Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for frame based operation and medium contention procedures in wireless networks. In some aspects, devices of a wireless network may perform receiver side contention operations. To illustrate, reference signals from a receiving device may be transmitted to a transmitting device and used by the transmitting device to estimate interference for transmitter side transmissions. Such receiver side reference signals may more accurately reflect the interference profile that transmissions sent by the transmitting device will face, such as when operating in a spectrum shared with many devices. The transmitting device may utilize the beam(s) that satisfy interference criteria when receiving the reference signals to transmit data.

Abstract: Aspects described herein relate to resource block allocation for time domain single-carrier waveform processing in new radio (NR). Specifically, in an aspect, a guard band may be allocated for a single-carrier waveform in a time or frequency domain. In another aspect, a resource block may be allocated for a time domain single-carrier waveform.

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a base station may transmit sets of network coding encoded packets user equipments (UEs), and each set of network coding encoded packets may be associated with a redundancy overhead. The base station may dynamically identify the redundancy overhead for transmitting sets of network coding encoded packets to each UE based on a failure rate associated with a previous transmission of network coding encoded packets to that UE. For example, the base station may determine a failure rate associated with a transmission of a first set of network coding encoded packets and may identify a redundancy overhead associated with one or more second sets of network coding encoded packets based on the determined failure rate. In some cases, the base station may identify different redundancy overheads for transmissions of network coding encoded packets to different UEs.

Abstract: Wireless communications systems and methods related to channel access in a shared radio frequency band in an unlicensed spectrum or a shared spectrum are provided. A wireless communication device determines a channel access procedure based on whether one or more channel access conditions are satisfied for accessing an unlicensed frequency band. The one or more channel access conditions are associated with at least one of sensing across multiple channel occupancy times (COTs), a transmission beam characteristic, a transmit power, a transmission duty cycle, or a beam dwell time. The wireless communication device transmits, based on the channel access procedure, a communication signal in the unlicensed frequency band.

Abstract: Embodiment methods for managing communication between a wireless device and a base station may include a wireless device sending an indication in a random access channel (RACH) message to the base station that the wireless device is capable of millimeter wave (mmWave) digital beamforming. Embodiment methods may include a base station receiving the indication in a random access channel (RACH) message from the wireless device that the wireless device is capable of millimeter wave (mmWave) digital beamforming, generating a first RACH response to the wireless device in response to the indication in the RACH message that the wireless device is capable of mmWave digital beamforming, and multiplexing the first RACH response to the wireless device with a second RACH response transmitted to a second wireless device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station (BS), a channel state information reference signal (CSI-RS) communication; and transmit, to the BS, a physical uplink control channel communication including feedback information that is a response to the CSI-RS communication and including an interference measurement. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a first sidelink communication comprising second buffer status information associated with the second network node. The first network node may transmit, to a third network node, a sidelink buffer status report (BSR) indicative of the second buffer status information and first buffer status information associated with the first network node. Numerous other aspects are described.

Abstract: Wireless communications systems and methods related to providing feedback for DL data are provided. A first wireless communication device communicates with a second wireless communication device, a first communication signal. The first wireless communication device communicates with the second wireless communication device, a grant for retransmitting a feedback associated with the first communication signal. The first wireless communication device communicates with the second wireless communication device, the feedback based on the grant.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a mapping between a set of synchronization signal block resources and a set of operating frequencies within a frequency band. The UE may identify a parameter of a synchronization signal block based on an operating frequency of the set of operating frequencies for conveying the synchronization signal block and a direction of a beam for conveying the synchronization signal block. The parameter may include an index of the synchronization signal block. The UE may monitor for the synchronization signal block based on the identified parameter.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may sense, using a beam sweeping operation during a channel check period, a shared wireless communication channel. The wireless communication device may perform a wireless communication action based at least in part on whether a high priority wireless communication signal is detected during the beam sweeping operation. Numerous other aspects are described.

Abstract: A wireless device uses a frame-based channel access mode to access a wireless spectrum for wireless communication. The wireless device may use transmitter-side only channel sensing to determine whether or not the spectrum is idle. The frame-based channel access mode may use a fixed frame period that includes an initial sensing period for beam-based sensing and an idle period at the end of the frame to facilitate spectrum sharing.

