A network apparatus according to the present invention comprises: a receiver configured to receive, from a user terminal, channel state information corresponding to a channel state of a downlink signal from a cell to which the user terminal is connected, to the user terminal; a controller configured to determine transmission frequency of the channel state information; and a transmitter configured to transmit, to the user terminal, frequency information indicating the transmission frequency determined by the controller. The controller determines the transmission frequency of the user terminal on the basis of fixation information indicating that the user terminal is a fixed user terminal whose movement is restricted.