Patent ID: 7647066

Claim:
A transmission power control apparatus which is coupled to and controls a base station apparatus, said transmission power control apparatus comprising: a calculating part configured to calculate an increase or decrease value of a reference Signal-power-to-Interference-power Ratio (SIR) value, which controls a transmission power of a mobile terminal equipment, for an inner loop transmission power control based on reception quality information; an updating part configured to update a reference value of the reference SIR value when adding or deleting a radio access bearer; an adding part configured to add the increase or decrease value to the updated reference value of the reference SIR value; and a notifying part configured to notify an added value of the reference value and the increase or decrease value to the base station apparatus as a set value of the reference SIR value, wherein the reference SIR value is controlled based on a reception quality of a plurality of radio access bearers at the base station apparatus, with respect to a physical channel to which the plurality of radio access bearers are mapped, when making a radio connection between the mobile terminal equipment and the base station apparatus in a mobile communication system, and a transmission power control is carried out by setting the reference SIR value based on an updated reference value when adding or deleting the radio access bearer.