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公开(公告)号：US10122410B2
公开(公告)日：2018-11-06
申请号：US15471955
申请日：2017-03-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Jie Lv
Abstract: A channel transmission characteristic obtaining method and apparatus, where the method includes obtaining transmission characteristic curves of at least two channels in a cable modem in a channel scanning manner, where the at least two channels form one contiguous frequency band, and frequencies corresponding to the transmission characteristic curves of the at least two channels include frequency values on a same order of magnitude, and amplitude values on a same order of magnitude, translating the transmission characteristic curves of the channels in an amplitude direction, to make amplitudes corresponding to same frequencies on all transmission characteristic curves overlapped in order to form one continuous curve, and setting the continuous curve as a transmission characteristic curve of the contiguous frequency band.
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公开(公告)号：US20170201293A1
公开(公告)日：2017-07-13
申请号：US15471955
申请日：2017-03-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Jie Lv
CPC classification number: H04B3/48 , H04B3/06 , H04H20/12 , H04L25/0212 , H04L25/022 , H04L25/0224 , H04N21/6118 , H04N21/6168
Abstract: A channel transmission characteristic obtaining method and apparatus, where the method includes obtaining transmission characteristic curves of at least two channels in a cable modem in a channel scanning manner, where the at least two channels form one contiguous frequency band, and frequencies corresponding to the transmission characteristic curves of the at least two channels include frequency values on a same order of magnitude, and amplitude values on a same order of magnitude, translating the transmission characteristic curves of the channels in an amplitude direction, to make amplitudes corresponding to same frequencies on all transmission characteristic curves overlapped in order to form one continuous curve, and setting the continuous curve as a transmission characteristic curve of the contiguous frequency band.
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公开(公告)号：US10476737B2
公开(公告)日：2019-11-12
申请号：US15971981
申请日：2018-05-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Chenghu Shen
Abstract: Embodiments of the present disclosure disclose a hybrid fiber coaxial (HFC) network fault locating method and apparatus. The method includes: obtaining a fault group in an HFC network; collecting a pre-equalization coefficient of at least one cable modem (CM); enabling a reference fault point that is corresponding to the fault group and whose location is known; collecting the pre-equalization coefficient of the at least one CM again; and determining a relative distance between each fault point in the fault group and the reference fault point according to the pre-equalization coefficient collected twice. In the present disclosure, not only each fault point in a fault group including a plurality of fault points can be located, but also a fault group including only a single fault point can be located.
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公开(公告)号：US10257018B2
公开(公告)日：2019-04-09
申请号：US15429491
申请日：2017-02-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Jie Lv
IPC: H04B3/48 , H04L12/24 , G01R31/08 , G01R23/16 , H04L12/28 , H04B10/079 , H04B10/2575
Abstract: A failure analysis method and device, where the method includes obtaining a frequency domain response amplitude of a channel from a hybrid fiber-coaxial (HFC) network, performing linear fitting on an effective portion of the frequency domain response amplitude to determine a channel slope value, and performing channel failure analysis according to the channel slope value. Failure analysis is performed according to the obtained channel slope value, and the channel slope value is a new failure analysis parameter. In this way, means of channel failure analysis increase, and channel failure analysis is more accurate.
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公开(公告)号：US09992089B2
公开(公告)日：2018-06-05
申请号：US15355203
申请日：2016-11-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Jie Lv , Xiaolong Zhang
IPC: H04B3/00 , H04B3/46 , H04B17/391 , H04L12/26 , H04B10/079 , H04L1/00 , H04L1/20 , H04Q11/00
CPC classification number: H04L43/0847 , H04B3/00 , H04B3/46 , H04B10/0793 , H04B17/391 , H04L1/0036 , H04L1/203 , H04L1/206 , H04Q11/0066 , H04Q2011/0083
Abstract: The present invention discloses a parameter obtaining method and apparatus. In this method, multiple signals are received over a communications link on a network, where each of the received signals is corresponding to a point on a complex plane; decision is performed on each of the received signals; for each of the received signals, an error signal between the received signal and a corresponding decision signal is determined; and a complex-plane distribution feature parameter used to indicate a distribution feature, on the complex plane, of the signals received over the communications link is determined according to all the determined error signals. In this method, an inaccurate maintenance result in manual analysis of a constellation diagram is avoided.
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Patent Agency Ranking
公开(公告)号：US20170155541A1
公开(公告)日：2017-06-01
申请号：US15429491
申请日：2017-02-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Jie Lv
CPC classification number: H04L41/0631 , G01R23/16 , G01R31/08 , G01R31/088 , H04B3/48 , H04B10/079 , H04B10/25751 , H04L12/2801 , H04L41/0677
Abstract: A failure analysis method and device, where the method includes obtaining a frequency domain response amplitude of a channel from a hybrid fiber-coaxial (HFC) network, performing linear fitting on an effective portion of the frequency domain response amplitude to determine a channel slope value, and performing channel failure analysis according to the channel slope value. Failure analysis is performed according to the obtained channel slope value, and the channel slope value is a new failure analysis parameter. In this way, means of channel failure analysis increase, and channel failure analysis is more accurate.
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公开(公告)号：US10938509B2
公开(公告)日：2021-03-02
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 , H04B3/32 , H04B10/079 , H04L5/00 , H04B3/23 , H04L5/14 , H04B17/345 , H04B3/487 , H04L1/20 , H04L25/02 , H04B1/56
Abstract: The communication method includes: sending, by a CMTS (cable modem terminals stem), 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 (cable modems) 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.
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8.发明授权公开(公告)号：US10797901B2
公开(公告)日：2020-10-06
申请号：US16263621
申请日：2019-01-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang , Tao Ouyang , Fan Wang
IPC: H04N7/173 , H04L12/28 , H04B3/487 , H04B3/32 , H04L5/14 , H04B17/336 , H04N21/61 , H04W72/04 , H04B1/525
Abstract: The present invention provides a power adjustment method, a network management system, a CMTS, and a CM. The power adjustment method includes: obtaining, by a network management system, a first SNRCM between two CMs connected to a CMTS, where the first SNRCM represents a signal ratio of a signal sent by the CMTS to a first CM and received by the first CM to a signal sent by a second CM to the CMTS and received by the first CM; and sending, by the network management system, indication information to the CMTS based on the first SNRCM, and a first relationship between an SNRCM and a transmit power at which the CMTS sends a signal to the CM.
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公开(公告)号：US20200162605A1
公开(公告)日：2020-05-21
申请号：US16748516
申请日：2020-01-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong Zhang
Abstract: A method includes: determining a length of a trunk cable based on a first time domain characteristic of an echo channel of a cable modem termination system CMTS; determining, based on a second time domain characteristic of an echo channel of each cable modem CM, a length of a drop cable connected to the trunk cable; determining a connection relationship between each CM and the trunk cable based on a signal to interference plus noise ratio SINR between any two of the CMs; and determining a topology of a network based on the length of the trunk cable, the length of the drop cable, and the connection relationship between each CM and the trunk cable.
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公开(公告)号：US10567203B2
公开(公告)日：2020-02-18
申请号：US16365922
申请日：2019-03-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Fan Wang , Tao Ouyang , Li Zhang , Xiaolong Zhang
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.
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