Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, information configuring an active bandwidth part (BWP) that does not include a bandwidth associated with one or more of a synchronization signal block (SSB) or a control resource set zero (CS0). The UE may perform, based at least in part on a radio frequency (RF) retune mode, an RF retune to a union bandwidth that covers the active BWP and the bandwidth associated with one or more of the SSB or the CS0. Numerous other aspects are described.

Abstract: Wireless communications systems and methods related to an uplink transmission cancellation mechanism that determines processing time for UEs configured with mixed processing capabilities are described. Specifically, methods and systems are provided for a UE to determine which processing capability to rely on to determine the minimum processing time for cancellation. For example, when a UE is configured with a faster processing capability and a slower processing capability, the UE may be configured to always rely on the faster, or the slower processing capability. Alternatively, the UE may be configured to consider factors such as the uplink channel type, uplink channel priority, the cause of the cancellation, the priority of uplink grant, or any combination thereof, to determine whether to rely on the faster or the slower capability to obtain the minimum processing time for cancellation.

Abstract: Methods, systems, and devices for wireless communications are described that provide for receive chain selection at a user equipment (UE) with efficient switching between a reduced number of receive chains and an increased number of receive chains for downlink communications based on conditions at the UE. A UE may adaptively adjust the number of active receive chains based on downlink grant activity, channel conditions, network parameters, or any combinations thereof. An estimator block at the UE may determine to adjust the number of receive chains based on a number of downlink grants within one or more time periods. In some cases, grants for an amount of data that exceeds a threshold may be qualified in order to be counted at the estimation block. Further, a transient state may be provided where the UE may maintain a higher number of active receive chains until UE feedback is provided.

Abstract: A user equipment (UE) may make a joint decision of adaptive receive diversity (ARD) and adaptive transmit diversity (ATD) configurations, including transmit (Tx) and receive (Rx) antennas selection and/or blanking based on downlink (DL) and uplink (UL) traffic conditions. The UE may disable at least one Tx chain for a transmission of a codebook-based sounding reference signal (SRS) (SRS-CB) based on one or more of at least one DL traffic condition or at least one UL traffic condition, and transmit, to a base station, upon disabling the at least one Tx chain, the SRS-CB via an antenna associated with at least one active Tx chain.

Abstract: Methods, systems, and devices for wireless communications are described that provide for antenna selection at a user equipment (UE). The UE may have a set of available antennas for uplink and downlink communications, and may select a first subset of antennas for uplink communications and a second subset of antennas for downlink communications. The first subset of antennas may be based on one or more uplink metrics, and the second subset of antennas may be based on the first subset of antennas and one or more downlink channel metrics, traffic amounts, or any combinations thereof.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may receive an indication of whether a first physical downlink shared channel (PDSCH) communication is to be punctured in a set of resources in which a second PDSCH communication at least partially overlaps with the first PDSCH communication, or both the first PDSCH communication and the second PDSCH communication are to be transmitted in the set of resources. The mobile station may decode the first PDSCH communication based at least in part on the indication. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a base station may interrupt a user equipment (UE) during transport block (TB) encoding. The UE may cancel transmission (e.g., suppress processing) of a TB based on the interruption, such that a first subset of code blocks is encoded and a second subset is unencoded. In some cases, the UE may receive a re-transmission request for a code block including cyclic redundancy check (CRC) bits for the TB, where the CRC bits are not prepared. In one example, the UE may modify the CRC bits (e.g., set them to a common value, drop them, etc.) to reduce processing time. In another example, the base station may request re-transmission of all preempted code blocks, supporting TB CRC calculation. In another example, the base station or UE may extend a processing timeline for the re-transmission to support TB CRC calculation.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may configure a bandwidth part (BWP) switching configuration of a user equipment in connection with a dual active protocol stack (DAPS) handover based at least in part on a BWP switching rule; and perform the DAPS handover. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications at a user equipment (UE) are described. Techniques are described herein for performing out-of-order processing. The UE may receive a first downlink channel at a first time and a second downlink channel at a second time. The UE may determine that a priority of the second downlink channel is different (e.g., higher) than a priority of the first downlink channel. The UE may determine that a first uplink transmission associated with the first downlink channel is to be transmitted after a second uplink transmission associated with the second channel based on the different priorities. The UE may set one or more operations based on these determinations. In some cases, the UE may suspend processing the of the first downlink channel to process the second downlink channel.

Abstract: Certain aspects of the present disclosure provide techniques for supporting control channel monitoring based on sub-carrier spacing (SCS).

