FIG. 9 is a drawing illustrating an example of a functional structure of a user apparatus 20 according to an embodiment of the present invention. As illustrated in FIG. 9, the user apparatus 20 includes a transmission unit 210, a reception unit 220, a configuration unit (setting unit) 230, and a control unit 240. The functional structure illustrated in FIG. 9 is merely an example. Functional divisions and names of functional units may be anything as long as operations can be performed according to an embodiment of the present invention.

The transmission unit 210 generates a transmission signal from transmission data and transmits the transmission signal wirelessly. The reception unit 220 receives various signals wirelessly and obtains upper layer signals from the received physical layer signals. Further, the reception unit 220 has a function for receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc., transmitted from the base station apparatus 10. Further, for example, with respect to the D2D communications, the transmission unit 210 transmits, to another user apparatus 20, PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc., and the reception unit 120 receives, from the another user apparatus 20, PSCCH, PSSCH, PSDCH, or PSBCH.