Transmission device, reception device, and method for controlling transmission power

A receiving apparatus comprising:

• a signal generating section that generates a control signal including a bit string set based on a correspondence in which bit strings are associated with a first target value candidate group and a second target value candidate group relating to a target value of transmission power of a transmitting apparatus;
• and
• a transmitting section that transmits the control signal, wherein:
• when the transmitting apparatus is not a coordinated reception target of a plurality of receiving apparatuses, a first target value candidate associated with the set bit string in the first target value candidate group is used, and when the transmitting apparatus is the coordinated reception target, a second target value candidate associated with the set bit string in the second target value candidate group is used, the first target value candidate group including first target value candidates used for transmission power control for a serving cell, the second target value candidate group including second target value candidates calculated by subtracting a path loss difference from the first target value candidates, the path loss difference being a difference between a minimum path loss level among path loss levels between the transmitting apparatus and the plurality of receiving apparatus, and a path loss level between the transmitting apparatus and the serving cell, and the second target value candidate being equal to or less than the first target value candidate.

A transmission power control method for controlling transmission power of a transmitting apparatus based on a bit string indicated from a receiving apparatus and a correspondence between bit strings and target values of the transmission power, the method comprising:

• associating, in the correspondence, the bit strings with a first target value candidate group and a second target value candidate group, the first target value candidate group including first target value candidates used for transmission power control for a serving cell, the second target value candidate group including second target value candidates calculated by subtracting a path loss difference from the first target value candidates, the path loss difference being a difference between a minimum path loss level among path loss levels between the transmitting apparatus and a plurality of receiving apparatus, and a path loss level between the transmitting apparatus and the serving cell;
• and
• calculating transmission power, when the transmitting apparatus is not a coordinated reception target of the plurality of receiving apparatuses, using a first target value candidate associated with the indicated bit string in the first target value candidate group, and calculating transmission power, when the transmitting apparatus is the coordinated reception target, using a second target value candidate associated with the indicated bit string in the second target value candidate group, the second target value candidate being equal to or less than the first target value candidate.