METHOD OF CODE CYCLIC SYNCHRONISATION OF MESSAGES Russian patent published in 2012 - IPC H04L7/08 

FIELD: information technologies.

SUBSTANCE: output sequence is generated on a transmitting side, which contains information and check symbols of a convolution code following each other, check symbols of the convolution code are summed by a two module with symbols of synchronising sequence, and then the produced output sequence is transmitted along a communication channel. On the receiving side, the input sequence received in a sliding window is divided into a convolution code seed, as a result of division, the excess is the convolution code syndrome, then the produced syndrome of the convolution code is compared with the transmitted synchronising sequence, and number of errors is assessed. If the error number is below the threshold value, cyclic synchronisation is set, matching the start of the sliding receipt window, with the number of errors, which is equal or more than the threshold value, the sliding receipt window is displaced by one symbol in the input sequence, and calculation of the convolution code syndrome and assessment of the produced error number are repeated until the error number goes below the threshold value.

EFFECT: reduced volume of service information sent along a communication channel, for cyclic synchronisation of messages, and more efficient usage of communication channel resources.

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