Radio network system

A radio network controller operable to control and assign a radio link to any of mobile stations, the radio network controller comprising:

• a transfer destination specifying unit operable to select a core network device to which location registration information is transmitted, from a plurality of core network devices in a pool area in which the plurality of core network devices are managed by the radio network controller;
• and
• a location registration information transfer unit operable to transmit the location registration information including a femtocell identifier used to identify that the radio network controller is the device for the femtocell in the location registration information transmitted to the radio network controller from the mobile station for the location registration request, to the core network device selected by the transfer destination specifying unit;
• wherein the transfer destination specifying unit selects the core network device differing from the core network device that has already selected in the pool area, when the location registration information transfer unit receives location registration rejection information used to indicate a rejection of storing the location information, transmitted from the core network device.