RADIO BASE STATION AND MOBILE COMMUNICATION METHOD

摘要

A radio base station according to the present invention comprising : a radio base station comprising a resource assignment unit configured to assign a resource candidate for transmitting a semi-persistent scheduling transmission acknowledgement signal to a first mobile station during a semi-persistent scheduling bearer setting process, the resource candidate for transmitting a semi-persistent scheduling transmission acknowledgement signal is a resource candidate formed by a combination of a frequency direction resource and a code direction resource by which the first mobile station transmits a transmission acknowledgement signal after a predetermined timing from a timing of receiving downlink data, to the downlink data that has been scheduled by semi-persistent scheduling and has been transmitted via a downlink data channel, and the resource assignment unit is configured to assign the resource candidate for transmitting a semi-persistent scheduling transmission acknowledgement signal to the first mobile station based on a number of assignments of predetermined resources formed by a combination of a frequency direction resource and a code direction resource during a semi-persistent scheduling transmission acknowledgement signal transmission period of the first mobile station, and when the downlink data is scheduled by the semi-persistent scheduling, the resource assignment unit is configured to select a resource for transmitting a transmission acknowledgment signal for the downlink data from among the resource candidates for transmitting a semi-persistent scheduling transmission acknowledgement signal.