Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems, a base station centralized unit (CU) may communicate with a user equipment (UE) through a multi-hop backhaul architecture. This multi-hop backhaul connection may include a donor base station and any number of relay base stations connected via backhaul links. In some cases, the relay base stations or the UE may experience data congestion in a logical channel-specific buffer. The relay base stations or UE may implement backpressure signaling (e.g., in the medium access control (MAC) layer) to mitigate the congestion. A wireless device operating as a mobile termination (MT) endpoint may transmit a backpressure report message to a wireless device operating as a base station distributed unit (DU) endpoint for the logical channel. The base station DU may adjust a scheduling rate for data unit transmissions over the indicated logical channel based on the backpressure report.

Abstract: Techniques are described for wireless communication. A first method includes identifying a first interval for an uplink transmission in a shared radio frequency spectrum band; identifying a second interval for the uplink transmission; comparing the first interval with the second interval; and determining uplink resources to use for the uplink transmission based at least in part on the comparison of the first interval with the second interval. A second method includes transmitting one or more assignments of uplink resources to use for an uplink transmission in a shared radio frequency spectrum band; detecting a duration of the uplink transmission; and identifying uplink resources used for the uplink transmission based at least in part on the detecting.

Abstract: Aspects of the present disclosure provide for the pairing of an inter-band carrier with a time division duplex (TDD) carrier. If the paired band is a frequency division duplex (FDD) band, then base stations and mobile devices may transmit and receive additional thin control channels on FDD carriers to enable full duplex operations. If the paired band is a TDD band, then a conjugate or inverse carrier may be used such that full duplex, or a close approximation thereto, is achieved. With the introduction of a paired channel and fast control channels, rapid uplink/downlink switching may be achieved for TDD carriers efficiently and effectively. Other aspects, embodiments, and features are also claimed and described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine to configure a user equipment (UE) to operate in a transmission/reception point (TRP) mode, wherein the TRP mode is a single-TRP mode or a multi-TRP mode. The BS may configure the UE to operate in the TRP mode based at least in part on a bandwidth part (BWP) switch or a trigger to switch between the multi-TRP mode and the single-TRP mode within a BWP. Numerous other aspects are provided.

Abstract: Aspects of the disclosure relate to mechanisms for dynamic prioritization of uplink (UL) traffic at a user equipment (UE). In some examples, the UE may determine to delay transmission of UL traffic by skipping one or more UL transmission opportunities based on one or more factors, such as a power saving indication, a priority level of the UL traffic, a type of the UL traffic, a volume of the UL traffic, and/or current channel conditions. In some examples, the UE may be configured with a parameter controlling the ability of the UE to delay a transmission of UL traffic. In some examples, when the UE is operating in a semi-persistent scheduling mode and a power saving mode, such as a connected mode discontinuous reception (C-DRX) mode, the UE may dynamically interrupt an OFF duration of the C-DRX cycle to transmit UL traffic.

Abstract: The apparatus is configured to performing a beam scan operation. The beam scan operation may be part of an active beam scanning process. The apparatus is also configured to deactivate the beam scan process upon determining that the apparatus is in a first state corresponding to at least one of a first set of conditional states. The apparatus is configured to determine a state change of the apparatus. Additionally, the apparatus is configured to activating the beam scanning process upon determining that the apparatus is in a second state corresponding to at least one of a second set of conditional states different from the first set of states. The apparatus is also configured to performing the beam scan operation upon activating the beam scanning process.

Abstract: Methods, systems, and devices for wireless communications are described that provide for call continuity following radio link failure (RLF) through re-establishment of a voice call using a same or different radio access technology (RAT) before the call is dropped. Upon detection of RLF on a connection supporting a voice call, a UE may initiate a drop call timer and scan for available connections. The voice call may be attempted to be re-established if a connection is available on using a RAT of an existing connection. The voice call in such cases may continue without the call being dropped. Upon expiration of the drop call timer, the UE may attempt to establish a connection using a RAT identified during the duration of the drop call timer.

Abstract: Certain aspects of the present disclosure provide techniques for reference signal monitoring and transmission for remote interference management. In some cases, an aggressor base station decides to monitor for reference signals (RSs) transmitted from at least one victim BS, for example, regardless of an amount of interference from at least one remote BS detected by the first base station and participating in a remote interference mitigation (RIM) process based on the monitored RS. In some cases, a first BS transmits reference signals (RSs) as part of a remote interference mitigation (RIM) process, in response to a determination that it is an aggressor BS whose downlink transmissions possibly interfere with reception of uplink transmissions by at least one remote BS, a victim BS whose reception of uplink transmissions are possibly interfered with by downlink transmissions from the at least one remote BS, or both an aggressor BS and a victim BS.

Abstract: The described techniques may allow transmitting devices to adjust transmission parameters (e.g., transmit power, modulation and coding scheme (MCS)), until reaching an optimal power and/or MCS. These techniques may allow devices to use power efficiently and reduce inter-device interference in a vehicle-to-everything sidelink system. For example, a transmitting device may begin transmissions to a receiving device with initial transmission parameters, which may be configured using a transmission priority and a channel busy ratio. The transmitting device may lower power and/or increase MCS in each of its subsequent transmissions of the same priority, until the receiving device transmits a feedback message that indicates a low signal quality or a failure to decode a previous transmission. The transmitting device may then increase its transmit power and/or decrease its MCS to an acceptable level for a specified time duration based on receiving the feedback message.

