Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a quantity M of selected frequency domain (FD) bases for channel state information (CSI) reporting that represents a total quantity of selected FD bases across multiple transmit receive points (TRPs) or TRP groups, independent of selected TRPs for a CSI report. The UE may select FD bases for the CSI report based at least in part on M. The UE may transmit the CSI report based at least in part on measurements of one or more CSI reference signals, using the FD bases for the CSI report. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for uplink scheduling for communication on an uplink from a user equipment (UE) to a base station (BS). The uplink scheduling is based on uplink transmission (UL Tx) switching time and/or uplink data preparation time of the UE. The uplink data preparation time is calculated based on the UL Tx switching time. For example, a UE can report to a BS at least one of an indication of a UL Tx switching time and an uplink data preparation time of the UE. In return, the UE can receive an indication of uplink scheduling from the BS, which the UE can use to communicate with the BS.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communications. One aspect provides a method of wireless communications by a user equipment (UE), the method including receiving, from a network entity, a reference signal; processing the reference signal with a machine learning model to generate machine learning model output; and determining an action to take based on the machine learning model output and a model monitoring configuration.

Abstract: Certain aspects of the present disclosure provide techniques for precoder matrix quantization for compressed channel state information (CSI) feedback. A method for wireless communications by a user equipment (UE) includes receiving a CSI report configuration for frequency domain compressed precoder matrix feedback. The CSI report configuration configures the UE to report, for a plurality of selected beams at a plurality of time domain taps, a frequency domain compression basis vector and a plurality of linear combination coefficients associated with the frequency domain compression. For each of the beams, the UE groups the time domain taps into at least first and second groups. The groups each can have zero, one, or more than one time domain taps. The UE quantizes the corresponding linear combination coefficients and/or frequency domain compression basis vectors based on the grouping.

Abstract: Various aspects of the present disclosure generally relate to multi-slot transmission time interval based channel state information (CSI) and uplink shared channel (UL-SCH) multiplexing. In some aspects, a user equipment (UE) may receive a downlink control information (DCI) message and determine, based at least in part on the DCI message, a schedule for multiplexing UL-SCH data and one or more components of uplink control information (UCI) in a plurality of slots on a physical uplink shared channel (PUSCH). The components may include a CSI report for a plurality of transmission reception points. The UE may multiplex the UL-SCH data and the one or more components into the plurality of slots based at least in part on the schedule. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability report to a base station indicating a triggering offset. The base station may configure the UE with one or more channel state information (CSI) measurement resources and send downlink control information (DCI) that triggers an aperiodic CSI report for some of the CSI measurement resources. The UE may report CSI by measuring the CSI resources after the triggering offset. In some cases, CSI reporting related to the different codebook types (e. g., Type I, Type II) may be modified, where after identifying a type of codebook and determining which type of codebook to process (e. g., based on a number of CSI processing units), the UE may identify a priority associated with different CSI reports. The UE may be configured with various parameters that relax or modify the processing of Type II CSI reports.

Abstract: Wireless communications systems and methods related to multi-transmission-reception point (multi-TRP) precoding matrix indication (PMI) operations are provided. A user equipment (UE) receives a configuration indicating a precoder size parameter for a plurality of transmission-reception points (TRPs). The UE receives, from a first TRP of the plurality of TRPs, a first reference signal. The UE receives, from a second TRP of the plurality of TRPs, a second reference signal, the second TRP being different from first TRP. The UE transmits, to the first TRP or the second TRP, a channel state information (CSI) report including a first feedback component based on the first reference signal and a second feedback component based on the second reference signal, where a combined payload size of the first feedback component and the second feedback component is based on the precoder size parameter.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for reporting channel state information (CSI) for multiple transmit receive points (TRPs), the configuration specifying a TRP data structure that maps TRP index values to TRPs. The UE may select one or more TRPs from the multiple TRPs for a CSI report. The UE may select a TRP index value from the TRP data structure based at least in part on the one or more TRPs selected for the CSI report. The UE may transmit the TRP index value with the CSI report. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communications by a user equipment (UE), generally including obtaining a set of key performance indicators (KPIs) for a machine learning (ML) model running on the UE and transmitting, to an entity associated with the ML model, a report including an aggregation of the KPIs and additional performance feedback for the ML model.

Abstract: A method includes receiving, by a user equipment (UE) device, a joint transmission of channel state information (CSI) reference signals (CSI-RS) from a first transmission and reception point (TRP) associated with a wireless network and at least a second TRP associated with the wireless network. The method further includes determining a joint rank parameter associated with the joint transmission and accessing, based on the joint rank parameter, a rank-to-port mapping codebook to determine a port index parameter. The method further includes, after determining the port index parameter, communicating, by the UE device, with one or more of the first TRP or the second TRP. Other aspects and features are also claimed and described.

