Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for wireless communication via a non-terrestrial network (NTN). In one aspect, a method for wireless communication includes initiating, by a user equipment (UE), a registration process with a network entity of an NTN to access the NTN. The method also includes transmitting, by the UE to the network entity, UE capability information of the UE. The method further includes receiving, by the UE from the network entity, a handover command, the handover command comprising a handover time indicator associated with a target handover time for the UE to perform a handover operation from a first beam to a second beam. Other aspects and features are also claimed and described.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a UE-requested BFD/BFR reference signal. In aspects, the UE may transmit, to a base station, a request for a list of a set of beams for BFD and a list of a set of candidate beams for BFR. The UE may receive, from the base station based on the transmitted request, information indicating the set of beams for BFD and the set of candidate beams for BFR.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for mitigating timing resolution limitations due to synchronization signal blocks (SSBs) with low subcarrier spacing (SCS). An example method by a user equipment (UE) generally includes detecting a SSB; determining a start time of a control resource set (CORESET) associated with the detected SSB, wherein the start time of the CORESET is aligned with a boundary of a symbol having a larger cyclic prefix (CP) than one or more other symbols in a same half-subframe; and monitoring the CORESET for a physical downlink control channel (PDCCH) transmission.

Abstract: Methods, systems, and devices for wireless communications are described. A network may manage and configure narrow bandwidth parts (NBWPs) for reduced capability user equipment (UEs) based on data priorities, load conditions, etc. For example, in some cases, a NBWP may be associated with some active time interval (e.g., or a UE may be able to utilize a NBWP for some active time interval). A base station may configure periodic NBWPs (e.g., where NBWPs may be active in time according to some periodicity and start time), semi-persistent NBWPs (e.g., where explicit NBWP activation indications and NBWP deactivation indications may be sent by the base station), aperiodic NBWPs (e.g., where the base station may activate a NBWP for some signaled active time interval), or some combination thereof. Additionally or alternatively, a network may support on-demand NBWP activation, timer (e.g., inactivity timer) based deactivation of NBWPs, etc.

Abstract: A base station may transmit a beam refinement reference signal prior to a paging physical downlink control channel (PDCCH) monitoring occasion to improve reception of a paging downlink control information (DCI). A user equipment (UE) may receive at least one transmission indicating the beam refinement reference signal transmitted prior to the PDCCH monitoring occasion. The UE may receive the beam refinement reference signal prior to the paging PDCCH monitoring occasion based on the at least one transmission. The UE may receive a downlink control information on the paging PDCCH monitoring occasion based on the beam refinement reference signal.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether a flag is enabled or is disabled, the flag indicating whether channel state information (CSI) associated with a secondary discontinuous reception (DRX) group is permitted to be transmitted outside of an active time associated with a primary DRX group. The UE may selectively transmit the CSI associated with the secondary DRX group in an uplink communication associated with the primary DRX group based at least in part on whether the flag is enabled or is disabled. Numerous other aspects are provided.

Abstract: Certain aspects of the present disclosure provide techniques for communicating via one or more subcarrier spacings in accordance with an indication of a subcarrier spacing capability. A method that may be performed by a user equipment (UE) includes transmitting, to a network entity, an indication of a subcarrier spacing capability of the UE associated with a frequency range and communicating with the network entity in accordance with the indication.

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, information associated with identifying a communication diversity configuration. The UE may receive, from the base station, a transport block on a downlink in accordance with the communication diversity configuration. 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 transmit a first random access channel (RACH) message to a base station, and monitor for a second RACH message from the base station in a set of resource candidates that are based at least in part on the transmitted first RACH message absent downlink control information. The set of resource candidates may be outside of a physical downlink control channel. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may determine a phase noise profile and may transmit the phase noise profile to a receiving device. The receiving device may use the phase noise profile and received phase tracking reference signals to more accurately determine phase errors on a wireless channel between the two devices and compensate for the phase noise errors. In examples where the UE transmits the phase noise profile to the base station, the UE may include the phase noise profile in a measurement report or in a radio resource control (RRC) message, among other examples. In examples where the base station transmits the phase noise profile to a UE, the base station may include the phase noise profile in a broadcast message, a unicast message, or an RRC message.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communications by a transmitter, comprising generating a waveform to be transmitted in one or more symbols, with a guard interval (GI) between adjacent symbols according to a GI configuration selected from a plurality of GI configurations, and transmitting the waveform with the GI between symbols.

Abstract: A wireless device (e.g., a UE or a base station) may generate a hybrid symbol including a CP portion, a data portion, and at least one of a header portion or a tail portion. The CP portion may be located at a beginning of the hybrid symbol, and may include one or more CP samples that correspond to a predefined number of samples at an end of the hybrid symbol. The data portion may be located after the header portion or before the tail portion. The header portion may be located after the CP portion, and may include one or more predefined header samples. The tail portion may be located at the end of the hybrid symbol, and may include one or more predefined tail samples. The wireless device may generate a waveform including the generated hybrid symbol. The wireless device may transmit a signal based on the generated waveform.

