Abstract: Aspects of the present disclosure relate to retransmissions of data within wireless communication networks. For a retransmission, at least a portion of the encoded bits of an original transmission may be mapped to different bit locations in one or more modulated symbols based on a non-random mapping rule. In some examples, the encoded bits of a symbol may be reversed within the symbol for a retransmission. In other examples, the first and last encoded bits within a symbol may be switched for a retransmission. Other non-random mapping rules, such as a bit location offset, may also be used to map encoded bits to different bit locations in the modulated symbol within a retransmission.

Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may identify a duration of a slot used for communications with a receiving device. The transmitting device may determine that the communications with the receiving device comprises frequency division duplexing (FDD) communications. The transmitting device may transmit communications to the receiving device during a first portion of the slot, a duration of the first portion being less than the duration of the slot and the duration of the first portion is based at least in part on the determination that the communications comprise FDD communications. The transmitting device may select, based at least in part on the determination that the communications comprise FDD communications and that the communications are transmitted during the first portion of the slot, a hybrid automatic repeat request (HARQ) scheme to use during the communications.

Abstract: Systems, methods and apparatus select a code book based on channel conditions and performance of a demodulator or demapper in a wireless receiver. The method may include determining that the receiver in a first wireless communication apparatus is configured for iteratively processing signals received from a channel, selecting a code book for use in communicating over the channel based on conditions affecting transmission of the signals through the channel and performance information associated with a demapper in the receiver, and identifying the selected code book in one or more control channels transmitted to a second wireless communication apparatus.

Abstract: Wireless devices are adapted to facilitate beamforming communications in wireless networks. A wireless device may identify a first beam group with a number of beams equal to a maximum number of allowed beams, and a second beam group with a number of beams less than the maximum number of allowed beams. Channel statistics may be estimated for each of the first beam group and the second beam group, and the second beam group may be selected for communications when the second beam group is determined to have at least substantially equal or greater channel statistics compared to the first beam group. Other aspects, embodiments, and features are also included.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station operating in unlicensed spectrum may temporarily increase a paging opportunity window (POW) size, or reduce a time between POWs, in order to meet performance metrics or account for time periods when a base station is unable to win access to the wireless medium during a POW. In some cases, a UE may identify a failed listen-before-talk procedure and autonomously update the POW size. In other examples, a base station may initiate a change in POW size or increase a number of paging opportunities in order to meet achieve one or more key performance indicators (KPIs). After a predetermined period, or after a triggering condition is no longer present, the UE and the base station may reset the POW size or the number of paging opportunities to a nominal amount to conserve power.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may utilize synchronization signal block (SSB) and channel state information reference signal (CSI-RS) based beam management to select beams for communicating with a base station. For example, a UE may receive, from a base station, control signaling that configures the UE to monitor a set of SSBs and a set of reference signals. The UE may select a subset of the set of SSBs based on measuring a first signal metric for each SSB of the set of SSBs. In some examples, the UE may select a reference signal subset of the set of reference signals that correspond to the subset of the set SSBs, and may communicate a data transmission with the base station using a first beam selected based on measuring a second signal metric for each reference signal in the reference signal subset.

Abstract: Apparatus, methods, and computer-readable media for facilitating multi-tasking and smart location selection during connected-mode discontinuous reception (CDRX) mode are disclosed herein. Example techniques disclosed herein enable a UE to perform multiple tasks during a same SSBS to reduce the number of wake-up SSBSs. For example, disclosed techniques enable a UE to perform RLM tasks and loop tracking tasks during a first SSBS and thereby reduce the number of wake-up SSBSs. In some examples, the UE may also perform the search task or the measurement task during the same first SSBS and, thereby, further reduce the number of wake-up SSBSs. Example techniques disclosed herein may also enable the UE to select which SSBS occurrences to wake-up for during the OFF duration of the CDRX cycle.

Abstract: Disclosed are techniques for enabling a user equipment (UE) operating in carrier aggregation mode to use different connected mode discontinuous reception (CDRX) configurations for different sets of component carriers associated with different sets of numerologies. For example, in Frequency 1 (FR1) plus Frequency 2 (FR2) carrier aggregation (i.e., one or more FR1 component carriers and one or more FR2 component carriers), a different CDRX can be configured for FR1 than for FR2. In inter-band carrier aggregation (i.e., one or more component carriers in one frequency band and one or more component carriers in another frequency band), CDRX can be configured per band. For mixed numerologies carrier aggregation (i.e., one or more component carriers with a first numerology and one or more component carriers with a different numerology), CDRX can be configured per cell group, where each cell group contains a single numerology or mixed numerologies.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, for a first radio access technology, signaling identifying a set of physical resource blocks for a tracking reference signal transmission configured in a bandwidth part of a system bandwidth. The UE may determine that a collision condition is satisfied for a first one or more physical resource blocks of the set of physical resource blocks. The UE may receive the tracking reference signal transmission in a second one or more physical resource blocks of the set of physical resource blocks based at least in part on determining that the collision condition is satisfied for the first one or more physical resource blocks. Numerous other aspects are provided.

Abstract: The apparatus may be a base station. The apparatus processes a plurality of synchronization signals by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the plurality of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals. The apparatus transmits the processed synchronization signals to a user equipment (UE).

