Base station device and wireless communication method

A base station device forming a cell and performing wireless communication with a mobile terminal being present in the cell, comprising:

• a determining unit configured to determine application of adaptive modulation and coding to only the wireless communication with a mobile terminal being present in a predetermined area of a part of the cell, wherein the determining unit has a Modulation and Coding Scheme (MCS) Set corresponding to a valid range of Channel Quality Indicator (CQI) values;
• a control signal generating unit configured to make redundancy of control information used for the adaptive modulation and coding smaller than redundancy of other control information and to adaptively set a redundancy of control information used for the adaptive modulation and coding depending on the valid range of the CQI values corresponding to the MCS Set;
• a changing unit configured to change the range of the valid CQI values based on interference information collected from at least one of peripheral base station devices other than a module terminal;
• and
• a format changing unit configured to change, if the determining unit does not determine the application of the adaptive modulation and coding, a format to a communication format in which user data is allocated in place of the control information used for the adaptive modulation and coding.