Abstract: Methods, systems, and devices for wireless communications are described. An energy transmitter device may transmit an energy signal to an energy receiver device for energy harvesting by the energy receiver device. To communicate channel state information (CSI) of a channel between the energy transmitter device and the energy receiver device, the energy transmitter device may transmit a first signal to the energy receiver device. In response, the energy receiver device may transmit a second signal to the energy transmitter device that is indicative of the CSI, where the CSI is based on the first signal. The energy transmitter device may transmit additional signals to the energy receiver device whose transmission characteristics are based on the CSI.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may transmit feedback signaling for received sidelink messages to both the base station and the transmitting UE. The receiving UE may multicast a feedback message to both the base station and the transmitting UE on a physical uplink control channel (PUCCH) or on a physical sidelink feedback channel (PSFCH). The base station may configure the receiving UE with resources, the transmitting UE may allocate resources to the receiving UE, or the base station may actively monitor for the feedback message. In some examples, the receiving UE may operate in a dual connectivity mode, and may transmit the feedback message to both the base station and the transmitting UE on both the PUCCH and the PSFCH.

Abstract: Methods, apparatuses, and computer-readable medium for sidelink communications may be provided. An example method may include receiving, from a second UE, a sidelink communication. The example method may include transmitting, to the second UE based on the sidelink communication, a physical sidelink feedback channel (PSFCH), the PSFCH spanning multiple symbols in a time domain, including a set of repetitions in a frequency domain, or spanning more than one resource blocks (RBs).

Abstract: Methods, systems, and devices for wireless communications are described for improving sidelink communication reliability. In some examples, a user equipment (UE) may map allocated sidelink resources from a logical domain to a physical domain, where the mapped resources may include greater frequency diversity in the physical domain A frequency range of a sidelink control channel or of a sidelink data channel may be greater in the physical domain than in the logical domain after the mapping. In some examples, sidelink communications may be associated with an aggregation factor that represents a number of repetitions of a sidelink communication. In this example, a UE may repeat a sidelink communication within a contention-based resource pool a number of times before receiving feedback in order to increase communication reliability. A first UE may communicate a sidelink communication with a second UE using a resource mapping or repetitions of the sidelink communication.

Abstract: Aspects of the present disclosure provide techniques for configuring a search space for sidelink communications between one or more sensors/actuators (SAs) and programmable logic controller (PLC) in internet of things (IoT) applications in order to minimize the number of subchannels that a receiver (e.g., PLC or SA) may need to blind decode. More particularly, the search space is configurable based on a hashing function that is based in part on a portion of the resources (e.g., PLC resources) that have been allocated or reserved for sidelink communication within the PLC subnetwork (or PLC group) from the sidelink resource pool available to a plurality of PLCs in a network. By limiting the search space to a subset of resources that are specific to the PLC subnetwork or group, the need for the SA or PLC to perform blind decoding of sidelink control information (SCI) may be further reduced.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a grant to a first user equipment (UE) that indicates a resource allocation for a sidelink communication, either from the first UE to a second UE or from the second UE to the first UE. The grant may include a destination identifier associated with the sidelink communication, as well as a mapping between the resource allocation and the destination identifier. The destination identifier may be based on information in an indication received from the first UE. In some examples, the base station may configure a default receiver UE for transmissions from the first UE, and the base station may identify a receiver UE in the grant if the intended receiver UE is different than the default receiver UE.

Abstract: Methods, systems, and devices for wireless communications are described. The method may involve a first user equipment (UE) receiving an indication of a set of sidelink resources and an indication of a set of uplink resources for transmitting sidelink feedback information. The first UE may receive a sidelink shared channel transmission from a second UE and upon receiving the sidelink shared transmission, generate feedback information regarding the sidelink shared channel transmission and transmit the feedback information directly to the base station using the set of uplink resources.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink message indicating a set of resources on which an uplink message is scheduled to be transmitted by the UE. The UE may identify a scheduling conflict with at least a portion of the set of resources, where the scheduling conflict may arise between the uplink message and a second communication at the UE. A network entity may for a cancellation indication indicating that transmission of the uplink message on at least a portion of the set of resources is preempted based at least in part on a scheduling conflict at the UE. The UE may transmit a cancellation indication to indicate that transmission of the uplink message on at least the portion of the set of resources is preempted based on the scheduling conflict.

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may be configured to transmit a first sidelink control information (SCI) message associated with a first sidelink transmission from the first UE, the first SCI including a first indication of a first set of resources reserved for retransmissions of the first sidelink transmission at one or more retransmission occasions. The UE may identify a second SCI message associated with the first SCI message, the second SCI message including frequency domain resource allocation (FDRA) field values indicative of a second set of resources reserved for retransmissions of a second sidelink transmission, where the second SCI provides a release of at least some of the reserved resources. Additional aspects of signaling one or more configurations via resource indication fields are described.

Abstract: Aspects of the present disclosure provide techniques for sidelink repeating operations, such as by using an assisting node (e.g., a smart repeater, relay, or reflector) to enhance sidelink communication reliability. For example, one or more assisting nodes may be configured by a network entity and repeat sidelink communications for two or more user equipments (UEs). In aspects, an assisting node may receive, from the network entity, an indication of resources available for sidelink communications between a first UE and a second UE. The assisting node may also receive signaling that configures the assisting node to repeat sidelink communications between the first and the second UEs over the indicated resources. The assisting node then repeats sidelink communications between the first and the second UEs according to the received signaling.

