Sidelink and uplink prioritized cancellation

A method for wireless communications at a network device, comprising:

• transmitting a grant that indicates a set of time-frequency resources configured for sidelink or uplink communications for a user equipment (UE);
• determining a priority of a message for transmission via a portion of the set of time-frequency resources, the message being one of an uplink or a sidelink;
• transmitting, to the UE, a priority indication comprising a priority threshold, the priority indication instructing the UE to cancel transmissions having a second priority less than the priority threshold for the portion of the set of time-frequency resources based at least in part on the priority of the message;
• identifying a transmission of an uplink or sidelink message by a second UE via the portion of the set of time-frequency resources;
• and
• determining the priority threshold based at least in part on the uplink or sidelink message.

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

• a processor;
• and
• a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the apparatus to:
• receive a grant that indicates a set of time-frequency resources configured for sidelink or uplink communications for the UE;
• receive, from a network device, a priority indication comprising a priority threshold, the priority indication instructing the UE to cancel transmissions having a priority less than the priority threshold for at least a portion of the set of time-frequency resources;
• determine whether to transmit one or more messages via at least the portion of the set of time-frequency resources based at least in part on the priority indication;
• refrain from transmitting the one or more messages based at least in part on the one or more messages having a second priority less than the priority threshold;
• and
• transmit a preemption indication to a second UE indicating cancellation of transmission of the one or more messages from the UE.

An apparatus for wireless communications at a network device, comprising:

• a processor;
• and
• a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the apparatus to:
• transmit a grant that indicates a set of time-frequency resources configured for sidelink or uplink communications for a user equipment (UE);
• determine a priority of a message for transmission via a portion of the set of time-frequency resources, the message being one of an uplink or a sidelink;
• transmit, to the UE, a priority indication comprising a priority threshold, the priority indication instructing the UE to cancel transmissions having a second priority less than the priority threshold for the portion of the set of time-frequency resources based at least in part on the priority of the message;
• identify a transmission of an uplink message by a second UE via the portion of the set of time-frequency resources and;
• determine the priority threshold based at least in part on the uplink message.