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.

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.

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

IPC: H04B3/00 ,  H04L25/00 ,  H04L27/26 ,  H04L5/00 ,  H04L12/28

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.

公开(公告)号：US09985683B2

公开(公告)日：2018-05-29

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: H04L25/03 ,  H04B3/10

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.