Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive configuration information indicating a sidelink resource pool, a time gap, and a periodicity of feedback occasions. The UE may generate feedback bits associated with multiple received sidelink messages based on the configuration information. The UE may transmit the feedback bits in a single, multi-bit feedback message according to one or more rules. In some examples, the UE may drop one or more sets of feedback bits (e.g., in the case of a collision of too many feedback messages in a single slot) based on a weighted average priority level of one or more valid feedback bits in each of multiple sets of feedback bits.

Abstract: A solid state additive method includes: disposing a round consumable rod in a hollow stirring tool; based on a coating layer height, setting a gap between a bottom surface of the hollow stirring tool and a base surface; driving the hollow stirring tool to rotate at a first rotation speed; driving the consumable rod to rotate at a second rotation speed, where the second rotation speed and the first rotation speed are different in angular speed to form a differential, such that the consumable rod rubs against an inner wall of the hollow stirring tool to generate thermal deformation so as to obtain a plastic deformation flow in the hollow stirring tool; pressing the consumable rod downward to enable the plastic deformation flow to be in friction contact with the base surface; translating the hollow stirring tool and stirring the base surface.

Abstract: A friction stir tool cooling method is used for cooling a stirring pin and/or a shaft shoulder of a friction stir tool, it includes that the coolant is introduced into an inlet of a cooling channel, the cooling channel is provided inside the friction stir tool, and the inlet is provided on the side wall of the friction stir tool. The coolant flows downwards to the vicinity of the stirring pin and/or the shaft shoulder, the coolant turns upwards and flows out of the friction stir tool from an outlet. The outlet is provided on the side wall of the friction stir tool.

Abstract: Disclosed are a proton exchange membrane made of a crystalline sulfonated polyimide block copolymer, a preparation method and use thereof. The crystalline sulfonated polyimide block copolymer has a chemical structure as shown in Formula (I), in which Ar1 group is an aromatic group containing a naphthyl group, Ar2 group is an aromatic group containing at least one sulfonate group, and x is in the range of 5-100, m is in the range of 1-200, and n is in the range of 5-500.

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: Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE) generally including receiving signaling indicating a set of physical random access channel (PRACH) configurations, receiving,, a physical downlink control channel (PDCCH) order to trigger a PRACH transmission associated with an additional PCI different from a first PCI associated with a serving cell, transmitting a PRACH associated with the additional PCI based on one PRACH configuration of the set of PRACH configurations that is associated with the additional PCI, receiving an indication of a timing advance (TA) associated with the additional PCI, and applying the TA for an uplink transmission associated with the additional PCI.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform, in an occasion during an idle period associated with a frame based equipment (FBE) mode, measurements to determine a received signal strength indicator (RSSI). Accordingly, the UE may transmit, to a base station, a report based at least in part on the RSSI. In other aspects, a UE may perform, during an idle period associated with an FBE mode, measurements on a sidelink channel. Accordingly, the UE may determine a sidelink RSSI (SL RSSI) using the measurements. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for type-1 hybrid automatic repeat request (HARQ) codebook usage and hashing for multi-bit sidelink feedback. Certain aspects provide a method for wireless communication by a first user equipment (UE). The method generally includes receiving, from a second UE, one or more sidelink data messages over a first subchannel during a time period having a duration of a first number of slots that is greater than one and transmitting, to the second UE, over a plurality of resource blocks of a sidelink feedback channel resource of a first feedback channel occasion of a set of periodically occurring feedback channel occasions, a first feedback message associated with the one or more sidelink data messages, wherein the first feedback message indicates a plurality of feedback bits comprising one or more feedback bits associated with the one or more sidelink data messages.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may start a timer after transmitting an uplink communication on a physical uplink shared channel to a base station using a configured grant. The UE may determine whether the uplink communication is acknowledged as received by the base station based at least in part on determining whether a downlink communication from the base station is detected within a time duration associated with the timer. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communication at a user equipment (UE) are described. The UE may be configured to support uplink power control for multiple random access channel (RACH) procedures. A medium access control layer entity at the UE may maintain multiple sets of counters and parameters for multiple simultaneous RACH procedures. In some cases, the UE may perform simultaneous RACH procedures with network entities associated with different timing advance groups, and the UE may associate the counters and parameters of the RACH procedure with the timing advance group. In other cases, the UE may associate the counters and parameters of the RACH procedure with multiple control resource set pool indexes which may correspond to multiple transmission reception points. Each set of counters may be associated with an uplink power control that the UE may use to determine the PRACH transmission power for each RACH procedure.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, a configuration that indicates a time alignment timer associated with a timing advance group (TAG) for a bandwidth part (BWP) or a component carrier (CC) configured for multiple downlink control information (multi-DCI) based multiple transmission reception point (multi-TRP) communications. The UE may start the time alignment timer for a TRP. The UE may flush one or more hybrid automatic repeat request (HARQ) identifiers (IDs) from a HARQ buffer associated with the TRP based at least in part on an expiration of the time alignment timer. Numerous other aspects are described.

