STUDY OF THE FORMATION OF BLOCK CHECKSUM (BCC) OF THE TRANSMITTED DATA

Error detection methods are designed to detect distortions in messages when they are transmitted through noisy channels. The main idea embedded in them is the transfer of redundant service information, which can be used to judge with some degree of probability the reliability of the data received. Error detection methods are designed to detect distortions in messages when they are transmitted through noisy channels. The main idea embedded in them is the transfer of redundant service information, which can be used to judge with some degree of probability the reliability of the data received. The article discusses the use of the method of forming a block parity (BlockCheckCharacter, BCC) for the data block. BCC is used when transmitting blocks of characters to increase the likelihood of error detection. The essence of this method is to calculate the parity bit for both the row and the column. For the BCC generation method in question, an application was written in a high-level Java language, which allows obtaining results and collecting statistics on the detection / non-detection of transmitted data errors. The collected statistics show the probability of not detecting an error for the transmitted data block. To assess the likelihood of undetected distorted bits, the process of transferring data with erroneous bits was simulated. JavaDevelopmentKit software version 1.8 and the NetBeans IDE 8.0.2 development environment are used to write the application.

Authors: O. A. Turdiev, V. V. Yakovlev, S. V. Klimenko, A. X. Boltaev

Direction: Informatics, Computer Technologies And Control

Keywords: BCC (Block Check Character), block checksum, logical XOR operation, data byte, parity bit, check method

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