5.35A.2 Configuration of the MBSR

In order for an MBSR to operate as a mobile IAB node, it receives configuration from the OAM system of the serving PLMN as specified in TS 38.401 [42]. The MBSR (IAB-UE) establishes a secure and trusted connection to the OAM server only if it is authorized to operate as MBSR in the serving PLMN as defined in TS 38.401 [42].

In addition, the MBSR(IAB-UE) is assumed to be configured with preferred PLMN lists and forbidden PLMNs by the HPLMN to perform PLMN selection as specified in TS 23.122 [17].

When a PDU session is used for the MBSR to access the OAM server, the MBSR (IAB-UE) establishes a dedicated PDU session for the OAM traffic. The serving PLMN provides an Allowed NSSAI and establishes the PDU session for the OAM server access, considering the S-NSSAI and DNN requested by MBSR and/or the default values in subscription data. The MBSR can be (pre-)configured with UE policy or provisioned using existing UE Policy mechanism as defined in TS 23.503 [45] including the OAM access PDU session parameters for the authorized PLMNs.