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    RADIO FREQUENCY BEAM MANAGEMENT AND RECOVERY
    11.
    发明申请
    RADIO FREQUENCY BEAM MANAGEMENT AND RECOVERY 审中-公开

    公开(公告)号：US20190053072A1

    公开(公告)日：2019-02-14

    申请号：US16100753

    申请日：2018-08-10

    Applicant: National Instruments Corporation

    Inventor： Nikhil U. Kundargi ,  Achim Nahler ,  James Wesley McCoy

    IPC: H04W16/28 ,  H04B7/0413 ,  H04W72/08 ,  H04L12/26 ,  H04W24/10

    Abstract: A base station (BS)/user equipment (UE) for performing radio frequency beam management and recovery in communication with a UE/BS. The BS/UE includes a processor and a memory that stores first and second thresholds. The processor evaluates a beam quality metric against the first and second thresholds, performs beam switching and/or beam broadening in response to determining the beam quality metric falls below the first threshold, and performs a beam failure recovery procedure in response to determining the beam quality metric falls below the second threshold.

    Efficient beam sweeping at a mobile device receiver
    12.
    发明授权
    Efficient beam sweeping at a mobile device receiver 有权

    公开(公告)号：US11178628B2

    公开(公告)日：2021-11-16

    申请号：US16671101

    申请日：2019-10-31

    Applicant: National Instruments Corporation

    Inventor： Nikhil U. Kundargi ,  Venkata Siva Santosh Ganji ,  Ahsan Aziz ,  James Wesley McCoy

    IPC: H04B7/00 ,  H04W56/00 ,  H04B7/08 ,  H04W72/04 ,  H04L27/26 ,  H04L5/00

    Abstract: A user equipment device (UE) reduces receive beam selection time. An antenna array forms receive beams to receive synchronization signal blocks (SSBs) transmitted by a base station (BS). Each SSB comprises OFDM symbols. Each SSB includes a BS-assigned index. The receive beams are switched in time such that, for each SSB, two or more of the receive beams are used to receive corresponding two or more mutually exclusive sets each having at least one but less than all of the OFDM symbols of the SSB. A processor is programmed to, for each receive beam/SSB index pair, measure a signal quality based on the at least one but less than all of the OFDM symbols of the indexed SSB received by the receive beam of the pair. The processor uses the measured signal qualities to select one of the receive beams to use to receive subsequent communications from the BS.

    EFFICIENT BEAM SWEEPING AT A MOBILE DEVICE RECEIVER
    13.
    发明申请
    EFFICIENT BEAM SWEEPING AT A MOBILE DEVICE RECEIVER 有权

    公开(公告)号：US20210136703A1

    公开(公告)日：2021-05-06

    申请号：US16671101

    申请日：2019-10-31

    Applicant: National Instruments Corporation

    Inventor： Nikhil U. Kundargi ,  Venkata Siva Santosh Ganji ,  Ahsan Aziz ,  James Wesley McCoy

    IPC: H04W56/00 ,  H04B7/08 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04

    Abstract: A user equipment device (UE) reduces receive beam selection time. An antenna array forms receive beams to receive synchronization signal blocks (SSBs) transmitted by a base station (BS). Each SSB comprises OFDM symbols. Each SSB includes a BS-assigned index. The receive beams are switched in time such that, for each SSB, two or more of the receive beams are used to receive corresponding two or more mutually exclusive sets each having at least one but less than all of the OFDM symbols of the SSB. A processor is programmed to, for each receive beam/SSB index pair, measure a signal quality based on the at least one but less than all of the OFDM symbols of the indexed SSB received by the receive beam of the pair. The processor uses the measured signal qualities to select one of the receive beams to use to receive subsequent communications from the BS.

    RADIO FREQUENCY BEAM MANAGEMENT AND FAILURE PRE-EMPTION
    14.
    发明申请
    RADIO FREQUENCY BEAM MANAGEMENT AND FAILURE PRE-EMPTION 审中-公开

    公开(公告)号：US20190052344A1

    公开(公告)日：2019-02-14

    申请号：US16100854

    申请日：2018-08-10

    Applicant: National Instruments Corporation

    Inventor： Nikhil U. Kundargi ,  Achim Nahler ,  James Wesley McCoy

    IPC: H04B7/08 ,  H04B17/382 ,  H04B7/06 ,  H04B17/318

    Abstract: A processor in a UE evaluates a radio frequency beam quality metric against a threshold, switches from a first beam to a second beam in response to determining the metric falls below the threshold, and transmits to a base station (BS) a report that includes beam measurements. The report indicates the UE has performed the switching and that the beam measurements are with respect to the second beam. A processor in a UE/BS associates narrower and broader beams, uses the narrower beam, rather than the broader beam, to transfer user data between the BS and the UE, evaluates a beam quality metric of the narrower beam against the threshold, and switches to using the broader beam, rather than the narrower beam, to transfer user data between the BS and the UE in response to determining the beam quality metric of the narrower beam falls below the threshold.

    CELLULAR SYSTEM UTILIZING BEAM COHERENCE INTERVAL METRIC
    16.
    发明申请
    CELLULAR SYSTEM UTILIZING BEAM COHERENCE INTERVAL METRIC 有权

    公开(公告)号：US20220376764A1

    公开(公告)日：2022-11-24

    申请号：US17741188

    申请日：2022-05-10

    Applicant: National Instruments Corporation

    Inventor： Nikhil U. Kundargi ,  Venkata Siva Santosh Ganji ,  Ahsan Aziz ,  James Wesley McCoy

    IPC: H04B7/06 ,  H04W72/04 ,  H04B17/318 ,  H04W24/10 ,  H04B17/336 ,  H04W80/02 ,  H04W16/28

    Abstract: A user equipment device (UE) determines a beam coherence interval metric, which is a measure of stability of a beam pair over time based on a set of beam coherence intervals measured by the UE. The beam pair comprises a receive beam of the UE and a transmit beam of a base station transmitting to the UE. A beam coherence interval comprises a time duration within which a quality of a signal received on the UE receive beam remains within one of a plurality of signal quality bins. The UE also determines a hysteresis value based on the beam coherence interval metric and uses the hysteresis value to decide to switch from an active receive beam to a different receive beam that has a signal quality higher than the active receive beam by at least the hysteresis value. Alternatively, the base station determines and sends the UE the hysteresis value.

    Channel sounding techniques
    19.
    发明授权
    Channel sounding techniques 有权

    公开(公告)号：US10708086B2

    公开(公告)日：2020-07-07

    申请号：US15409261

    申请日：2017-01-18

    Applicant: NATIONAL INSTRUMENTS CORPORATION

    Inventor： Malik Muhammad Usman Gul ,  Ahsan Aziz ,  James Wesley McCoy

    IPC: H04L25/02 ,  H04W56/00 ,  H04J13/00 ,  H04L25/03

    Abstract: Techniques are disclosed relating to channel sounding. In some embodiments a transmitter transmits a periodic CAZAC sequence beginning at a point in time that corresponds to a timing signal (e.g., a pulse-per-second signal). In some embodiments, a receiver waits to begin processing received sequences for a time interval corresponding to the length of the CAZAC sequence, where the time interval begins at the same time as the timing signal. This may avoid a need for timing synchronization prior to processing, reduce processing and latency in receiver implementations, and may allow determination of a TOA as well as a channel impulse response estimate by correlating a received cyclically-shifted CAZAC sequence with a local version of the transmitted CAZAC sequence.

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