BASE STATION DEVICE, MOBILE STATION DEVICE, RADIO COMMUNICATION METHOD, AND INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To flexibly report an orthogonal resource used for a DMRS while keeping the same overhead of a PDCCH as that of the conventional ones.

SOLUTION: A mobile station device receives downlink control information including at least first control information used for a base station device to select a code point from a combination of a space multiplex sequence number (rank) of data used in transmission by a PUSCH and an orthogonal resource used for a demodulation reference signal transmitted with the PUSCH, and second control information showing the space multiplex sequence number, selects the orthogonal resource used for the demodulation reference signal set in the base station device from the first control information and the second control information included in the downlink control information, generates the demodulation reference signal by applying the selected orthogonal resource, and transmits the demodulation reference signal to the base station device.

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