To obtain a base station, communication system, transmission control information notification method and wireless communication method, in which transmission timing of data for each communication service or for each transmission channel can be appropriately controlled, and to obtain a mobile station and data amount information transmission method, in which the base station can appropriately control the transmission timing.

A data amount information determining means is provided for monitoring data for each communication service or for each transmission channel to determine data amount information for each communication service or for each transmission channel, and the data amount information for each communication service or for each transmission channel, which are determined by the data amount information determining means, is transmitted to the base station.

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