METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE IN DSL SYSTEMS

摘要

An access node of a communication system is configured to control crosstalk between an activating channel associated with a first network terminal of a communication system and active channels associated with respective other network terminals of the system. The access node detects a control signal sent by the first network terminal over the activating channel in a designated phase of an initialization process of the first network terminal, determines an error signal from the detected control signal, correlates the error signal with one or more corresponding signals sent by respective ones of the other network terminals over the active channels, estimates crosstalk from the active channels into the activating channel based on the correlation, and configures a vectoring signal processing module to control the estimated crosstalk. The control signal sent by the first network terminal comprises a value that is selected by the first network terminal from a set of two or more values and prior to its detection the particular selected value is unknown to the access node.