Uplink Timing Synchronization Maintenance in Secondary Cell Group

    公开(公告)号:US20240224201A1

    公开(公告)日:2024-07-04

    申请号:US18435665

    申请日:2024-02-07

    Applicant: Apple Inc.

    CPC classification number: H04W56/0005 H04W24/08 H04W74/0833 H04W76/15

    Abstract: Aspects are presented herein of apparatuses, systems, and methods for secondary cell group (SCG) addition. A wireless device may establish communication with a first base station that is comprised in a master cell group (MCG) and a second base station that is comprised in the SCG. The wireless device may maintain timing advance (TA) parameters for performing uplink communication with the second base station. The wireless device may perform a plurality of signal quality measurements after receiving an indication to deactivate the SCG. The wireless device may determine whether to reuse the TA parameters for communicating with the second base station after receiving an indication. The determination may be based on comparing one or more signal quality measurements of the second base station to one or more signal quality thresholds.

    FR2 UL GAP CONFIGURATION
    103.
    发明公开

    公开(公告)号:US20240215014A1

    公开(公告)日:2024-06-27

    申请号:US17918338

    申请日:2021-10-21

    Applicant: Apple Inc.

    CPC classification number: H04W72/1268 H04W52/34

    Abstract: Apparatuses for FR2 UL gap configuration, and associated configuring methods. In one aspect, a dedicated radio resource control (RRC) signaling is used to configure a UL gap by transmitting. The UL gap configuration may indicate a reference cell to determine a UL gap pattern for a multi-radio dual connectivity (MR-DC) configuration. The UL gap configuration may indicate a system frame number (SFN) and a subframe of the reference cell used for calculating the UL gap pattern. The reference cell can be selected from a list of cells including FR1 cells or can be limited to FR2 cells.

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