Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may determine an interference status of each beam configuration of a plurality of active beam configurations for a shared radio frequency spectrum band. The wireless device may determine a beam-specific listen-before-talk (LBT) requirement for each beam configuration of the plurality of active beam configurations based at least in part on the determined interference status of each beam configuration. The wireless device may selectively enable an LBT procedure on a per-beam basis according to the determined beam-specific LBT requirement for each beam configuration.

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to a control resource set (coreset) for transmitting physical downlink control channels using a single-carrier waveform in communications systems operating according to new radio (NR) technologies. In an exemplary method, a base station may determine a first control resource set (coreset) of time and frequency resources within a control region of system bandwidth, to transmit a physical downlink control channel (PDCCH) to a user equipment (UE) and transmit the PDCCH to the UE as a single-carrier waveform via the first coreset of time and frequency resources.

Abstract: Wireless communications systems and methods related to coordinating shared radio resources for spectrum sharing are provided. A spectrum resource control unit allocates a first resource for exclusive access by a first network operating entity in a spectrum. The exclusive access is configured for at least one of a network information communication or a feedback communication. The spectrum resource control unit allocates a second resource in the spectrum for shared access by the first network operating entity and a second network operating entity. The shared access is configured for at least a downlink control information communication. The spectrum resource control unit transmits, to the first network operating entity and the second network operating entity, a configuration indicating the first resource allocated for exclusive access by the first network operating entity and the second resource allocated for shared access by the first network operating entity and the second network operating entity.

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for receiving ACK/NACK reporting in unlicensed IoT systems with long transmission durations. In one example, an eNodeB executes an LBT protocol to gain access to a channel of a shared spectrum, receives radio resource management (RRM) measurement reports from an IoT-U, estimates a number of repetitions used to schedule the IoT-U based on the RRM measurement, and configures the maximum number of HARQ processes that can be scheduled in a frame based on the RRM measurements and the estimate of the repetitions.

Abstract: Methods, systems, and devices for wireless communications, and more particularly for facilitating autonomous uplink transmission (AUL) using shared (e.g., in a synchronized manner among one or more operators) radio frequency spectrum are described. In aspects, a method of wireless communication over a shared medium may include determining, by at least one user equipment (UE) served by a base station associated with a first operator, access is obtained to the shared medium for a transmission opportunity (TXOP) by the base station based on autonomous uplink resources in the TXOP allocated to at least one UE served by the base station and/or an indication from the at least one UE of autonomous uplink data, and transmitting the autonomous uplink data from the at least one UE to the base station.

Abstract: Synchronization signal block (SSB) multiplexing and remaining material system information (RMSI) monitoring in new radio unlicensed (NR-U) networks are disclosed. For SSB multiplexing, a user equipment (UE) receives an SSB configuration for a discovery signal detection window having a plurality of communication slots, wherein, based on the SSB configuration, UE identifies random access resource and time and frequency locations to monitor remaining minimum system information (RMSI) configured for each SSB. The UE further receives an SSB transmission indicator that reflects a listen before talk (LBT) result, which it may use with the SSB configuration to map one or more SSB for rate matching in selected slots. The UE can then rate match any data transmissions around the identified SSBs in those identified slots regardless of LBT result. The UE may further leverage the SSB configuration and indication of LBT result to monitor SSB transmissions for control resource set (CORESET) transmissions.

Abstract: A method of wireless communication includes identifying one or more coexistence issues corresponding to a utilized set of communication resources of a User Equipment (UE). The method also includes communicating an indication of the coexistence issue(s) to a serving base station.

Abstract: Wireless communications systems and methods related to initial network access in a network deployed over a downlink unlicensed band paired with one or more UL bands are provided. A first wireless communication device communicates, with a second wireless communication device in a downlink unlicensed band, a first broadcast communication signal during a discovery time period configured based on a network discovery configuration. The first broadcast communication signal includes a configuration for requesting a second broadcast communication signal when there is no second broadcast communication signal detected within the discovery time period. The first wireless communication device communicates, with the second wireless communication device, a request for the second broadcast communication signal based on the configuration.

