Abstract: This document describes methods, devices, systems, and means for user-equipment-coordination-set (404) control aggregation that facilitates more efficient control-plane signaling in comparison to conventional wireless communication systems. Overhead for control-plane signaling is reduced by communicating reports and control commands for the multiple user equipments (110) in the user-equipment-coordination-set (404) in a single message instead of communicating a single control message for each user equipment (110). Additionally, the user-equipment-coordination-set (404) uses joint-reception and joint-transmission, to increase the reliability of communicating reports and control commands, especially in the case of challenging radio communication conditions between a base station (121) and an individual UE (110) located near the edge of a cell provided by the vase station.

Abstract: Techniques and apparatuses are described for enabling base stations (121, 122) to coordinate for canceling cross-link interference (380). The techniques and apparatuses described herein overcome challenges that a single base station (121) might otherwise face in trying to compensate a reception (131) by the base station (121) for cross-link interference (382) from a transmission (132) by another base station (122). The techniques and apparatuses described herein enable the base stations (121, 122) to form coordination sets to exchange information to enable the base stations (121, 122) to accurately reconstruct cross-link interference (380) and ultimately cancel the cross-link interference (380) to improve link quality.

Abstract: A glenoid implant system includes an anchoring structure and a glenoid liner. The anchoring structure includes a base, a wall, and a ledge. The wall extends from a first surface of the base. The ledge extends generally along at least a portion of a first side of the wall, thereby forming an undercut. The wall has a slot formed in a second opposing side of the wall. The glenoid liner is configured to be removably coupled to the anchoring structure. The glenoid liner has a cap portion, a main body, and a deflectable finger. The main body extends from the cap portion and includes a lip configured to engage the undercut of the anchoring structure. The deflectable finger extends from the cap portion. The deflectable finger has a protrusion configured to engage the slot of the anchoring structure to aid in securing the glenoid liner to the anchoring structure.

Abstract: This document describes techniques and apparatuses for user-equipment coordination set (UECS) beam sweeping. In aspects, a user equipment (UE) receives an indication to coordinate beam sweeping with a UECS. The UE directs each UE in the UECS to perform a beam-training procedure by receiving a set of downlink beam transmissions, and forwards beam report information to a base station. In implementations, the UE receives an indication of one or more beam identities and one or more assigned time slots, and directs at least two UEs in the UECS to use specific beams indicated by the beam identities at specific time slots indicated by the assigned time slots, such as by transmitting a respective beam identity and a respective time slot to each UE of the at least two UEs.

Abstract: This document describes techniques and apparatuses for joint-transmission over an unlicensed frequency band using a user equipment (UE)-coordination set. In aspects, a first UE in a UE-coordination set acts as a coordinating UE. The coordinating UE receives, using a local wireless network connection, uplink data from a second UE in the UE-coordination set. The coordinating UE distributes, using the local wireless network connection, the uplink data to at least a third UE in the UE-coordination set. The coordinating UE receives, from at least one UE in the UE-coordination set, respective results of a clear channel assessment of the unlicensed frequency band. The coordinating UE determines a specified time to begin joint-transmission of the uplink data based on the results and coordinates the joint-transmission by directing the at least one UE to initiate the joint-transmission of the uplink data based on the specified time.

Abstract: This document describes techniques and apparatuses for base station location authentication. In particular, a base-station-location server 264 provides protection against a Global Navigation Satellite System (GNSS) spoofing attack or a cellular-network spoofing attack by auditing processed locations 504 of base stations 120 within a cellular network. The base-station-location server 264 maintains a list of authenticated base stations, generates a security key 321 for a base station 120 that is authenticated, and sends the security key 321 to the base station 120 in an authentication message 522. The authenticated base station 120 uses the security key 321 to generate an encrypted positioning reference signal that protects timing information and/or a location 504 of the base station 120. The encrypted positioning reference signal also enables a user equipment (UE) to determine that the base station 120 is authenticated by the base-station-location server 264.

