Patent ID: 8786352

Claim:
A threshold computation apparatus comprising: an estimator configured to compute and output estimated interference power that is an estimated value of interference power for an uplink as a communication link from a terminal to a base station; a storage unit configured to store a predetermined communication quality value necessary for the uplink, a maximum value of transmission power of the terminal, and transmission power of the base station for a downlink as a communication link from the base station to the terminal; a received power computation unit that is connected to the estimator and the storage unit, configured to: obtain the estimated interference power from the estimator; the predetermined communication quality value; the maximum value of transmission power of the terminal; and the transmission power of the base station from the storage; subtract a logarithmic value of the maximum value of the transmission power of the terminal from a logarithmic value of the transmission power of the base station for the downlink; adds a logarithmic value of the communication quality value and a logarithmic value of the estimated interference power to a result of the subtraction; and determine a result of the addition to be a logarithmic value of received power at the terminal; and a threshold computation unit that is connected to the received power computation unit and configured to compute a threshold based on the logarithmic value of the received power at the terminal and a predetermined condition.