| 摘要 |
A base station device and a terminal device determine resource element mapping in which a PDSCH is mapped and perform efficient communication. The terminal device uses a first parameter set among up to 4 parameter sets in order to determine resource element (RE) mapping for the PDSCH, when decoding the PDSCH based on detection of a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH) with a Downlink Control Information (DCI) format 1A and transmitted on an antenna port 7, and determines RE mapping for the PDSCH by using the number of antenna ports for and/or a frequency position of a Cell-specific Reference Signal (CRS) in the serving cell when decoding the PDSCH based on detection of the PDCCH or the EPDCCH with the DCI format 1A and transmitted on antenna ports 0 to 3. |
