Abstract: Aspects relate to techniques for enhancing sidelink scheduling information to include a priority assigned to a sidelink transmission. For example, a transmitting wireless communication device may receive sidelink scheduling information scheduling a sidelink transmission from a transmitting wireless communication device to a receiving wireless communication device. The sidelink scheduling information may further include a priority indicator associated with the sidelink transmission. The transmitting wireless communication device may then transmit the sidelink transmission to the receiving wireless communication device based on the scheduling information. The priority indicator may further facilitate hybrid automatic repeat request (HARQ) codebook construction on the sidelink and uplink for the transmission of acknowledgement information of the sidelink transmission.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink signal from a network entity, the downlink signal associated with a set of available random access channel occasions, each random access channel occasion in the set of available random access channel occasions defining a resource set available for a random access procedure with the network entity. The UE may perform the random access procedure with the network entity using at least one random access channel occasion of the set of available random access channel occasions, the at least one random access channel occasion selected based at least in part on the downlink signal.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a network device can transmit, to a group of passive devices, a continuous wave (CW) signal. The network device can receive, from each passive device of the group of passive devices, at least one backscatter signal, based on the CW signal, at a respective frequency shift. The network device can estimate, based on the at least one backscatter signal, channel information for each passive device of the group of passive devices. The network device can then determine, based on the channel information, a channel for transmitting an energy signal to at least one passive device of the group of passive devices for energy harvesting.

Abstract: Flexible under-bump metallization sizes and patterning, and related integrated circuit packages and fabrication methods are disclosed. First under-bump metallizations (UBMs) of a first, larger size and pitch are provided in the die and coupled to corresponding metal interconnects in the package substrate. One or more second UBMs of a second, reduced size UBMs can also be located in the core area of the die. This provides greater flexibility in the design and layout of the die, because different circuits within the die (e.g., I/O related circuits) may only require coupling to smaller size UBMs for performance requirements and thus can be more flexibility located in the die. Also, to further reduce pitch of the second, smaller size UBMs, one or more of the second, smaller size UBMs can be formed as oblong-shaped UBMs, which can still maintain a minimum separation based on metal interconnect pitch limitations in the package substrate.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless communication device may receive, via a first radio frequency spectrum band, a control message that includes an uplink grant for sending one or more backscattered uplink messages via a second radio frequency spectrum band that is higher than in frequency than the first radio frequency spectrum band and separated from the first radio frequency spectrum band by at least a threshold frequency gap. The wireless communication device may then receive a continuous waveform via the second radio frequency spectrum band, and modulate the continuous waveform with uplink data of the one or more backscattered uplink messages. The wireless device may then send, via the second radio frequency spectrum band, a backscattered signal of the continuous waveform based on modulating the continuous waveform with the uplink data.

Abstract: Methods, systems, and devices for wireless communications are described. A distributed unit (DU) may output to a radio unit (RU), a data waveform and an initial resource allocation for the data waveform. The RU may generate and transmit to the DU a peak-to-average power ratio (PAPR) for the data waveform and a peak power value for a transmission time interval (TTI). Based on the PAPR and the peak power value, the DU generate and forward to the RU a multiplexed signal. The multiplexed signal may include the data waveform associated with a first resource allocation and comprising a multi-tone energy waveform associated with a second resource allocation. In some examples, the multi-tone energy waveform may be used for power harvesting operations at one or more ambient wireless devices. The RU may transmit the multiplexed signal to one or more wireless devices.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from each of multiple devices that communicate with the UE via one or more sidelink channels, information indicating a buffer status of the device. The UE may transmit, to a base station, a buffer status report that indicates a combined sidelink buffer status for the multiple devices. Numerous other aspects are described.

Abstract: Apparatus, methods, and computer-readable media for facilitating phase jump estimation for SL DMRS bundling are disclosed herein. An example method includes receiving, from another device, first information at a first symbol of a first slot, the first slot including at least the first symbol and a first reference signal. The example method also includes receiving second information at a second symbol of a second slot, the second slot including at least the second symbol and a second reference signal, the first information and the second information being repetitions. The example method also includes generating a first reference signal copy based at least on the second reference signal and a phase jump between the first slot and the second slot. Additionally, the example method includes performing channel estimation across the first slot and the second slot based on an aggregation of the first reference signal and the first reference signal copy.

Abstract: Systems, methods, and devices for wireless communication that support resource selection and indication for sidelink demodulation reference signal (DMRS) bundling. A transmitting UE determines sidelink resources for bundling a sidelink DMRS transmission to be transmitted to a receiving UE. In sidelink mode 1, the sidelink resources may be determined based on indications from a base station, which may include whether the transmitting UE is to maintain phase continuity over the sidelink resources during the bundling, or whether the transmitting UE is to include a phase jump reference signal with the bundled DMRS transmission to the receiving UE. In sidelink mode 2, the transmitting UE may select the sidelink resources based on the phase continuity capabilities of the transmitting UE and/or of the receiving UE, and/or based on a sensing of the sidelink channel. In some cases, the receiving UE may provide a resource recommendation to the transmitting UE.

