Device and method of determining quality of radio communication in a mobile communication system

摘要

The device executes quality degradation determining operation only when the received cell is NG-cell. The device calculates the number of OK-cells while at least two NG-cells are received by dividing each duration time of the two NG-cells by cell receiving cycle, and by summing up the results of the division. Then the device determines that the quality degradation of radio network occurs if the number of OK-cells is less than a predetermined threshold value.