Section: 6.44.1.4 Subscription-based routing to a particular core network (e.g. in a different country)
Content: The “Subscription-based routing to a particular core network” service forwards the traffic from the HPLMN to a target PLMN. Some operators use more than one PLMN ID, e.g., multi-national operators. Due to certain business and operational demands, it might be necessary to route traffic of a certain customer segment, typically from a certain IMSI range of USIMs, of a PLMN to another PLMN and to further handle the subscriber there. This means the UE is not handled by the "real" HPLMN (according to MNC and MCC) but by some alternative PLMN. This subscription-based routing enables the case where several national subsidiaries of a multi-national operator offer various services for different customer segments but for operational efficiency the actual service for a certain group is provided by only one dedicated network.