/ Method for Sequence Error Detection and Correction in AAL 1 Type Cell

摘要

The present invention relates to a sequential error detection / correction method of an ATM cell. The sequential error detection / correction method of an ATM cell according to the present invention includes checking an SC field of an SN field of a SAR-PDU header, and then selecting the SAR-PDU. Determining whether it is normal (a); (B) checking an SNP field to detect an error of the CRC field according to the determination result of the SC field order, and correcting the SC field or the CRC field according to the error detection resu (C) detecting an error of a parity bit by checking the SNP field according to an error detection and correction result of the CRC field; And (d) determining whether the SN is valid or invalid based on the determination result and the error detection result of the steps (a) to (c) and transmitting the result to the convergence sublayer. According to the sequential error detection / correction method of an ATM cell according to the present invention, a conventional SN error analysis in a correction mode is performed by comparing an SC value, a CRC field value, and a parity bit value to compare a CRC field value and a parity bit value. It provides a more advanced error analysis method than SN error analysis in correction mode. Accordingly, the BER between the terminal and the terminal can be reduced, and in particular, the call quality in the voice transmission service sensitive to the BER between the terminal and the terminal can be improved.