Abstract: Methods, systems, and devices for wireless communications are described. An energy harvesting device, such as a user equipment (UE) or a radiofrequency identification (RFID) tag, may transmit a control message indicating a capability of the energy harvesting device to use one or more energy sources for energy harvesting. The energy harvesting device may receive, in accordance with the capability indicated in the control message, control signaling indicating one or more parameters associated with the energy harvesting. The energy harvesting device may perform, during an energy harvesting measurement window, an energy harvesting procedure to produce one or more energy harvesting measurements and transmit an energy harvesting report indicating the one or more energy harvesting measurements and an efficiency metric for the energy harvesting from at least one of the one or more energy sources during the energy harvesting measurement window.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit information that indicates a transmission (Tx) capability and a reception (Rx) capability respectively related to transmitting and receiving a sidelink communication over an unlicensed channel. The UE may receive a configuration that indicates, within a sidelink slot, a first candidate starting symbol and a second candidate starting symbol for a sidelink transmission, wherein the second candidate starting symbol is based on one or more of the Tx capability or the Rx capability. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for determining transport block sizes for sidelink communications. In one example, a method for wireless communications by a user equipment includes determining, based on an initial allocation of physical resource blocks (PRBs) in one or more sub-channels that are non-overlapping with a guard band within a resource pool for a sidelink communication, that an occupied channel bandwidth (OCB) threshold is not met for the sidelink communication; allocating one or more additional PRBs from the resource pool to the sidelink communication in order to meet the OCB threshold, wherein the one or more additional PRBs comprise at least one of: all partial sub-channel PRBs in a sub-channel of the resource pool partially overlapped by the guard band; or all boundary PRBs within the resource pool, but not allocated to a sub-channel of the resource pool.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an interlace configuration for a sidelink resource pool. The UE may transmit a physical sidelink control channel (PSCCH) communication scheduling a physical sidelink shared channel (PSSCH) communication for transmission in the sidelink resource pool, wherein the PSCCH communication is mapped to a set of resources based on a mapping rule in accordance with the interlace configuration. Numerous other aspects are described.

Abstract: The apparatus of wireless communication includes a UE and a base station. The base station may transmit, to the UE, a configuration for a plurality of PDCCH monitoring groups for monitoring different sets of search spaces. The plurality of PDCCH monitoring groups may include a first PDCCH monitoring group with a first number of PDCCH monitoring occasions and a second PDCCH monitoring group with a second number of PDCCH monitoring occasions different from the first number. The base station may determine which PDCCH monitoring group to send a PHCCH, and transmit the PDCCH to the UE. The UE may determine to monitor search spaces of the PDCCH monitoring group, and monitor search spaces corresponding to the PDCCH monitoring group. The UE may switch between the first and second PDCCH monitoring groups based on a condition or an indication from the base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE via a sidelink, channel occupancy time (COT) sharing information (COT-SI) associated with a first portion of a COT. The UE may identify, based at least in part on the COT-SI, that the first UE is an eligible repeater UE of the COT-SI. The UE may transmit, based at least in part on the first UE being the eligible repeater UE of the COT-SI, a communication using the first portion of the COT, the communication including a repeated COT-SI. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may map a physical sidelink shared channel (PSSCH) transmission to a carrier of a shared radio frequency spectrum band for performing wideband operations, the carrier including a quantity of listen-before-talk (LBT) sub-bands, where the wideband operations are associated with sidelink communications using bandwidth that exceeds a threshold bandwidth. The UE may perform respective LBT procedures for the quantity of LBT sub-bands, and may determine whether to transmit a portion of the PSSCH transmission via a subset of the LBT sub-bands based on at least one LBT procedure of the respective LBT procedures failing.

Abstract: A method for wireless communication by a wireless communication device includes transmitting, to a network node, a capability report indicating a group of ambient transmission modes supported by the wireless communication device and one or more ambient transmission parameters. The method also includes switching from a current ambient transmission mode, of the group of ambient transmission modes, to a second ambient transmission mode, of the group of ambient transmission modes, based on satisfying a first switching condition of a group of switching conditions associated with switching from the current ambient transmission mode to the second ambient transmission mode. The method further includes communicating with the network node according to the second ambient transmission mode in accordance with switching to the second ambient transmission mode.

Abstract: A configuration for transmission control for multi-relay based communication. The apparatus determines a priority of data transmission at each relay of a plurality of relays between the base station and at least one UE. The apparatus transmits a PDSCH comprising control information for the at least one UE and a priority indication instructing each relay of the plurality of relays which data is contained in the PDSCH. The PDSCH may include an indication indicating whether data corresponding to the at least one UE is contained in the PDSCH. The PDSCH may include a field that identifies data and a corresponding UE of the at least one UE that is contained in the PDSCH. The apparatus may transmit, to each relay of the plurality of relays, the priority of data transmission, wherein the priority of data transmission includes a priority for uplink and downlink transmissions.

