Abstract: Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may transmit feedback signaling for received sidelink messages to both the base station and the transmitting UE. The receiving UE may multicast a feedback message to both the base station and the transmitting UE on a physical uplink control channel (PUCCH) or on a physical sidelink feedback channel (PSFCH). The base station may configure the receiving UE with resources, the transmitting UE may allocate resources to the receiving UE, or the base station may actively monitor for the feedback message. In some examples, the receiving UE may operate in a dual connectivity mode, and may transmit the feedback message to both the base station and the transmitting UE on both the PUCCH and the PSFCH.

Abstract: Certain aspects of the present disclosure provide techniques for channel access in an unlicensed spectrum. An example method of wireless communication by a user equipment includes receiving a resource grant indicating a plurality of resource candidates for an uplink signal. The method also includes sensing for energy, in response to the resource grant, over one or more of the resource candidates in a first sensing occasion before a transmission occasion of the uplink signal. The method further includes transmitting, during the transmission occasion, the uplink signal using a subset of the resource candidates selected based at least in part on energy sensed in the first sensing occasion.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a set of aggregation levels for a set of physical downlink control channel (PDCCH) candidates within a search space. The UE may decode a first subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated within a single PDCCH monitoring occasion, and a second subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, in a single dynamic signaling communication, an indication to activate one or more coverage enhancement parameters. The UE may activate the one or more coverage enhancement parameters based at least in part on receiving the indication. Numerous other aspects are provided.

Abstract: A user equipment (UE) detects a beam switching event and switches, in response to the beam switching event, a beam for communications on a first active component carrier. The UE applies a beam switch interruption time across one or more second active component carriers if a beam switching delay associated with the beam switch exceeds a threshold value.

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for performing separate channel sensing procedures for transmissions via a mobile termination (MT) role and for transmissions via a distributed unit (DU) role of an integrated access and backhaul (IAB) node. In one aspect, the IAB node may obtain channel access for transmissions via the MT role by performing a first channel sensing procedure and may obtain channel access for transmissions via the DU role by performing a second channel sensing procedure. The IAB node may determine a first timing of a first sensing slot for performing the first channel sensing procedure and a second timing of a second sensing slot for performing the second channel sensing procedure in accordance with a capability of the IAB node and a transmission timing of the transmissions via the MT role and the DU role.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a channel access procedure associated with a transmission of a sidelink communication that is to be associated with resources that are associated with a first configured grant configuration, wherein the channel access procedure is unsuccessful, wherein the sidelink communication is associated with a hybrid automatic repeat request (HARQ) process identifier, and wherein a state associated with the HARQ process identifier is changed to pending based on the channel access procedure being unsuccessful. The UE may transmit, based on successfully performing another channel access procedure, a retransmission of the sidelink communication using resources associated with the first configured grant configuration or a second configured grant configuration based on the state associated with the HARQ process identifier being changed to pending. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A receiving device may receive (e.g., from a transmitting device) one or more control messages indicating a first physical resource block (PRB) bundling size for a first set of two or more layers of a downlink shared channel and a second PRB bundling size for a second set of two or more layers of the downlink shared channel. The receiving device may receive a downlink transmission (e.g., a downlink shared channel transmission) that includes multiple codewords, such as a first codeword corresponding to the first set of two or more layers and a second codeword corresponding to the second set of two or more layers. The receiving device may receive the downlink transmission and may decode each codeword based on one or more channel estimates using the first PRB bundling size and the second PRB bundling size.

Abstract: A base station may transmit at least one configuration of at least one set of one or more TD RS occasions associated with at least one type of reference signal measurement and an indication to dynamically activate or deactivate at least one pattern of the one or more TD RS occasions. A UE may receive one or more TD RS in at least one set of one or more TD RS occasions based on at least one configuration and the one or more of the at least one pattern of the one or more TD RS occasions.

Abstract: Methods, systems, and devices for wireless communications are described. For example, a first communication device may receive, from a second communication device, control signaling triggering a channel access procedure at the first communication device. In some case, the channel access procedure may be for accessing the shared radio frequency spectrum. The first communication device may then perform the channel access procedure based on the control signaling. In some examples, the first communication device may, based on the channel access procedure, transmit an indication of a channel occupancy initiated by the first communication device to the second communication device. The first communication device may relay communications between the second communication device and a third communication device during a channel occupancy time (COT) based on the transmitted indication of the channel occupancy initiated by the first communication device.