Abstract: Methods, systems, and devices for wireless communications are described. A base station may implement cross-carrier scheduling. A user equipment (UE) may identify a minimum scheduling delay and may receive a downlink grant on a first CC. The UE may further identify the slot in which a downlink data transmission corresponding to the downlink grant will be received, and may identify the slot such that the minimum scheduling delay is satisfied. The UE may the receive the downlink data transmission, as indicated in the downlink grant, in the identified slot. In some examples, the UE and the base station may alternate between a long minimum scheduling delay and a short minimum scheduling delay. In some examples, the UE and the base station may alternate between a cross-carrier mode, and a self-scheduling mode.

Abstract: A user equipment (UE) receives a plurality of synchronization signals, the plurality of synchronization signals including a plurality of first synchronization signals of different types and a plurality of second synchronization signals of different types. Reception of the plurality of synchronization signals comprises: reception of a first transmission by receiving a first group of the plurality of synchronization signals; and reception of one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission, wherein the first transmission and the one or more repeat transmissions of the first transmission are received within a first synchronization subframe. The UE demultiplexes the plurality of synchronization signals by performing time-division demultiplexing of at least one of the plurality of first synchronization signals and at least one of the plurality of second synchronization signals.

Abstract: Aspects are provided allowing a UE configured for Type II channel state feedback (CSF) to determine based on one or more antenna configurations or channel conditions whether to use the Type II codebook or to revert to a Type I codebook when computing CSF. Based on this determination, the UE may compute CSF based on the Type I codebook in situations where the performance gain of Type II codebooks may be reduced, thereby saving computational power, transmission power, and/or overhead when computing and reporting CSI feedback. The UE may subsequently transmit the CSF computed based on the Type I codebook in the allocated resources for Type II CSI feedback without the need for a separate signaling format, thereby simplifying and enabling reuse of the CSI feedback procedure.

Abstract: Apparatus, methods, and computer-readable media for facilitating dual stage CSI selection for CSI feedback are disclosed herein. An example method of wireless communication at a UE includes, after detecting a CSI report triggering event, selecting a subset of CSI-RS resources from a set of CSI-RS resources configured for the UE by applying at least one of an RSRP threshold or an SINR threshold to each CSI-RS resource of the set of CSI-RS resources. The example method also includes selecting a CSI-RS resource from the subset of CSI-RS resources based on an efficiency metric associated with each of the CSI-RS resources of the subset of CSI-RS resources. The example method also includes transmitting a CSI report to a base station, the CSI report including a CQI associated with the selected CSI-RS and at least one of a PMI, an RI, or a wideband component of the PMI.

Abstract: The present disclosure relates to transmitting and receiving a beam report at a UE and a base station. The base station can configure a cDRX cycle with the UE. Also, the UE can wake up during an off period of the cDRX cycle. The UE can also compare a first metric of at least one of a plurality of candidate beams and a second metric of a current beam for communication with the base station. Additionally, the UE can transmit a beam report to the base station, during the off period, based on the comparison of the first metric of the at least one of the plurality of candidate beams and the second metric of the current beam. The UE can also select, during the off period of the cDRX cycle, the at least one of the plurality of candidate beams for communication with the base station.

Abstract: Apparatus, methods, and computer-readable media for facilitating adaptive precoder updating for channel state feedback are disclosed herein. An example method of wireless communication at a UE includes selecting a second wideband component W1 of a second PMI, the second PMI including the second wideband component W1 and a second subband component W2, and the selecting of the second wideband component W1 being based at least on a determining of whether to reuse for the second wideband component W1 a first wideband component W1 of a first PMI previously determined based on received first CSI-RS, the first PMI including a first wideband component W1 and a first subband component W2. The example method also includes determining the second PMI based on a received second CSI-RS, the second wideband component W1, and the second subband component W2. The example method also includes reporting the determined second PMI to a base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication that the UE is to communicate using a frequency division duplexing (FDD) configuration on an unpaired frequency band that includes at least one uplink frequency region and at least one downlink frequency region in accordance with the FDD configuration. The UE may communicate the FDD configuration. Numerous other aspects are provided.

Abstract: Certain aspects of the present disclosure provide techniques for carrier independent signal transmission and reception. Certain aspects provide a method for wireless communication. The method includes applying, at a device, a phase correction to a first signal to compensate for a difference between a first zero tone location comprising a first frequency and a second zero tone location comprising a second frequency. The method further includes one of: transmitting the first signal after applying the phase correction; or receiving the first signal prior to applying the phase correction.

Abstract: Long term evolution (LTE) common reference signal (CRS)-assisted new radio (NR) tracking operations are disclosed. A user equipment (UE) may obtain a colocation indication identifying a quasi-colocation (QCL) status of a legacy network downlink antenna associated with one or more cell-specific reference signal (CRS) resource elements (REs) and an advanced network downlink antenna in communication with the UE. The UE may then perform a tracking loop operation for the advanced network using the one or more CRS REs of the legacy network in response to the QCL status indicating a QCL state, wherein the QCL state indicates the legacy network downlink antenna is quasi-colocated with the advanced network downlink antenna.

Abstract: Methods, systems, and devices for wireless communications are described to enable a user equipment (UE) to employ a discretionary on mode (e.g., powering receiver circuitry) in order to conserve power during discontinuous reception. The UE may discretionarily cut down an on time duration by delaying wake-up (e.g., powering on receiver circuitry) or by sleeping (e.g., powering down receiver circuitry) during portions of an on duration. The UE may also discretionarily skip one or more on durations. The UE may use hybrid automatic repeat request retransmissions to receive information that may be missed when sleeping during a configured on duration. The UE may evaluate one or more conditions in order to determine whether to employ a discretionary on mode. For example, the UE may determine to conserve power based on one or more of a data traffic type, a battery level, a channel condition, a retransmission policy, or physical layer activities.