SYSTEMS AND METHODS FOR BEAM FAILURE RECOVERY ENHANCEMENT

    公开(公告)号:US20240063877A1

    公开(公告)日:2024-02-22

    申请号:US17593294

    申请日:2021-06-07

    Applicant: APPLE INC.

    CPC classification number: H04B7/0695 H04B17/328

    Abstract: Systems and methods for beam failure recovery (BFR) are disclosed herein. A user equipment (UE) receives downlink (DL) reference signal(s) on corresponding beam(s) from a base station. The UE performs beam failure detection (BFD) on such beams used for user data to determine whether a beam failure has occurred, and candidate beam detection (CBD) on such beams not used for user data to identify candidate beams for recovering from the beam failure. The BFD and the CBD are based on both uplink (UL) channel performance considerations and DL channel performance considerations, as determined using the DL reference signal(s), such that a beam failure may be determined in the UL, the DL, or both, and a candidate beam may be identified for UL, DL, or both. The UE sends a beam failure recovery request BFRQ with this information to the base station, and the system changes beams accordingly.

    ACKNOWLEDGEMENT SIGNALING FOR MULTI-PUSCH AND MULTI-PDSCH SCHEDULING

    公开(公告)号:US20240040582A1

    公开(公告)日:2024-02-01

    申请号:US17593302

    申请日:2021-05-10

    Applicant: APPLE INC.

    CPC classification number: H04W72/232 H04W72/12 H04L1/1854 H04L1/1887

    Abstract: Systems and methods disclosed herein relate to acknowledgement signaling sent by a user equipment (UE) in response to downlink control information (DCI) received from a base station that schedules the use of multiple physical uplink control channels (multi-PUSCH) or multiple physical downlink control channels (multi-PDSCH). Acknowledgement signaling may inform the base station that DCI scheduling the multi-PUSCH/multi-PDSCH was received (or not), so that the base station may reclaim those scheduled resources in the case that the UE remains unaware of them. Methods for performing this signaling include, e.g., the use of HARQ-ACK codebooks (whether in a semi-static or dynamic manner), and aperiodic sounding reference signals (A-SRS). Embodiments involving such DCI received across multiple component carriers of different serving cells of the UE are contemplated. Acknowledgment signaling according to multi-PUSCH/multi-PDSCH subgroups, monitoring windows, acknowledgment signaling enablement/disablement, and the use of DCI to trigger acknowledgment signaling are also discussed.

    HARQ-ACK Codebook Handling
    14.
    发明公开

    公开(公告)号:US20240023135A1

    公开(公告)日:2024-01-18

    申请号:US18476653

    申请日:2023-09-28

    Applicant: Apple Inc.

    CPC classification number: H04W72/232 H04W72/1273 H04L1/1812

    Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable storage media for hybrid automatic repeat request acknowledgement. (HARQ-ACK) codebook handling. In example embodiments, a method is provided. The method comprises determining, at a terminal device, respective hybrid automatic repeat request (HARQ) feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process; and generating a HARQ-ACK codebook for Physical Downlink Shared Channel (PDSCH) based on the HARQ feedback configurations of the plurality of HARQ processes; and transmitting the HARQ-ACK codebook to a network device.

    Low-Power Wake Up Radio Operation in Wireless Communication

    公开(公告)号:US20240015653A1

    公开(公告)日:2024-01-11

    申请号:US18474451

    申请日:2023-09-26

    Applicant: Apple Inc.

    CPC classification number: H04W52/0229 H04W76/28

    Abstract: A user equipment (UE) is configured to enter a radio resource control (RRC) state with a base station wherein network operations are performed using a main radio (MR), receive a first set of parameters from the base station for wakeup radio (WUR) state operation wherein the UE enables a WUR and powers down the MR to an off or deep sleep state, the first set of parameters including a parameter enabling the WUR state operation and a configuration of WUR reference signaling (WUR-RS), receive a second set of parameters from the base station for WUR setup and a WUR signal (WUR-S) configuration and enter the WUR state from the RRC state, wherein, while in the WUR state, the UE performs uses the WUR including at least one of monitoring for the WUR-S, measuring the WUR-RS, or implementing a WUR discontinuous reception (DRX) cycle for WUR-S and WUR-RS signal monitoring.

    MECHANISMS FOR LAYER 1 (L1) MEASUREMENTS ON NEIGHBOR CELL

    公开(公告)号:US20240015615A1

    公开(公告)日:2024-01-11

    申请号:US17440117

    申请日:2021-03-29

    Applicant: Apple Inc.

    CPC classification number: H04W36/00835 H04W36/0085

    Abstract: Some aspects of this disclosure include apparatuses and methods for implementing mechanisms for performing L1-RSRP (Layer 1 Reference Signal Received Power) measurements and/or L1-SINR (Layer 1 Signal-to-Noise and Interference Ratio) measurements on a neighbor cell. For example, some aspects of this disclosure relate to an electronic device. The electronic device includes a transceiver configured to communicate with a serving cell and a neighbor cell and a processor communicatively coupled to the transceiver. The processor determines a measurement period for a Layer 1 (L1) measurement on the neighbor cell and receives, using the transceiver, a resource from the neighbor cell during the measurement period. The processor further performs the L1 measurement on the neighbor cell using the received resource from the neighbor cell.

    METHODS FOR DCI CONFIGURATIONS AND PROCEDURES WITH MULTI-CELL SCHEDULING DCI

    公开(公告)号:US20230354363A1

    公开(公告)日:2023-11-02

    申请号:US18116168

    申请日:2023-03-01

    Applicant: Apple Inc.

    CPC classification number: H04W72/232 H04W72/12

    Abstract: Described are approaches to multi-cell PUSCH/PDSCH scheduling with a single DCI (downlink control information) in a wireless communication system. In one approach, only one component carrier is configured with the multi-cell scheduling DCIs, with no DCI configured on the other component carriers. In a second approach, all of the component carriers can be configured with the multi-cell scheduling DCIs. In a third option, one component carrier is configured with multi-cell scheduling DCI only, while the other component carriers can be configured with the legacy single-cell scheduling DCIs. In a fourth option, one component carrier is configured with both multi-cell scheduling DCIs and the legacy single-cell scheduling DCIs, while the other component carriers can be configured with the legacy single-cell scheduling DCIs. In the fifth option, all the component carriers can be configured with both multi-cell scheduling DCIs and the legacy single-cell scheduling DCIs. In addition, dropping rules are described for the situations of overbooking, i.e., when the number of PDCCH candidates exceeds the capabilities of the user equipment (UE). Potential dropping rules include following the legacy procedure, and providing higher priority to candidates with user-specific search spaces with multi-cell scheduling DCIs. Also described is the impact on DCI formats to accommodate single-cell and multi-cell scheduling DCIs on the same component carrier. Finally, limits on the number and sizes of the DCIs are described.

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