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1. CN104247358 - Probe modulation method, error feedback method, and corresponding device and system

Office
China
Application Number 201380002193.8
Application Date 26.04.2013
Publication Number 104247358
Publication Date 24.12.2014
Grant Number 104247358
Grant Date 17.11.2017
Publication Kind B
IPC
H04L 27/26
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
Applicants 华为技术有限公司
Inventors 王祥
Agents 北京弘权知识产权代理事务所(普通合伙) 11363
北京弘权知识产权代理事务所(普通合伙) 11363
Priority Data PCT/CN2013/073744 03.04.2013 CN
Title
(EN) Probe modulation method, error feedback method, and corresponding device and system
(ZH) 探测调制方法、误差反馈方法及相应设备和系统
Abstract
(EN)
The present invention relates to providing a DSLAM system of multiway xDSL access, and discloses a probe modulation method for eliminating remote end crosstalk of a channel in a DSLAM system, an error feedback method, a crosstalk cancellation coefficient obtaining method, a corresponding network side device, a user side device, a vectorization control entity, and the DSLAM system. The method comprises: calculating, according to a superframe structure parameter and an error feedback parameter of a DSLAM system, the number N of superframes required by an error detected by an uplink feedback on a downlink probe symbol; modulating, according to the calculated N, each probe element of a probe sequence to a downlink probe symbol of M consecutive superframes; and by using a detected error fed back by an uplink symbol occupying a maximum of C consecutive superframes on a downlink probe symbol, enabling error feedbacks orderly follow the probe modulation and fully feeding back an error on a probe symbol corresponding to the whole probe sequence.

(ZH)
本发明涉及提供多路xDSL接入的DSLAM系统,公开了一种用于消除DSLAM系统中的信道的远端串音的探测调制方法、误差反馈方法、串音抵消系数获取方法以及相应的网络侧设备、用户侧设备、矢量化控制实体和DSLAM系统,包括:根据DSLAM系统的超帧结构参数和误差反馈参数计算上行反馈在一个下行探测符号上测量出的误差所需的超帧个数N,基于所计算出的N将探测序列的每个探测元素调制在各连续M个超帧的下行探测符号上,并利用最多占连续C个超帧上行时长的上行符号反馈在一个下行探测符号上测量出的误差,能够使误差反馈有序地跟随探测调制并完整反馈整个探测序列所对应的探测符号上的误差。

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