Patent ID: 8351957

Claim:
An overload control device in a mobile communication system, the device comprising: a load measuring unit configured to measure a load of a radio network controller, wherein the radio network controller is in data communication with a plurality of base stations; an overload determining unit configured to determine whether an overload has occurred in the radio network controller based, at least in part, on the comparison of the measured load and a predetermined load; a call admission ratio setting unit configured to set a call admission ratio according to the level of the determined overload, wherein an admitted transmission output of a base station is determined based, at least in part, on the call admission ratio and a maximum transmission output of the base station; and a call connection controller configured to limit a new call connection setting of at least one of the base stations which has a total transmission output greater than the admitted transmission output, wherein the total transmission output indicates a power output of tile at least one base station for transmitting at least one call during a predetermined period.