A wireless communication network can reliably deliver high priority broadcast information from base stations to mobile terminals located deep in building and those located in scarcely populated areas that are remote from the base stations. Each of the base stations of the wireless communication network comprises a broadcast information input unit for receiving high priority broadcast information and a transmission power changing unit for changing the transmission power of the downlink common channel when high priority broadcast information is input to it. As broadcast information is input, the transmission power changing unit changes the transmission power of the downlink common channel so as to boost the effective radiation power used by the downlink common channel of the base station at places in the coverage of the base station that are subjected to a propagation loss. The effective radiation power to the mobile terminals located at places in the coverage of the base station that are subjected to propagation loss is boosted to raise the reception level of the mobile terminals located at such places.