Abstract: A method for wireless communication by a user equipment (UE) includes receiving a message scheduling a physical uplink shared channel (PUSCH). The method also includes determining that a quantity of resources allocated for channel state information (CSI) reporting via the PUSCH is insufficient for transmitting a CSI report for a coherent joint transmission (CJT) associated with transmit and receive points (TRPs). Each TRP may be associated with a set of CSI components. The method further includes prioritizing the CSI components based on a TRP priority rule. The method still further includes omitting one or more CSI components from the prioritized CSI components. The method also includes transmitting, to one or more TRPs, the CSI report comprising remaining CSI components based on omitting the one or more CSI components.

Abstract: The frequency domain basis may be fed back in a CSI report from a user equipment (UE), with extra overhead and computation cost. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE configured to receive, from a base station, CSI reference signals (CSI-RS). The apparatus may be further configured to receive, from the base station, a configuration including a frequency domain basis restriction indicating a frequency domain basis subset, where the frequency domain basis subset is selected from a frequency domain basis set. The apparatus may be configured to prepare, upon receiving the frequency domain basis restriction, a CSI report based on the CSI-RS and the frequency domain basis subset. The apparatus may be further configured to transmit the CSI report to the base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, configuration information indicating a set of channel state information (CSI) hypotheses associated with coherent joint transmission (CJT) CSI estimations. The UE may transmit, to the network entity, a ((CSI) report indicating one or more (CSI) reference signal (CSI-RS) resource indicators (CRIs) associated with one or more (CSI) hypotheses of the set of (CSI) hypotheses, wherein each CRI of the one or more CRIs is associated with a respective CSI hypothesis from the one or more (CSI) hypotheses. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency domain (FD) compression and, more particularly, to techniques for reporting frequency domain (FD) bases with a reference index across layers.

Abstract: Methods, systems, and devices for wireless communications are described. The methods, systems, and devices may enable a user equipment (UE) to receive a sounding reference signal (SRS) configuration message that indicates one or more first reference signals from a first node or one or more SRS transmission beams associated with the first node and one or more second reference signals from a second node. The UE may determine an SRS transmission beam for transmitting an SRS signal based on a procedure for determining SRS transmission beams and the one or more reference signals from the first and second nodes. The UE may transmit the SRS signal using the SRS transmission beam.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a message that indicates a channel state information (CSI) report configuration that identifies a quantity of CSI reports to be transmitted by the UE. The UE may generate, based on the CSI report configuration, a full CSI report and one or more partial CSI reports. The full CSI report may include at least a set of spatial domain basis functions and a set of channel coefficients associated with the set of spatial domain basis functions. The one or more partial CSI reports each include a respective set of differential channel coefficients. The UE may transmit the quantity of CSI reports. The quantity of CSI reports may include the full CSI report and the one or more partial CSI reports.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration associated with a non-orthogonal discrete Fourier transform (DFT) codebook for channel state information (CSI) in a time domain. Accordingly, the UE may transmit a CSI report based at least in part on the non-orthogonal DFT codebook. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive channel state information (CSI) reference signals (CSI-RSs) from multiple transmission reception points (TRPs) and may perform measurements on the CSI-RSs. The UE may then select a subset of the multiple TRPs with which to communicate, and the UE may transmit an indication of the selected TRPs in a CSI report. In some cases, the UE may indicate a common subset of TRPs with which the UE may communicate on multiple layers, or the UE may indicate a respective subset of TRPs with which the UE may communicate on each layer of multiple layers. The UE may also provide additional information in the CSI report for the selected TRPs. The selected TRPs may then use the additional information provided in the CSI report to identify suitable configurations for communicating with the UE.

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may support multiple component carriers that may be used to transmit uplink transmissions. One carrier may be used at a time such that the UE may switch between the carriers based on an uplink transmission schedule. In some cases, switching may be limited by a consecutive uplink switching rule or UE capability. In some cases, the gap between two consecutive uplink carrier switching operations may be limited to a resource (e.g., slot, symbol), such that the UE may expect to perform at most one switching operation per resource. In some implementations, the gap between two consecutive uplink carrier switching operations may be limited to a duration (e.g., 14 symbols, 4 symbols), such that the UE may expect to perform at most one switching operation per a duration less than or equal to a threshold.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an aerial user equipment (UE) may measure a first offset associated with a downlink frame based at least in part on a time when a downlink signal is received from a terrestrial base station. The aerial UE may determine a second offset corresponding to a starting time for the downlink frame at the terrestrial base station. The aerial UE may transmit an uplink message in an uplink frame using a timing advance that is based at least in part on a value of the first offset and a value of the second offset relative to a starting time associated with a global navigation satellite system frame duration. Numerous other aspects are described.