| 摘要 |
<p>This invention is related to a terminal apparatus that can normally transmit an upstream response signal from the terminal to a base station even when a difference in recognition about a number of downstream unit bands set in the terminal has occurred between the base station and the terminal. A response signal generating unit (212) generates response signals on the basis of a setting rule in which pattern candidates of success or failure in the reception of downstream allocation control information and downstream data are associated with the phase points of response signals and further in which the phase point of one response signal associated with an arbitrary pattern of success or failure in the reception during the second communication has been set to be identical with the phase points of two response signals associated with pattern candidates for which the pattern of success or failure in the reception at PCC during the first communication is identical with the arbitrary pattern and for which all of the receptions of downstream allocation control information have been failed at SCC. When the second communication is performed, a secondary spreading unit (215) uses a first sequence to spread one response signal. When the first communication is performed, the secondary spreading unit (215) uses second and third sequences, which are partial sequences obtained by dividing the first sequence, to spread two response signals.</p> |
