When n mobile stations performing communications using a shared channel and m mobile stations performing communications using a dedicated channel are used in a mixed manner, necessary radio resources to satisfy the transmission data rate aimed by a mobile station performing communications using a shared channel are calculated, the quality of the shared channel is guaranteed, and call admission control of a dedicated channel is performed. An HS terminal allocation power calculation unit calculates necessary transmission power to satisfy the target transmission data rate by n mobile stations based on the radio channel quality and the target transmission data rate of the n mobile stations using a shared channel. Call admission of a mobile station newly performing communications using a dedicated channel is controlled based on the necessary transmission power to satisfy the target transmission data rate by n mobile stations using a shared channel, the initial transmission power of a mobile station newly starting communications using a dedicated channel, and the transmission power of m mobile stations using a dedicated channel.