公开(公告)号：US20220174379A1

公开(公告)日：2022-06-02

申请号：US17548793

申请日：2021-12-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shengmeng FU ,  Yu XIONG ,  Jiangwei MAN ,  Chengyan WANG ,  Xiaofei ZENG ,  Li ZENG

IPC: H04Q11/00 ,  H04B10/69

Abstract: An optical receiver is disclosed, including an optoelectronic detector, a transimpedance amplification (TIA) circuit, a single-ended-to-differential converter, an I/O interface, and a controller. The optoelectronic detector, having bandwidth lower than required system transmission bandwidth, converts an optical signal into a current signal. The TIA circuit compensate gain for the received current signal based on a received control signal, to obtain a voltage signal, where a frequency response value of the current signal within first bandwidth is greater than that within the bandwidth of the optoelectronic detector, and any frequency in the first bandwidth is not lower than an upper cut-off frequency of the optoelectronic detector. The single-ended-to-differential converter converts the voltage signal into a differential voltage signal. The I/O interface outputs the differential voltage signal. The controller generates the control signal based on the differential voltage signal. The optical receiver disclosed can reduce costs while ensuring signal quality.

公开(公告)号：US20220294551A1

公开(公告)日：2022-09-15

申请号：US17827467

申请日：2022-05-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuming WU ,  Shiwei NIE ,  Xiaofei ZENG ,  Dekun LIU ,  Gang ZHENG ,  Jun ZHOU

IPC: H04J14/02 ,  H04L9/40

Abstract: Embodiments of this application provide an upstream resource grant method, a device, a passive optical network, and a computer-readable storage medium. The upstream resource grant method includes: An optical line terminal obtains an upstream grant message on which transformation processing has been performed, where a transformation parameter used for the transformation processing includes a physical identity of an optical network unit (ONU); and the optical line terminal sends the upstream grant message on which the transformation processing has been performed, where the upstream grant message carries an upstream resource grant indication of the optical network unit, and the upstream resource grant indication is used to indicate an upstream resource granted to the optical network unit. The technical solutions provided in the embodiments of this application help reduce an occurrence probability of a rogue ONU phenomenon, and further improve service running stability of a PON system.

公开(公告)号：US20220247507A1

公开(公告)日：2022-08-04

申请号：US17727492

申请日：2022-04-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Enyu ZHOU ,  Lei JING ,  Xiaofei ZENG ,  Huafeng LIN

IPC: H04J14/02

Abstract: This application provides a port detection method, an optical network device, and a passive optical network system, to quickly and accurately detect a port connected to an ONU, and improve efficiency of determining the port connected to the ONU. The method includes: an optical line terminal sends optical signals corresponding to all of N wavelengths to at least one optical network unit, where the N wavelengths are different from each other, and N is a positive integer; the OLT receives optical power values that are of the optical signals corresponding to all of the N wavelengths and that are sent by a first ONU, where the first ONU is any one of the at least one ONU; and the OLT determines, bases on the optical power values of the optical signals corresponding to all of the N wavelengths, information about an optical splitter port corresponding to the first ONU.

公开(公告)号：US20210152901A1

公开(公告)日：2021-05-20

申请号：US16952912

申请日：2020-11-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shengmeng FU ,  Yu XIONG ,  Jiangwei MAN ,  Chengyan WANG ,  Xiaofei ZENG ,  Li ZENG

IPC: H04Q11/00 ,  H04B10/69

Abstract: An optical receiver is disclosed, including an optoelectronic detector, a transimpedance amplification (TIA) circuit, a single-ended-to-differential converter, an I/O interface, and a controller. The optoelectronic detector, having bandwidth lower than required system transmission bandwidth, converts an optical signal into a current signal. The TIA circuit compensate gain for the received current signal based on a received control signal, to obtain a voltage signal, where a frequency response value of the current signal within first bandwidth is greater than that within the bandwidth of the optoelectronic detector, and any frequency in the first bandwidth is not lower than an upper cut-off frequency of the optoelectronic detector. The single-ended-to-differential converter converts the voltage signal into a differential voltage signal. The I/O interface outputs the differential voltage signal. The controller generates the control signal based on the differential voltage signal. The optical receiver disclosed can reduce costs while ensuring signal quality.

公开(公告)号：US20210148786A1

公开(公告)日：2021-05-20

申请号：US17158765

申请日：2021-01-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jingran KANG ,  Huafeng LIN ,  Xiaofei ZENG ,  Yuanmou LI

IPC: G01M11/00 ,  H04B10/071 ,  G01D5/353

Abstract: Optical time domain reflectometers and optical subassemblies haying optical tine domain reflectometry functions are provided. In one aspect, an optical time domain reflectometer includes a base and a light splitting film disposed on the base, and the light splitting film includes a first side corresponding to a transmission region and a second, opposite side corresponding to a reflection region. The optical time domain reflectometer further includes a laser and a detector that are respectively located on the transmission region and the reflection region. The light splitting film is configured to: reflect or transmit laser light emitted by the laser out of the base, and reflect or transmit a part of the laser light reflected or scattered by an optical fiber to the detector.

公开(公告)号：US20190273975A1

公开(公告)日：2019-09-05

申请号：US16418886

申请日：2019-05-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huafeng LIN ,  Jinrong YIN ,  Dianbo ZHAO ,  Xifeng WAN ,  Shiwei NIE ,  Gang ZHENG ,  Zhijing LUO ,  Xiaofei ZENG ,  Jun LUO

IPC: H04Q11/00 ,  H04J14/02

Abstract: The present disclosure relates to passive optical network (PON) systems, optical line terminals (OTLs), and optical network units (ONUs). One example PON system includes an OLT and at least two ONUs. The OLT and the ONUs exchange data on one downstream channel and two upstream channels. The OLT sends downstream data to each ONU on the downstream channel, where the downstream data includes an upstream bandwidth grant used to control each ONU to send upstream data. Each ONU receives the downstream data on the downstream channel, and sends the upstream data on a first upstream channel or a second upstream channel based on the upstream bandwidth grant included in the downstream data. The OLT receives, on the first upstream channel and the second upstream channel, the upstream data sent by each ONU, where a registration function is disabled on the first upstream channel, and enabled on the second upstream channel.