METHOD AND APPARATUS FOR CSI ENHANCEMENT FOR MULTI-TRP COHERENT JOINT TRANSMISSION

    公开(公告)号:US20240056140A1

    公开(公告)日:2024-02-15

    申请号:US18447388

    申请日:2023-08-10

    Applicant: APPLE INC.

    CPC classification number: H04B7/046

    Abstract: Apparatus and methods are provided for CSI enhancement for multi-TRP coherent joint transmission. A user equipment (UE) receives signals from a plurality of transmission and reception points (TRPs). The UE determines, based on the signals, multiple TRP (multi-TRP) coherent joint transmission (CJT) channel state information (CSI) report information for a codebook based on a spatial basis selection matrix, a combination coefficient matrix, and a frequency basis selection matrix. The spatial basis selection matrix is layer common, polarization common, and TRP independent. The UE reports, to one or more of the plurality of TRPs, the multi-TRP CJT CSI report information.

    SEMI-STATIC HARQ-ACK CODEBOOK FOR MULTI-PDSCH TRANSMISSION

    公开(公告)号:US20240032030A1

    公开(公告)日:2024-01-25

    申请号:US17593406

    申请日:2021-08-05

    Applicant: APPLE INC.

    CPC classification number: H04W72/1273 H04W72/0446 H04W72/232 H04L1/1812

    Abstract: Systems and methods for using hybrid automatic repeat request acknowledgement (HARQ-ACK) codebooks to as part of acknowledgement/negative acknowledgement (ACK/NACK) signaling regarding multiple physical downlink shared channel (PDSCH) transmissions (also termed “multi-PDSCH”) scheduled by a single downlink control information (DCI) corresponding to multiple candidate PDSCH monitoring occasions are discussed herein. Rate matching indicators for one, multiple, or all of the PDSCHs of a scheduled multi-PDSCH are discussed. Effects of invalid symbol signaling, where one or more resources corresponding to a candidate PDSCH monitoring occasion corresponding to the DCI has been indicated for uplink (UL) use or not for DL use by a base station, are discussed. Effects of a bandwidth part change (in UL or downlink (DL)) occurring near or during the DCI, the multi-PDSCH, and a physical uplink control channel (PUCCH) containing the ACK/NACK signaling (e.g., containing or corresponding to all or part of the HARQ-ACK codebook) are discussed.

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