Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating at least one of a congestion threshold associated with a shared resource pool, or one or more backoff values associated with the shared resource pool. The UE may determine at least one of whether congestion information for the shared resource pool satisfies the congestion threshold, or a backoff value, of the one or more backoff values, associated with the congestion information. The UE may transmit, based at least in part on the determination of the at least one of whether the congestion information satisfies the congestion threshold, or the backoff value associated with the congestion information, a communication. Numerous other aspects are described.

Abstract: In some implementations, a reader receives a first message (e.g., msg1) from an ambient internet of things (A-IoT) device indicating a sequence of bits. The reader generates a second message (e.g., msg2) indicating a tag identifier (ID) including a sequence identifier associated with the sequence of bits and a sampling frequency offset (SFO) identifier associated with the with the first message. The reader transmits the second message to the device, where the tag ID is indicative of a resource allocation for the device to transmit a third message (e.g., msg3) to the reader. The tag ID is 16 bits. The reader and device are communicating in a code division multiplexing (CDM) communication system.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving device may receive, from a first wireless communication device on a first communication channel, a first communication that is configured with at least one guard interval (GI) sequence of a first GI type. The receiving device may receive, from the first wireless communication device or a second wireless communication device on the first communication channel or a second communication channel, a second communication that is configured with at least one GI sequence of a second GI type. 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 receive an indication of a random access response (RAR) window extension. The UE may transmit a first physical random access channel message that is based at least in part on a selected root sequence and a selected cyclic shift (CS) associated with the selected root sequence. The UE may receive, during an RAR window, a first RAR that is associated with the selected root sequence and a first CS that is different from the selected CS. The UE may perform, based at least in part on receiving the first RAR, an adjustment of the RAR window using the RAR window extension, resulting in an adjusted RAR window. The UE may communicate based at least in part on the adjusted RAR window. Numerous other aspects are described.

Abstract: Aspects of the present disclosure provide techniques for intermediate access control for self-scheduled user equipment (UE) transmissions.

Abstract: Certain aspects of the present disclosure provide techniques for backscatter communications. A method, by an apparatus (e.g., such as a reader, or a wireless communications device that is capable of wirelessly communicating with an internet-of-things (IoT) device) generally includes receiving, from a first IoT device, a first random access message; and sending, to the first IoT device, a second random access message that indicates: a first frequency shift for a transmission of a third random access message, wherein the first frequency shift is based on a first signal-to-noise ratio (SNR) associated with the first random access message; and a first bandwidth allocation for the transmission of the third random access message, wherein the first bandwidth allocation is based on the first frequency shift and the first SNR.

Abstract: The apparatus may be a wireless device configured to receive, from a network device, an indication of a plurality of preamble sequence sets for a random access procedure associated with the network device, where each preamble sequence set in the plurality of preamble sequence sets is associated with a different peak to average power ratio (PAPR) and transmit, based on one or more criteria for selecting a preamble sequence set, a random access message comprising a preamble sequence from a selected preamble sequence set of the plurality of preamble sequence sets. The apparatus may be a network device such as a base station configured to transmit, an indication of the plurality of preamble sequence sets and receive a random access message comprising a preamble sequence from a selected preamble sequence set of the plurality of preamble sequence sets.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device, such as a network entity, may transmit an indication (e.g., via control signaling) to a receiving device, such as a user equipment (UE), indicating that a secure downlink message is scheduled for transmission to the UE. The UE may transmit a sounding reference signal (SRS) to the network entity in response to the control signaling, and the network entity may determine a channel estimate and construct interference based on the channel estimate. The network entity may encode the secure downlink message according to an orthogonal time frequency space (OTFS) precoding scheme and may add the interference to the encoded secure downlink message over a slot duration. The network entity may transmit the encoded secure downlink message, including the added interference, to the UE. The UE may decode the encoded secure downlink message based on the OTFS precoding scheme.

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: Certain aspects of the present disclosure provide techniques methods, systems or an apparatus configured to receive an indication of a scheduling request (SR) resource pool; and send an SR using an SR resource of SR resources of the SR resource pool, wherein the SR resource on which the SR is sent indicates information relating to at least one of a requested number of uplink (UL) resources or modulation and coding scheme (MCS) information.

