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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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20170070409A1
公开(公告)日：2017-03-09
申请号：US15355203
申请日：2016-11-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Jie LV , Xiaolong ZHANG
IPC: H04L12/26 , H04L1/20 , H04L1/00 , H04Q11/00 , H04B10/079
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.
Abstract translation: 本发明公开了一种参数获取方法和装置。 在该方法中，通过网络上的通信链路接收多个信号，其中每个接收信号对应于复平面上的点; 对每个接收到的信号执行判定; 对于每个接收到的信号，确定接收信号和对应的判定信号之间的误差信号; 并且根据所有确定的误差信号来确定用于指示通过通信链路接收的信号在复平面上的分布特征的复平面分布特征参数。 在该方法中，避免了对星座图的手动分析的不准确的维护结果。
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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
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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5.发明申请公开(公告)号：US20190165965A1
公开(公告)日：2019-05-30
申请号：US16263621
申请日：2019-01-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaolong ZHANG , Tao OUYANG , Fan WANG
IPC: H04L12/28 , H04N21/61 , H04W72/04 , H04B17/336
CPC classification number: H04L12/2801 , H04B1/525 , H04B3/32 , H04B3/487 , H04B17/336 , H04L5/14 , H04N21/6118 , H04N21/6168 , H04W72/0473
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：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
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.
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