A downlink control information (DCI) may be received. The DCI may comprise an uplink grant for the LAA cell. The uplink grant may comprise transmission parameters. The transmission parameter may comprise: uplink resources for one or more transport blocks (TBs), and an indication of a listen-before-talk (LBT) priority class. One or more first logical channels of the plurality of logical channels may be selected based on the LBT priority class. First uplink resources of the uplink resources to the one or more first logical channels may be allocated. Some remaining uplink resources of the uplink resources may be allocated to one or more second logical channels of the plurality of logical channels in response to the uplink resources not being exhausted. The one or more TBs may be transmitted on the LAA cell.