There are a step in which, when the video data distribution request is received from the mobile station, the base station determines whether the requested video data can be distributed or not, on the basis of the wireless transmission capacity required for distributing the requested video data and the wireless transmission capacity that is available at that point of time, a step in which the base station notifies the mobile station of a result of possibility determination about distribution, a step in which, when it is determined that distribution cannot be performed, the base station sends an inquiry about a base station capable of performing distribution, to the transmitted-data capacity management device, a step in which the transmitted-data capacity management device selects base stations capable of performing the distribution, on the basis of the wireless transmission capacity required for distributing the video data and the wireless transmission capacity being used for distribution performed by a plurality of base stations, and replies with the selected base stations, and a step in which the base station notifies the mobile station of the base stations capable of performing the distribution.