Abstract: According to one aspect of the present disclosure, a method of wireless communication performed by a first wireless communication device includes: initiating a registration protocol for performing repeater operations for sidelink communications; transmitting, to a second wireless communication device, a sidelink capability report indicating sidelink repeating capabilities of the first wireless communication device; receiving a sidelink repeating configuration based on the sidelink capability report; and communicating a first signal based on the sidelink repeating configuration.

Abstract: Aspects relate techniques for facilitating resumption of a sidelink transmission after cancellation of the sidelink transmission within resources that overlap with an additional transmission. A transmitting wireless communication device may receive control information from a network entity including a cancellation indication indicating overlapping resources between the resources scheduled for the sidelink transmission and resources scheduled for the additional transmission. Based on the cancellation indication, the transmitting wireless communication device may cancel the sidelink transmission within cancelled resources including at least the overlapping resources and transmit the sidelink transmission via remaining resources of the scheduled resources for the sidelink transmission outside of the cancelled resources.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may have a capability to support a number of temporally overlapping sidelink transmissions. The network may transmit first and second signaling that schedule temporally overlapping first and second sidelink transmissions based on first and second configured grants. The UE may transmit at least one of the first or second sidelink transmissions based on whether the first sidelink transmission and the second sidelink transmission are associated with a same beam or different beams and a frequency relationship between the first and second sidelink transmissions. If the UE is not capable of transmitting the first and second sidelink transmissions concurrently, the UE may transmit the sidelink transmission associated with the higher priority. The first and second sidelink transmissions may be scheduled with overlapping frequency resources.

Abstract: Aspects relate to a base station configured to transmit a message to a sidelink (SL)-repeater, configuring the SL-repeater to transmit sidelink synchronization signal blocks (S-SSBs) including S-SSB index numbers, receive a SL-node identification and a preferred S-SSB index number, and transmit the SL-node identification and the preferred S-SSB index number to the SL-repeater. The base station may be configured to transmit a first message configuring a SL-repeater to broadcast a sidelink discovery message, receive a sidelink discovery report from the SL-repeater identifying discovered SL-node(s), and transmit a second message activating the SL-repeater for sidelink communication with the SL-node(s).

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for wireless energy transfer. A network entity may obtain a report indicative of a capability of a UE to transmit an energy transfer signal on at least one of a downlink band of an FDD configuration or at least one of a downlink symbol or a downlink slot of a TDD configuration, and output at least one of the TDD configuration or the FDD configuration for the energy transfer signal. The TDD configuration may include the at least one of the downlink symbol or the downlink slot and the FDD configuration may include the downlink band. The UE may receive the configuration for downlink resources in at least one of time or frequency and transmit an energy transfer signal on one or more of the downlink resources.

Abstract: Methods, systems, and devices for wireless communications are described. An energy receiver may receive a first message that includes information indicative of a time division duplex (TDD) configuration for wireless energy and information transfer, the TDD configuration indicating a temporal arrangement of energy and information resources. In some examples, an energy transmitter may configure the TDD configuration as cell-specific, energy receiver-specific, or using a slot format indication (SFI). In addition, the TDD configuration may include flexible resources able to be used for energy or information transfer. The energy receiver may receive one or more energy signals during the energy resources in accordance with the TDD configuration, the one or more energy signals providing energy to the energy receiver. Accordingly, the energy receiver may transmit one or more information signals during the information resources in accordance with the TDD configuration.

Abstract: Disclosed are techniques for communication. In an aspect, a position estimation entity includes determines common assistance data for a joint position estimation group, and sends to first and second UEs. The position estimation entity further sends indications of which PRS resources associated with the common assistance data is active for the first and second UEs. The position estimation entity receives measurement information from the first and/or second UEs, and derives position estimations of the first and second UEs.

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for a first user equipment (UE) to manage the reuse of resources reserved for sidelink communications by the UE. The first UE may identify scheduling information for a sidelink shared channel between the first UE and a second UE, and the first UE may reserve a set of resources for subsequent sidelink communications by the first UE. The first UE may transmit a sidelink control message indicating the scheduling information and the reserved resources to one or more neighboring UEs. The sidelink control message may include a reuse allowance indicator that may indicate whether the set of reserved resources is available for spatial reuse by the neighboring UEs. The neighboring UEs may determine whether the reuse the reserved resources based on the control message, the reuse allowance indicator, or both.

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support the transmission of a scheduling request via a physical sidelink feedback channel (PSFCH). In some cases, a user equipment (UE) may determine a configuration of a set of PSFCH resource blocks (RBs). The UE may receive a first bit map that may indicate a subset of the set of PSFCH RBs allocated for transmitting a scheduling request on the PSFCH, and the UE may receive a second bit map that may indicate a second subset of the PSFCH RBs allocated for hybrid automatic repeat request (HARQ) messages. The UE may transmit a scheduling request via one or more RBs of the first subset of the PSFCH RBs. In some cases, the UE may generate a waveform for transmitting the scheduling request message, and the waveform may be based on the number of RBs selected.

Abstract: Some aspects described herein relate to transmitting, to a receiving user equipment (UE), an indication of a fixed size transport block size (TBS) used for a sidelink transmission, and transmitting, to the receiving UE and based at least in part on the fixed size TBS, the sidelink transmission over sidelink resources. Other aspects relate to the receiving UE receiving the indication and the sidelink transmission. Additional aspects relate to a base station for configuring the sidelink resources for fixed size TBS.