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Very high bit rate digital user line link rate switching method

A technology of digital subscriber line and link rate, applied in the field of data communication, can solve problems such as inconvenient maintenance, and achieve the effect of reducing maintenance work, reducing maintenance cost and convenient application.

Inactive Publication Date: 2008-07-30
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a very high bit rate digital subscriber line link rate switching method for the maintenance problem caused by the fixed rate VDSL link in the prior art to realize automatic VDSL link rate switching. Adjust and adapt to solve the problem of inconvenient maintenance

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Embodiment Construction

[0016] In a preferred embodiment of the present invention, the VDSL link rate is divided into n ranges from small to large according to its usable range, and correspondingly there are n modes.

[0017] Among them, the highest gear, that is, the gear that can reach the maximum rate combination under the current link condition, is the maximum rate mode n; and the base mode is the lowest gear, that is, mode 1, and the mode k is from base mode 1 to One of the modes between the highest mode n.

[0018] In normal operation, the VDSL link is established in the maximum rate mode n; and when the VDSL link is disconnected, its remote modem will set itself to base mode 1. At this time, if the central office of the VDSL link is also set In base mode 1, the VDSL link can be restored from the disconnected state to the established state in base mode 1. The present invention performs rate switching based on this point, and the specific steps are as follows: figure 1 As shown, the specific instruc...

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Abstract

Based on range, VDSL link rate is divided into multi-steps form high to low. In each step, one combination of an upward rate and a downward rate in easiest to build link is selected as a mode. In run time, the link state is detected timely. If broken link state is detected, then the configuration at local end is changed to basic mode. If the link can be built at basic mode, then the highest rate mode is setup for both local and remote end. If the link cannot be built at the highest rate, then building link is returned back to the basic mode, and the mode with lower one step than highest rate is setup for both local and remote end. Descending in turn, till link is built at a mode. The invention detects and switches VDSL link rate automatically so as to raise adaptability and reliability of system, reduce maintenance work and lower maintenance cost.

Description

Technical field [0001] The present invention relates to data communication technology, and more specifically, to a very high bit rate digital subscriber line link rate switching method used in a digital subscriber line access system. Background technique [0002] VDSL (Very high data rate Digital Subscriber Line), also known as very high bit rate digital subscriber line, from a technical point of view, VDSL can be regarded as the next generation of ADSL (Asymmetric Digital Subscriber Line, that is, asymmetric digital subscriber line technology). In a short distance, the rate it provides on a pair of ordinary telephone twisted-pair wires greatly exceeds the rate of ADSL. In addition, compared with Ethernet (LAN) access methods and traditional dial-up access methods, VDSL has unique advantages. [0003] Many of the currently used VDSL access equipment adopt QAM (Quadature Ampli-tude Modulation, that is, quadrature amplitude modulation) debugging method, such as Siemens's 10baseS pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34
Inventor 闫强张小鸥颜晓庆卢存方
Owner ZTE CORP
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