Communication mode controlling method, mobile communication system, radio network controller, base station, and mobile communication terminal

A mobile communication system including a terminal for mobile communications, a base station which radiocommunicates with this terminal, and an RNC (Radio Network Controller) which controls this base station, wherein:

• said terminal comprises,
• a terminal buffer for storing uplink data to be transmitted to said base station,
• a buffer status information unit for transmitting terminal buffer state information indicating a state of said terminal buffer to said base station, and
• a data transmitting unit for transmitting the data said base station according to setting of uplink radio resources performed by said base station;
• said base station comprise,
• an interference amount measuring unit for measuring an amount of interference about received signals,
• an interference amount notifying unit of notifying said amount of interference measured by said interference amount measuring unit to said RNC, and
• an uplink radio resource setting unit for receiving said terminal buffer state information and performing scheduling, and for performing the setting of the uplink radio resources to said terminal;
• and
• said RNC comprises a maximum interference amount setting unit for setting, as a result of said scheduling, a maximum amount of interference which must not be exceeded to said base station.