Abstract: In some implementations, a user equipment (UE) may transmit, to a network entity, a report associated with a UE capability for supporting a common timing advance (TA) configuration, wherein the report indicates one or more of: a supported TA type that includes one of an independent TA or a common TA; or a quantity of timing advance groups (TAGs) for a carrier aggregation. The UE may receive, from the network entity, a TA configuration based at least in part on the report.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network entity, a scheduling request that indicates full antenna panel availability or partial antenna panel availability. The UE may receive, from the network entity, an uplink grant that schedules an uplink communication in connection with the scheduling request, wherein the uplink grant is based at least in part on the full antenna panel availability or the partial antenna panel availability indicated by the scheduling request. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicating a first uplink message using a first uplink carrier and a first timing advance (TA) value associated with a first transmission configuration indicator (TCI) state and a second uplink message using a second uplink carrier and a second TA value associated with a second TCI state for the UE. The UE may receive a timing advance group (TAG) configuration which indicates a TA value to apply for a supplementary uplink (SUL) carrier of the serving cell, which is one of the first TA or second TA values. The UE may then transmit a SUL message using the SUL carrier of the serving cell in accordance with the TA value determined for the SUL carrier based on the TAG configuration for the UE.

Abstract: A method of wireless communication performed by a wireless communication device includes: communicating a plurality of timing advance group (TAG) indicators, wherein each TAG indicator is associated with at least one cell of a plurality of cells, wherein at least one of the plurality of cells is configured with two CORESET pool index values and two TAG indicators. The method further includes communicating, at a first time based on a first TAG indicator associated with a first reference cell of the plurality of cells, a first communication signal, wherein the first reference cell is based on a number of CORESET pool index values and TAG indicators associated with at least one of the plurality of cells.

Abstract: Methods, systems, and devices for wireless communications are described. A first UE may receive a message indicating a configuration or a sidelink discovery burst transmission window. The configuration may include time periods for transmitting multiple sidelink synchronization signals. The first UE may perform a channel access procedure during the sidelink discovery burst transmission window. The first UE may perform the channel access procedure for transmitting one or more of the sidelink synchronization signals according to a pattern indicated by the configuration. The pattern may be based on a quasi co-location relationship between associated pairs of the sidelink synchronization signals. The first UE may transmit the one or more sidelink synchronization signals to a second UE in accordance with the pattern indicated by the configuration.

Abstract: Some aspects described herein relate to transmitting, by a first user equipment (UE), a cooperation discovery signal related to cooperative communication, and receiving, from one or more second UEs and in response to the cooperation discovery signal, a request to connect with the first UE for cooperative communication. Other aspects relate to receiving the cooperation discovery signal and transmitting the request in response to the cooperation discovery signal.

Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a first UE may be configured to transmit multiple sidelink synchronization signal blocks (S-SSBs) within an S-SSB period, the transmissions back-to-back or non-back-to-back. The first UE may determine one or more listen-before-talk occasions associated with the S-SSBs, participate in at least one listen-before-talk procedure during a listen-before-talk occasion, and transmit the multiple S-SSBs to a second UE. In some other examples, the first UE may identify a reference frequency position of a reference S-SSB in a sidelink BWP. The first UE may transmit the reference S-SSB and one or more additional S-SSBs to a second UE, the one or more additional S-SSBs having frequency positions following the reference frequency position.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine a timing advance value to use for an uplink transmission based on a unified transmission configuration indicator (TCI) state associated with the uplink transmission. In some examples, the control signaling configuring a unified TCI state for an uplink transmission may indicate the timing advance value for the uplink transmission. In some examples, the UE may receive control signaling indicating an association between a set of timing advance values for the component carrier associated with a set of unified TCI states or a set of unified TCI groups, and the UE may determine the timing advance value for a given uplink transmission based on the TCI state or TCI group indicated for the uplink transmission.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a serving cell associated with a first transmission reception point (TRP) and for two or more other cells associated with two or more other TRPs, the serving cell and the two or more other cells associated with a same component carrier. The UE may receive a first timing advance configuration associated with the serving cell and a second one or more timing advance configurations associated with the two or more other cells. The UE may transmit an uplink communication in accordance with the first timing advance configuration or the second one or more timing advance configurations. Numerous other aspects are provided.