A communication terminal apparatus comprising: a received quality measuring section that is adapted to measure received quality on a per cell basis; a received quality reporting section (104, 108) that is adapted to report received quality information, comprising information about measured received quality of a handover candidate cell, to a network host that is a handover source of the communication terminal apparatus; a selection determining section that is adapted to determine whether or not to initiate a handover driven by the communication terminal apparatus to a handover destination cell, the determination initiating the handover being driven by the communication terminal apparatus when the measured received quality is equal to or less than a threshold; a cell selection section that is adapted to select the handover destination cell based on the received quality measured in the received quality measuring section, when the selection determining section determines to initiate the handover driven by the communication terminal apparatus; a receiving section that is adapted to receive handover destination information, comprising information about a handover destination cell selected by the network host, the handover destination cell being selected in the network host of the communication terminal apparatus based on the received quality in the reported received quality information; and handover control section that is adapted to perform a handover to the handover destination cell selected by the cell selection section when the handover destination information is not inputted from the receiving section to the handover control section in a predetermined period of time following the reporting of the received quality information to the network host. a received quality measuring section that is adapted to measure received quality on a per cell basis; a received quality reporting section (104, 108) that is adapted to report received quality information, comprising information about measured received quality of a handover candidate cell, to a network host that is a handover source of the communication terminal apparatus; a selection determining section that is adapted to determine whether or not to initiate a handover driven by the communication terminal apparatus to a handover destination cell, the determination initiating the handover being driven by the communication terminal apparatus when the measured received quality is equal to or less than a threshold; a cell selection section that is adapted to select the handover destination cell based on the received quality measured in the received quality measuring section, when the selection determining section determines to initiate the handover driven by the communication terminal apparatus; a receiving section that is adapted to receive handover destination information, comprising information about a handover destination cell selected by the network host, the handover destination cell being selected in the network host of the communication terminal apparatus based on the received quality in the reported received quality information; and handover control section that is adapted to perform a handover to the handover destination cell selected by the cell selection section when the handover destination information is not inputted from the receiving section to the handover control section in a predetermined period of time following the reporting of the received quality information to the network host.