User terminal, radio base station apparatus and radio communication method

摘要

The present invention adequately controls feedback control information in uplink transmission in a system band formed with a plurality of CCs. The present invention provides a data information demodulation section, which demodulates downlink shared channel signals of CCs from a radio base station apparatus, a retransmission check section, which checks retransmission and outputs a retransmission acknowledgement signal in response to the downlink shared channel signal of each of the plurality of CCs, a control information demodulation section, which demodulates downlink control information and detects the number of transport blocks, and a channel selection control section, which, with reference to a mapping table in which combinations of retransmission acknowledgement signals for the downlink shared channel signals of the plurality of CCs are defined using a plurality of radio resources and phase modulation bit information, determines radio resources to use to transmit the retransmission acknowledgement signals from a radio resource of an uplink control channel of a specific CC, and changes the content of the mapping table according to the number of transport blocks of the specific fundamental frequency block.

主权项

1. A user terminal comprising:
a data information demodulation section configured to demodulate downlink shared channel signals of a plurality of fundamental frequency blocks from a radio base station apparatus; a retransmission check section configured to check retransmission and outputs a retransmission acknowledgement signal in response to the downlink shared channel signal of each of the plurality of fundamental frequency blocks; a control information demodulation section configured to demodulate downlink control information from the radio base station apparatus and detect the number of transport blocks; and a channel selection control section configured to, with reference to a mapping table in which combinations of retransmission acknowledgement signals for the downlink shared channel signals of the plurality of fundamental frequency blocks are defined using a plurality of radio resources and phase modulation bit information, determine radio resources to transmit the retransmission acknowledgement signals from a radio resource of an uplink control channel of a specific fundamental frequency block, wherein the channel selection control section changes content of the mapping table according to the number of transport blocks of the specific fundamental frequency block.