Abstract: Certain aspects of the present disclosure provide techniques for beam failure detection and recovery. A method that may be performed by a user equipment (UE) includes monitoring one or more reference signals for beam failure detection for a plurality of component carriers (CCs), detecting a beam failure for a subset of one or more CCs of the plurality of CCs based on the one or more reference signals, generating a beam failure recovery request (BFRQ) indicating that a beam failure has occurred for the plurality of CCs in response to the detection of the beam failure for the subset of one or more CCs, and transmitting the BFRQ.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message triggering the UE to perform an iterative joint beam pair selection procedure for selecting a receive beam and a transmission beam. In some cases, the UE may additionally receive control signaling from the base station configuring the UE to generate a measurement report associated with the receive beam (e.g., that is associated with a first and second port of the UE). The UE may then receive a reference signal via the receive beam. Based on receiving the reference signal, the UE may transmit the measurement report to the base station, where the measurement report indicates at least one measurement, a first resource index corresponding to the first port of the UE, and a second resource index corresponding to the second port of the UE.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may generate a recommendation for a first codebook that is for a single transmit receive point (TRP) and that does not include a time domain (TD) or Doppler domain (DD) basis, or for a second codebook that is for multiple TRPs or that includes a TD or DD basis. The UE may transmit the recommendation. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for transmitting precoding matrix indicators (PMIs) for rank indications (RIs) and receiving coherent joint transmission (CJT) channels based on the PMIs. A method that may be performed at a user equipment (UE) includes outputting, for transmission, a report comprising a precoding matrix indicator (PMI) for a rank indication (RI); and obtaining, based on the PMI, a coherent joint transmission (CJT) physical downlink shared channel (PDSCH) having a rank, M, less than or equal to the RI.

Abstract: This disclosure provides methods, devices and systems for beamforming in wireless communications. Some implementations more specifically relate to beamforming configurations for multicast communications. A transmitting device may transmit multicast data to multiple receiving devices, concurrently, via a physical downlink shared channel (PDSCH). The PDSCH may be preceded by a physical downlink control channel (PDCCH). The PDCCH may provide scheduling information for the PDSCH, including a multicast beam associated with the PDSCH and a timing offset or delay between the PDCCH and the PDSCH. A receiving device may determine that the PDSCH contains multicast data based on an indication in the PDCCH. To receive the PDSCH, each receiving device may tune its antennas in a direction of the scheduled multicast beam or a default beam based on the delay between the PDCCH and the PDSCH.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message indicating at least two precoding matrices and a set of weighting coefficients. The at least two precoding matrices and the set of weighting coefficients may be indicated to the UE for deriving a precoder for uplink transmission from the at least two precoding matrices. The UE may derive the precoder for transmission of an uplink message based on interpolating or extrapolating the at least two precoding matrices using the set of weighting coefficients. The UE may transmit the uplink message. The uplink message may be precoded using the precoder.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (LIE) may select uplink communication resources to be used to transmit enhanced uplink control information (UCI) to a base station based at least in part on a size of a hybrid automatic repeat request (HARQ) codebook and an enhancement number, and transmit the enhanced UCI using the selected uplink communication resources, the enhanced UCI comprising a set of feedback bits and a set of enhancement bits, the set of feedback bits comprising at least one negative acknowledgement (NACK) bit, and wherein the set of enhancement hits indicate information associated with the at least one NACK bit. Numerous other aspects are provided.

Abstract: Apparatus, methods, and computer-readable media for facilitating spatial relation indication for uplink control channels and SRS are disclosed herein. An example method for wireless communication at a UE includes determining, based on a rule, a default uplink transmit beam for transmitting an uplink transmission when an uplink transmit beam is not configured by a base station for the uplink transmission. The example method also includes transmitting, to the base station, the uplink transmission on the default uplink transmit beam.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, via a first carrier, an indication of an offset for scheduling a reference signal on a second carrier, wherein the offset indicates a duration between downlink control information (DCI), that schedules the reference signal, and the reference signal; determine a first numerology of the first carrier and a second numerology of the second carrier; and determine a time offset for the reference signal based at least in part on the offset and at least one of the first numerology, the second numerology, or both the first numerology and the second numerology. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. The method may include a user equipment (UE) receiving, from a network node, a message that indicates for the UE to generate a periodic channel state information (CSI) report including refinement information with respect to a previously CSI report. The UE may receive one or more demodulation reference signals (DMRSs) during one or more semi-persistent scheduling (SPS) occasions and generate the CSI report, where the refinement information included in the CSI report is based on measurements of the received one or more DMRSs. The UE may then transmit the CSI report to the network node.

Abstract: Apparatus, methods, and computer-readable media for facilitating beam management enhancements in model-based channel tracking are disclosed herein. An example method for wireless communication at a first network entity includes receiving from a second network entity, a model configuration indicative of a model condition of a channel between the first network entity and the second network entity for multiple beam pairs. The example method also includes tracking a variation in a channel condition relative to the model condition of the channel based on the model configuration for each of multiple beam pairs separately in multiple tracking sessions that overlap in time. Each beam pair may include a transmission beam and a reception beam.