Abstract: This document describes techniques that enable fast discontinuous reception (DRX) cycle adjustment. Using the described techniques, a user equipment can detect trigger events that indicate the user equipment may be in a state that can be mitigated by a DRX cycle configuration adjustment. In response to the trigger event, the user equipment can generate an instant DRX change request (IDCR). The user equipment can transmit the IDCR to a base station that is providing a current DRX cycle configuration and direct the base station to provide an adjusted DRX cycle configuration that is based at least in part on the IDCR. These techniques allow the user equipment to adjust the DRX cycle configuration when the user equipment is in a radio resource control (RRC)-inactive mode or an RRC-idle mode, which can enable the user equipment to quickly mitigate operating conditions such as low battery capacity.

Abstract: The present disclosure describes methods and apparatuses for forming beams that carry data transmitted from a user device to a base station. In some aspects, a transmission configuration is determined based on a set of beams downlinking the base station to the user device and carrying a set of data. The determined transmission configuration is the applied to a transceiver of the user device, which then transmits another set of data carried by another set beams uplinking the user device to the base station.

Abstract: The present disclosure describes methods and apparatuses for beamforming enhancement via strategic resource utilization. In some aspects, an air interface resource is used for exchanging wireless communications using one or more signal beams. In some implementations, end-user devices are classified into a beamforming state—such as active, idle, or inactive—based on an activity level with a base station. To facilitate antenna beamforming between the base station and an end-user device, opportunities for beamforming training are provided by strategically granting resource units based on one or more resource allocation rules. For example, both control and data information can be allocated together on the same frequencies for each end-user device. Also, an uplink or a downlink grant can be provided that precedes a downlink or an uplink allocation, respectively. In some implementations, the resource allocation rules are applied based on the beamforming state to which an end-user device has been classified.

Abstract: This document describes methods, devices, systems, and means for an active coordination set for shared-spectrum environments. Multiple base stations included in an active coordination set (ACS) that is operating in a shared-spectrum environment perform a listen-before-talk (LBT) operation before a downlink (DL) transmission to a user equipment. Based on an outcome of the LBT operation, the respective base stations determine whether they are free to begin the DL transmission. If the respective base station is not free to begin transmitting, base station performs another LBT operation. When the respective base station determines that it is free to begin the DL transmission, the base station transmits the DL transmission and communicates transmit-timing information (TTI) to other base stations in the ACS or to a master base station of the ACS, which relays the TTI to the other base stations in the ACS.

Abstract: The present disclosure describes systems and methods for a user equipment wirelessly communicating with another user equipment using dual connectivity (DC) with a terrestrial base station and a satellite or high-altitude platform. The described methods and systems include a principal routing manager assessing that different subsets of data, to be transmitted from the user equipment to the other user equipment, can use different, respective qualities of service (QoS) offered through different wireless-communication networks associated with the terrestrial base station and the satellite or high-altitude platform.

Abstract: This document describes techniques and systems that enable a base-station-initiated grant revoke. The techniques and systems allow a base station to generate and send a grant-revocation message (GRM) to a user equipment (UE) to revoke a scheduled uplink (UL) or downlink (DL) grant from the base station. The base station can transmit the GRM to the UE using a variety of techniques. For example, based on a trigger event, the base station may assign a UE identifier, such as a specific radio network temporary identifier (RNTI), to the UE and transmit the GRM to the UE using a revoke-physical-downlink-control-channel (R PDCCH) transmission that is associated with the UE identifier. These techniques allow the base station to revoke a scheduled UL or DL grant, which can enable the UE to quickly address timing-critical resource allocation issues and mitigate the effects of adverse operating conditions.

Abstract: This document describes aspects of multiple active-coordination-set (ACS) aggregation for mobility management. A master base station coordinates aggregation of control-plane and user-plane communications, generated by a first active-coordination-set for a first joint communication between the first ACS and a user equipment, where the first ACS includes the master base station and at least a second base station. The master base station receives, from a second master base station of a second ACS, control-plane information or user-plane data associated with a second joint communication between the second ACS and the UE, the second ACS including the second master base station and at least a third base station. The master base station aggregates the control-plane and user-plane communications with at least a portion of the control-plane information or the user-plane data to coordinate data throughput to the user equipment.

