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 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 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 of operation by a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system, the method comprising:
obtaining error samples from remote terminals connected to lines in a vectored group of DSL lines; calculating an estimate of channel coefficients that have changed due to a disorderly event, based on the error samples; and updating a precoder based on the estimated channel coefficients.