Base station and cellular wireless communication system

A cellular wireless communication system comprising a first base station to communicate with plural terminals, and a second base station adjacent to the first base station, that controls a transmit power based on specified transmit power control parameters and a path loss between the first base station and the terminals during communication,

• wherein the first base station:
• receives from each terminal, received power quality information of a downlink reference signal from the first base station, and received power quality information of a downlink reference signal from a second base station adjacent to the first base station measured by the plural terminals;
• selects a cell-center terminal and a cell-edge terminal from the plural terminals based on the received power quality information and a power report frequency over time;
• selects the cell-center terminal based on a power report value with a largest power report frequency;
• selects the cell-center terminal and the cell-edge terminal by excluding power report values that are lower than a specified value;
• finds a first transmit power of the cell-center terminal based on an allowed interference power quantity preset in the second base station, and a first path loss between the second base station and the cell-center terminal;
• finds a second transmit power of the cell-edge terminal based on the allowed interference power quantity preset in the second base station;
• and a second path loss between the second base station and the cell-edge terminal;
• specifies the relation between path loss and transmit power by interpolating the first path loss and the first transmit power of the cell-center terminal, and the second path loss and the second transmit power of the cell-edge terminal, and also finds the transmit power control parameters utilized in controlling the transmit power in the cell-center and cell-edge terminals belonging to the first base station;
• and
• notifies the terminals belonging to the first base station of the transmit power control parameters that were found.