Base station apparatus, wireless communication system, and communication control method

A communication control method in a base station apparatus which transmits data to a terminal apparatus, the communication control method comprising:

• determining a value of a modulation and channel coding scheme to be applied at a transmission timing of a data packet required to have the decoding error probability not more than a target error rate;
• and
• transmitting the data to the terminal apparatus, wherein
• the determining includes a process of acquiring a distribution of a variations between first communication quality used when the value of the modulation and channel coding scheme is determined and second communication quality at a time of data transmission and a process of determining a correction value of the first communication quality according to the distribution of the variations and the target error rate, and
• the transmitting includes a process of transmitting the data by using the modulation and channel coding scheme which is determined by communication quality corrected with the correction value.

A wireless communication system comprising:

• a terminal apparatus;
• and
• a base station apparatus, wherein
• the base station apparatus includes:
• a controller which determines a value of a modulation and channel coding scheme to be applied at a transmission timing of a data packet required to have the decoding error probability not more than a target error rate;
• and
• a transmitter which transmits data to the terminal apparatus,
• the controller acquires a distribution of variations between first communication quality used when the value of the modulation and channel coding scheme is determined and second communication quality at a time of data transmission and determines a correction value of the first communication quality according to the distribution of the difference amount and the target error rate,
• the transmitter transmits the data by using the modulation and channel coding scheme which is determined by communication quality corrected with the correction value, and
• the terminal apparatus includes:
• a terminal transmitter which transmits the first communication quality to the base station apparatus;
• and
• a terminal receiver which receives the data transmitted by the base station apparatus.