METHOD AND ARRANGEMENT IN A DSL VECTORING SYSTEM

摘要

Method and arrangement in a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system. The method involves a number of actions, to be performed when a disorderly event occurs on a line m in a vectored group of DSL lines, and the transmission on line m is continued. The method comprises obtaining error samples from Customer Premises Equipments, CPEs, connected to other lines in the vectored group of DSL lines. The method further comprises—calculating an estimate of the channel coefficients changed due to the disorderly event, based on the error samples, thus providing a partial channel estimate. Further, the method comprises—modifying a downstream precoder, at least partly based on the partial channel estimate, such that retraining of the other lines in the vectored group due to the disorderly event is avoided.;The arrangement is adapted to enable the performance of the above described method.

主权项

1. A method in a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system, the method comprising:
when a disorderly event occurs on a line m in a vectored group of DSL lines, and the transmission on line m is continued:
obtaining error samples from Customer Premises Equipments, CPEs, connected to other lines in the vectored group of DSL lines,calculating an estimate of the channel coefficients changed due to the disorderly event, based on the error samples, thus providing a partial channel estimate, andmodifying a downstream precoder, at least partly based on the partial channel estimate, such that retraining of the other lines in the vectored group due to the disorderly event is avoided wherein the partial channel estimate comprises the channel coefficients related to the mth line.