A method, comprising: at a wireless device : receiving reservation information from a cellular base station , wherein the reservation information includes a reservation of a wireless medium for a transmit opportunity, TXOP, of an indicated length; receiving slot format information from the cellular base station indicating a schedule of one or more uplink and/or downlink transmission slots for communication between the wireless device and the cellular base station during the TXOP, wherein transmission slot formats of the uplink and/or downlink transmission slots are from a plurality of transmission slot formats including unidirectional uplink and downlink and bidirectional uplink and downlink transmission slot formats; and performing wireless communication with the cellular base station according to the schedule of one or more uplink and/or downlink transmission slots, wherein, when the one or more uplink and/or downlink transmission slots comprises an uplink transmission for the wireless device, the method further comprises: determining whether the uplink transmission is within the TXOP; and selecting a type of listen-before-talk procedure, from a plurality of types of listen-before-talk procedures including a short listen-before-talk procedure performed during a 1/2 symbol switching gap between uplink and downlink symbols and a full listen-before-talk procedure, to perform prior to the uplink transmission, wherein the short listen-before-talk procedure is selected if the uplink transmission is within the TXOP and the full listen-before-talk procedure is selected otherwise. receiving reservation information from a cellular base station , wherein the reservation information includes a reservation of a wireless medium for a transmit opportunity, TXOP, of an indicated length; receiving slot format information from the cellular base station indicating a schedule of one or more uplink and/or downlink transmission slots for communication between the wireless device and the cellular base station during the TXOP, wherein transmission slot formats of the uplink and/or downlink transmission slots are from a plurality of transmission slot formats including unidirectional uplink and downlink and bidirectional uplink and downlink transmission slot formats; and performing wireless communication with the cellular base station according to the schedule of one or more uplink and/or downlink transmission slots, wherein, when the one or more uplink and/or downlink transmission slots comprises an uplink transmission for the wireless device, the method further comprises: determining whether the uplink transmission is within the TXOP; and selecting a type of listen-before-talk procedure, from a plurality of types of listen-before-talk procedures including a short listen-before-talk procedure performed during a 1/2 symbol switching gap between uplink and downlink symbols and a full listen-before-talk procedure, to perform prior to the uplink transmission, wherein the short listen-before-talk procedure is selected if the uplink transmission is within the TXOP and the full listen-before-talk procedure is selected otherwise. determining whether the uplink transmission is within the TXOP; and selecting a type of listen-before-talk procedure, from a plurality of types of listen-before-talk procedures including a short listen-before-talk procedure performed during a 1/2 symbol switching gap between uplink and downlink symbols and a full listen-before-talk procedure, to perform prior to the uplink transmission, wherein the short listen-before-talk procedure is selected if the uplink transmission is within the TXOP and the full listen-before-talk procedure is selected otherwise. <EOS>