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    CODING AND DECODING METHOD AND DEVICE, AND SYSTEM
    1.
    发明申请
    CODING AND DECODING METHOD AND DEVICE, AND SYSTEM 有权
    编码和解码方法与装置及系统

    公开(公告)号：US20160013811A1

    公开(公告)日：2016-01-14

    申请号：US14864338

    申请日：2015-09-24

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiaoshu SI ,  Dao PAN ,  Fanglin SUN ,  Xiaofeng ZHANG ,  Tao OUYANG

    IPC: H03M13/17 ,  H03M13/35

    CPC classification number: H03M13/17 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/23 ,  H03M13/2957 ,  H03M13/35 ,  H03M13/353 ,  H03M13/611 ,  H03M13/618 ,  H03M13/6516 ,  H04L1/0041 ,  H04L1/0046 ,  H04L1/0075

    Abstract: Embodiments of the present disclosure provide an FEC coding and decoding method and device, and a system. A transmit end determines a forward error correction FEC coding type according to a length of to-be-coded data in burst data, and performs coding according to the determined FEC coding type. A receive end determines a forward error correction FEC decoding type according to a length of to-be-decoded data in burst data, and performs decoding according to the determined FEC decoding type. The FEC coding and decoding method provided in the embodiments of the present disclosure improves utilization of a communication resource is improved, and saves a communication resource.

    Abstract translation: 本公开的实施例提供了FEC编码和解码方法和装置以及系统。 发送端根据突发数据中的待编码数据的长度确定前向纠错FEC编码类型，并根据确定的FEC编码类型进行编码。 接收端根据突发数据中待解码数据的长度确定前向纠错FEC解码类型，并根据确定的FEC解码类型进行解码。 本公开的实施例中提供的FEC编码和解码方法提高了通信资源的利用率，并节省了通信资源。

    Channel Parameter Estimation Method And Related Apparatus
    2.
    发明申请
    Channel Parameter Estimation Method And Related Apparatus 审中-公开

    公开(公告)号：US20190222448A1

    公开(公告)日：2019-07-18

    申请号：US16365922

    申请日：2019-03-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Fan WANG ,  Tao OUYANG ,  Li ZHANG ,  Xiaolong ZHANG

    IPC: H04L27/26 ,  H04L12/28 ,  H04L5/00

    Abstract: The present disclosure provides example channel parameter estimation methods and related apparatuses. In one example method, a cable modem (CM) obtains a second data frame through a downlink channel between the CM and a cable modem termination system (CMTS). The second data frame is generated after a first data frame sent by the CMTS is modulated through the downlink channel, a zero-bit-loaded symbol of the first data frame includes no valid codeword, but includes a zero-bit-loaded NCP and an idle codeword identified by the zero-bit-loaded NCP, and the idle codeword includes a data sequence used for channel parameter estimation. The CM can estimate a channel parameter of the downlink channel based on a data sequence in an obtained zero-bit-loaded symbol of the second data frame and the data sequence in the zero-bit-loaded symbol of the first data frame.

    COMMUNICATION METHOD, CABLE MODEM TERMINAL SYSTEM, AND CABLE MODEM
    4.
    发明申请
    COMMUNICATION METHOD, CABLE MODEM TERMINAL SYSTEM, AND CABLE MODEM 审中-公开

    公开(公告)号：US20190123856A1

    公开(公告)日：2019-04-25

    申请号：US16229769

    申请日：2018-12-21

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Tao OUYANG ,  Xiaolong ZHANG ,  Fan WANG

    IPC: H04L1/00 ,  H04L25/02 ,  H04L1/20 ,  H04L5/14

    Abstract: The present disclosures describes a communication method, a CMTS, and a CM. The communication method includes: sending, by a CMTS, a reference signal within a first time period by using a valid subcarrier in a first spectrum, where the first time period is a time period within which none of CMs connected to the CMTS sends a signal in the first spectrum; performing, by the CMTS based on an interfering signal received by the CMTS within the first time period, channel interference estimation on a channel that is used during signal reception of the CMTS and that occupies the first spectrum, where the interfering signal is a signal obtained after the reference signal passes through the channel; and canceling, by the CMTS based on a result of the channel interference estimation, interference from a first signal received by the CMTS to a second signal received by the CMTS.

