Systems and Methods for PDCCH Repetition Reception

    公开(公告)号:US20230171031A1

    公开(公告)日:2023-06-01

    申请号:US17593326

    申请日:2021-01-14

    Applicant: Apple Inc.

    CPC classification number: H04L1/08 H04W72/23

    Abstract: A user equipment (UE) monitors a Physical Downlink Control Channel (PDCCH). The UE receives a configuration for a physical downlink control channel (PDCCH) including repetitions for PDCCH candidates comprising first PDCCH data, wherein the PDCCH candidates are repeated across multiple durations of a DL resource grid, detects, based on a repetition detection scheme, each of the PDCCH candidates and combines soft bits from each of the PDCCH candidates, wherein the combined soft bits are jointly decoded to determine the first PDCCH data and calculates a number of blind decodes (BDs) for the durations of the DL resource grid carrying the PDCCH candidates, wherein at least one BD value for the PDCCH candidates is scaled by a scaling factor for the calculation of the number of BDs.

    SYSTEM AND METHOD FOR HIGH SPEED DOPPLER COMPENSATION IN A CELLULAR ENVIRONMENT

    公开(公告)号:US20230155760A1

    公开(公告)日:2023-05-18

    申请号:US17441962

    申请日:2020-08-05

    Applicant: Apple Inc.

    CPC classification number: H04L5/0048 H04L5/0035 H04B7/01

    Abstract: Methods and apparatuses are disclosed for calculating and compensating for Doppler shift in a high-speed environment. When in a high-speed environment, Doppler shifts on a transmitted radio frequency signal can become extremely large, which may make it difficult or even impossible for a receiving device to accurately decipher the signal. Therefore, embodiments of the present disclosure describe how tracking reference signals can be transmitted from multiple transmission/reception points, and processed by the UE. For example, the TRS transmitted from the TRP can be enhanced to allow for TRS information from two different TRPs. Additionally, or alternatively, a flag can be set within TRS information that identifies it as having originated from either a first TRP or a second TRP. Additionally, the UE can calculate Doppler shift information and report that information back to the base station in a report message, such as an SRS message. In this manner, the base station can precompensate for the Doppler shift.

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