Abstract: Wireless communications systems and methods related to improving detectability of interference management signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first reservation signal indicating a reservation for a first transmission slot in a spectrum accessed by a plurality of network operating entities. The first wireless communication device and the second wireless communication device are associated with a first network operating entity of a plurality of network operating entities. The first reservation signal includes a duration based on a power class associated with the first network operating entity. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in the first transmission slot.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify that the UE is configured to use a two-step random access channel (RACH) procedure. The two-step RACH procedure may include an uplink request message and a downlink response. The UE may transmit the uplink request message as part of the two-step RACH procedure, and the uplink request message may include a preamble portion that is one of a set of predefined sequences and a payload portion that includes a physical uplink shared channel waveform. The UE may receive the downlink response as part of the two-step RACH procedure and in response to the uplink request message.

Abstract: Techniques are described for wireless communication. A first method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an interlace of a component carrier of an unlicensed radio frequency spectrum band. The interlace includes a plurality of non-contiguous concurrent resource blocks in the unlicensed radio frequency spectrum band, and at least two resource blocks in the interlace include different portions of the uplink control information. A second method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an uplink control channel of an unlicensed radio frequency spectrum band. Resources of the uplink control channel are divided into a plurality of discrete dimensions and the uplink control information of the wireless device is transmitted over a number of the discrete dimensions allocated to the uplink control information of the wireless device.

Abstract: Wireless communications systems and methods related to serving user equipment devices (UEs) using multi-transmission/reception point (TRP) techniques with dynamic varying TRP clusters are provided. A wireless communication device receives, from a first group of one or more TRPs, a first signal during a first time period. The wireless communication device receives, from a second group of one or more TRPs, a second signal during a second time period, wherein at least one TRP in the second group is not in the first group. The first signal may include a first transport block (TB) and the second signal may include a second TB different from the first TB. Alternatively, the first signal may include a first portion of a TB and the second signal includes a second portion of the TB different from the first portion.

Abstract: Wireless communications systems and methods related to automatic frequency coordination (AFC) for spectrum sharing among multiple network operating entities are provided. A first wireless communication device transmits, to a spectrum access coordination entity, a spectrum access request. The first wireless communication device receives, from the spectrum access coordination entity in response to the spectrum access request, a configuration including at least a medium access protocol parameter for performing a medium access procedure in a spectrum shared by a plurality of network operating entities.

Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may measure, across multiple sub-frames received over an unlicensed spectrum, received cell-specific reference signals (CRS) from a cell to obtain CRS measurements. The wireless device may identify one or both of a first subset of the CRS measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the CRS measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may compute one or both of a first signal to interference plus noise ratio (SINR) value for the first subset of the CRS measurements and a second SINR value for the second subset of the CRS measurements. The wireless device may monitor a radio link condition of the wireless device based at least in part on the first SINR value or the second SINR value.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may determine that a communication is to be transmitted on a shared spectrum during a channel access interval not reserved for the communication. The transmitter device may determine, based at least in part on determining that the communication is to be transmitted, that a detection power of a listen-before-talk (LBT) operation satisfies a threshold. The transmitter device may transmit, after a coordinated rate control region and based at least in part on the detection power of the LBT operation satisfying the threshold, a reservation request signal associated with the communication. The transmitter device may transmit the communication before an end of the channel access interval based at least in part on a response to the reservation request signal. Numerous other aspects are provided.

Abstract: Autonomous uplink (AUL) for wideband new radio (NR) unlicensed (NR-U) operations is disclosed. For user equipments (UEs) that have been configured for AUL transmissions and have received an activation signal to activate the AUL capabilities, further indications may be used to enable AUL transmissions on AUL transmission opportunities (TxOPs) that overlap the timing of a current TxOP reserved by a serving base station, but that are allocated outside of the resources reserved for the current TxOP. A UE that identifies a desired, next AUL TxOP that overlaps the current base station-initiated TxOP duration, but is allocated for resources outside of the current TxOP resources determines whether it has obtained an enablement indication either directly from the serving base station or implicitly, based on current conditions at the UE. When the UE determines that it has obtained an enabling indication, it may then perform AUL transmissions via the overlapping AUL TxOP.

Abstract: Techniques are described for wireless communication. A first method may include inserting, in a first transmission using a first radio access technology (RAT), a channel occupancy identifier for a second transmission using a second RAT. The first method may also include transmitting the first transmission having the channel occupancy identifier over an unlicensed radio frequency spectrum band. A second method may include receiving, at a receiver operated using a first RAT, a channel occupancy identifier for a transmission using a second RAT. The channel occupancy identifier may be received over an unlicensed radio frequency spectrum band. The second method may also include decoding the channel occupancy identifier to identify a backoff period, and refraining from accessing the unlicensed radio frequency spectrum band using the first RAT based at least in part on the identified backoff period.

