Systems and methods for uplink codebook based transmission

    公开(公告)号:US12170565B2

    公开(公告)日:2024-12-17

    申请号:US18474857

    申请日:2023-09-26

    Applicant: APPLE INC.

    Abstract: Precoders are provided for multi-panel uplink (UL) transmission. A codebook may support asymmetric multi-panel UL transmission or super UL transmission where new radio (NR) and long-term evolution (LTE) transmissions may be provided through different antenna panels of a user equipment (UE). Sounding reference signal (SRS) enhancement provides support for multi-panel transmission. The UE transmits an indication of a UE capability based on an antenna structure comprising multiple antenna panels of the UE. Further, the UE determines, at the UE, one or more precoders to use for UL transmissions based at least in part on the UE capability, wherein the one or more precoders include a polarization co-phasing factor, an antenna panel co-phasing factor, and a combining weight for antennas for a same polarization. Additionally, the UE transmits, from the multiple antenna panels, the UL transmissions using the one or more precoders.

    Device and Method of Configurable Synchronization Signal and Channel Design

    公开(公告)号:US20240414039A1

    公开(公告)日:2024-12-12

    申请号:US18804461

    申请日:2024-08-14

    Applicant: Apple Inc.

    Abstract: Devices and methods of using xSS are generally disclosed. A UE receives an xPSS with (Nrep) symbols each with a subcarrier spacing of K x a PSS subcarrier spacing and a duration of a PSS symbol/K. PSD subcarriers surround the xPSS and the ZC sequence is punctured to avoid transmission on a DC subcarrier. Guard subcarriers separate the xPSS and PSD when the ZC sequence is less than the occupied BW of the xPSS and at least one element in the ZC sequence is punctured for xPSS symbol generation otherwise. One or more xSSSs and xS-SCHs may follow the xPSS. The xSS may be omnidirectional, each having a same xPSS and different xSSS or xS-SCH or a different xPSS and same xSSS or xS-SCH or beamformed, each having different xPSSs and xSSSs or xS-SCHs or a same xPSS and different xSSS or xS-SCH.

    Sidelink Channel Occupancy Time Sharing

    公开(公告)号:US20240381395A1

    公开(公告)日:2024-11-14

    申请号:US18659155

    申请日:2024-05-09

    Applicant: Apple Inc.

    Abstract: Apparatuses, systems, and methods for sidelink unlicensed band (SL-U) cyclic prefix extension (CPE) starting position as well as identifier (ID) restrictions for channel time occupancy (COT) sharing, including systems, methods, mechanisms for COT sharing for PSFCH multi-channel transmission, CPE starting position determination in SL-U, ID restrictions for SL-U COT sharing, and determination of when to use Type 2A, Type 2B, and/or Type 2C in SL-U COT sharing, e.g., in 5G NR systems and beyond. A UE may initiate channel access in a SL-U via an NR downlink Type A or Type B multi-channel access procedure to perform multi-channel PSFCH transmissions. The UE may secure a COT and when the COT is initiated by PSFCH type 1 channel access, the COT may not be shared with other UEs, the COT may be shared with a corresponding UE, or the COT may be shared with UEs expecting feedback during the COT.

    CODEBOOK SUBSET DESIGN FOR UPLINK DATA TRANSMISSION

    公开(公告)号:US20240380451A1

    公开(公告)日:2024-11-14

    申请号:US18653371

    申请日:2024-05-02

    Applicant: Apple Inc.

    Abstract: A user equipment (UE), a base station, a baseband processor or other network device can determine a codebook subset configuration of a plurality of multiple-input multiple-output (MIMO) layers for antenna ports of a codebook. The codebook subset configuration can include a nested structure based on a codebook configured for a fully-coherent UE, or a codebook configured for a partially-coherent UE. Fully-coherent precoders, a set of partially-coherent precoders or a set of non-coherent precoders can be configured in the codebook subset configuration to reduce a number of precoders from the partially-coherent precoders or the non-coherent precoders.

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