Section: 5.30.2.10.4 Remote Provisioning of UEs in Onboarding Network
Content: 5.30.2.10.4.1 General Remote Provisioning of UEs that registered with an Onboarding Network enables provisioning the UE with SNPN credentials for primary authentication and other information to enable access to the desired SNPN. Onboarding Services are provided using a PDU Session for DNN and S-NSSAI used for onboarding allowing remote provisioning of UEs via User Plane. The PDU Session may be restricted only to be used for Remote Provisioning of the UE. 5.30.2.10.4.2 Onboarding configuration for the UE In order to enable UP Remote Provisioning of SNPN credentials for a UE, UE Configuration Data for User Plane Remote Provisioning are either pre-configured on the UE or provided by the ONN. UE Configuration Data for User Plane Remote Provisioning provided by the ONN take precedence over corresponding configuration data stored in the UE. UE Configuration Data for User Plane Remote Provisioning consist of PVS IP address(es) and/or PVS FQDN(s). If the UE does not have any PVS IP address or PVS FQDN after the establishment of the PDU Session used for User Plane Remote Provisioning, the UE may construct an FQDN for PVS discovery as defined in TS 23.003[ Numbering, addressing and identification ]  [19]. The UE Configuration Data for User Plane Remote Provisioning may be stored in the ME. The UE Configuration Data for User Plane Remote Provisioning (i.e. PVS IP address(es) or PVS FQDN(s), or both) may be: - locally configured in the SMF of ONN; and/or - provided by the DCS to the AMF of ON-SNPN as part of the authentication procedure as specified in TS 33.501[ Security architecture and procedures for 5G System ]  [29] and sent by the AMF in the Nsmf_PDUSession_CreateSMContext Request message to the SMF If the SNPN acting as ON-SNPN is not capable to provide access to Localized Services, the PVS IP address(es) and/or PVS FQDN(s) provided by the DCS take precedence over the locally configured PVS IP address(es) and/or PVS FQDN(s) in the ON-SNPN. If the SNPN acting as ON-SNPN is capable to provides access to Localized Services, the SMF should include both DCS provided and the locally configured PVS IP address(es) and/or PVS FQDN(s), in the UE Configuration Data for User Plane Remote Provisioning. If the PCF is used for User Plane Remote Provisioning, the SMF provides the UE Configuration Data to the PCF as described in clause 5.30.2.10.4.3. The UE Configuration Data for User Plane Remote Provisioning may be provided to the UE during the establishment of the PDU Session used for User Plane Remote Provisioning as part of Protocol Configuration Options (PCO) in the PDU Session Establishment Response. NOTE: If there are multiple PVS IP addresses and/or PVS FQDNs in the UE, how the UE selects PVS from this information is up to UE implementation. 5.30.2.10.4.3 User Plane Remote Provisioning of UEs when Onboarding Network is an ON-SNPN The AMF selects an SMF used for User Plane Remote Provisioning using the SMF discovery and selection functionality as described in clause 6.3.2. The S-NSSAI and DNN of the AMF Onboarding Configuration Data may be used to discover and select an SMF for User Plane Remote Provisioning. Alternatively, for SMF selection, the AMF Onboarding Configuration Data may contain a configured SMF for the S-NSSAI and DNN used for onboarding. The AMF provides Onboarding Indication to SMF via Nsmf_PDUSession_CreateSMContext request message when a PDU Session used for User Plane Remote Provisioning is established. During PDU Session establishment for remote provisioning, the AMF may provide the PVS IP address(es) and/or PVS FQDN(s) to the SMF. When a UPF is selected for User Plane Remote Provisioning, the UPF selection function described in clause 6.3.3 for normal services is applied considering the S-NSSAI and DNN used for onboarding. The SMF or the PCF may store S-NSSAI and DNN information used for onboarding. Onboarding Configuration Data available to PCF (for details see TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [45]) and/or SMF may include PVS FQDN(s) and/or PVS IP address(es). The SMF and the PCF may use Onboarding Indication and DNN and S-NSSAI used for onboarding to access the Onboarding Configuration Data. NOTE: The SMF is aware about the PVS IP address(es) and/or PVS FQDN(s) in one of the following ways: either received from the AMF or retrieved locally from the Onboarding Configuration Data. When the UE registered for Onboarding (i.e. 5GS Registration Type is set to the value "SNPN Onboarding") successfully completes the User Plane Remote Provisioning of SNPN credentials via the Onboarding Network, then the UE should deregister from the Onboarding Network. Initial QoS parameters used for User Plane Remote Provisioning are configured in the SMF when dynamic PCC is not used. Dynamic PCC may be used for a PDU Session used for User Plane Remote Provisioning as described in TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [45]. If a PCF is used and the AMF provided an Onboarding Indication, the SMF provides Onboarding Indication to the PCF when requesting an SM Policy Association. The SMF may provide the UE Configuration Data (i.e. PVS IP address(es) and/or PVS FQDN(s)) to the PCF when requesting an SM Policy Association. The QoS Flows of a restricted PDU Session, which is associated with the S-NSSAI/DNN used for Onboarding, shall be dedicated to Onboarding Services. The SMF may configure in the UPF PDR(s) and FAR(s) including PVS and DNS server IP addresses to block any traffic that is not from or to PVS and DNS server addresses. If the UE is registered for Onboarding (i.e. 5GS Registration Type is set to the value "SNPN Onboarding"), the network should apply S-NSSAI and DNN in the Onboarding Configuration Data for the PDU Session Establishment request from the UE. 5.30.2.10.4.4 User Plane Remote Provisioning of UEs when Onboarding Network is a PLMN Subscription data of such a UE shall contain the DNN and S-NSSAI used for onboarding. The AMF selects an SMF used for User Plane Remote Provisioning using the SMF discovery and selection functionality as described in clause 6.3.2, considering the DNN and S-NSSAI used for onboarding provided by the UE or the default DNN and S-NSSAI provided by UDM. The UPF selection function described in clause 6.3.3 is applied, considering the DNN and S-NSSAI used for onboarding. The SMF may be configured with one or more PVS FQDN(s) and/or PVS IP address(es) per DNN and S-NSSAI used for onboarding. When the UE requests a PDU Session used for User Plane Remote Provisioning by using DNN and S-NSSAI used for onboarding, the SMF sends the PVS FQDN(s) and/or PVS IP address(es) associated to the DNN and S-NSSAI of the PDU Session to the UE as part of Protocol Configuration Options (PCO) in the PDU Session Establishment Response if the following conditions are met: - the UE subscription data contains the DNN and S-NSSAI used for onboarding; and - the SMF has obtained the PVS FQDN(s) and/or PVS IP address(es) associated to the DNN and S-NSSAI of the PDU Session from local configuration; and - the UE has requested PVS information via PCO in PDU Session Establishment Request. NOTE 1: Local PCC or dynamic PCC can be used as described for PLMNs in TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [45] and based on operator policy, PDR(s) and FAR(s) can be configured to restrict traffic other than provisioning traffic between PVS/DNS server(s) and UE(s). NOTE 2: If the UE receives multiple PVS IP addresses and/or PVS FQDNs, how the UE uses this information is up to UE implementation.