Abstract: New radio (NR) unlicensed (NR-U) operations are discussed with channel occupancy time (COT) multiple downlink-uplink switching opportunities supported by an active channel indication. A network node that initiates a COT for transmissions may identify a within-channel occupancy time (COT) scheduled downlink-uplink switching configuration. After beginning transmissions on the COT, the node receives an active channel indication from one or more additional network nodes. In response to the active channel indication, the node may then perform communications with the node from which the active channel indication is received according to the within-COT scheduled downlink-uplink switching configuration for the current COT on a shared communication channel.

Abstract: A periodic quiet interval is provided for base stations attempting to access a shared transmission medium in NR-U. The base station activates a quiet interval at a periodic interval and transmits on the medium based on the quiet interval. The base station may reduce a Tx power, not transmit, and/or may increase a minimum value of a contention window for BEB during the quiet interval. The base station may receive a request from a second base station to activate the quiet interval, and may determine if a Tx power of the base station is larger than the maximum Tx power of the second base station. The base station may also receive the request as relayed through a UE. The quiet interval can thus ameliorate a starvation effect of BEB in NR-U by allowing base stations with smaller Tx power greater opportunity to control the medium while maintaining BEB in NR-U.

Abstract: Methods, systems, and devices are described for hierarchical communications and low latency support within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing. In some examples symbols of different duration may be multiplexed such that they different symbol durations coexist.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE determines CSI. The UE determines whether to send the CSI based on at least one of a timer or a threshold. The UE sends the CSI upon determining to send the CSI. The UE may send the CSI in a MAC header upon determining to send the CSI. When the UE determines whether to send the CSI based on the threshold, the UE may determine whether to send the CSI based on a difference between the CSI and reference CSI. The UE may determine the reference CSI based on at least one of previously reported CSI, fixed CSI, or an MCS of a received data transmission from a base station. The UE may send CSI to the base station in an initial connection setup with the base station.

Abstract: Techniques for transmitting and receiving wireless communications over an unlicensed radio frequency spectrum band are disclosed, including techniques for transmitting and receiving system information blocks over the unlicensed radio frequency spectrum band, techniques for gaining access to the unlicensed radio frequency spectrum band by performing extended clear channel assessments (ECCAs), techniques for transmitting and receiving synchronization signals and reference signals over the unlicensed radio frequency spectrum band, techniques for identifying starting times of downlink transmissions over the unlicensed radio frequency spectrum band, techniques for transmitting and receiving clear channel assessment (CCA)-exempt transmissions over the unlicensed radio frequency spectrum band, techniques for performing random access over the unlicensed radio frequency spectrum band, and techniques for dynamically modifying a transmission mode over the unlicensed radio frequency spectrum band.

Abstract: Various aspects described herein relate to receiving a first communication over a first set of resources based on a first transmission time interval (TTI), receiving a second communication over a second set of resources based on a second TTI, where the second TTI is smaller than the first TTI, and where the second set of resources overlap the first set of resources defining a common set of resources, and determining whether to prioritize decoding of the first communication over the second communication.

Abstract: Techniques are described for conveying identification information in a preamble transmission. A transmission burst may be generated for transmission over a wireless medium. The transmission burst may include the preamble and a body portion. The preamble may include identification information associated with at least one of a transmitting device or a category of data bring transmitted. The transmission burst may then be transmitted over the wireless medium.

Abstract: Protection of transmission and reception of clear channel assessment (CCA)-exempt transmission (CET) is disclosed in which channel reserving signals or protection signals may be transmitted by the transmitter or receiver of the CET. The transmitted signals may be received by the neighboring access points that could potentially cause interference with the reception of the CET.

Abstract: Systems and methods for uplink transmission scheduling are disclosed. A wireless device may monitor at least two downlink sub-frames for scheduling grants. The wireless device may receive a first uplink scheduling grant in one of the at least two downlink sub-frames for at least a first uplink sub-frame and receive a second uplink scheduling grant in another of the at least two downlink sub-frames for at least the first uplink sub-frame. The wireless device may perform an uplink transmission in the first uplink sub-frame based on one or both of the first uplink scheduling grant and the second uplink scheduling grant. For the uplink transmission, the wireless device may select a most recent uplink scheduling grant or select an uplink scheduling grant received in a downlink sub-frame at least a minimum number of sub-frames before the first uplink sub-frame.

Abstract: Methods, systems, and devices are described for hierarchical communications and low latency support within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing. In some examples symbols of different duration may be multiplexed such that they different symbol durations coexist.

Abstract: Certain aspects of the present disclosure provide techniques that may be used to help enable low latency communications between a user equipment (UE) and a base station (BS) using quick uplink channels that enable a reduced transmission time interval (TTI). An example method generally includes identifying a plurality of slots in a subframe, receiving a resource configuration for an uplink channel, wherein the resource configuration is associated with a first slot of the plurality of slots, determining a resource for transmitting the uplink channel in a second slot of the plurality of slots, wherein the resource is determined based on the resource configuration associated with the first slot of the plurality of slots, and transmitting the uplink channel in the second slot using the determined resource.