Abstract: Methods, systems, and devices for wireless communications are described that provide for sidelink preemption. In some examples, a base station may transmit a preemption indication to instruct a user equipment (UE) to refrain from transmitting on a set of resources. In some examples, the preemption indication may be transmitted to a UE through a relay UE, which may adjust timing or resources of the preemption indication, include receipt or generation info of the preemption indication, or refrain from transmitting the preemption indication. Additionally, or alternatively, one or more sidelink UEs may infer a preemption indication from an uplink cancellation indication, and may refrain from performing sidelink communications based on the preemption indication.

Abstract: Methods, systems, and apparatuses are described for flexible transmissions on one or more frequency division duplexing resources. In some aspects, a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station is identified for reallocation, and the identified subset of resources is reallocated to transmissions in a time division duplex (TDD) mode of operation, for example, associated with a second base station.