BASE STATION AND RELATED RADIO COMMUNICATION METHOD

摘要

Provided are a terminal device and a retransmission control method that make it possible to minimize increases in overhead in an uplink control channel (PUCCH), even if channel selection is used as the method to transmit response signals during carrier-aggregation communication using a plurality of downlink unit bands. On the basis of the generation status of uplink data and error-detection results obtained by a CRC unit, a control unit in the provided terminal uses response signal transmission rules to control the transmission of response signals or uplink control signals that indicate the generation of uplink data. If an uplink control signal and a response signal are generated simultaneously within the same transmission time unit, the control unit changes the resources allocated to the response signal and/or the phase point of the response signal in accordance with the number and position of ACKs within the error-detection result pattern.

主权项

1. An integrated circuit to control a process, the process comprising:
detecting downlink assignment information indicating a resource for downlink data, the resource being assigned to each of one or more downlink component carriers, with which a terminal is configured; decoding the downlink data, which is transmitted in the resource indicated by the detected downlink assignment information; and transmitting a response signal for the decoded downlink data and transmitting a scheduling request (SR), wherein:
the response signal denotes an outcome of the decoding of the downlink data, or denotes a Discontinuous Transmission (DTX) representing that the outcome is not transmitted;when a plurality of downlink component carriers are configured, response signals for a plurality of downlink data in the downlink component carriers are transmitted;when the response signals are transmitted, the response signals are transmitted using a phase point and one of uplink control channel resources for the response signals depending on an outcome of the decoding of each of the plurality of downlink data; andwhen both the response signals and the SR are transmitted in a same sub-frame, the response signals are transmitted using the phase point and an uplink control channel resource for the SR depending on the outcome of the decoding of each of the plurality of downlink data.