Abstract: Aspects described herein relate to preempting or cancelling sidelink or uplink communications, by a base station or a user equipment (UE). In an aspect, a base station can determine to schedule a first device to communicate, in first resources, sidelink communications having a first priority, determine to schedule a second device to transmit, in second resources, sidelink or uplink transmissions having a second priority, wherein the second resources overlap the first resources at least in a time domain, and transmit, based on the first priority and the second priority, an indication to the first or second device to preempt or cancel sidelink communications or uplink transmissions in associated resources. In another aspect, a UE can receive an indication to cancel sidelink transmission over sidelink resources previously scheduled for the sidelink transmission, and can refrain from the sidelink transmission over the sidelink resources.

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for using different configurations for downlink or uplink transmissions associated with different transmission configuration indication (TCI) states (e.g., transmitted on different beams). In one example, a base station may use different configurations for downlink transmissions to a user equipment (UE), and the base station may indicate the different configurations to the UE. For instance, the base station may transmit downlink control information (DCI) indicating a baseline configuration and other configurations as a delta of the baseline configuration. In another example, a base station may dynamically indicate a timing advance to a UE (e.g., in DCI or flow control feedback) for an uplink transmission from the UE associated with a TCI state, and the UE may use the dynamically indicated timing advance for uplink transmissions associated with the TCI state.

Abstract: This disclosure provides methods, devices and systems for facilitating device-to-device (D2D) communications on sidelinks. Some implementations more specifically relate to a user equipment (UE) determining sidelink communication parameter corresponding to UE assistance information or UE capability information. The UE may also determine an attribute associated with the sidelink communication parameter, the attribute indicating the sidelink communication parameter is a dynamic parameter or a static parameter. The UE may further transmit to another UE, on a sidelink, the sidelink communication parameter and the attribute. The UE may also communicate with the other UE on the sidelink based on the transmitted sidelink communication parameter and the attribute.

Abstract: The described techniques relate to improved methods, systems, devices, and apparatuses that support configurations for sidelink beam management. In some cases, a base station may determine sidelink beams for beam sweeping and instruct a user equipment (UE) which sidelink beams to use. The base station may determine the sidelink beams for beam sweeping based on a report sent from the UE. In other cases, the UE may determine transmission sidelink beams for beam sweeping based on the UE capabilities beam input from the receiving UE, or the base station determining which beams to use and allocating resources for the beam sweeping. Additionally or alternatively, the base station may determine a portion of the sidelink beams for beam sweeping and the UE may determine a portion of the sidelink beams to use for beam sweeping in addition to the beams indicated by the base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, to a base station, a request for a cell switch based at least in part on a trigger condition associated with an uplink-only cell switch being satisfied; and perform the uplink-only cell switch based at least in part on a physical-layer or medium-access-control layer inter-cell mobility operation with the base station based at least in part on transmitting the request. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for determining shared resources associated with one or more user equipments (UEs) for sidelink communications, including control resources and data resources. A first UE may transmit a sidelink request to reserve a subset of data resources to a second UE, and may monitor for one or more sidelink responses indicating a positive sidelink response to the sidelink request, a negative sidelink response to the sidelink request, or both. The second UE may transmit a positive sidelink response if it is available for a data transmission. A third UE may transmit a negative sidelink response if it objects to the data transmission. The first UE may determine, based on monitoring for the one or more sidelink responses, whether to transmit a sidelink confirmation indicating a reservation of the subset of the data resources to the second UE.

Abstract: Certain aspects provide a method for wireless communication by a first user-equipment (UE). The method generally includes applying a discontinuous reception (DRX) configuration for the first UE, monitoring for first signaling from a second UE indicating that the second UE has data to send to the first UE, the first signaling being transmitted using a plurality of transmit beams during a DRX cycle of the DRX configuration, selecting one or more transmit beams of the plurality of transmit beams based on the monitoring of the first signaling, and communicating in accordance with the selection.

Abstract: Certain aspects of the present disclosure provide techniques for dynamically scheduling antenna resources of a wireless node, such as, antenna panels of a user equipment (UE). In some cases, a first node (e.g., a UE) performs, with two or more other nodes, a first beam sweep procedure across two or more antenna resources of the first node on two or more wireless interfaces, generates or obtains scheduling information based on results of the first beam sweep procedure, wherein the scheduling information indicates which of the antenna resources is scheduled for which wireless interfaces, and communicates with the other nodes on the wireless interfaces according to the scheduling information.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a configured grant that indicates time-frequency resources for a user equipment (UE) to use to transmit sidelink or uplink messages in a wireless communications system. To reduce the amount of low priority traffic that may interfere with higher priority traffic, the base station may configure a threshold probability to allow high priority sidelink transmissions and to cancel low priority transmissions. The base station may transmit a cancellation indication that includes a priority indication instructing the UE to cancel transmissions having a priority less than a priority threshold during the allocated time-frequency resources. Based on transmitting the cancellation indication, the base station may cancel transmissions that have low priority, and the UE may determine whether to transmit (or to refrain from transmitting) one or more messages based on the priority of the message.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for training a beam for multiple component carriers (CCs) for concurrent communications in a wireless communications system associated with limited user equipment (UE) capabilities. The UE receives, via a first receive beam, a first reference signal on a group of CCs over a first symbol. The UE also receives, via a second receive beam, a second reference signal on the group of CCs over a second symbol. The UE selects a receive beam for a subsequent communication based on determining a value of a parameter for each of the first and the second receive beam.

