QUANTIZATION FOR ARTIFICIAL INTELLIGENCE BASED CSI FEEDBACK COMPRESSION

    公开(公告)号:US20240283611A1

    公开(公告)日:2024-08-22

    申请号:US18425568

    申请日:2024-01-29

    Applicant: Apple Inc.

    CPC classification number: H04L5/0053 H04W72/21

    Abstract: Systems, methods, and circuitries are provided for quantizing artificial intelligence (AI)-based compressed channel state information (CSI) feedback. In one example, a method includes receiving a set of encoder outputs from an AI-based encoder that generates compressed CSI feedback. The method includes optimizing a per-segment vector quantization (VQ) codebook for use in quantizing respective segments of encoder outputs based on the set of encoder outputs. A number of inputs of the VQ codebook and a number of outputs of the VQ codebook are based on a number of bits configured for uplink channel information (UCI) and a number of segments.

    HARQ codebook determination in wireless communications

    公开(公告)号:US12068859B2

    公开(公告)日:2024-08-20

    申请号:US17593333

    申请日:2020-10-15

    Applicant: Apple Inc.

    CPC classification number: H04L1/1812 H04L5/001 H04W72/23

    Abstract: A user equipment (UE) and a network agree on the use of a hybrid automatic repeat request (HARQ) codebook. The UE receives a plurality of downlink control information (DCI) transmissions during a corresponding plurality of physical downlink control channel (PDCCH) monitoring occasions from the base station, wherein each DCI transmission schedules multiple physical downlink shared channel (PDSCH) transmissions on a corresponding one of a plurality of component carriers (CCs), receives a time domain resource allocation (TDRA) table configuration from the base station, determines a maximum number of PDSCH transmissions per CC based on the TDRA table configuration, groups the plurality of CCs together and determines a hybrid automatic repeat request (HARQ)-acknowledgement (ACK) codebook size based on a number of the multiple PDSCH transmissions, the maximum number of PDSCH transmissions, and a resulting ACK or negative acknowledgement (NACK) for each of the multiple PDSCH transmissions.

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