METHODS FOR PATHLOSS REFERENCE SIGNAL ACTIVATION

    公开(公告)号:US20230362664A1

    公开(公告)日:2023-11-09

    申请号:US17442983

    申请日:2021-01-14

    Applicant: Apple Inc.

    CPC classification number: H04W16/28 H04L5/0051 H04B17/328

    Abstract: Methods and systems to activate beams for beam switching based on measurements of a downlink reference signal that is QCL Type-D with a downlink pathloss reference signal are disclosed. A UE may measure and report to a base station the RSRP of the reference signal that is QCL Type-D with a target downlink pathloss reference signal. Based on the reported RSRP measurements, the base station may activate the target pathloss reference signal to command the UE to update the pathloss measurements of the target pathloss reference signal for uplink power control of a beam corresponding to the target pathloss reference signal. The UE may determine whether the target pathloss reference signal is considered known for uplink power control based on the timing relationship among the reception of the reference signal from the base station, the transmission of the RSRP measurement of the reference signal, and reception of the activation command.

    Network Signaling for Radio Resource Management Enhancement in High Speed Train (HST) Scenarios

    公开(公告)号:US20230189012A1

    公开(公告)日:2023-06-15

    申请号:US17437787

    申请日:2021-04-01

    Applicant: Apple Inc.

    CPC classification number: H04W16/18 H04W4/44

    Abstract: A network may transmit either beam deployment information or beam number information to a user equipment (UE) carried on a train and configured for operation in the millimeter wave band. The deployment information may include deployment related distance parameters or azimuth angle spread parameters. The beam number information may indicate a number of network beams associated with a current cell. The UE may determine a number of UE receive beams based on deployment information or the network-indicated number of network beams. The UE may transmit feedback to the network, indicating the number of UE receive beams. Alternatively, the network may send a configuration message indicating a first number of UE receive beams to the UE, which the UE may treat as an upper bound or lower bound in its determination of a desired number of UE receive beams. The UE may transmit the desired number to the network.

    Improved Secondary Cell Activation Mechanism in the New Radio Unlicensed Spectrum

    公开(公告)号:US20220417990A1

    公开(公告)日:2022-12-29

    申请号:US17437784

    申请日:2021-03-31

    Applicant: Apple Inc.

    Abstract: An apparatus may receive a media access control (MAC) control element (CE) from a base station (BS) indicating a secondary cell (SCell) to be activated in an unlicensed band. The apparatus may initiate a timer with an end value in response to receiving the MAC CE and may further adjust a radio-frequency (RF) chain from a first state to a second state corresponding to the SCell to be activated. The apparatus may determine, based on measurements of one or more synchronization signal blocks (SSBs) transmitted from the BS indicating one or more listen before talk (LBT) failures corresponding to the SCell, one or more failed SSB transmissions corresponding to the SCell. Accordingly, the apparatus may readjust, in response to expiry of the timer, the RF chain from the second state to the first state and receive one or more additional SSBs in the first state.

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