Unlike those described above, in embodiment 4, single SSB indication information may be provided like in legacy NR. Together with this, an N_shift value may be further designated considering the additional shift pattern. For example, if ‘N_shift’=2 is given, SSB detection for the pattern in which it has been+2 moved from the existing position may be attempted. Accordingly, if LBT fails in the corresponding position, a chance of additional transmission of the SSB may be provided depending on whether LBT succeeds in the very subsequent interval. The ‘N_shift’ value set at this time may be determined to be a single value or be set and defined in several sets. That is, as an example, like N_shift={a0}, a single shift value may be provided. Or, as an example, like N_shift={a0, a1, a2, . . . }, multiple shift value sets may be provided.
According to the embodiments described above, there may be provided a method and device for performing wireless communication in an unlicensed band to minimize the transmission/reception complexity of a synchronization signal block considering the results of an LBT upon transmitting a synchronization signal block for access in an unlicensed band.