Patent ID: 8717912

Claim:
A communication quality judgment method, comprising: determining a path loss by using both setting power of a common pilot channel notified from a base station to a mobile station and a received power of a signal received through the common pilot channel by the mobile station; estimating an expected received power of an uplink signal by using both a transmit power applied by the mobile station to the uplink signal and the path loss measured in the path-loss determining, the estimated power indicating a value expected to be measured by a base station which receives the uplink signal transmitted by the mobile station; and estimating a signal-to-interference ratio (SIR) by using both an interference power notified from the base station to the mobile station and the received power of the uplink signal estimated in the received power estimation, the estimated signal-to-interference ratio indicating a value expected to be measured by the base station which receives the uplink signal transmitted by the mobile station.