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first downlink control information (DCI) at a first time, and may receive a second DCI at a second, later time. Each DCI may contain scheduling information for scheduling a number of transmissions at the UE. A transmission associated with the first DCI on a first cell may be scheduled to start before or during a transmission associated with the second DCI on a second cell. The UE may then determine priorities associated with the first and second cells. In cases where the priority of the second cell is greater than the priority of the first cell, the UE may transmit the second scheduled transmission before it transmits the first scheduled transmission. As a result, the UE may prioritize transmitting the second scheduled transmission before the first scheduled transmission.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits capability information indicating a maximum number of downlink resources for both positioning reference signal (PRS) resources and downlink resources for one or more second downlink channels or signals that the UE is capable of processing per unit of time, receives, from a serving transmission-reception point (TRP), a configuration of one or more downlink resources for the one or more second downlink channels or signals, wherein a number of the one or more downlink resources is less than the maximum number, and receives, from a location server, a configuration of one or more PRS resources for the serving TRP, one or more neighboring TRPs, or both, wherein a number of the one or more PRS resources is less than the maximum number.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, on a first carrier having a first subcarrier spacing (SCS), a scheduling indication via a physical downlink control channel (PDCCH) scheduling a downlink transmission on a second carrier having a second SCS. The UE may process the downlink transmission on the second carrier based at least in part on a delay between the PDCCH and the scheduled downlink transmission and a timing threshold having a basic term and an adjustment term. For example, the basic term may be based at least in part on a minimum delay between the PDCCH and the scheduled downlink transmission, and the adjustment term may be based at least in part on a processing time due to a difference between the first SCS and the second SCS. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. A UE may identify a capability for downlink control channel monitoring and uplink cancellation indication monitoring. The UE may transmit, to a base station, an indication of the identified uplink cancellation indication monitoring capability. The base station may receive the indication from the UE, and may configure monitoring occasions in a slot based on the received uplink cancellation indication monitoring capability. The base station may transmit via radio resource control signaling, and the UE may receive, a configuration which configures a number of monitoring occasions based on the uplink cancellation indication monitoring capability. The UE may then monitor the configured monitoring occasions according to the identified capability.

Abstract: Techniques for wireless communications are described. A user equipment (UE) may initially configure a set of channel estimation parameters for a set of radio frequency spectrum subbands of a bandwidth part (BWP) of a transmission opportunity (TxOP). In some examples, the UE may identify an unavailable radio frequency spectrum subband within the BWP. Based on the identification, the UE may reconfigure the channel estimation parameters to avoid performing unnecessary channel estimation processes on the unavailable radio frequency spectrum subband. As part of reconfiguring the channel estimation parameters, the UE may set log-likelihood ratio (LLR) values of subcarriers associated with the unavailable radio frequency spectrum subband to a null value, thereby experiencing improvements in efficiency and reliability of channel estimation for the BWP.

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for efficiently limiting a number of blind decoding attempts or control channel elements (CCEs) that a user equipment (UE) is configured to monitor to limit complexity at the UE. When a UE is configured to use blind decoding for monitoring CCEs in multiple spans in a slot for control information from a base station, the UE may be configured to perform dropping of blind decoding candidates or CCEs in a first temporal span in the slot. In other words, the UE may identify a dropping rule to drop CCE monitoring occasions or blind decoding attempts in excess of a maximum number of non-overlapping CCEs per span or a maximum number of blind decoding attempts per span, respectively, and the UE may apply the dropping rule to the first temporal span within the slot.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform, to a first base station and via a first radio frequency (RF) chain, at least a portion of a first uplink transmission associated with a first priority. The UE may receive, from the first base station or from a second base station and during the first uplink transmission, a physical downlink control channel (PDCCH) grant for a second uplink transmission associated with a second priority higher than the first priority. The UE may cancel a remaining portion of the first uplink transmission based at least in part on receiving the PDCCH grant for the second uplink transmission. The UE may perform, to the first base station or to the second base station and via a second RF chain, the second uplink transmission. 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 perform, to a first base station and via a first radio frequency (RF) chain associated with a first subscription, a first uplink transmission based at least in part on one or more of an uplink carrier aggregation capability of the UE or an uplink multiple-input multiple-output (MIMO) capability of the UE. The UE may perform, to the first base station or to a second base station, and via a second RF chain associated with a second subscription and configured to operate simultaneously with the first RF chain, a second uplink transmission based at least in part on one or more of the uplink carrier aggregation capability of the UE or the uplink MIMO capability of the UE. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. In one example, a method for wireless communications at a user equipment (UE) includes determining one or more performance metrics related to communications over a wireless channel and comparing the one or more performance metrics with a performance level for the communications over the wireless channel. The method may include selecting a power mode for the UE based at least in part on the comparing and determining an operating state of a subset of a plurality of radio frequency front end elements of at least one active radio frequency chain of the UE based at least in part on the power mode and a priority of the one or more performance metrics. The method may also include adjusting the subset of the plurality of radio frequency front end elements based at least in part on the operating state.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit assistance information to a base station to request an update or a modification to one or more communication parameters configured at the UE. Such communication parameters may include a quantity of uplink multiple-input multiple-output (MIMO) layers, a quantity of downlink MIMO layers, a minimum scheduling offset, a maximum quantity of component carriers, or a maximum aggregated bandwidth for a secondary cell group (SCG). In some implementations, the UE may transmit the assistance information requesting the update or modification to one or more of such communication parameters based on detecting that the UE satisfies one or more triggering conditions or thresholds.