Method, device and system for quickly initializing vectoring DSL (Digital Subscriber Line)

Abstract

The invention discloses a method, a device and a system for quickly initializing a vectoring DSL (Digital Subscriber Line). At channel discovery and real-time training stages, a vectoring control device sends an error reporting instruction to a user terminal in a vectoring group with a predetermined synchronization frame period T, and whether a truncation error value reported by the user terminal is received in a predetermined time range is judged; if the truncation error value reported by the user terminal is not received in the predetermined time range, historical successful data are extracted from a memory; the historical successful data are used for corresponding vectoring calculation to obtain a corresponding a crosstalk coupling coefficient precoding value; and the obtained crosstalk coupling coefficient precoding value is issued to a precoder for coding processing. Through using a mode of combining real-time FEXT (Far End Cross-Talk) Far end crosstalk estimation and port historical crosstalk data, the current crosstalk coupling coefficient is calculated, a vectoring calculation convergence threshold is quickly achieved, and the time of initially activating the vectoring DSL can be shortened significantly.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for fast initialization of vectorized DSL. Background technique [0002] In the application of DSL (Digital Subscriber Line, Digital Subscriber Line) access technology based on ordinary twisted-pair copper cables, crosstalk interference is an important reason affecting the speed increase, especially FEXT (FarEndCross-Talk, far-end crosstalk). Vectoring (Vectoring) technology can eliminate the FEXT interference of copper cable lines by jointly processing the uplink and downlink signals of each line pair in the vectoring group, improve the transmission performance of each line pair, and achieve a rate close to crosstalk. It is FTTX The key technology and better solution to implement the integrated speed-up of light-copper in the process of light-in and copper-out. [0003] figure 1 It is a flow chart of vectorized DSL initialization in the prior art (taking V...

AI Technical Summary

Problems solved by technology

[0008] Because the vectoring equipment needs to coordinate the channel crosstalk collection between multiple line pairs in the vectoring group and calculate the interception error at the same time, and only conducts the vectoring group training information exchange at the synchronization frame position, the initialization activation time is greatly increased compared with ordinary DSL. (more than 3 times), especially when the scale of the vectoring group is large (such as a system-level vectoring device with more than 50 lines), the application will significantly affect the start-up and activation time of the user terminal, reducing the user's perception of use and easily causing complaint

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