Hazem (. Increasing the efficiency of means for data transmission error detection in computer systems and networks

Thesis is dedicated to a problem of increasing of efficiency of data transmission error detecting in computers systems and network by expanding the class of guaranteed detecting errors, rising of errors detected probabilities and error control speed up. The way for expanding the class of guaranteed detecting errors by weighed checksum has been proposed. For guaranteed detecting errors with even multiple less than given level the proposed way provide to checksum components forming by utilization of partial-orthogonal codes. Algorithm for obtained of such codes have been worked out. By using of designed software which implemented this algorithm the tables of partial- orthogonal codes for practical application has been worked out. A new techniques for increasing the effectiveness of checksum error detection in computer network channels with spectrum modulation has been proposed. The way for checksum components coding has been developed. It has been shown that proposed checksum modification ensure superior digital data control transformation reliability in compare to Cyclic Redundancy Checking for channels with spectrum modulation. A new approach for data transitions error control operation accelerate by combined of Cyclic Redundancy Checking and checksum has been proposed.