Abstract: Methods, systems, and devices for wireless communication are described. An unlicensed sidelink band that includes multiple resource block sets may be used to communicate control information, where a guard band may be positioned in frequency between a first resource block set and a second resource block set of the multiple resource block sets. Based on communicating control information, a control message may be communicated using the first resource block set. The control message may indicate that a portion of the first resource block set and a portion of the guard band have been allocated to a data channel. Based on the control message, a data message may be communicated using resource blocks in the first resource block set and resource block in the guard band.

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support channel occupancy time (COT) sharing and resuming based on physical sidelink feedback channels (PSFCHs) in sidelink-unlicensed (SL-U) wideband operations. In a first aspect, a method of wireless communication includes a COT-initiating user equipment (UE) establishing a wideband COT associated with multiple resource block (RB) sets. The COT-initiating UE transmits a COT structure information (COT-SI) including a first indication enabling COT sharing with neighboring UEs and a second indication allowing transmission of PSFCHs. The COT-initiating UE identifies the shared RBs before resuming transmission in the COT using available RBs. The responding UEs would receive the COT-SI allowing sharing and transmission of PSFCHs and will identify at least one selected PSFCH within the COT that is associated with the COT-initiating UE prior to sharing the COT with PSFCH transmissions.

Abstract: Random access procedures for low-power devices are described herein. In one example, a method for random access includes receiving, from a network entity during a random access response monitoring window, a random access response, including: an identifier associated with the network entity; and an uplink resource allocation; and sending, to the network entity, an uplink message scrambled with the identifier, the uplink message comprising: an identifier associated with the user equipment; and a setup request.

Abstract: Disclosed are systems and techniques for wireless communications. For instance, a wireless relay device can receive a first Physical Downlink Shared Channel (PDSCH) communication and determine, from the PDSCH communication, a first combined transport block including a plurality of components, the plurality of components including a first control component associated with a first user equipment (UE). The relay device can generate a first transport block that includes the first control component and transmit the first transport block.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of receiver capability information associated with an Internet-of-Things (IoT) device. The UE may receive a signal that is based at least in part on the receiver capability information. In some aspects, the UE is the IoT device. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. Prior to performing a listen before talk (LBT) procedure, a user equipment (UE) may perform a resource selection procedure to select a resource for transmission of a sidelink message and select multiple candidate resources from a resource pool. After resource selection procedure, the UE may perform the LBT procedure to gain access to a sidelink channel and transmit the first sidelink message via the selected resource. Further, the UE may transmit sidelink control information (SCI) associated with the first sidelink message, where the SCI includes an indication of a resource for feedback of the sidelink message and at least a first retransmission resource. In such examples, the UE may select the first retransmission resource from the multiple candidate resources based on a time gap between a time slot of the sidelink message and a time slot of the resource for feedback.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to one or more other UEs, a channel occupancy time (COT) sharing indication that indicates a plurality of resource block sets associated with a shared COT. The UE may transmit, using a wideband and based at least in part on a COT sharing condition, within one or more resource block sets of the plurality of resource block sets associated with the shared COT. Numerous other aspects are described.

Abstract: A network entity may select a PSS. The PSS may be associated with an OOK bit sequence or a single carrier waveform. The network entity may transmit, for a UE, the PSS based on a synchronization raster. The synchronization raster is a multiple of a channel raster. The UE may synchronize with the network entity based on the received PSS. In one configuration, the PSS may include a time domain synchronization signal based on the single carrier waveform. In one configuration, the PSS may include a predefined OOK bit sequence.

Abstract: Methods, systems, and devices for wireless communications are described. For instance, a first UE may receive an indication of a set of resources available for preemption. The indication of the set of resources may include an indication of a group of consecutive resources. The first UE may select a first group of consecutive resources for transmitting a first message and may determine that second UE has reserved a first resource of the set of resources that overlaps with the first group of consecutive resources. The first UE may report an indication that the first resource is being preempted based on the overlap. The first UE may perform the reporting based on a first priority of a second message for the first resource relative to a second priority of the first message. The first UE may transmit the first message over a second group of consecutive resources based on the reporting.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, information associated with resource allocation for a sidelink communication, the information indicating at least one of: a random number associated with a contention window for the sidelink communication, a length of the contention window, an interference measurement associated with a sidelink channel, or a destination identifier for a target of the sidelink communication. The UE may receive, from the network node, an indication of the resource allocation for the sidelink communication. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. The method may include a first user equipment (UE) receiving a first control signal that indicates a set of sidelink resources including a set of slots within a subcarrier. The set of slots may include a first set of symbols allocated for power control signaling and a second set of symbols allocated as gap symbols. Further, the UE may receive, based on receiving the first control signal, a second control signal including an indication of whether to receive a first data signal using one or both of the first set of symbols or the second set of symbols and receive the first data signal in accordance with the indication.