Abstract: A method of wireless communications by a sidelink UE (user equipment) includes receiving a first signal as part of a discontinuous reception (DRX) wake-up procedure at the beginning of a sidelink discontinuous reception (DRX) ON duration. The method also includes transmitting a response to the first signal as part of a DRX wake-up procedure. The method further includes starting a timer after sending the response. The method still further includes entering a sleep state upon not receiving a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) before the timer expires.

Abstract: Methods, systems, and devices for wireless communication are described. For a user equipment with a number of M greater than or equal to two antennas, a signal is transmitted from at least a first antenna and a second antenna at a first time with an initial relative phase state including a first relative phase rotation between the signals transmitted by the first and second antennas. In response to a determination that a response signal was not received at the user equipment, the signal is retransmitted from at least the first antenna and the second antenna with a subsequent relative phase state among the transmitting antennas, including a second different relative phase rotation, at a second time. The second time may be the next subsequent retransmission of the signal or may be a retransmission following one or more retransmissions using the first relative phase rotation.

Abstract: Aspects described herein relate to preempting or cancelling sidelink or uplink resources of one or more devices to allow sidelink or uplink transmissions of one or more other devices, and/or determining subsequent resources for transmitting communications based on the preempted or cancelled sidelink or uplink resources. In an aspect, an indication to preempt receiving communications or cancel transmitting communications over scheduled resources can be received, and based at least in part on the indication, subsequent resources over which to receive or transmit the communications can be determined. The communications can be received or transmitted in the subsequent resources.

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit a capability message indicating a parameter configuration for each phase error process of a set of phase error processes of the first UE. The first UE may transmit, to a second UE, a phase error process indicator to indicate that the first UE is using a first phase error process of the set of phase error processes to generate a sidelink transmission in accordance with the parameter configuration for the first phase error process. The second UE may monitor, via a sidelink channel, for the sidelink transmission based on frequency tracking, phase tracking, time tracking, or any combination thereof being performed in accordance with the parameter configuration for the first phase error process. The first UE may transmit, via the sidelink channel, the sidelink transmission to the second UE.

Abstract: The present disclosure provides an optical imaging lens assembly and an electronic device. The optical imaging lens assembly includes, sequentially from an object side to an image side along an optical axis, a window member; a first lens having a positive refractive power, and an object-side surface of the first lens being a convex surface; a second lens having a negative refractive power; and at least one subsequent lens having a refractive power, wherein an entrance pupil diameter EPD of the optical imaging lens assembly and half of an effective aperture DTg of the window member at an object-side surface thereof satisfy: EPD/DTg>1.6, which makes the optical imaging lens assembly have the characteristics of high resolution and miniaturization. When the optical imaging lens assembly is installed on an electronic device, it can minimize the impact on the full-screen display.

Abstract: Techniques, systems, and devices for wireless communications are described. A user equipment (UE) may be in communication with a first and second transmitting device (e.g., by sidelink communication links). The UE may receive, from the first transmitting device, a first reference signal on a first set of resources. The UE may additionally receive, from the second transmitting device, a second reference signal on a second set of resources that overlap in the time domain with the first set of resources. In some cases, the first and second set of resources may additionally overlap in the frequency domain. The UE may determine synchronization information for time tracking or frequency tracking of sidelink communications with the first and second transmitting devices based on the first and second reference signals. The UE may communicate with the first and second transmitting devices based on the synchronization information for time tracking or frequency tracking.

Abstract: The present disclosure discloses an optical imaging system which includes, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power with an object-side surface being concave and an image-side surface being convex; a fourth lens having refractive power; a fifth lens having positive refractive power with an object-side surface being convex; a sixth lens having negative refractive power with an object-side surface being concave and an image-side surface being concave. An effective focal length f of the optical imaging system and half of a maximum field-of-view angle Semi-FOV of the optical imaging system may satisfy f*tan(Semi-FOV)>4.4 mm.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a first user equipment (UE) establishing a sidelink connection with a second UE. The first UE may identify a frame structure for the first UE to communicate with a base station. The frame structure may include one or more downlink slots and one or more uplink slots. The base station may indicate a set of resources for the sidelink connection with the second UE. The set of resources may include at least one downlink slot of the one or more downlink slots. In accordance with the indication, the first UE may communicate with the second UE on the sidelink connection and using at least one beam and the indicated set of resources. The communication with the second UE may utilize at least the resources in the at least one downlink slot.

Abstract: Methods, systems, and devices for wireless communications are described. Sidelink UEs may be configured with a synchronization reference signal that may be used by the UEs to synchronize time and frequency resources. A first and second UE may perform a beam sweeping procedure to identify transmit and receive beams to use for communications between the UEs. A synchronization reference signal procedure may be initiated and the first UE may receive a sidelink synchronization reference signal from the second UE using the established receive beam. The UEs may align time and frequency resources for communications between the UEs and the UEs may communicate via the sidelink channel based on the time synchronization, frequency synchronization, or both, determined using the sidelink synchronization signal. In some cases, a sidelink UE may receive multiple synchronization reference signals from multiple sidelink UEs simultaneously, where each synchronization reference signal may include a UE identifier.

Abstract: Some aspects described herein relate to configuring user equipment (UE) for performing sidelink (SL) random access (RA) procedures, which may include assistance from a base station or other network component. One or more parameters for performing a random access procedure with a second UE over a sidelink can be received from a base station. A first random access message can be transmitted to the second UE as part of the random access procedure over the sidelink. A second random access message can be received, from the second UE, in response to transmitting the first random access message, and as part of the random access procedure over the sidelink, where at least one of transmitting the first random access message or receiving the second random access message are based on the one or more parameters.