Abstract: A base station (BS) or a user equipment (UE) performs a channel access procedure for a plurality of beams to determine an availability of the plurality of beams. In some implementations, the BS or the UE determines that a channel access procedure is successful for a subset of the plurality of beams. In such implementations, the BS or the UE performs the transmission on the subset of the plurality of beams.

Abstract: The present disclosure relates to apparatus and methods of monitoring a region by a transmitting device within a wireless medium for transmissions using at least one directional beam covering the region. Upon determining that the region in the wireless medium is free of transmissions, the transmitting device transmits to a plurality of wireless devices in the region using a plurality of spatially separated directional beams. Other aspects of the disclosure relate to apparatus and methods for receiving an instruction, e.g., at a user equipment (UE), to perform a channel assessment at a first time. The UE monitors a region within a wireless medium for transmissions after receiving the instruction. Upon determining that the region is free of transmissions, the UE may send an acknowledgment of the received instruction.

Abstract: Certain aspects of the present disclosure provide techniques for reducing inter-sector interference. A method generally includes transmitting, in a multi-user multiple-input and multiple-output (MU-MIMO) mode, first beamformed transmissions using a first beam to a first user equipment (UE) in a first sector and second beamformed transmissions using a second beam to a second UE in a second sector, wherein the BS is configured to control a plurality of sectors comprising the first sector and the second sector, receiving, from the first UE, a feedback report indicating inter-sector interference encountered by the first UE in the first sector due to the second beamformed transmissions, and taking one or more actions based on the feedback report to reduce the inter-sector interference encountered by the first UE in the first sector.

Abstract: Methods, systems, and devices for wireless communication are described. Aspects of the disclosure describe narrow beam-based channel access that enables a device to communicate in a shared radio frequency spectrum band without performing channel access procedures. Specifically, aspects of the disclosure describe techniques for defining one or more directional beams as a narrow beam, where the relative narrowness of the beam may be determined in the context of interference (e.g., as opposed to being defined from a geometric perspective). For example, a particular beam may be determined to be a narrow beam, and therefore associated with communications in shared radio frequency spectrum bands without channel access procedures, based on one or more metrics and a number of spatial streams associated with the beam. A device may use such narrow beams for communications without channel access procedures in shared radio frequency spectrum bands.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for detecting when a control link between a user equipment (UE) and a base station is lost and recovering the control link. In one example, a UE may detect that a control link with a base station is lost based on a timer or counter expiring or based on failing to receive signaling from the base station. In another example, a UE may be configured to transmit uplink transmissions to a base station to maintain a control link with the base station, and the base station may detect that a control link with the UE is lost if the base station fails to receive one or more uplink transmissions from the UE. If the control link is lost, the base station and the UE may communicate to re-establish the control link.

Abstract: Aspects relate to beam management reports that enable selection of best antenna panel and beam combinations for uplink transmissions from a user equipment (UE) when one or more antenna panels of the UE are subject to a maximum permissible exposure (MPE) limit. The UE receives a reference signal at a plurality of antenna panels, wherein the reference signal is received in different beams on each of the plurality of antenna panels. The UE determines N beams providing highest measured strengths of the reference signal on at least one of the plurality of antenna panels, wherein the MPE limit is to be applied to the at least one of the plurality of antenna panels for uplink transmissions. The UE transmits a beam management report including reduced highest measured strengths of the reference signal in the N beams to account for the MPE limit.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a first transmit receive point (TRP), a downlink control information (DCI) communication, the UE being included in a multi-TRP configuration with the first TRP and a second TRP. The UE may determine information unique to the first TRP. The information unique to the first TRP may be at least one of associated with the DCI communication or included in the DCI communication. The UE may generate a downlink scrambling sequence initialization code, associated with the first TRP, based at least in part on the information unique to the first TRP. The UE may generate a downlink scrambling sequence, associated with the first TRP, based at least in part on the downlink scrambling sequence initialization code associated with the first TRP. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of whether an uplink multiple input multiple output (MIMO) communication is to be codebook-based (CB) or non-codebook-based (NCB). The UE may transmit the uplink MIMO communication as CB or NCB based at least in part on the indication. 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 configuration information for a received signal strength indication (RSSI) measurement, the configuration information indicating a transmission configuration indication (TCI) state configuration for the RSSI measurement. The UE may perform the RSSI measurement based at least in part on the TCI state configuration. The UE may transmit a measurement report of the RSSI measurement. Numerous other aspects are described.