A method is implemented by a controller functioning as a node in a source Radio Access Network (RAN) to control handover of a mobile station (MS), where the handover of the MS is from a source cell of the source RAN operating in packet switched (PS) domain to a target cell of a target RAN operating in PS domain. The target RAN supports multi-operator core network (MOCN). The method includes transmitting a system information 3 (SI3) message by the node to the MS, the SI3 message including a selected public land mobile network (PLMN) of the target cell, and transmitting a PS handover command to the MS subsequent to transmitting the SI3 message.