Abstract: To employ beamforming to increase signaling distances, one wireless device trains a beamformer using a signal being received from another wireless device. The trained beamformer can then communicate with the other device via a signal beam until channel conditions change. In example implementations, a base station (BS) reserves an air interface resource unit for beamformer training in conjunction with allocating an air interface resource unit for downlink data. The BS transmits a downlink control channel communication to a user equipment (UE) with a downlink data grant indicative of the allocated resource unit. During the reserved resource unit, the UE transmits an uplink tracking communication, which can include a pilot signal, to the BS for beamform training. The BS then uses the freshly trained beamformer to transmit the downlink data as a downlink data channel communication via a downlink beam during the allocated resource unit.

Abstract: The present disclosure describes systems and methods directed to a user equipment (UE) limited-service mode for wireless communications. For a user equipment (UE) that is wirelessly communicating with a base station, a service-mode manager determines that a thermal, power, or battery condition local to the UE violates a threshold and causes the UE to transmit a message that indicates a request by the UE to enter a UE limited-service mode. The base station allocates a set of resources of the air interface to be used for wireless communications upon the UE entering the UE limited-service mode. The base station then transmits a message to the UE, directing the UE to enter the UE limited-service mode and wirelessly communicate with the base station using the allocated set of resources of the air interface.

Abstract: A computing device is described for performing local interference avoidance, when supporting concurrent voice and data transmissions, and with access to multiple radios. The computing device predicts when coexistence issues will occur from maintaining independent voice and data transmissions using separate radios. To avoid local interference issues, the computing device automatically switches to operating a different combination of radios, making local interference less likely to occur. In some cases, the computing device may consolidate the voice and non-voice data exchanges to occur using a single radio. In some cases, rather than consolidation, the computing device may move the voice or the non-voice data exchange to a different radio as a way to avoid the local interference.

Abstract: This document describes methods, devices, systems, and means for disengaged-mode active coordination set (ACS) management. A user equipment (110) uses an ACS for joint wireless communication between the user equipment (110) and multiple base stations (120) included in the ACS. The user equipment (110) receives a resource configuration for an ACS Disengaged-mode Reference Signal (ADRS). The user equipment (110) transitions to a disengaged mode (424) and receives the ADRS. The user equipment (110) determines that an updated ACS is required, transmits a message or a sounding signal indicating the need for the updated ACS, and in response, receives the updated ACS from a master base station (121).

Abstract: Wireless networks may have thousands of configurable parameters, so manual tuning is infeasible. A self-organizing network (SON) can provide automation. However, automated algorithms are not designed to interact with a wireless network, and network experimentation can jeopardize reliability. To address the former, a SON facilitator of a wireless network management node exposes an API that can translate network configuration information for consumption by a SON enhancer, which may implement an AI algorithm for network tuning. The SON facilitator can also transform output from the SON enhancer into directions for controlling a test scenario, including generating a DL SON message describing the test to a UE. To further increase reliability during the test scenario, the UE can be provisioned with two wireless connections. A first connection is unchanged by the test scenario for stability, and a second connection is used for testing.

Abstract: This document describes techniques and apparatuses for a user equipment (UE)-coordination set for a wireless network. In aspects, a base station specifies a set of UEs to form a UE-coordination set for joint transmission and reception of data intended for a target UE within the UE-coordination set. The base station selects one of the UEs within the UE-coordination set to act as a coordinating UE for the UE-coordination set and transmits a request message that directs the coordinating UE to coordinate the joint transmission and reception of the data intended for the target UE. Then, the base station transmits a downlink signal to each UE within the UE-coordination set. Each UE within the UE-coordination set demodulates and samples the downlink signal and then forwards the samples to the coordinating UE, which combines the samples and processes the combined samples to provide decoded data.

Abstract: The present disclosure describes systems and methods directed to mitigating a local interference condition caused by concurrent transmissions in a multi-radio access technology and multi-connectivity environment. For a user equipment transmitting data in a multi-radio access technology/multi-connectivity environment, an interference manager application directs the user equipment to determine that an interference condition exists local to user equipment.