Patent ID: 7525953
Filing Date: 2009-04-28
Classification: H04L,H04M

Abstract:
1. A method of establishing a communication link in an ADSL system using a bearer channel and latency mode when transmitting/receiving initialization messages and transmitting/receiving the initialization messages by using message tones and backup tones, the method comprising: (a) receiving the initialization messages from the message tones and the backup tones; (b) performing a bit masking operation on the initialization messages of the message tones and the backup tones to remove first errors thereof; (c) correcting second errors of one of the initialization messages of the message tones and the backup tones of which the first errors are bit-masked in the step (b); (d) performing a cyclic redundancy check operation on the initialization message having the corrected second errors to check for uncorrected second errors; and (e) determining link establishment or link failure of the communication link on which the initialization messages are transmitted based on the result of the cyclic redundancy check of the step (d).