Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a user equipment (UE) may utilize opportunistic cooperative relaying to support exchanging packets between UEs without establishing or maintaining beamforming alignment between the UEs. Specifically, a source UE may invite nearby UEs (e.g., helper UEs) that receive a sidelink transmission (e.g., a packet meant for a different destination UE) to perform a single frequency network (SFN)-type transmission to opportunistically relay the packet to the destination UE. The helper UEs may receive, decode, and transmit the sidelink signaling from the source UE without establishing or configuring a relay agreement with the source UE. The destination UE may receive the sidelink signaling via cascading, SFN-type transmissions by one or more helper UEs. The destination UE may respond to the sidelink signaling with feedback information via one or more helper UEs or directly to the source UE.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a base station transmitting to a user equipment (UE) a partial bandwidth configuration for uplink transmissions, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth, for example, for autonomous uplink (AUL) transmissions. The base station may also transmit to the UE an AUL configuration including a group identifier. The UE may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission based on the group identifier. In some cases, different UEs may be grouped into groups of UEs allocated non-overlapping resources, and UEs allocated overlapping resources may have different starting offsets to begin transmitting. According to the determined starting offset, the UE may perform the partial bandwidth transmission over the channel interlace and the portion of the channel bandwidth.

Abstract: Example implementations include a method, apparatus and computer-readable medium of wireless communication. A user equipment (UE) may receive a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for the UE, the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE. The UE may determine whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled.

Abstract: Wireless communications systems and methods related to communications in a network are provided. A user equipment (UE) may generate during a first time period, an uplink (UL) communication signal based on a scheduled grant or a configured UL grant. The UE may detect a downlink (DL) communication from a base station (BS) during a second time period after the first time period. The DL communication is devoid of the scheduled grant and the configured UL grant. The UE may transmit to the BS, the UL communication signal based on the scheduled grant or the configured UL grant in response to detecting the DL communication.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive downlink control information (DCI) scheduling multiple physical uplink shared channel (PUSCH) resources for a set of uplink data messages. In some examples, the scheduled PUSCH resources may overlap with reserved or preconfigured uplink resources. The UE may determine, in accordance with a multiplexing configuration, a multiplexing schedule for multiplexing the scheduled PUSCH resources with the reserved or preconfigured uplink resources. The UE may transmit the set of uplink data messages on one or more of the scheduled PUSCH resources based on the multiplexing schedule. The described techniques may enable the UE to transmit the set of uplink data messages with improved reliability based on reducing a number of collisions between the set of uplink data messages and other uplink signals transmitted on the reserved or preconfigured uplink resources.

Abstract: Methods, systems, and devices for wireless communications are described. A communication device, which may be otherwise known as user equipment (UE) may receive a downlink control information (DCI) on a physical downlink control channel (PDCCH). The DCI may include one or more of an indication of a set of transmission configuration indicator (TCI) states related to a physical downlink shared channel (PDSCH), one or more receive beams associated with the set of TCI states, or a physical downlink shared channel (PDSCH) scheme. The UE may decode the DCI and may determine a temporal period associated with the indication of the set of TCI states. The UE may receive, based on the temporal period, the PDSCH according to one or more of the set of TCI states, the one or more receive beams associated with the set of TCI states, the PDSCH scheme, or one or more default receive beams.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a first sidelink control information (SCI) message during a mini-slot of a control resource pool which is decoupled from a data resource pool for sidelink communications. The first SCI message may indicate a data message to be transmitted on a subchannel of the data resource pool to a second UE, where resources between the control resource pool and the data resource pool are mapped. The UE may receive a feedback message from the second UE for the first SCI message during a second mini-slot of the control resource pool. The feedback message may indicate whether a collision or strong interference was detected for the first SCI message. The UE may determine whether to transmit the data message or retransmit the first SCI message based on the feedback message.

Abstract: This disclosure provides systems, methods, and apparatuses to enable a user equipment (UE) and a base station to improve reception of a random access response (RAR) by the UE in an unlicensed spectrum. A network may define a procedure for calculating a random access radio network temporary identifier (RA-RNTI) specific to unlicensed spectrum based on an extended RAR window. The calculation procedure may allow UEs transmitting in the window to calculate a unique RA-RNTI and identify a RAR addressed to the UE using the unique RA-RNTI. Additionally, or alternatively, a base station may transmit a RAR including timing information associated with a corresponding random access request. Accordingly, a UE may receive the RAR and compare the timing information with its own random access request in order to determine whether the RAR is addressed to the UE. Additionally, a UE may monitor a secondary cell or a sub-band for the RAR.

Abstract: Mechanisms for cross-carrier scheduling from a first cell to a second cell in a wireless networking scheme are provided. In one aspect, a method for wireless communication includes: receiving, from a base station (BS), a first configuration for scheduling in a first cell, the first configuration comprising at least one of a first monitoring periodicity parameter or a first monitoring offset parameter associated with a search space in a second cell different than the first cell; receiving, from the BS, a second configuration for scheduling in the second cell, the second configuration comprising at least one of a different second monitoring periodicity parameter or a different second monitoring offset parameter associated with the search space in the second cell; and monitoring, in the search space in the second cell based on the first configuration and the second configuration, for downlink control information (DCI).

