RADIO COMMUNICATION BASE STATION DEVICE AND RESOURCE SHARING METHOD

摘要

A radio communication base station device capable of reducing the downlink resources required for ACK/NACK channels to improve data transmission efficiency. In this device, an allocation control channel allocating section (101) allocates inputted uplink allocation information (#1 to #K) to any of allocation control channels (CH#1 to #K). An ACK/NACK channel allocating section (105) allocates an acknowledgment signal with respect to each mobile station to the allocation control channel in which the uplink allocation information of each mobile station is allocated and an ACK/NACK channel associated with the number of transmission of the uplink data of each mobile station. An arrangement section (106) arranges the ACK/NACK channel to which the acknowledgment signal is allocated in a downlink resource shared by a plurality of ACK/NACK channels including the ACK/NACK channel to which the acknowledgment signal is allocated.