Base station, terminal, transmission method, and reception method

摘要

Provided are a base station, a terminal whereby erroneous detection of control information can be reduced to prevent the degradation of the system throughput. A PDCCH generation unit (104) forms a downstream allocation control information unit (i.e., DCI) including cyclic redundant check (CRC) bits, which have been masked or scrambled by use of ID information of a terminal (200), and further including a bit sequence (i.e., virtual CRC) known between the terminal (200) and the base station; and an allocation unit (108) and a multiplex unit (109) map the formed DCI to a resource region (i.e., R-PDCCH region) that can be used as any one of a downstream control channel region and a downstream data channel region. That is, the PDCCH generation unit (104) includes the virtual CRC into the DCI only when the DCI addressed to the terminal (200) is mapped to the R-PDCCH region.

主权项

1. A base station comprising:
a generation section that generates control information that includes a cyclic redundancy check (CRC) bit masked or scrambled by identification information of a terminal; and a mapping section that maps the generated control information in a Relay-Physical Downlink Control Channel (R-PDCCH) resource region available to both the control channel and a data channel, wherein the generation section adds a known bit known by the terminal to the control information when using the R-PDCCH resource region for transmitting the control information, and the known bit is added to the control information when the control information is other than DCI 0 or DCI 1A and the known bit is not added to the control information when the control information is DCI 0 or DCI 1A.