Patent ID: 6671832
Filing Date: 2003-12-30
Classification: H04L,H04Q

Abstract:
A method for checking a data transmission for errors, comprising:receiving a stream of data comprising a plurality of cells, each cell including a header portion and a data portion, the header portion including a virtual path identifier (VPI) and a virtual channel identifier (VCI); stripping the header portion from each of the plurality of cells; generating a cyclic redundancy code (CRC) for the data portion of each of the plurality of cells; calculating an overall CRC for a group of cells having the same VPI and VCI; comparing the overall CRC to an expected value to determine whether an error exists; determining that an error occurred when the overall CRC does not equal the expected value; identifying a particular cell that contains erroneous data; determining a link on which the particular cell that contains erroneous data has been transmitted; and comparing a plurality of links on which a plurality of particular cells that contains erroneous data has been transmitted.