公开(公告)号：US10466768B2

公开(公告)日：2019-11-05

申请号：US15581977

申请日：2017-04-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shiyong Fu ,  Yan Zhuang ,  Rui Hua ,  Jianguang Yang ,  Xueqi Chen ,  Haifei Wang

IPC: G06F1/32 ,  G06F1/3287 ,  H04L12/10 ,  G06F1/26 ,  H04L12/40 ,  G06F1/3209 ,  G06F1/3296

Abstract: A power sourcing equipment (PSE) chip, and a Power over Ethernet (PoE) device and method are provided, which can determine a status that a peer end is connected to a powered device (PD) when four cable pairs are used to supply power. The PSE chip includes a channel controller, a first channel detector, and a second channel detector. The channel controller sends detection voltages along a first and a second groups of cable pairs in an Ethernet twisted pair; determines a first impedance and a second impedance according to the detection voltages and corresponding currents that are detected; and determines that a first group or a second group of cable pairs is connected to a valid PD according to the impedances and a preset range.

公开(公告)号：US20230344437A1

公开(公告)日：2023-10-26

申请号：US18343120

申请日：2023-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haifei Wang ,  Yan Zhuang ,  Wan Zhou

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: A sampling assembly and a sampling method are provided. A self-calibration unit controls a first switch to be turned on, to enable a first sampling signal to be input to a sampling unit. The sampling unit processes the first sampling signal to obtain a second sampling signal, and outputs the second sampling signal to the self-calibration unit. The self-calibration unit controls the first switch to be turned off, controls a second switch to be turned on, and outputs a first calibration signal to the sampling unit. The sampling unit processes the first calibration signal to obtain a second calibration signal, and outputs the second calibration signal to the self-calibration unit. The self-calibration unit determines an error signal based on the first calibration signal and the second calibration signal. The self-calibration unit obtains a calibrated third sampling signal based on the second sampling signal and the error signal.

公开(公告)号：US20210119813A1

公开(公告)日：2021-04-22

申请号：US17138219

申请日：2020-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haifei Wang

IPC: H04L12/10

Abstract: A control method includes entering, by a powered device, a first status, controlling, by the powered device, at least one of a plurality of first loads in the powered device to be in a connected state, and controlling, by the powered device, a second load in the powered device to be in a disconnected state.

公开(公告)号：US12267083B2

公开(公告)日：2025-04-01

申请号：US18343120

申请日：2023-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haifei Wang ,  Yan Zhuang ,  Wan Zhou

IPC: H03M1/10 ,  G01R15/04 ,  G01R19/00 ,  H03M1/06

Abstract: A sampling assembly and a sampling method are provided. A self-calibration unit controls a first switch to be turned on, to enable a first sampling signal to be input to a sampling unit. The sampling unit processes the first sampling signal to obtain a second sampling signal, and outputs the second sampling signal to the self-calibration unit. The self-calibration unit controls the first switch to be turned off, controls a second switch to be turned on, and outputs a first calibration signal to the sampling unit. The sampling unit processes the first calibration signal to obtain a second calibration signal, and outputs the second calibration signal to the self-calibration unit. The self-calibration unit determines an error signal based on the first calibration signal and the second calibration signal. The self-calibration unit obtains a calibrated third sampling signal based on the second sampling signal and the error signal.

公开(公告)号：US11528154B2

公开(公告)日：2022-12-13

申请号：US17138219

申请日：2020-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haifei Wang

IPC: H04L12/10

Abstract: A control method includes entering, by a powered device, a first status, controlling, by the powered device, at least one of a plurality of first loads in the powered device to be in a connected state, and controlling, by the powered device, a second load in the powered device to be in a disconnected state.

公开(公告)号：US20170235358A1

公开(公告)日：2017-08-17

申请号：US15581977

申请日：2017-04-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shiyong Fu ,  Yan Zhuang ,  Rui Hua ,  Jianguang Yang ,  Xueqi Chen ,  Haifei Wang

IPC: G06F1/32 ,  H04L12/10

CPC classification number: G06F1/3287 ,  G06F1/266 ,  G06F1/3209 ,  G06F1/3296 ,  H04L12/10 ,  H04L12/40045 ,  H04L12/40182 ,  Y02D50/30

Abstract: A power sourcing equipment (PSE) chip, and a Power over Ethernet (PoE) device and method are provided, which can determine a status that a peer end is connected to a powered device (PD) when four cable pairs are used to supply power. The PSE chip includes a channel controller, a first channel detector, and a second channel detector. The channel controller sends detection voltages along a first and a second groups of cable pairs in an Ethernet twisted pair; determines a first impedance and a second impedance according to the detection voltages and corresponding currents that are detected; and determines that a first group or a second group of cable pairs is connected to a valid PD according to the impedances and a preset range.