FIELD: mobile communication systems including those for data transmission through allocated control channel. SUBSTANCE: code-division multiple access communication system incorporates allocated control channel capable of effective transfer of control messages between base station and mobile station. Transmitting device controller incorporated in allocated control channel estimates frame length of message to be transferred and yields signal for selecting frame corresponding to frame length found by estimation. Message generator produces frame data on message to be transferred according to frame selection signal. Transmitter functions to stretch frame data and to transmit them over allocated control channel. Compressor incorporated in receiving device of allocated control channel functions to compress signal received. First message receiver provides for deinterleaving and decoding of compressed signal related to first frame length for outputting first message and detects first cyclic redundancy code corresponding to decoded signal. Second message receiver provides for deinterleaving and decoding of compressed signal related to second frame length for outputting second message and detects second cyclic redundancy code corresponding to decoded signal. Controller functions to select first or second message in compliance with results of detection of first and second cyclic redundancy codes. EFFECT: enhanced throughput capacity, reduced traffic delay. 27 cl, 21 dwg
