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    Powered Device
    1.
    发明申请
    Powered Device 审中-公开

    公开(公告)号：US20190372475A1

    公开(公告)日：2019-12-05

    申请号：US16425528

    申请日：2019-05-29

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jincan Cao ,  Xuefeng Tang

    IPC: H02M7/217 ,  H01R24/64 ,  H01R13/66 ,  H04L12/10

    Abstract: In a powered device (PD), four MOSFETs are used in a rectifier circuit. The four MOSFETs are disposed based on a premise that an electric potential of a contact pair 1-2 is lower than that of a contact pair 3-6 and an electric potential of a contact pair 7-8 is lower than that of a contact pair 4-5, so that a PoE current of each contact group passes through only two of the MOSFETs but does not pass through a diode.

    Network-based power supply system
    2.
    发明授权
    Network-based power supply system 有权

    公开(公告)号：US12113632B2

    公开(公告)日：2024-10-08

    申请号：US18180219

    申请日：2023-03-08

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Weiping Song ,  Shiyong Fu ,  Yajie Cai ,  Xuefeng Tang ,  Houcun Zhu

    IPC: G06F1/26 ,  H04L12/10 ,  H04L12/40 ,  H04L12/28

    CPC classification number: H04L12/10 ,  H04L12/40045 ,  H04L2012/2845

    Abstract: This application relates to a power consumption grading method for a network-based power supply system. The method includes: when it is detected that power overload protection is not triggered, starting a plurality of power modules of a powered device one by one in a specific order until all the plurality of power modules are started or it is detected that the power overload protection is triggered after a specific power module is started; when it is detected that the power overload protection is triggered, selecting, according to the specific order and based on the specific power module, one or more of the plurality of power modules as a power module combination of the powered device; and determining a load power of the powered device and a corresponding power consumption level based on the power module combination.

    Monitoring performance of optical network using low-power gaps and a pilot tone
    3.
    发明授权
    Monitoring performance of optical network using low-power gaps and a pilot tone 有权

    公开(公告)号：US10938484B2

    公开(公告)日：2021-03-02

    申请号：US16586392

    申请日：2019-09-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang

    IPC: H04B10/08 ,  H04B10/61 ,  H04J14/02 ,  H04B10/079

    Abstract: The disclosed systems, structures, and methods are directed to monitoring performance of optical networks. Transmitted and received optical channel signal has both low-power gaps and an amplitude modulation pilot tone applied. The low-power gaps are applied at a gap frequency with gap power being lower than a signal power of the optical channel signal. The pilot tone is applied to the optical channel signal at a pilot tone modulation frequency, which is different from the gap frequency. Described methods include determining pilot tone modulation depth based on detected gap power in low-power gaps of the received optical channel signal. Amplifier spontaneous emission and nonlinear noise in optical link are detected separately. This permits determining and monitoring of optical signal-to-noise ratio.

    SYSTEMS AND METHODS FOR OPTICAL SIGNAL-TO-NOISE RATIO MONITORING
    4.
    发明申请
    SYSTEMS AND METHODS FOR OPTICAL SIGNAL-TO-NOISE RATIO MONITORING 审中-公开

    公开(公告)号：US20190036600A1

    公开(公告)日：2019-01-31

    申请号：US15665351

    申请日：2017-07-31

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang

    IPC: H04B10/079

    Abstract: A system for monitoring optical signal-to-noise ratio (OSNR) is provided. In some specific examples, the system may use a pilot tone power of a signal modulated with pilot tone to derive the pure signal power and the variance of the whole electric field to derive the total power (pure signal power plus amplified spontaneous emission (ASE) power of the signal). The ASE power can be obtained by subtracting the pure signal power from the total power (ASE+pure signal). Once the ASE power and the pure signal power are known, the OSNR can be calculated.

    Method and apparatus for laser frequency control
    5.
    发明授权
    Method and apparatus for laser frequency control 有权

    公开(公告)号：US11050487B2

    公开(公告)日：2021-06-29

    申请号：US16927245

    申请日：2020-07-13

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang ,  Haitao Sun

    IPC: H04B10/079 ,  H04B10/572 ,  H04J14/02 ,  H04B10/50

    Abstract: The disclosed systems, apparatuses and methods are directed to controlling a difference between a first center frequency of a first optical subcarrier and a second center frequency of a second optical subcarrier of an optical super-channel signal in an optical network. The method comprises modulating the first optical subcarrier at a first optical side component frequency with a first side modulation frequency and modulating the second optical subcarrier at a second optical side component frequency with a second side modulation frequency. The method further comprises detecting a radio-frequency (RF) power at a modulated beat frequency tone in the modified optical signal.

    Systems and methods for optical signal-to-noise ratio monitoring
    8.
    发明授权
    Systems and methods for optical signal-to-noise ratio monitoring 有权

    公开(公告)号：US10256901B2

    公开(公告)日：2019-04-09

    申请号：US15665351

    申请日：2017-07-31

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang

    IPC: H04B17/00 ,  H04B10/079

    Abstract: A system for monitoring optical signal-to-noise ratio (OSNR) is provided. In some specific examples, the system may use a pilot tone power of a signal modulated with pilot tone to derive the pure signal power and the variance of the whole electric field to derive the total power (pure signal power plus amplified spontaneous emission (ASE) power of the signal). The ASE power can be obtained by subtracting the pure signal power from the total power (ASE+pure signal). Once the ASE power and the pure signal power are known, the OSNR can be calculated.

    Transmitter and receiver for mirror crosstalk evaluation and methods therefor
    10.
    发明授权
    Transmitter and receiver for mirror crosstalk evaluation and methods therefor 有权

    公开(公告)号：US11528050B1

    公开(公告)日：2022-12-13

    申请号：US17518928

    申请日：2021-11-04

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Zhiping Jiang ,  Xuefeng Tang ,  Junho Chang

    IPC: H04B1/44 ,  H04B1/10 ,  H04B1/04 ,  H04B1/54 ,  H04B1/16

    Abstract: The disclosed systems and methods for detecting mirror crosstalk between frequency bands equally above and below the center frequency of a Digital Subcarrier Multiplexing system include: a transmitter configured to insert zero-power symbols on half the frequency bands below center frequency, and insert other zero-power symbols, partially overlapping in time with the first zero-power symbols, on the other half of the frequency bands above center frequency. A receiver zeroes out ASE and other noises during the overlapping portion of all the zero-power symbols, then uses the power detected during the remaining portion of each zero-power symbol in each frequency band to accurately evaluate the mirror crosstalk from the corresponding frequency band on the opposite side of center frequency.

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