Mobile station apparatus, communication system, communication method, and integrated circuit

摘要

A mobile station apparatus controls the transmission method of uplink signals to efficiently transmit uplink control information, while avoiding increase of overhead of the control information. The mobile station apparatus has a reception processing unit 401 which performs detection processing of a physical downlink control channel in a plurality of cells, an uplink control information generating unit 4051 which generates a reception confirmation response to data of one or more physical downlink shared channels for which assignment of a resource is indicated by downlink control information included in one or more physical downlink control channels detected in a same subframe by the reception processing unit 401, a control unit 405 which controls application of transmission diversity to a physical uplink control channel according to a situation of a cell in which the physical downlink shared channel has been detected by the reception processing unit 401, and a transmission processing unit 407 which transmits the reception confirmation response generated in the uplink control information generating unit according to a control result of the control unit 405, using the physical uplink control channel.

主权项

1. A mobile station apparatus configured to and/or programmed to communicate with a base station apparatus by using a plurality of downlink component carriers, the plurality of downlink component carriers including a first downlink component carrier and a second downlink component carrier, the mobile station apparatus comprising:
a transmitter configured to and/or programmed to transmit, to the base station apparatus, information of ACK/NACK for a physical downlink shared channel transmission indicated by a detection of a physical downlink control channel, the information of ACK/NACK being transmitted using one of a first physical uplink control channel format and a second physical uplink control channel format, wherein in a case that there is the physical downlink shared channel transmission only on the first downlink component carrier, the first physical uplink control channel format is used for the transmission of the information of ACK/NACK, in a case that there is the physical downlink shared channel transmission on the second downlink component carrier, the second physical uplink control channel format is used for the transmission of the information of ACK/NACK, and the transmitter is configured to and/or programmed to use one of at least a first method and a second method to transmit the information of ACK/NACK, the first method being a method of using two first physical uplink control channel resources for two antenna ports with the first physical uplink control channel format, and the second method being a method of using one second physical uplink control channel resource for one antenna port with the second physical uplink control channel format.