    METHOD AND APPARATUS FOR CANCELING INTERFERENCE
    6.
    发明申请
    METHOD AND APPARATUS FOR CANCELING INTERFERENCE 有权

    公开(公告)号：US20170279488A1

    公开(公告)日：2017-09-28

    申请号：US15618795

    申请日：2017-06-09

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Fan WANG ,  Xiaoshu SI ,  Tao OUYANG ,  Xiaolong ZHANG

    IPC: H04B3/10 ,  H04L25/03

    CPC classification number: H04B3/10 ,  H04L25/03885

    Abstract: Provided are a method and an apparatus for canceling interference, to resolve a problem that performance of interference cancellation is poor because accuracy of equalizer coefficients obtained by a CMTS through calculation is not sufficiently high. A specific solution is as follows: (101) A CMTS calculates L equalizer coefficients of an L-tap filter according to a preamble sequence by using an adaptive algorithm, and performs adaptive equalization on a received signal by using the L equalizer coefficients, where L is a positive integer greater than 24; and (102) the CMTS selects K equalizer coefficients from the L equalizer coefficients, and sends a ranging response message carrying the K equalizer coefficients to a cable modem CM, so that the CM performs pre-equalization on a to-be-sent signal according to the received K equalizer coefficients, where K is a positive integer less than or equal to L.

    CM, HFC NETWORK FAULT LOCATING SYSTEM, AND FAULT DETECTION METHOD
    7.
    发明申请
    CM, HFC NETWORK FAULT LOCATING SYSTEM, AND FAULT DETECTION METHOD 审中-公开

    公开(公告)号：US20190123818A1

    公开(公告)日：2019-04-25

    申请号：US16230100

    申请日：2018-12-21

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiaolong ZHANG ,  Tao OUYANG ,  Li ZHANG

    IPC: H04B10/079 ,  H04B10/2507

    Abstract: A cable modem (CM), a hybrid fiber coaxial (HFC) network fault locating system, and a fault detection method are provided. The CM can not only detect intrusion noise outside a carrier and white noise, but also detect other fault problems, such as non-linear distortion, pulse noise, intrusion noise on a carrier, and linear distortion. The system includes a direction-selective apparatus. The apparatus can allow only an upstream signal entered from an output port of the apparatus to be transmitted to a CM to which a branch port of the apparatus is connected, without allowing an upstream signal entered from an input port of the apparatus to be transmitted to the CM to which the branch port of the apparatus is connected, so that once detecting a fault from the upstream signal, the CM can accurately determine, through locating, that the fault in an HFC network is located on an output port side of the apparatus.

    METHOD AND APPARATUS FOR DETERMINING TIME OFFSET
    8.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING TIME OFFSET 审中-公开

    公开(公告)号：US20190007254A1

    公开(公告)日：2019-01-03

    申请号：US16038163

    申请日：2018-07-17

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Tao OUYANG ,  Syed Habib RAHMAN ,  Xiaoshu SI ,  Fan WANG ,  Hao LEI

    IPC: H04L27/26

    Abstract: A method and an apparatus for determining a time offset are disclosed. The method includes: obtaining, by a device at a head end, a time-domain signal based on a received signal; and then determining a time offset based on values of peak-to-average ratios of a preset quantity of symbols starting from a qth symbol in the time-domain signal, where a peak-to-average ratio of the qth symbol is greater than a preset threshold. A new method for determining a time offset is provided, and takes advantages that the time-domain signal obtained by the device at the head end has stronger capabilities of resisting interference such as frequency offset and phase noise. The method for determining a time offset can be applied both to initial ranging and periodic ranging.

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