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A channel matrix management method and device

A technology of channel matrix and management method, which is applied in the field of channel matrix management method and its device, which can solve the problems of performance degradation of crosstalk elimination, inability to update channel matrix in time, and inability to know the situation of users going online and offline in time, so as to solve the problem of performance degradation of crosstalk elimination Effect

Active Publication Date: 2008-06-04
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0041] The present invention provides a channel matrix management method, which is used to solve the problems existing in the prior art that the performance of crosstalk cancellation is degraded due to the inability to know the user's online and offline status and the inability to update the channel matrix in time when the user goes online.

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  • A channel matrix management method and device
  • A channel matrix management method and device
  • A channel matrix management method and device

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Embodiment Construction

[0071] Aiming at the problem of DSL user channel crosstalk, the present invention proposes a simple and effective method for dynamically managing the channel matrix, so as to ensure the crosstalk cancellation performance when the user goes online and offline. The present invention will be described in detail below with reference to the embodiments and accompanying drawings.

[0072] There are two problems when a user goes online or offline: first, how to know the user's online and offline status in time; second, how to update the channel matrix after the user goes online and offline in time, so as to eliminate the crosstalk according to the information of the channel matrix.

[0073] For the first question, that is, how to know the online and offline status of users, in the vectored-DSL technology, since the crosstalk is cancelled by the joint sending and receiving processing of all users at the CO end (Central Office, central office), the CO end All users are managed uniforml...

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Abstract

The invention discloses a method and a device for channel matrix management. The method of the invention comprises the following steps: online and offline information of the user is obtained; when the user logs online, the history record of the user channel information is added to the channel matrix; when the user logs offline, the current channel information of the user is recorded and the channel information of the user from the channel matrix is deleted. The invention can timely update the channel matrix according to the online and offline information of the user and then accurately eliminate channel interference in time according to the channel matrix to prevent interference elimination performance decrease caused by logging online and offline of users.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a channel matrix management method and a device thereof applied to an update process of a digital subscriber line DSL channel matrix. Background technique [0002] xDSL (Universal Digital Subscriber Line) is a high-speed data transmission technology transmitted over Unshielded Twist Pair (UTP). The xDSL uses frequency division multiplexing technology to make xDSL and traditional telephone services (POTS) coexist on the same twisted pair line, where xDSL occupies the high frequency band, POTS occupies the baseband part below 4KHz, POTS signal and xDSL signal pass through the splitter (Splitter) separation. Passband transmission of xDSL uses discrete multi-tone modulation (DMT). A system that provides multiple xDSL access is called a DSL Access Multiplexer (DSLAM), and its system reference model is such as figure 1 shown. [0003] As a transmission channel of telephone twiste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/00H04B3/20H04B3/23H04L25/02
CPCH04Q2213/13209H04Q2213/13039H04Q11/04H04Q2213/13099H04Q2213/13173H04Q2213/13335H04Q2213/1319H04Q2213/13349
Inventor 周军龙国柱卫东方李明陈子欢
Owner HUAWEI TECH CO LTD
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