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support separate hybrid automatic receipt request (HARQ) acknowledgement by member user equipments (UEs) cooperating as a virtual UE for downlink transmissions. In a first aspect, a virtual UE may detect a downlink transmission, wherein the virtual UE includes two or more member UEs in communication with each other and configured to cooperate in communications with the serving base station. The virtual UE may generate one or more acknowledgement codebooks configured to indicate an acknowledgement status by the virtual UE. The virtual UE may attempt to decode the downlink transmission and report an acknowledgment indicator that reflects the result of the decoding. The acknowledgment indicator includes an acknowledgement state selected from an acknowledgement codebook associated with the member UE. Other aspects and features are also claimed and described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain a nominal resource block value associated with one or more allocated subchannels for a sidelink communication. The UE may identify a number of physical sidelink shared channel (PSSCH) resource elements to be used for a transport block size calculation based at least in part on the nominal resource block value. The UE may transmit the sidelink communication, and reserve one or more resources for one or more respective retransmissions of the sidelink communication, based at least in part on the number of PSSCH resource elements. Numerous other aspects are described.

Abstract: A method for wireless communication at a first sidelink user equipment (UE) includes performing, in a shared radio frequency band, a listen-before-talk (LBT) for a channel occupancy time (COT). The method also includes selecting a full-slot sidelink channel waveform hypothesis associated with a first starting symbol, or a half-slot sidelink channel waveform hypothesis associated with a second starting symbol, in accordance with a timing associated with clearing the LBT. The method further includes transmitting, during the COT, sidelink information to a second sidelink UE, a transport block size (TBS) associated with the COT having a fixed number of resources, the fixed number of resources being a same number of resources for full-slot sidelink channel waveform hypothesis and the half-slot sidelink channel waveform hypothesis.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may start, in a no-listen-before-talk (no-LBT) mode and after a first channel occupancy time (COT), an away period during which no transmissions are to occur in abeam direction used in the first COT. The wireless communication device may perform, during the away period, channel sensing. The wireless communication device may transmit a communication in a second COT after the away period, based at least in part on a result of the channel sensing. 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 sidelink slot format, wherein the sidelink slot format indicates a configuration of sidelink feedback resources. The UE may measure a signal, associated with a channel access procedure, after a first symbol of a first sidelink slot and prior to a mini-slot of the first sidelink slot, and wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources. The UE may transmit, using a transmission starting location of the mini-slot or of a symbol of a second sidelink slot, a sidelink communication based at least in part on the measurement of the signal, wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location. Numerous other aspects are described.

Abstract: Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first sidelink user equipment (UE) includes performing a listen-before-talk (LBT) procedure and transmitting, to a second sidelink UE based on the LBT procedure being successful, a sidelink synchronization signal block (S-SSB) in one of a plurality of candidate S-SSB locations of a slot.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a user equipment (UE) to receive a configuration for a plurality of groups of sounding reference signal (SRS) ports associated with an SRS resource, the configuration indicating one or more cyclic shift parameters for each group of SRS ports of the plurality of groups of SRS ports. The UE also can transmit one or more SRSs using at least one group of SRS ports of the plurality of groups of SRS ports based at least in part on the one or more cyclic shift parameters associated with the at least one group of SRS ports.

Abstract: A method of reducing a gaseous compound, for example, nitrogen or carbon dioxide, the method comprising the steps of subjecting the gaseous compound to plasma forming conditions to form a plasma; contacting the plasma with water or an electrolyte at a plasma-water or electrolyte-water interface, thereby to provide a dissolved plasma derived species; and electrocatalytically reducing said dissolved plasma derived species to provide a reduced compound. The plasma may for example be generated by a combination of glow discharge and spark discharge in a configuration of a pin-to-liquid with no enclosure, pin-to-liquid with nozzle enclosure, or a pin-to-liquid with a column bubbler enclosure. A catalyst, such as transition metal, maybe added, advantageously in the form of a nano structured catalyst.

Abstract: A method for wireless communication performed by a user equipment (UE) includes receiving, from a base station on a granting group common (GC)-physical downlink control channel (PDCCH), a multimedia broadcast multicast service (MBMS) downlink grant that schedules an MBMS transmission at each UE of a group of UEs that includes the UE. The method also includes receiving, from the base station on a triggering GC-PDCCH, a message indicating respective feedback resources for each UE of the group of UEs. The method further includes receiving, from the base station, the MBMS transmission. The method still further includes transmitting, to the base station via the feedback resources, a feedback report based on receiving the MBMS transmission.

Abstract: Wireless communications systems and methods related to intra-slot transmit beam selection and receive beam selection for sidelink are provided. A first user equipment (UE) transmits, to a second UE over a sidelink, a plurality of beam measurement signals in a plurality of beam directions during a first slot, wherein each beam measurement signal of the plurality of beam measurement signals includes at least one of sidelink control information (SCI) or a channel state information-reference signal (CSI-RS), and wherein the plurality of beam directions includes at least two different beam directions. The first UE receives, from the second UE, an indication of a preferred beam direction of the plurality of beam directions. The first UE transmits, to the second UE over the sidelink, data in the preferred beam direction.

Abstract: Certain aspects of the present disclosure provide techniques for utilizing and processing repeated DCI transmissions that schedule common uplink or downlink transmissions. The techniques allow a UE to decide which repeated DCI to use for determining resources for the uplink or downlink transmissions.