Patent Document ID: 8537882
Application ID: 13097950
Patent Flag: 1

Claim One:
1. A method for rapidly exiting training, comprising: in a training procedure of a Vectored-Digital Subscriber Line (DSL) filter, comparing a feedback error value of the filter with a preset threshold e th , and determining whether the filter meets a convergence condition according to a comparison result; wherein the convergence condition is met when the feedback error value of the filter is not greater than the preset threshold e th ; and exiting the training procedure of the filter when the filter meets the convergence condition; wherein the feedback error value of the filter is acquired by: receiving in an uplink direction, a first pairwise orthogonal sequence transmitted from a subscriber, and calculating the feedback error value based on the first pairwise orthogonal sequence; in a downlink direction, transmitting a second pairwise orthogonal sequence to the subscriber, receiving feedback error information corresponding to the feedback error value that is calculated by the subscriber based on the second pairwise orthogonal sequence, and deriving the feedback error value according to the feedback error information.