1. A terminal device comprising:a processor; and
a memory storing instructions that cause the processor to:
detect a physical downlink control channel (PDCCH) having downlink control information (DCI), wherein
if the terminal device detects the PDCCH in a subframe of a secondary cell in which a frame structure type 3 is used, the terminal device assumes a configuration of occupied OFDM symbols in the subframe of the secondary cell according to a field in the detected DCI of the PDCCH in the subframe,
the occupied OFDM symbols are used for a transmission of a downlink physical channel and/or a downlink physical signal,
the terminal device assumes that consecutive OFDM symbols, which are the occupied OFDM symbols and are constituted by (a) the earliest OFDM symbol in the subframe and (b) a subsequent OFDM symbol(s) in the subframe, are used for the transmission in the subframe, a total number of the consecutive OFDM symbols being determined corresponding to a value of the field, and
the value of the field indicates that (i) the consecutive OFDM symbols are used for the transmission in the subframe and (ii) other OFDM symbols in the subframe are not used for any transmission in the subframe.