Patent ID: 8335233

Claim:
A base station apparatus for communicating with a user equipment terminal using an uplink shared channel, comprising: a calculation unit configured to calculate path loss between the user equipment terminal and the base station apparatus; a power offset determination unit configured to determine a power offset between the uplink shared channel and a sounding reference signal based on the path loss; a first offset calculation unit configured to calculate a radio quality offset for the u uplink shared channel based on both a decoding result of the uplink shared channel and a required uplink quality; a second offset calculation unit configured to calculate a radio quality offset for the uplink shared channel based on a priority level determined by a data type; a first radio quality calculation unit configured to calculate an expected value of radio quality of the uplink shared channel based on the power offset, radio quality of the sounding reference signal, and a sum of the radio quality offsets calculated by the first offset calculation unit and the second offset calculation unit; a Modulation and Coding Scheme (MCS) selection unit configured to select an MCS level of the uplink shared channel based on the expected value of radio quality of the uplink shared channel; and a reception unit configured to receive the uplink shared channel from the user equipment terminal.