Preemption indication for low latency communications on dynamically allocated resources

A method for wireless communication at a base station, comprising:

• identifying that a transmission time interval (TTI) is allocated for a first type of communications with a first user equipment (UE) in a first carrier;
• identifying downlink signals associated with a second type of communications to transmit to a second UE in the first carrier or that uplink signals associated with the second type of communications are to be received from the second UE in the first carrier;
• transmitting, in a second carrier, a control message indicating that a portion of the TTI is assigned for transmitting the downlink signals associated with the second type of communications or receiving the uplink signals associated with the second type of communications in the first carrier;
• determining that the second type of communications is to preempt the first type of communications in the portion of the TTI based at least in part on transmitting the control message;
• and
• communicating during the TTI based at least in part on transmitting the control message and on the determination.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify that a transmission time interval (TTI) is allocated for a first type of communications in a first carrier;
• receive, in a second carrier, a control message indicating that a portion of the TTI is assigned for a second type of communications in a downlink or uplink direction in the first carrier;
• determine that the second type of communications is to preempt the first type of communications in the portion of the TTI based at least in part on receiving the control message;
• and
• communicate during the TTI based at least in part on receiving the control message and on the determination.

An apparatus for wireless communication at a base station, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify that a transmission time interval (TTI) is allocated for a first type of communications with a first user equipment (UE) in a first carrier;
• identify downlink signals associated with a second type of communications to transmit to a second UE in the first carrier or that uplink signals associated with the second type of communications are to be received from the second UE in the first carrier;
• transmit, in a second carrier, a control message indicating that a portion of the TTI is assigned for transmitting the downlink signals associated with the second type of communications or receiving the uplink signals associated with the second type of communications in the first carrier;
• determine that the second type of communications is to preempt the first type of communications in the portion of the TTI based at least in part on transmitting the control message;
• and
• communicate during the TTI based at least in part on transmitting the control message and on the determination.