Abstract: In some implementations, a user equipment (UE), transmits a first uplink message indicating an acknowledgement (ACK) or a negative acknowledgement (NACK) associated with receiving a transmission. The UE receives downlink message including a control message indicating a configuration for the UE to provide a hybrid automatic repeat request (HARQ) state based on an ambiguity associated with the first uplink message indicating the ACK or the NACK, where the UE receives the downlink message without a physical downlink shared channel (PDSCH) allocation. The HARQ status indicates a decoding state, a new data indicator, or both.

Abstract: Certain aspects of the present disclosure provide techniques for transport block (TB) re-transmission. A method generally includes receiving a first downlink control message that schedules a re-transmission of a first TB, the first downlink control message comprising: a first special modulation and coding scheme (MCS) index that indicates a first modulation order for the re-transmission of the first TB; and information about a first TB size (TBS) for the re-transmission of the first TB; and based on the first downlink control message, performing one or more actions, wherein the one or more actions comprise: detecting the re-transmission of the first TB and decoding the first TB based on the first special MCS index and the information about the first TBS; or sending the re-transmission of the first TB according to the first special MCS index and the information about the first TBS.

Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may receive configuration information that indicates one or more paging occasions and an idle discontinuous reception (I-DRX) mode. The UE may monitor the one or more paging occasions based at least in part on a transition from a sleep state to a monitoring state in accordance with the I-DRX mode. The UE may receive a paging message associated with the one or more paging occasions based at least in part on the one or more paging occasions being monitored. The paging message is addressed to a different UE, and the paging message may include a demodulation reference signal (DMRS), data, or both. A tracking loop may be adjusted based on the DMRS, the data, or both.

Abstract: In some examples of the techniques described herein, a network entity may transmit a last transmission indication for a channel grant. The last transmission indication may indicate a last transmission (e.g., last packet of a retransmission) of a current data transmission to be communicated. In some approaches, the last transmission indication may allow a user equipment (UE) to improve a residual physical downlink shared channel (PDSCH) block error ratio (BLER) by prioritizing handling of a last transmission. Additionally, or alternatively, the UE may increase memory (e.g., buffer) utilization efficiency by deleting data stored for retransmission. In some examples, the UE may reduce power consumption by skipping a retransmission timer in connected mode discontinuous reception (C-DRX) without a forthcoming retransmission. In some scenarios, the UE may utilize the last transmission indication to determine whether received data corresponds to a retransmission or to a new transmission.

Abstract: Methods, systems, and devices for wireless communications are described to reduce a quantity of blind decodes performed at a user equipment (UE) when monitoring for downlink control information from a network entity. The quantity of blind decodes at a UE may be reduced through selection of a subset of a set of candidates based on a channel condition associated with two or more candidates of the set of candidates. Channel reciprocity for uplink and downlink channels may provide that the network entity may evaluate the downlink channel response experienced by the UE by measuring the reciprocal uplink channel such that the network entity selects a same candidate, or one of two or more candidates in a subset of candidates. The UE may use downlink channel measurements to select a blind decoding candidate, or subset of candidates, that corresponds to the candidate selected by the network entity.

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless networks may maintain up-to-date location information for the UE by periodically determining the location the UE using a low power transponding mechanism while the UE is in an inactive state. The UE may monitor a first beam to receive one or more transponder search signals during one or more transponder occasions, and between paging attempts from one or more of the base stations of the network. The UE may receive the one or more transponder search signals, and may transmit a transponder response message to a base station including a UE identifier associated with the inactive state. The base station may receive the transponder response message, and may conduct various location measurements for the UE using the transponder response.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting user equipment (UE) may obtain a sidelink control message for transmission that at least partially overlaps in time with a time domain location of a first set of one or more time domain locations for communicating a data message reference signal according to a first configuration. The UE may transmit, in accordance with a second configuration, the sidelink control message during the time domain location and a set of data message reference signals during a second set of one or more other time domain locations in accordance with obtaining the sidelink control message. Numerous other aspects are described.

Abstract: A communications device inputs channel state information to an artificial neural network. The communications device predicts weather conditions with the artificial neural network based on the channel state information. The communications device further adjusts communications based on the predicted weather conditions.

Abstract: Aspects of the disclosure relate to devices, wireless communication apparatuses, methods, and other aspects of correcting misalignment for orbital angular momentum beams. In one aspect, a wireless communication apparatus comprises a beamforming network comprising a plurality of antenna ports and a plurality of beam ports, wherein the plurality of antenna ports are positioned for communicating orbital angular momentum (OAM) beams, a plurality of output phase shifters, wherein each output phase shifter is coupled to a corresponding antenna port of the plurality of antenna ports, and control circuitry coupled to the plurality of output phase shifters and configured to select phase shift values for the plurality of output phase shifters to correct a misalignment of the OAM beams.

