Uplink timing synchronization maintenance in secondary cell group

    公开(公告)号:US11943722B2

    公开(公告)日:2024-03-26

    申请号:US17439451

    申请日:2021-03-31

    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.

    Channel State Information Reporting
    148.
    发明公开

    公开(公告)号:US20240088969A1

    公开(公告)日:2024-03-14

    申请号:US18502623

    申请日:2023-11-06

    Applicant: Apple Inc.

    Abstract: This disclosure relates to techniques for a wireless device to perform channel state information reporting. The wireless device may receive channel state information reporting configuration information. The channel state information reporting configuration information may include an indication to use a wideband precoding matrix indicator format for 3GPP release 16 type II channel state information reporting. The wireless device may perform channel state information reporting using a different reporting configuration than 3GPP release 16 type II channel state information reporting using a wideband precoding matrix indicator format based at least in part on the channel state information reporting configuration information. The wireless device may also or alternatively perform 3GPP type I channel state information reporting using a unified spatial basis selection framework for rank indicators of 3 and 4 for any number of channel state information reference signal ports.

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