and S.3-2 present example architectures for the MWAB operation when the serving SNPN of the MWAB-UE is the same as subscribed SNPN of MWAB-UE. In this case, there may be two SNPNs involved, i.e. the BH SNPN that serves the MWAB-UE and the MWAB Broadcasted SNPN that serves the UE connected to the MWAB-gNB. The MWAB-gNB establishes N2 and N3 connection with the UE AMF and UE UPF via the PDU session of the MWAB-UE established with BH SNPN. MWAB-gNB announces SNPN ID of MWAB Broadcasted SNPN.
Figure S.3-3 presents an example architecture for the MWAB operation when the MWAB-UE accesses its serving SNPN using credentials owned by a Credential Holder. In this case, besides the two SNPNs, i.e. the BH SNPN that serves the MWAB-UE and the MWAB Broadcasted SNPN that serves the UE connected to the MWAB-gNB, the Credential Holder of MWAB-UE is also involved. The MWAB-gNB establishes N2 and N3 connection with the UE AMF and UE UPF via the PDU session of the MWAB-UE established with BH SNPN. MWAB-gNB announces SNPN ID of the MWAB Broadcasted SNPN.