Abstract: Methods, systems, and devices for wireless communications are described. A network entity may allocate two resource pools for user equipments (UEs) to perform self-scheduled uplink transmission to the network entity. For example, the network entity may allocate a first uplink resource pool for uplink control information (UCI) and a second uplink resource pool for the UE self-scheduled data transmissions (e.g., physical uplink shared channel (PUSCH) communications that carry data). A UE may transmit a UCI message via a resource of the first uplink resource pool that reserves or schedules a resource of the second uplink resource pool for a PUSCH communication. Accordingly, the network entity may perform blind-decoding on the resources of the first resource pool but may refrain from performing blind decoding on the resources of the second resource pool.

Abstract: Aspects relate to providing over-provisioned cyclic shift configurations for physical random access channel (PRACH) restricted sets. The over-provisioned cyclic shift configuration for a preamble root sequence can include an allowed cyclic shift range including an allowed set of cyclic shifts associated with a cyclic shift step size less than a maximum round trip time (RTT) of a cell and respective restricted cyclic shift ranges adjacent to the allowed cyclic shift range on either side thereof.

Abstract: Aspects described herein relate to self-scheduled transmissions using a sequence to indicate modulation and coding scheme (MCS) and/or payload size of associated data in the transmission. A resource can be selected from a resource pool configured for transmitting uplink data, and a signal including uplink data, a demodulation reference signal (DMRS) for estimating a channel associated with the uplink data, and a sequence that indicates one or more of the MCS or payload size of the uplink data can be transmitted. Other aspects relate to receiving and processing the self-scheduled transmissions based on the detected sequence.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive, from a first user equipment (UE), a first random access preamble including a first cyclic shift, and from a second UE, a second random access preamble including a second cyclic shift. The network node may transmit, to the first UE, a first random access response message including a first cyclic shift range in accordance with detecting a first communication path associated with the first cyclic shift and a second communication path associated with the second cyclic shift. The network node may receive a random access message from the first UE according to the first cyclic shift range. The network node may transmit, to the second UE, a second random access response message including a second cyclic shift range in accordance with receiving the random access message. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of a delta-frequency associated with a dual-tone downlink transmission from a network entity, the delta-frequency defining a frequency difference between two tones used for the dual-tone downlink transmission. The UE may receive the dual-tone downlink transmission from the network entity according to the two tones. The UE may decode the dual-tone downlink transmission based at least in part on the delta-frequency.

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: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a random access preamble to a network entity via a random access occasion. The UE may then receive a first downlink message that indicates a temporary radio network identifier that is associated with the random access preamble. The UE may further transmit a random access message that includes the temporary radio network identifier indicated via the first downlink message and information associated with a contention resolution identity associated with the UE. Moreover, the UE may receive a second downlink message. In some cases, the second downlink message may include a radio network identifier corresponding to a contention resolution identity that is associated with the UE or a second UE that is different from the UE. Additionally, or alternatively, the second downlink message may include a request for a retransmission of the random access message.

Abstract: A method for wireless communication by a user equipment (UE) includes transmitting, to a network node, a first message indicating a capability of the UE to transmit a multiplexed low peak-to-average power ratio (PAPR) demodulation reference signal (DM-RS) and a high PAPR reference signal (RS) within a single slot, the low PAPR DM-RS having a first waveform and the high PAPR RS having a second waveform. The method also includes multiplexing, associated with the capability, the low PAPR DM-RS with the high PAPR RS within the single slot. The method further includes transmitting, to the network node, the multiplexed low PAPR DM-RS and high PAPR RS within the single slot.

Abstract: The apparatus may be a UE configured to transmit, via a first set of resources associated with a first RO, a first random access message (Msg 1) using a first preamble sequence, transmit, via a second set of resources associated with a second RO, an additional first random access message (additional Msg 1) using a second preamble sequence associated with a first cyclic shift value that indicates support for a capability of the UE, wherein the additional Msg 1 is based on the Msg 1, and receive a second random access message (Msg 2) based on the Msg 1 and the additional Msg 1.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communication by an apparatus. A method includes receiving a synchronization signal, the synchronization signal including timing information associated with a directional beam sweep procedure, and power threshold information indicating beam power criteria evaluated during the directional beam sweep procedure; receiving, from the directional beam sweep, a first directional beam in accordance with the timing information, the first directional beam providing radio frequency energy for energy harvesting by the apparatus; measuring an amount of power associated with the first directional beam; comparing the measured amount of power to the power threshold information; and providing a feedback signal, wherein the contents of the feedback signal are based on the comparison with the power threshold information associated with the directional beam sweep.