Abstract: Techniques for wireless communications are described. A user equipment (UE) may receive downlink control information (DCI) scheduling sidelink transmissions in one or more sets of multiple transmission time intervals (TTIs) over a shared spectrum. The UE may perform a listen-before-talk (LBT) for one or more of the TTIs in the one or more sets of multiple TTIs, and the UE may transmit, to a base station, an indication of results of the LBT performed for the one or more TTIs. Because the UE may provide the results of the LBT to the base station, the base station may be able to schedule sidelink transmissions from the UE based on the results of the LBT. As such, the UE may experience increased throughput in sidelink communications since the scheduling at the base station may be improved.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a wireless node establishes sidelink connections with a set of UEs. The wireless node transmits, to a network component, a request for sidelink resources for a sidelink position estimation procedure associated with the set of UEs. The network component determines an available sidelink resource pool for the sidelink position estimation procedure in response to the request. The network component transmits, to the wireless node in response to the request, an indication of the available sidelink resource pool for the sidelink position estimation procedure. The wireless node transmits, to each UE in the set of UEs, a sidelink resource configuration that is based on the available sidelink resource pool for the sidelink position estimation procedure.

Abstract: Methods, systems, and devices for a wireless communication are described. A base station may control multiple parameters for sidelink communication configurations to be used by a user equipment (UE) for sidelink communications. The base station may determine the multiple parameters for sidelink communication configurations and configure multiple UEs for sidelink communication based on the determination. The multiple parameters may include a modulation and coding scheme, a redundancy version, a demodulation reference signal pattern or port, a transmit power control, a sidelink hybrid automatic repeat request (HARQ) indicator, a cast type, a HARQ process number, a receiver UE identifier, or any combination thereof. The indication may be included in downlink control information.

Abstract: Methods, systems, and devices for wireless communications are described. Autonomous transmissions between a user equipment (UE) and a base station may be configured that include at least one of a modulation and coding scheme (MCS) or resources for the transmissions. In some cases, a trigger may be detected that changes the MCS or resources to be used for the autonomous transmissions. The trigger may include the presence or absence of retransmissions or the value of a channel measurement falling below or exceeding a threshold value. Accordingly, the base station and UE may adjust the MCS or resources to be used for the autonomous transmissions based on detecting the trigger and then communicate using the adjusted MCS or resources. In some cases, the configuration for the autonomous transmissions may be signaled via a medium access control (MAC) control element (CE).

Abstract: Systems and techniques are provided for accelerated shadow ray traversal for a hierarchical structure for ray tracing. For instance, a process can include obtaining a hierarchical acceleration data structure, the hierarchical acceleration data structure including one or more primitives of a scene object. Two or more nodes included in a same level of the hierarchical acceleration data structure can be sorted into a sort order, the sort order based on a sorting parameter value determined for each respective node of the two or more nodes. The sorting parameter value can be associated with a probability of determining a ray-opaque primitive intersection for each respective node of the two or more nodes. An intersection between a shadow ray and an opaque primitive included in a node of the two or more nodes can be determined based on traversing the hierarchical acceleration data structure using the sort order.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may receive, from a second network entity, an indication of a first frequency offset associated with the second network entity. In some aspects, the first network entity may receive, from the second network entity, a first transmission including a first communication and a first helper signal that are separated in a frequency domain based on the first frequency offset. In some aspects, the first network entity may decode, via envelope tracking, the first transmission to obtain the first communication from the first transmission. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a network device to transfer energy to an energy harvesting (EH)-capable device via a multisine waveform. The network device may transmit the multisine waveform according to a multisine waveform configuration that indicates frequency locations for each EH channel of the multisine waveform across a channel bandwidth. In some cases, the network device may determine the multisine waveform configuration according to latency information of the passive IoT device, channel quality measurements for the channel bandwidth, or both. The multisine waveform configuration may indicate a distribution of individual EH channels across the channel bandwidth to improve frequency diversity, may indicate a contiguous grouping of EH channels to improve multisine gain, or a combination thereof.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reader device may select one or more dedicated slots for communications with ambient devices. The reader device may transmit a helper tone signal and a data tone signal in slots that are among the one or more dedicated slots. Numerous other aspects are described.

Abstract: In an aspect, a user equipment (UE) may receive positioning assistance data from a location server, wherein the positioning assistance data identifies one or more first positioning reference signal (PRS) resources for measurement by the UE during a positioning session between the UE and a location server. The UE may receive post-measurement positioning assistance data from at least one sidelink device located within a threshold distance to the UE, wherein the post-measurement positioning assistance data received from the at least one sidelink device is based on measurements of one or more second PRS resources obtained by the at least one sidelink device during a positioning session of the at least one sidelink device. The UE may selectively measure at least a subset of the one or more first PRS resources based on the post-measurement positioning assistance data received from the at least one sidelink device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reader device may transmit a delta message that indicates a frequency difference between a data tone frequency for the reader device and a helper tone frequency. The reader device may transmit a data tone signal at the data tone frequency and a helper tone signal at the helper tone frequency. The helper tone signal may be a waveform that is shared among multiple reader devices. Numerous other aspects are described.

Abstract: Aspects of the present disclosure provide techniques for configuring a search space for reverse sidelink communications between one or more sensors/actuators (SAs) and programmable logic controller (PLC) in internet of things (IoT) applications. Particularly, the techniques described herein configure a search space (e.g., subset of all available sub-channels) for reception of sidelink packets (e.g., physical sidelink control channel (PSCCH) and physical sidelink shared channel (PSSCH)) that may be received at the PLC from the one or more SAs. In some examples, the PLC may monitor the subset of subchannels and decode the sidelink packets received on the subset of subchannels without the need for the PLC to perform blind decoding of all sidelink sub-channels as is currently required in conventional systems. Thus, the disclosed techniques reduce latency and maximize the resource utilization (e.g., by using less processing power and bandwidth) for sidelink communications.