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support techniques for operating repeaters based on sub-band power measurements. According to some aspects, sub-band-based power measurements may also allow a repeater to acquire other side information, e.g., time division duplex (TDD) downlink/uplink information or beam configuration information, more accurately. In aspects, a repeater determines one or more sub-band received-signal powers associated with one or more sub-bands of a bandwidth available for wireless communication, amplifies one or more signals received within at least one of the one or more sub-bands, and transmits the amplified one or more signals to at least one of a user equipment (UE) or a base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive a configuration for periodic communications, wherein the configuration indicates a periodicity for the periodic communications. The wireless communication device may receive an indication of whether the periodicity applies to at least one of full duplex resources or half duplex resources. The wireless communication device may communicate based at least in part on the configuration for periodic communications, the periodicity, and the indication. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication that one or more semi-persistent scheduling (SPS) occasions, within a periodic set of SPS occasions, will be skipped. Accordingly, the UE may refrain from monitoring, for signals from the base station, during the one or more SPS occasions that are skipped. Additionally, in some aspects, the UE may refrain from transmitting, to the base station, acknowledgment feedback associated with the one or more SPS occasions that are skipped. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a grant associated with a plurality of physical shared channel resources. The UE may transmit a communication, associated with the grant, including a downlink assignment index field with a value calculated based at least in part on the plurality of physical shared channels, wherein a configuration of the downlink assignment index field is based at least in part on a quantity of start and length indicator values configured for the UE. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify one or more channel occupancy times (COTs) associated with a first radio access technology (RAT) on an unlicensed band. The UE may calculate a congestion control parameter associated with a second RAT on the unlicensed band, wherein the congestion control parameter is calculated by excluding sub-channels in the one or more COTs. The UE may use the congestion control parameter to communicate via the unlicensed band. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an uplink grant scheduling an uplink transmission that is not aligned with a fixed frame period (FFP) boundary configured for the UE. The UE may receive downlink control information (DCI) including an indication that the UE is to initiate a channel occupancy time (COT) acquisition in association with transmitting the uplink transmission. The UE may modify the indication based at least in part on the uplink transmission not being aligned with the FFP boundary and the indication indicating that the UE is to initiate the COT acquisition. The UE may transmit the uplink transmission based at least in part on the uplink grant and after the modification of the indication. Numerous other aspects are described.

Abstract: This disclosure provides systems, methods and apparatus for wireless communications. In one aspect, a device, such as a user equipment (UE) may receive a configuration including one or more channel state information (CSI) measurement resources associated with a set of CSI hypotheses. The set of CSI hypotheses may correspond to a set of transmission configuration indicator (TCI) states, or a CSI interference measurement (CSIIM) resource, or both. The UE may select a first CSI measurement resource of the one or more CSI measurement resources for a channel measurement based on a CSI hypothesis of the set of CSI hypotheses. The UE also may select the CSIIM resource or a second CSI measurement resource for an interference measurement based on the CSI hypothesis of the set of CSI hypotheses. The UE may, as a result, transmit a report based on the channel measurement or the interference measurement, or both.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first control signaling identifying a demodulation reference signal (DMRS) pattern that may be uniformly distributed in a time domain and a frequency domain. The DMRS pattern may include a first set of resource elements for the DMRS, a second set of resource elements for guard tones adjacent to and greater in frequency than the first set of resource elements, and a third set of resource elements for guard tones adjacent to and lower in frequency than the first set of resource elements. The UE may receive second control signaling that schedules a data signal to be communicated between the UE and a network node in a set of time-frequency resources. The UE may communicate the data signal according to the second control signaling and the DMRS according to the DMRS pattern.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling scheduling a frequency division multiplexed (FDM) uplink shared channel message. The control signaling may include a resource allocation for a set of resource blocks (RBs), the resource allocation indicating an interlace assignment and an RB set assignment. The UE may allocate, according to a rule, the set of RBs into a first group of RBs and a second group of RBs based on the interlace assignment and the RB set assignment. The UE may transmit the FDM uplink shared channel message including the first group of RBs and the second group of RBs. The first group of RBs may be transmitted in accordance with a first set of transmission parameters and the second group of RBs may be transmitted in accordance with a second set of transmission parameters.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station (BS), a channel state information reference signal (CSI-RS) communication; and transmit, to the BS, a physical uplink control channel communication including feedback information that is a response to the CSI-RS communication and including an interference measurement. Numerous other aspects are provided.