A method for wireless communication at a base station is described. The method may include identifying a carrier to be used for uplink transmissions from a UE, determining whether to transmit preemption indications or permission indications pertaining to the uplink transmissions on the carrier, where a preemption indication indicates that an uplink transmission is to be preempted for another transmission and a permission indication indicates that the UE has permission to transmit an uplink transmission, and transmitting a control message indicating whether future indications transmitted to the UE and pertaining to the uplink transmissions on the carrier are to be interpreted as preemption indications or permission indications based on the determination.
An apparatus for wireless communication at a base station is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to identify a carrier to be used for uplink transmissions from a UE, determine whether to transmit preemption indications or permission indications pertaining to the uplink transmissions on the carrier, where a preemption indication indicates that an uplink transmission is to be preempted for another transmission and a permission indication indicates that the UE has permission to transmit an uplink transmission, and transmit a control message indicating whether future indications transmitted to the UE and pertaining to the uplink transmissions on the carrier are to be interpreted as preemption indications or permission indications based on the determination.