An apparatus (300, 302 1, 302 2) for a wideband communication in a wireless communication system, wherein, for a wideband communication with one or more transceivers in the wireless communication system using one or more subbands (200 1 -200 4) of a predefined wideband, the apparatus (300, 302 1, 302 2) is configured to • perform an initial Listen-Before-Talk, LBT, for each subband (200 1 -200 4) of the predefined wideband so as to determine from the predefined wideband one or more non-occupied subbands (200 2 -200 4) on which the wideband communication is allowed during a certain transmission time, and • during the certain transmission time, transmit to and/or receive from the one or more transceivers using the non-occupied subbands (200 2 -200 4), wherein, during the certain transmission time and in case the initial LBT indicated that one or more of the subbands are occupied, the apparatus (300, 302 1, 302 2) is configured to • perform a further LBT for the one or more occupied subbands (200 1) so as to determine one or more of the initially occupied subbands (200 1) being no longer occupied, and • transmit to and/or receive from the one or more transceivers using, in addition to the initially non-occupied subbands (200 2 -200 4), the one or more no longer occupied subbands (200 1), wherein the apparatus (300, 302 1, 302 2) is configured to signal to the one or more transceivers that the no longer occupied subbands (200 1) are available, wherein the apparatus (300, 302 1, 302 2) is configured to provide a control message (202 1 -202 3) to the one or more transceivers, the control message (202 1 -202 3) indicating the no longer occupied subbands (200 1), and characterized in that, for performing the further LBT, the apparatus (300, 302 1, 302 2) is configured to continue performing the further LBT on the one or more occupied subbands (200 1) while transmitting/receiving using the one or more non-occupied subbands (200 2 -200 4). wherein, for a wideband communication with one or more transceivers in the wireless communication system using one or more subbands (200 1 -200 4) of a predefined wideband, the apparatus (300, 302 1, 302 2) is configured to • perform an initial Listen-Before-Talk, LBT, for each subband (200 1 -200 4) of the predefined wideband so as to determine from the predefined wideband one or more non-occupied subbands (200 2 -200 4) on which the wideband communication is allowed during a certain transmission time, and • during the certain transmission time, transmit to and/or receive from the one or more transceivers using the non-occupied subbands (200 2 -200 4), • perform an initial Listen-Before-Talk, LBT, for each subband (200 1 -200 4) of the predefined wideband so as to determine from the predefined wideband one or more non-occupied subbands (200 2 -200 4) on which the wideband communication is allowed during a certain transmission time, and • during the certain transmission time, transmit to and/or receive from the one or more transceivers using the non-occupied subbands (200 2 -200 4), wherein, during the certain transmission time and in case the initial LBT indicated that one or more of the subbands are occupied, the apparatus (300, 302 1, 302 2) is configured to • perform a further LBT for the one or more occupied subbands (200 1) so as to determine one or more of the initially occupied subbands (200 1) being no longer occupied, and • transmit to and/or receive from the one or more transceivers using, in addition to the initially non-occupied subbands (200 2 -200 4), the one or more no longer occupied subbands (200 1), • perform a further LBT for the one or more occupied subbands (200 1) so as to determine one or more of the initially occupied subbands (200 1) being no longer occupied, and • transmit to and/or receive from the one or more transceivers using, in addition to the initially non-occupied subbands (200 2 -200 4), the one or more no longer occupied subbands (200 1), wherein the apparatus (300, 302 1, 302 2) is configured to signal to the one or more transceivers that the no longer occupied subbands (200 1) are available, wherein the apparatus (300, 302 1, 302 2) is configured to provide a control message (202 1 -202 3) to the one or more transceivers, the control message (202 1 -202 3) indicating the no longer occupied subbands (200 1), and characterized in that, for performing the further LBT, the apparatus (300, 302 1, 302 2) is configured to continue performing the further LBT on the one or more occupied subbands (200 1) while transmitting/receiving using the one or more non-occupied subbands (200 2 -200 4).