FIELD: communication equipment. SUBSTANCE: method involves reception of messages with message indicator and multiplicity of encoded units. If at least one unit from multiplicity of encoded units is received with error, then second message requests repeated transmission of at least one unit. After reception of repeated transmission of at least one unit without error, method involves generation of key sequence with message indicator, and decoding of at least one unit using said key sequence. EFFECT: increased throughput capacity. 7 cl, 6 dwg