Abstract: Techniques for alternative semi-persistent scheduling (SPS) parameter implementation in association with preemption of use of resources corresponding to other SPS parameters are described. Wireless devices may be implicitly informed with respect to implementing alternative resources corresponding to one or more alternative SPS parameters when use of resources corresponding to first SPS parameters is preempted. A disruption indication (DI), such as used to indicate preemption of downlink transmission on downlink SPS allocated resources and/or a cancellation indication of uplink transmission on uplink SPS allocated resources, may be used to inform (e.g., implicitly) one or more wireless devices to employ alternative resources corresponding to alternative SPS parameters available to the wireless devices. Other aspects and features are also claimed and described.

Abstract: Methods, systems, and devices for wireless communications are described in which control information is transmitted using a single carrier (SC) waveform in time domain blocks without a cyclic prefix (CP). A base station may configure a user equipment (UE) for control information transmissions using a SC waveform without CPs in time domain blocks, and may activate the SC waveform without CPs in time domain blocks based on one or more parameters. The control information may be non-uniformly segmented across two or more time domain blocks or two or more portions of a time domain block. A reference signal, such as a demodulation reference signal, may be transmitted in the time domain blocks, where the reference signals may be distributed evenly or unevenly across the time domain blocks.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine at least one of a variable random access response (RAR) window start time, a variable maximum quantity of slots for an index of a first slot of a physical random access channel occasion, or scheduling information related to one or more variable delays for an uplink transmission. The BS may transmit, to a user equipment, at least one of information that identifies the RAR window start time, information that identifies the variable maximum quantity of slots, or the scheduling information. 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, from a base station, an indication of a time domain resource allocation (TDRA), in a unit of a time domain resource block (RB) or in a unit of a time domain RB group, for a communication that is to use a time domain waveform. The unit of the time domain RB or the unit of the time domain RB group may be a sub-symbol unit. The UE may communicate with the base station, using the time domain waveform, based at least in part on the TDRA for the communication. Numerous other aspects are described.

Abstract: A wireless device (e.g., a UE or a base station) may identify a first subcarrier mapping associated with one or more redundant subcarriers. The one or more redundant subcarriers may correspond to one or more UWs in a UW-OFDM waveform. The wireless device may identify a second subcarrier mapping associated with one or more reference signals. A simultaneous application of the first subcarrier mapping and the second subcarrier mapping may be associated with one or more collisions. The wireless device may modify at least one of the first subcarrier mapping or the second subcarrier mapping to eliminate the one or more collisions. The wireless device may generate the UW-OFDM waveform based on the modified at least one of the first subcarrier mapping or the second subcarrier mapping. The wireless device may transmit a signal based on the generated UW-OFDM waveform.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may identify an energy per resource element (EPRE) ratio between a synchronization signal block (SSB) symbol containing a primary synchronization signal (PSS) and an SSB symbol containing a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), or both, based on an operating band for the UE, a bandwidth of the SSB symbol containing the PSS and the SSB symbol containing the SSB, the PBCH, or both. The EPRE ratio may be based on maximum regulatory equivalent isotropically radiated power (EIRP) limits, maximum regulatory power spectral density (PSD) limits for the band, or both. The EPRE ratios may be different for different SSB symbols, when different SSB symbols have different bandwidths. A base station may configure and transmit, and a UE may receive, the SSB according to the identified EPRE ratio.

Abstract: Aspects described herein relate to switching waveforms in a waveform switching gap. In an aspect, using a transceiver, a first signal of a first waveform can be communicated in a first time period. In a waveform switching gap, the transceiver can be switched to use a second waveform. Using the transceiver, a second signal of a second waveform can be communicated in a second time period. The waveform switching gap may occur between the first time period and the second time period.

Abstract: Techniques and apparatus for using downlink control information (DCI) to avoid hybrid automatic repeat request (HARQ) process identifier (ID) conflicts in scenarios where multiple semi persistently scheduled (SPS) configurations share the same pool of HARQ process IDs are provided. One example technique involves a user equipment (UE) receiving an indication of a plurality of SPS configurations, each SPS configuration allocating the UE with a set of SPS occasions for physical downlink shared channel (PDSCH) transmissions. Information for resolving a conflict between a first HARQ process ID associated with a first SPS occasion of a first of the plurality of SPS configurations and a second HARQ process ID associated with a second SPS occasion of a second of the plurality of SPS configurations is received. The first SPS occasion occurs prior to the second SPS occasion. The conflict is resolved based on the information.