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    System and Method for Communications Beam Recovery
    12.
    发明申请
    System and Method for Communications Beam Recovery 审中-公开

    公开(公告)号：US20180287860A1

    公开(公告)日：2018-10-04

    申请号：US15890887

    申请日：2018-02-07

    Applicant: Futurewei Technologies, Inc.

    Inventor： Pengfei Xia ,  Bin Liu

    IPC: H04L12/24 ,  H04L5/00 ,  H04W74/08 ,  H04W16/28 ,  H04W72/04

    Abstract: A method for operating a user equipment includes monitoring a first set of reference signals of a first reference signal type transmitted by an access node, each reference signal in the first set of reference signals having a quasi-co-located (QCLed) or spatially similar relationship with a different subset of reference signals of a second set of reference signals of a second reference signal type, identifying a second reference signal from the second set of reference signals as a candidate beam, identifying a first reference signal of the first set of reference signals that is QCLed or spatially similar with the second reference signal, and transmitting a preamble sequence on a random access channel resource that is associated with the first reference signal of the first set of reference signals, thereby identifying the candidate beam for communications at the access node.

    UE-Assisted SRS Resource Allocation
    13.
    发明申请
    UE-Assisted SRS Resource Allocation 审中-公开

    公开(公告)号：US20180227094A1

    公开(公告)日：2018-08-09

    申请号：US15717531

    申请日：2017-09-27

    Applicant: Futurewei Technologies, Inc.

    Inventor： Bin Liu ,  Pengfei Xia

    IPC: H04L5/00 ,  H04W72/04

    Abstract: A dynamic UE capability message specifying a number of beams to be evaluated within different groups of UE TX beam directions associated with different antenna arrays of a UE may be communicated to a transmit receive point (TRP). Each group of UE TX beam directions may include beam directions that are candidates for uplink data transmission. Based on information in the dynamic UE capability message, the TRP can assign SRS resources (for uplink beam management or uplink channel sounding) and/or schedule a multi-layer MIMO uplink transmission in accordance with a UE capability constraint. This may ensure that the SRS resources assignment and/or scheduled multi-layer MIMO uplink transmission is consistent with the UE's beamforming capabilities.

    Beam Management Techniques for Beam Calibration
    17.
    发明申请
    Beam Management Techniques for Beam Calibration 有权

    公开(公告)号：US20220352940A1

    公开(公告)日：2022-11-03

    申请号：US17663573

    申请日：2022-05-16

    Applicant: Futurewei Technologies, Inc.

    Inventor： Pengfei Xia ,  Bin Liu

    IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W16/28 ,  H04B7/08

    Abstract: Embodiments of this disclosure provide techniques for determining a device's beam correspondence status. As used herein, a device is considered to have “beam correspondence” when the device's TX and RX antennas satisfy a calibration criteria. In one example, a device's TX and RX antennas satisfy the calibration criteria when a difference between quality parameters corresponding to reference signals transmitted and received using corresponding TX and RX beams is less than a threshold. In another example, a device's TX and RX antennas satisfy the calibration criteria when a list of indices ranking the device's TX beams matches a list of indices ranking the device's RX beams. The lists of indices may be derived by transmitting and receiving references signals according to the devices RX and TX beams, and then generating list of indices based on quality parameters of the respective RX and TX beams.

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