Patent ID: 7840179

Claim:
A base station that has a function to distribute video data provided by a distribution server via multicast to a mobile station located in a wireless area managed by the base station in response to a video data distribution request sent from the mobile station, the base station comprising: a wireless transmission capacity managing module configured to manage a wireless transmission capacity available for distributing the video data; a determining module configured to, when the video data distribution request is received from the mobile station, determine whether distribution can be performed in response to the video data distribution request, on the basis of whether the requested video data is already distributed by the base station, a wireless transmission capacity required for distributing the requested video data, and a wireless transmission capacity managed by the wireless transmission capacity managing module and is available at a point of time that the video data distribution request is received; and an execution control module configured to notify the mobile station of a result of the determination about distribution, which is made by the determining module, and for controlling distribution of the video data on the basis of the result of the determination.