Abstract: Methods, systems, and devices for wireless communications are described that provide for partitioning two or more dimensions of an uplink transmission, where different partitions in each partitioned dimension can be used to provide different feedback information. A UE may measure one or more downlink transmissions from a base station (e.g., beam measurements in a beam sweep procedure), and select a partition of one of the partitioned dimensions to indicate feedback related to the measured downlink transmissions. The feedback may indicate, for example, a particular beam that may be used for an active beam pair, beam refinement information, or other feedback. The partitioned dimensions may include one or more of time resource, a frequency resource dimension, a root sequence dimension, a cyclic shift dimension, a time-frequency dimension, or any combination thereof.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit downlink control information to a user equipment (UE). The downlink control information may identify a grantless uplink group associated with one or more grantless uplink subframes for the UE. The UE may transmit uplink control information for the one or more grantless uplink subframes associated with the indicated uplink group of the UE. The UE may then transmit grantless uplink data during at least one of the one or more grantless uplink subframes based at least in part on the grantless uplink group associated for the UE and the uplink control information.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a coreset of time and frequency resources within a control region of a coreset bandwidth. In one aspect, the coreset bandwidth may be based on a minimum bandwidth configuration associated with one or more UEs in a set of UEs. The apparatus may also transmit a PDCCH as a single-carrier waveform via the coreset of time and frequency resources. In one aspect, the PDCCH may be transmitted to each UE in the set of UEs using the coreset bandwidth.

Abstract: Wireless communications systems and methods related to scheduling and communicating in a frequency spectrum using interlaced frequency resources are provided. A first wireless communication device communicates, with a second wireless communication device, a first interlace configuration indicating a first set of interlaced frequency resources in a frequency band based on a power spectral density (PSD) parameter. The first wireless communication device communicates, with the second wireless communication device, a first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first allocation including at least some frequency resources from the first set of interlaced frequency resources based on the first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first communication signal based on the first allocation.

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may identify synchronization signals and a set of frequency hopping channels for communications as part of a discovery reference signal (DRS) in an anchor channel. The set of frequency hopping channels may include a sequence to indicate an order for utilizing each hopping channel of the set of hopping channels. In some cases, the hopping sequence may be a pseudo random sequence. Additionally, the hopping sequence may be defined such that a non-repeating hopping sequence or pattern which visits all hopping frequencies before revisiting the same frequency is utilized. As such, each hopping channel may be utilized an equal number of times within a period of time and have an approximately equal occupancy time to the other hopping channels.

Abstract: Wireless communications systems and methods related to communications with narrowband wireless communication devices over a wide frequency band are provided. A first wireless communication device transmits a first configuration indicating a first set of channel monitoring occasions for a first channel and a second set of channel monitoring occasions for a second channel. The first wireless communication device transmits, in the first channel based on at least a listen-before-talk (LBT) in the first channel, a first occupancy indication signal indicating a first transmission opportunity (TXOP) in the first channel. The first wireless communication device transmits, in the first channel based on the first configuration, a second occupancy indication signal associated with the first TXOP in the first channel during a channel monitoring occasion of the first set of channel monitoring occasions within the first TXOP.

Abstract: Methods, systems, and devices for wireless communications are described that provide for selecting a time division duplexing (TDD) frame structure for communicating with a user equipment (UE) via a shared radio frequency spectrum in which a listen before talk (LBT) procedure is performed prior to transmitting. A frame based equipment (FBE) frame starting location for FBE frames is determined where the FBE frame starting location is offset from a starting location of the TDD frame structure and spans successive TDD frames. In some cases, the TDD frame structure may be configured such that the UE does not need to perform an LBT procedure, and thus the LBT process may be transparent to the UE, allowing UEs that are not specially configured to operate using an LBT procedure to use the shared radio frequency spectrum.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain access to a shared radio frequency spectrum band for a transmission opportunity. The UE may perform an autonomous uplink transmission over the shared radio frequency spectrum band during a first portion of the transmission opportunity. The UE may transmit a physical layer scheduling request comprising a transmission size parameter for a second portion of the transmission opportunity. The UE may receive an uplink grant for the second portion of the transmission opportunity based at least in part on the scheduling request. The UE may perform a scheduled uplink transmission over the shared radio frequency spectrum band during the second portion of the transmission opportunity according to the uplink grant.

Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting multiple communication protocol types (e.g., ultra-reliable low-latency communication and enhance mobile broadband communication), a user equipment may implement multiplexing rules for handling overlapping transmissions of different communication protocols. For example, if lower latency data supports multiplexing with higher latency data and a lower latency resource overlaps (either partially or completely) with a higher latency resource, a number of options can be taken to control multiplexing. Similarly, if low latency uplink control information supports multiplexing with a slot-based physical uplink shared channel, and the physical uplink shared channel has its own uplink control information, a number of options can be taken to control multiplexing.

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.