Abstract: Methods, systems, and devices for wireless communications are described. A first UE may monitor for a system information block (SIB) message from a network entity via an access link. The first UE may transmit, via a sidelink communications link between the first UE and a second UE and based on failure to receive the SIB message via the access link, a SIB sidelink request message. The SIB sidelink request message may include a request to assist the first UE in obtaining the SIB message. The second UE may receive, via an access link and from the network entity identified by the SIB sidelink request message, the SIB message. The second UE may transmit, via the sidelink communications link, an assistance message that includes a SIB payload of the SIB message or joint decoding information associated with the SIB payload in accordance with the SIB sidelink request message.

Abstract: An electronic device having a radio is provided. When the radio boots up, the radio may search for downlink signals transmitted by a wireless base station. The device may generate a narrow set of candidate frequencies over which to search for the downlink signals by leveraging a cyclic prefix autocorrelation property of the downlink signals. Each candidate frequency may have a corresponding center frequency offset (CFO) and symbol boundary timing correction that is used when searching over the narrow set of candidate frequencies. To generate the narrow set of candidate frequencies, control circuitry may generate autocorrelated signals from baseband-shifted input signals over a set of different center frequencies and bandwidths. Searching over the narrow set of candidate frequencies may be significantly faster than performing a full raster scan over all frequencies supported by the radio.

Abstract: Certain aspects of the present disclosure provide techniques for machine learning (ML) based control channel (CCH) resource selection. An example method, performed at a user equipment (UE), generally includes receiving, from a network entity, signaling indicating parameters for configuring a machine learning (ML) model, applying the parameters to configure the ML model, performing channel estimation based on at least one reference signal (RS) measurement, using the ML model to select control channel (CCH) resources to monitor, based on the channel estimation, and monitoring the selected CCH resources for a CCH transmission from the network entity.

Abstract: Certain aspects of the present disclosure provide techniques for allocating downlink channel resource(s) for a device supporting known downlink control information (DCI) values. A method generally includes receiving an indication of one or more DCI fields that indicates to assume a respective value for each of the one or more DCI fields to attempt to decode a downlink control channel candidate; and attempting to decode the downlink control channel candidate to obtain DCI based on the respective value for each of the one or more DCI fields.

Abstract: Methods, systems, and devices for wireless communications at a user equipment (UE) are described. The UE may receive control signaling indicating a plurality of synchronization signal block (SSB) occasions for a plurality of SSB beams and indicating a plurality of random access occasions. The UE may monitor a first SSB beam of the plurality of SSB beams may monitor a plurality of reference signal beams associated with the first SSB beam, where each beam of the plurality of reference signal beams has a narrower beamwidth than the first SSB beam, and where each beam of the plurality of reference signal beams is quasi co-located and frequency domain multiplexed with the first SSB beam. The UE may transmit a random access message during a first random access occasion, the first random access occasion indicating a first reference signal beam selected from the plurality of reference signal beams.

Abstract: Aspects described herein relate to receiving a control information having a field indicating that the control information is for one of multiple events associated with control or triggering without data allocation, obtaining, from the control information and based on the field, an event identifier from an event identifier field indicating a type of control or triggering event associated with the control information, and performing, based on the event identifier, the control or triggering associated with the control information. Other aspects relate to generating and transmitting the control information.

Abstract: Aspects relate to mechanisms for mutual information (MI)-based physical downlink control channel (PDCCH) candidate pruning. A UE may receive a plurality of PDCCH candidates in a search space. Each of the PDCCH candidates includes a demodulation reference signal (DMRS) generated with the same scrambling seed and control information generated with one or more respective UE-specific non-transparent precoding parameters. The UE can prune the PDCCH candidates to identify at least one PDCCH candidate for decoding by generating the log-likelihood ratio (LLR) magnitudes of demodulated PDCCH candidates and calculating the mutual information based on the LLR magnitudes.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. Some aspects relate to channel-condition-based (or channel aware) dedicated grant-free transmission configurations. Some aspects more specifically relate to a configured grant (CG) configuration that is associated with one or more parameters that are selectable (for example, by a user equipment (UE)) in accordance with current channel conditions experienced by the UE. In some aspects, the CG configuration may be associated with one or more rules that can be used to define or otherwise indicate values of one or more parameters for the CG configuration. The UE may transmit one or more communications, via a transmission occasion configured via the CG configuration, in accordance with the one or more values of respective parameters for the CG configuration.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a signal synchronization block (SSB) associated with a network cell, where the SSB includes at least one bit indicating that the network cell provides a fallback system information block (SIB). The UE may receive the fallback SIB, where the fallback SIB is received without using downlink control information. 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 determine a set of recommended base station transmit beams for full duplex operation based at least in part on measurements of a set of base station transmit beams and measurements of self-interference associated with the set of base station transmit beams. The UE may transmit a report that indicates a recommendation to use one or more of the set of recommended base station transmit beams for full duplex operation. 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 generate a sequence-based transmission comprising at least a first payload, the first payload having a size that is based at least in part on whether the sequence-based transmission comprises the first payload without a second payload or comprises the first payload and the second payload. The UE may transmit the sequence-based transmission to a network node. Numerous other aspects are described.