A server apparatus comprising: a number-of-terminals management section that manages the number of first terminals served by a cell of a macro base station apparatus (MeNB), and the number of second terminals served by cells each of which is smaller than the cell of the macro base station apparatus and which are formed by all small cell base station apparatuses (HeNB) located in the cell of the macro base station apparatus; a ratio calculating section that calculates a ratio of the number of first terminals to the number of second terminals; a transmission and non-transmission pattern determining section that determines a first, transmission and non-transmission pattern for the macro base station apparatus and a second transmission and non-transmission pattern for the small cell base station apparatuses based on the calculated ratio; and a transmission section that transmits, to the macro base station apparatus and the small cell base station apparatuses, a message including the determined first transmission and non-transmission pattern and identification information identifying a cell to which the determined first transmission and non-transmission pattern is to be applied, and the determined second transmission and non-transmission pattern and identification information identifying a cell to which the determined second transmission and non-transmission pattern is to be applied, wherein said first and second transmission and non-transmission patterns are arranged such that the cell of the macro base station (MeNB) avoids interference from transmissions from said small cell base station apparatuses (HeNB) of said smaller cells. a number-of-terminals management section that manages the number of first terminals served by a cell of a macro base station apparatus (MeNB), and the number of second terminals served by cells each of which is smaller than the cell of the macro base station apparatus and which are formed by all small cell base station apparatuses (HeNB) located in the cell of the macro base station apparatus; a ratio calculating section that calculates a ratio of the number of first terminals to the number of second terminals; a transmission and non-transmission pattern determining section that determines a first, transmission and non-transmission pattern for the macro base station apparatus and a second transmission and non-transmission pattern for the small cell base station apparatuses based on the calculated ratio; and a transmission section that transmits, to the macro base station apparatus and the small cell base station apparatuses, a message including the determined first transmission and non-transmission pattern and identification information identifying a cell to which the determined first transmission and non-transmission pattern is to be applied, and the determined second transmission and non-transmission pattern and identification information identifying a cell to which the determined second transmission and non-transmission pattern is to be applied, wherein said first and second transmission and non-transmission patterns are arranged such that the cell of the macro base station (MeNB) avoids interference from transmissions from said small cell base station apparatuses (HeNB) of said smaller cells.