Section: 5.35A.2 Configuration of the MBSR
Content: 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[ NG-RAN; Architecture description ]  [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[ NG-RAN; Architecture description ]  [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[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [17]. When a PDU session is used for the MBSR to access the OAM server, the MBSR 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[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [45] including the OAM access PDU session parameters for the authorized PLMNs.