Patent ID: 6173431
Filing Date: 2001-01-09
Classification: H03M

Abstract:
A method of transmitting information packets in a communication device, the method comprising the steps of:providing user information to be transmitted;dividing the user information into at least two data blocks;determining a first layer of error detection for each of the at least two data blocks to produce a plurality of first layer error detections;determining a second layer of error detection for each of the at least two data blocks to produce a plurality of second layer error detections, the plurality of second layer error detections being distinct from the plurality of first layer error detections, wherein the distinctiveness of the plurality of second layer error detections from the plurality of first layer error detections results in expected differences at least between corresponding second layer error detections and first layer error detections;determining a secondary protection code based on the plurality of second layer error detections; andtransmitting an information packet that includes the at least two data blocks, the plurality of first layer error detections, and at least a portion of the secondary protection code in order to increase a probability of recovery of the user information at a receiving communication device.