A base station device adapted for determining whether a user terminal is designated to a PLMN always using ReportCGI, the base station device further comprising: a storage unit adapted to store a neighbor relation table; a scheme selection unit adapted to select a scheme of HO from a first scheme not using the neighbor relation table if the user terminal is designated and a second scheme using the neighbor relation table when receiving a measurement report for HO from the user terminal if the user terminal is not designated; and an HO control unit adapted, when the first scheme is selected, to cause the user terminal to measure system information of an HO candidate cell , to receive, from the user terminal , a cell global identifier included in the system information, to receive cell information of the HO candidate cell from a core network by using the cell global identifier and to control HO of the user terminal by using the received cell information, and when the second scheme is selected, to determine whether a physical cell identifier of the HO candidate cell is included in the neighbor relation table, when the physical cell identifier is included, to control the HO of the user terminal by using cell information corresponding to the physical cell identifier, and when the physical cell identifier is not included, to cause the user terminal to measure the system information of the HO candidate cell , to receive, from the user terminal , the cell global identifier included in the system information, to receive cell information of the HO candidate cell received from a core network by using the cell global identifier, and to control the HO of the user terminal by using the received cell information of the HO candidate cell , and to register the received cell information in the neighbor relation table. a storage unit adapted to store a neighbor relation table; a scheme selection unit adapted to select a scheme of HO from a first scheme not using the neighbor relation table if the user terminal is designated and a second scheme using the neighbor relation table when receiving a measurement report for HO from the user terminal if the user terminal is not designated; and an HO control unit adapted, when the first scheme is selected, to cause the user terminal to measure system information of an HO candidate cell , to receive, from the user terminal , a cell global identifier included in the system information, to receive cell information of the HO candidate cell from a core network by using the cell global identifier and to control HO of the user terminal by using the received cell information, and when the second scheme is selected, to determine whether a physical cell identifier of the HO candidate cell is included in the neighbor relation table, when the physical cell identifier is included, to control the HO of the user terminal by using cell information corresponding to the physical cell identifier, and when the physical cell identifier is not included, to cause the user terminal to measure the system information of the HO candidate cell , to receive, from the user terminal , the cell global identifier included in the system information, to receive cell information of the HO candidate cell received from a core network by using the cell global identifier, and to control the HO of the user terminal by using the received cell information of the HO candidate cell , and to register the received cell information in the neighbor relation table. <EOS>