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    Frame coding and optical network unit (ONU) synchronization in passive optical networks (PONs)
    22.
    发明授权
    Frame coding and optical network unit (ONU) synchronization in passive optical networks (PONs) 有权

    公开(公告)号：US12149346B2

    公开(公告)日：2024-11-19

    申请号：US17944902

    申请日：2022-09-14

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Andy Shen ,  Xiang Liu ,  Yuanqiu Luo ,  Frank Effenberger

    IPC: H04L1/00

    Abstract: A method is implemented by an ONU in a 50G-PON. The method comprises receiving an encoded DS PHY frame from an OLT, the encoded DS PHY frame comprises an FEC codeword, the FEC codeword comprises an SFC field and a payload, and the SFC field and the payload are encoded with a same FEC; decoding the FEC codeword using the FEC to obtain a decoded SFC field and the payload; performing a first verification of the decoded SFC field while in a sync state of a synchronization state machine; and staying in the sync state when the first verification is successful or exiting the sync state when the first verification is unsuccessful.

    Diffractive deep neural network (D2NN) processing using a single modulation layer
    23.
    发明授权
    Diffractive deep neural network (D2NN) processing using a single modulation layer 有权

    公开(公告)号：US12013599B2

    公开(公告)日：2024-06-18

    申请号：US17587956

    申请日：2022-01-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiang Liu ,  Yongxi Tan ,  Ning Cheng ,  Jin Yang ,  Frank Effenberger

    IPC: G02F1/01 ,  G02B27/42

    CPC classification number: G02F1/0102 ,  G02B27/4277

    Abstract: An apparatus comprises a first mirror; a second mirror; a modulation layer positioned between the first mirror and the second mirror and comprising a plurality of modulation regions; a diffraction layer positioned between the modulation layer and the second mirror, and an input port admitting a light beam into the apparatus. The light beam passes through the diffraction layer and is modulated by the modulation layer to create a first modulated beam before being reflected by the first mirror, the first mirror reflecting the first modulated beam toward the second mirror, the second mirror reflecting the first modulated beam toward the modulation layer to be modulated for at least a second time.

    Signal processing method and apparatus
    26.
    发明授权
    Signal processing method and apparatus 有权

    公开(公告)号：US11368240B2

    公开(公告)日：2022-06-21

    申请号：US17181760

    申请日：2021-02-22

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xu Zhou ,  Xiang Liu ,  Yansi Le ,  Zhiyong Feng

    IPC: H04J14/00 ,  H04J14/02 ,  H04B10/69

    Abstract: A signal processing method and apparatus are provided. The method includes: receiving an optical signal in a target receive channel, and converting the optical signal into an electrical signal; determining, in the converted electrical signal, an electrical signal associated with a non-overlapping frequency band between the target receive channel and another channel, where the another channel is a channel that overlaps the target receive channel; and determining, based on the electrical signal associated with the non-overlapping frequency band, an electrical signal corresponding to a valid received optical signal that does not include an interfering optical signal in the target receive channel. According to the application, the target transmit channel and the another channel are set to channels that overlap each other, thereby reducing bandwidths occupied by the channels. In the method provided in the embodiments of this disclosure, spectrum utilization can be improved, thereby improving a data transmission rate.

    Multiple-rate optical network unit (ONU) activation
    27.
    发明授权
    Multiple-rate optical network unit (ONU) activation 有权

    公开(公告)号：US11356755B2

    公开(公告)日：2022-06-07

    申请号：US16926070

    申请日：2020-07-10

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yuanqiu Luo ,  Bo Gao ,  Frank Effenberger ,  Xiang Liu

    IPC: H04Q11/00

    Abstract: An OLT comprises a processor configured to generate a first message comprising a first field instructing an ONU to report its data rate capability as at least one of 10 Gb/s, 25 Gb/s, or 50 Gb/s; a transmitter coupled to the processor and configured to transmit the first message to the ONU; and a receiver coupled to the processor and configured to receive a second message from the ONU in response to the first message, the second message comprises a second field indicating the data rate capability. A method comprises generating a first message comprising a first field instructing reporting of a data rate capability as at least one of 10 Gb/s, 25 Gb/s, or 50 Gb/s; transmitting the first message; and receiving a second message in response to the first message, the second message comprises a second field indicating the data rate capability.

    Optical communication system
    29.
    发明授权
    Optical communication system 有权

    公开(公告)号：US11075698B2

    公开(公告)日：2021-07-27

    申请号：US16983259

    申请日：2020-08-03

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiang Liu ,  Ning Cheng ,  Frank Effenberger

    IPC: H04B10/04 ,  H04B10/50 ,  H04B10/564 ,  H04B10/572 ,  H04L25/03

    Abstract: The disclosure relates to technology for signal transmission in an optical communication system. An optical transmitter comprises a directly modulated laser (DML) configured to generate a modulated optical signal in response to a modulation signal. The modulated optical signal comprises a first frequency corresponding to a logical one value in the modulation signal and a second frequency corresponding to a logical zero value in the modulation signal. The modulated optical signal has a modulation symbol rate of “R”. The transmitter comprises a controller configured to control the DML to establish a target frequency gap between the first frequency and the second frequency. The transmitter also comprises an optical band pass filter (OBPF) coupled to the DML to receive the modulated optical signal and output a filtered optical signal. The OBPF has a 3-dB bandwidth of less than R.

    COMMUNICATION METHOD AND APPARATUS IN A POINT-TO-MULTIPOINT COMMUNICATION NETWORK
    30.
    发明申请
    COMMUNICATION METHOD AND APPARATUS IN A POINT-TO-MULTIPOINT COMMUNICATION NETWORK 审中-公开

    公开(公告)号：US20200382241A1

    公开(公告)日：2020-12-03

    申请号：US16995995

    申请日：2020-08-18

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiang Liu ,  Huaiyu Zeng ,  Frank Effenberger ,  Yuanqiu Lou ,  Andy Shen

    IPC: H04L1/08 ,  H04L1/00 ,  H04Q11/00 ,  H04J3/16

    Abstract: A communication method and device are provided for communication in a point-to-multi-point communication network. A communication method includes receiving, by a node of a plurality of multi-point nodes, a transmission frame comprising a header including a repetition information and a data section comprising multiple modulation symbols, with at least two repeated modulation symbols that are repeated to represent a first modulation symbol; extracting, by the node, the repetition information of the header; recovering, by node, the amplitude of each modulation symbol of the at least two repeated modulation symbols; and combining, by the node, the amplitudes of the at least two repeated modulation symbols, based on the repetition information, to reconstruct the first modulation symbol represented by the at least two repeated modulation symbols.

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