3GPP 23.501 v20.2.0 — the document's own text
U.2 PDU Session establishment for supporting traffic offloading at the H-UPF
Taught in 18. Being served by somebody else's network (The 5G system architecture, in depth), 27. Overload, energy, deployment and the rest (The 5G system architecture, in depth).
This clause describes the HR PDU Session establishment for the roaming traffic offloading at the H-UPF deployed nearby VPLMN.
The following are some considerations:
1. The H-SMF decides to support roaming traffic offloading at the H-UPF for HR PDU Session based on the configured operator policy
2. When performing H-UPF selection as described in clause 6.3.3.3, UE location information (e.g. MNC and MCC of the VPLMN) can be considered in order to select a H-UPF nearby VPLMN for a given HR PDU Session, based on the HPLMN operator policy.
3. Based on the operator policy, the selected H-UPF deployed nearby VPLMN can provide the H-SMF with the DNS server information, if it is locally configured, as described in clause 5.8.2.2.