A wireless base station comprising: a communication unit configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unit configured to acquire load information related to a load of a network including the wireless base station; and a control unit configured to: receive information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit determine a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, transmit, to the mobile station via the communication unit , a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, and notify the signal determined to be measured to the mobile station via the communication unit ; wherein the signal transmitted in each of the plurality of cells is a signal from each of the plurality of cells connected to the mobile station. a communication unit configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unit configured to acquire load information related to a load of a network including the wireless base station; and a control unit configured to: receive information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit determine a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, transmit, to the mobile station via the communication unit , a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, and notify the signal determined to be measured to the mobile station via the communication unit ; receive information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit determine a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, transmit, to the mobile station via the communication unit , a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, and notify the signal determined to be measured to the mobile station via the communication unit ; wherein the signal transmitted in each of the plurality of cells is a signal from each of the plurality of cells connected to the mobile station. <EOS>