Abstract: Aspects relate to techniques for activating transmission configuration indicator (TCI) states based on a TCI state update list including a plurality of component carriers. A TCI state activation message for a physical downlink control channel (PDCCH) can include two TCI states for single frequency network (SFN) operation of a control resource set (CORESET) associated with a serving cell ID. A user equipment (UE) may receive the TCI state activation message and activate at least one of the two TCI states for each component carrier in the TCI state update list in response to the TCI state update list including the serving cell ID and based on a respective SFN configuration of each of the component carriers.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may configure a user equipment (UE) with a list of transmission configuration indicator (TCI) state patterns where each entry in the list may correspond to a different TCI state pattern. The base station may transmit an indication of a selected entry from the TCI state pattern list and transmit a grant to the UE indicating that resources have been allocated in for transmitting a transport block (TB). The UE may receive the grant and attempt to receive the TB in accordance with the indicated TCI state pattern. The UE may generate multi-bit feedback to indicate whether the UE was able to successfully decode the TB and transmit the feedback to the base station. The base station may use the multi-bit feedback for determining whether to select a different TCI state pattern.

Abstract: An apparatus for wireless communication by a user equipment (UE) includes a receiver and a transmitter. The receiver is configured to receive a message indicating power adjustment information associated with one or more transmission and reception points (TRPs) and to receive a transmission of a reference signal via the one or more TRPs. The transmitter is configured to transmit, in accordance with the power adjustment information and the transmission of the reference signal, a measurement report indicating precoder information associated with the one or more TRPs.

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a user equipment (UE) may support communications with a set of transmission/reception points (TRPs). The UE may receive one or more signals from at least one TRP of the set of TRPs. The one or more signals may indicate a condition corresponding to the UE for the multi-TRP communications. The UE may determine the condition of the UE based on the one or more signals. The UE may communicate with one or more TRPs of the set of TRPs based on the one or more signals. For example, the UE may communicate with the one or more TRPs according to a multi-TRP communications configuration determined based on the condition of the UE.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a reporting configuration that may include a number of channel measurement or interference measurement resource sets that the UE may measure in accordance with one or more reporting quantities. Based on receiving multiple resource sets in a reporting configuration from the base station, the UE may generate and transmit a measurement report including resource sets contained in the reporting configuration. This may allow the UE to report different report quantities between different resource sets indicated by a base station. In addition, the UE may be configured to rank measurements using different reporting quantities. The report configuration may configure the UE to perform measurements of different resources in accordance with one or more reporting quantities, and the UE may apply a rule to rank different measurements based on the indicated reporting quantities.

Abstract: Certain aspects of the present disclosure provide techniques for configuration of resources to determine signal-to-interference-plus-noise ratio (SINR). A method that may be performed by a user equipment (UE) includes transmitting, to a base station (BS), an indication that the UE is configured with at least one capability to support a combination of a channel measurement resource (CMR) and at least one interference measurement resource (IMR), if group based beam reporting is configured, receiving a reference signal (RS) resource setting for the CMR to perform channel measurement based, at least in part, on the capability of the UE, receiving at least one RS resource setting for the at least one IMR to perform interference measurement based, at least in part, on the capability of the UE, determining at least one signal-to-interference-plus-noise ratio (SINR) parameter based on results of performing the channel measurement and the interference measurement, and transmitting the SINR parameter to the BS.

Abstract: One innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication. The method includes determining a configuration of reference signal (RS) resources to be used by a user-equipment (UE) to perform beam measurements, transmitting, to the UE, an indication of the configuration of the RS resources, and receiving, from the UE, a report indicating a plurality of RS resource indicators based on the beam measurements, each of the RS resource indicators being associated with one of the RS resources. In some aspects, the BS selects a subset of the RS resources based on the report from the UE, transmits, to the UE, an indication to provide channel measurement information for the subset of the RS resources, and receives a report including the channel measurement information from the UE. The BS may also perform joint precoding of signals for transmission via the RS resources based on the channel measurement information.

Abstract: A configuration for configuring and updating the spatial relationship of multiple physical uplink control channel (PUCCH) resources in a single message, thereby reducing signaling overhead. A user equipment (UE) constructs a message associated with at least one of a plurality of component carriers (CCs) or a plurality of bandwidth parts (BWPs) indicating a same spatial relation for the at least one of the plurality of CCs or the plurality of BWPs. The UE transmits the message to a base station. The base station transmits a message to the UE configuring multiple spatial parameters for the at least one of the plurality of CCs, the plurality of BWPs, or a plurality of uplink/downlink resources.

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for tracking channel variations via a model-based representation of the channel. A first network entity may receive from a second network entity or transmit to the second network entity, a model configuration indicative of a model condition of a channel between the first network entity and the second network entity. The model configuration may be associated with one or more initial parameters. The first network entity may receive a reference signal from the second network entity to measure a condition of the channel between the first network entity and the second network entity, and transmit, to the second network entity, one or more updated parameters for the model configuration based on a measurement of the condition of the channel in comparison to the model condition of the channel based on the model configuration.