A method and device for communication in the digital user line technology

Abstract

The present invention discloses a method for communication in digital user line techniques. Said method comprises the following steps: obtaining communication performances parameters; a first transmit-receiver device and a second transmit-receiver device performing communications by adopting preconcerted communication rules after the communication performances parameters having reached or exceeding preconcerted values, wherein the preconcerted communication rules are respectively set at the first transmit-receiver device and the second transmit-receiver device. The present invention also discloses a transmit-receiver device for communication in digital user line techniques. According to the present invention, bit tables and gains tables are preconcerted in advance and then stored respectively at the first transmit-receiver device and the second transmit-receiver device. When large broad band noises (such as crosstalk) occur, a quick switching between the bit tables and the gains tables determined in advance is available by utilizing simple message or inquiring-replying mechanism. Since exchanging of bit tables and gains tables is not necessary, the technical scheme in accordance with the present invention is characterized in its quick switching velocity and high reliability. Furthermore, the present invention can improve the spectrum efficiency.

Description

technical field [0001] The present invention relates to a communication technology, in particular to a communication method and device in digital subscriber line technology. Background technique [0002] After years of development, ADSL (Asymmetric Digital Subscriber Line) technology has developed from the first generation of ADSL to the current ADSL2 (second generation ADSL), ADSL2+ (ADSL2 with extended downstream bandwidth) and the updated VDSL2 (second generation even High-speed digital subscriber line), the frequency band used by it is gradually increasing, and the corresponding bandwidth is also gradually increasing. ADSL and ADSL2 downlink use spectrum below 1.1MHz to provide a maximum downlink rate of 8Mbps. ADSL2+ extends the downlink bandwidth to 2.2MHz and can provide a maximum downlink rate of 24Mbps. VDSL2 even uses up to 30MHz of spectrum to provide the highest uplink and downlink symmetry. 100Mbit / s access rate. The various digital subscriber line technologie...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method and system for communication in digital subscriber line technology, which can dynamically adapt the transmission rate according to the noise change of the line, improve the performance of anti-noise, so as to avoid the Various problems (such as dropped calls), especially suitable for situations where the noise suddenly increases significantly in a short period of time

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