For example, the above-described common search space type 4 and common search space type 5 may be configured to exist in not only the primary cell but also the secondary cell, all of which are configured for the terminal. That is, the terminal may monitor common search space type 4 and common search space type 5 in all of the configured primary cell and secondary cell. Since each of common search space type 4 (a purpose of pre-emption indication) and common search space type 5 (a purpose of slot format indication) corresponds to a common search space in which an indicator necessary for the terminal to transmit or receive DL/UL data can be transmitted, it may be desirable to configure common search space type 4 and common search space type 5 for all of the primary cell and the secondary cell.
Hereinabove, method 1, method 2, method 3, method 4, and method 5 have been separately described, but some of method 1, method 2, method 3, method 4, and method 5 may be combined and practiced.
Hereinabove, Embodiment 1 and Embodiment 2 have been separately described for convenience of description, but some of operations of Embodiment 1 and Embodiment 2 may be combined and practiced.