To perform data transmission so that an MBMS data reception enabled area becomes maximum when resources are limited in a cellular system for transmitting the same MBMS data relating to a plurality of mobile stations by a predetermined transmission rate.

When total transmission power does not exceed a threshold even if transmitting data by standard power, data transmission is performed by the standard power, while the data transmission is performed by allocatable power in which the total transmission power becomes equal to the threshold only when allocated power becomes not smaller than minimum power when the total transmission power exceeds the threshold.