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    UE REFERENCE TIMING FOR CFRA ON SERVING CELL
    2.
    发明申请
    UE REFERENCE TIMING FOR CFRA ON SERVING CELL 审中-公开

    公开(公告)号：WO2023283939A1

    公开(公告)日：2023-01-19

    申请号：PCT/CN2021/106815

    申请日：2021-07-16

    Applicant: APPLE INC.

    Inventor： CUI, Jie ,  ZHANG, Dawei ,  HE, Hong ,  YAN, Hongbo ,  NIU, Huaning ,  RAGHAVAN, Manasa ,  LI, Qiming ,  CUI, Shengshan ,  CHEN, Xiang ,  TANG, Yang

    IPC: H04W72/04 ,  H04W72/08 ,  H04L5/00 ,  H04W74/08

    Abstract: Systems and methods for determining a timing of a random access channel (RACH) occasion (RO) used to transmit a contention free random access (CFRA) preamble triggered by the receipt of an physical downlink control channel (PDCCH) order in a PDCCH are disclosed herein. A user equipment (UE) receives the PDCCH order and determines a timing offset value between the RO and a signal (e.g., a synchronization signal block (SSB), the PDCCH, a reference signal, etc. ) to be used as a timing source. The UE also determines the arrival time of the signal to be used at the timing source. The UE then determines a time of the RO (during which the CFRA preamble will be transmitted) according to the arrival time and the timing offset value. Timing advance (TA) value (s) may also be accounted for as part of such a determination.

    UE REFERENCE TIMING FOR CFRA ON SERVING CELL
    9.
    发明公开
    UE REFERENCE TIMING FOR CFRA ON SERVING CELL 审中-公开

    公开(公告)号：EP4294109A2

    公开(公告)日：2023-12-20

    申请号：EP23207256.1

    申请日：2021-07-16

    Applicant: Apple Inc.

    Inventor： CUI, Jie ,  ZHANG, Dawei ,  HE, Hong ,  YAN, Hongbo ,  NIU, Huaning ,  RAGHAVAN, Manasa ,  LI, Qiming ,  CUI, Shengshan ,  CHEN, Xiang ,  TANG, Yang

    IPC: H04W74/08

    Abstract: Systems and methods for determining a timing of a random access channel (RACH) occasion (RO) used to transmit a contention free random access (CFRA) preamble triggered by the receipt of an physical downlink control channel (PDCCH) order in a PDCCH are disclosed herein. A user equipment (UE) receives the PDCCH order and determines a timing offset value between the RO and a signal (e.g., a synchronization signal block (SSB), the PDCCH, a reference signal indicated in an active transmission configuration indicator (TCI), etc.) to be used as a timing source. The UE also determines the arrival time of the signal to be used at the timing source. The UE then determines a time of the RO (during which the CFRA preamble will be transmitted) according to the arrival time and the timing offset value. Timing advance (TA) value(s) may also be accounted for as part of such a determination.

    FREQUENCY OFFSET DELTA TRACKING FOR NR CONNECTED MODE DISCONTINUOUS RECEPTION CARRIER AGGREGATION
    10.
    发明公开
    FREQUENCY OFFSET DELTA TRACKING FOR NR CONNECTED MODE DISCONTINUOUS RECEPTION CARRIER AGGREGATION 审中-公开

    公开(公告)号：EP4152840A1

    公开(公告)日：2023-03-22

    申请号：EP22195596.6

    申请日：2022-09-14

    Applicant: Apple Inc.

    Inventor： ÖHMANN, David ,  YAN, Hongbo ,  FARAJIDANA, Amir ,  GRADL, Dietmar ,  ALMALFOUH, Sami M. ,  CUI, Shengshan

    IPC: H04W56/00 ,  H04W52/02

    Abstract: Systems and methods are provided for a user equipment (UE) to perform frequency offset (FO) delta tracking. For an anchor component carrier (CC), the UE wakes up to perform tracking updates on a plurality of successive DRX cycles. For the non-anchor CC, the UE determines a minimum update interval Δt upd , and schedules wake-ups on a first subset of the plurality of successive DRX cycles based on the minimum update interval Δt upd . For the first subset of the plurality of successive DRX cycles with scheduled wake-ups, the UE performs the tracking updates on the non-anchor CC and updates an FO delta between the anchor CC and the non-anchor CC. For a second subset of the plurality of successive DRX cycles without the scheduled wake-ups on the non-anchor CC, the UE applies the FO delta to correct for a frequency error.

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