Terminal and communication method thereof

摘要

A terminal and a communication method thereof whereby, even in a case of employing the asymmetric carrier aggregation system and further employing the MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded.

主权项

1. A base station apparatus comprising:
a transmitter which, in operation, transmits downlink data to a terminal apparatus; a receiver which, in operation, receives a plurality of transport blocks which are transmitted in a same time period using a same frequency band in a spatial multiplexing scheme, wherein a same acknowledgement information (ACK) relating to an error detection result of the downlink data is scrambled with different scrambling schemes respectively for the plurality of transport blocks and the respectively scrambled acknowledgement information is arranged on respective ones of the plurality of transport blocks, and channel quality information (CQI) of a downlink channel is arranged on only one transport block of the plurality of transport blocks by the terminal apparatus; and a control information receiver which, in operation, extracts the acknowledgement information arranged on respective ones of the plurality of transport blocks and the channel quality information arranged on the only one transport block of the plurality of transport blocks.