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to techniques for mitigating inter-cell interference for uplink ultra-reliable low latency communications (URLLC).

Abstract: Systems, methods, and computer-readable media for providing smart notifications during voice call transitions from hold status to active status are described. An example method can include establishing a call between an endpoint and a remote device; after a determination that the call was placed on hold by the remote device, monitoring, by the endpoint, the call for an indication of a call resume transition, the indication of the call resume transition including at least one of a particular keyword transmitted by the remote device, an active speaker at the remote device, and a dual-tone multi-frequency signaling (DTMF) input from the remote device; detecting, by the endpoint, the indication of the call resume transition; and in response to detecting the indication of the call resume transition, generating, by the endpoint, a notification indicating that the hold has ended and the call has resumed.

Abstract: Methods, systems, and devices are described for wireless communication. A transmitter may receive feedback that a station failed to decode a packet sent over a first channel, and the transmitter may determine to re-send the packet or to send parity bits over the first channel or over a second channel to assist in decoding the failed packet. The first channel may be in an unlicensed radio frequency spectrum, and the second channel may be in a licensed radio frequency spectrum and may have a higher reliability level compared to the first channel. The transmitter may determine a first channel degradation level, which may be based on a signal-to-noise ratio received from the station, and may determine an amount of parity bits to send based on the degradation. The transmitter may determine the reliability level of each channel, which may be based on a channel quality indicator.

Abstract: A method of wireless communication includes receiving a signal from an base station. The method also includes determining a timing advance loop from a set of timing advance loops, and/or a power control loop from a set of power control loops. The determination is based on the received signal.

Abstract: Methods, systems, and devices for wireless communication are described. A plurality of Ethernet devices may transmit Ethernet frames through a cellular network. The Ethernet devices may be coupled to the cellular network via a cellular node. The cellular node may receiver Ethernet frames from the Ethernet devices, identify a traffic class to the Ethernet frames, and map the Ethernet frames to bearers based at least in part on the traffic classes. The cellular node may transmit the Ethernet frames to other cellular nodes using the bearers. At a core network, a mapping between the cellular node and the MAC addresses of the associated Ethernet devices may be stored to allow Ethernet frames to be routed through the cellular network.

Abstract: Aspects of the disclosure relate to determining a transmission configuration indication (TCI) state for receiving a multi-transmission point (TRP) communication. A receiving device receives a configuration message indicating a lowest control resource set identifier (CORESET ID) for receiving one or more downlink control information (DCI) and determines whether a state of the receiving device is within a scheduling threshold duration for decoding DCI. The receiving device then determines a TCI state for receiving data based on a TCI state associated with the lowest CORESET ID if the state of the receiving device is within the scheduling threshold duration, wherein the TCI state associated with the lowest CORESET ID indicates one or more sets of quasi co-location (QCL) parameters. The receiving device then receives the data from one or more transmission points (TRPs) based on the one or more sets of QCL parameters.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a millimeter wave repeater may communicate with a base station using a first set of antennas and a first beamforming configuration for the first set of antennas, the first beamforming configuration being selected from a beamforming codebook that includes multiple beamforming configurations; and communicate with one or more user equipments (UEs) using a second set of antennas and a second beamforming configuration for the second set of antennas, the second beamforming configuration being a fixed configuration that does not change for different communications between the second set of antennas and the one or more UEs. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. An antenna structure for wideband coverage may include a first bowtie antenna disposed in a first plane. The first bowtie antenna may be, for example, an elliptical bowtie antenna or a triangular bowtie antenna. The antenna structure may also include a plurality of additional bowtie antennas, each of the plurality of additional bowtie antennas disposed in a different plane parallel to the first plane. The first bowtie antenna and the plurality of additional bowtie antennas may be stacked in a first direction perpendicular to the first plane to form a bowtie antenna stack. The antenna structure may include a plurality of bowtie antenna stacks. The antenna structure may also include a staggered conductive wall.

Abstract: An image capture device obtains first image data from a front facing camera on a front face of the device including a display. The first image data represents a subject within a field of view of the image capture device. Facial recognition is performed in response to the first image data from the front facing camera. The front image data is used for determining whether any subject is a priority subject, of whom at least one priority subject image-indicative data is accessible by the image capture device. A region of interest is selected, corresponding to the subject determined to be a priority subject. Automatic focus, automatic exposure, or automatic white balance is performed using the selected region of interest. Second image data from the front facing camera are captured based on the automatic focus, automatic exposure, or automatic white balance using the selected region of interest.

Abstract: Systems, methods, and non-transitory media are provided for power-efficient image stabilization. An example method can include collecting measurements from a motion sensor, the measurements being based on movement of an image sensor while capturing frames; calculating parameters for counteracting motions in a frame, wherein first parameters are based on the measurements and second parameters are based on some of the measurements; adjusting, in a first stabilization pass of a dual-pass stabilization process, the first frame according to the second parameters; adjusting, in a second stabilization pass of the dual-pass stabilization process, the first frame according to the first parameters; based on a second frame having less motion than the first frame, enabling for the second frame a single-pass stabilization process for both a frame preview process and video record process; and adjusting, in the single stabilization pass, the second frame according to parameters for counteracting motions in the second frame.

Abstract: Methods and apparatus for selection of radio access technology (RAT) based on device usage patterns are provided. A User Equipment (UE) obtains information relating to one or more Quality of Service (QoS) metrics for communication of data by the UE. The UE designates a Radio Access Technology (RAT) from a plurality of available RATs as a preferred RAT for the communication, based on the obtained information.