Radio communication system for an industrial automation system, having - at least one radio base station, which comprises at least one radio transmission and reception unit, - at least one radio subscriber station (202, 203), which is connectable to the radio base station and comprises at least one radio transmission and reception unit (221, 231), - wherein the radio base station and the radio subscriber station are designed and configured to interchange data frames (10, 20) with one another, said data frames being transmitted using at least one selected carrier frequency, and to transmit data frames that are to be sent redundantly in parallel using multiple different carrier frequencies (11-13, 21-23), - wherein the radio base station and the radio subscriber station each comprise a multiplexer unit (212, 222, 232) for data frames that are to be sent redundantly, and comprise a redundancy handling unit for processing received redundant data frames, wherein the redundancy handling units are each designed and configured to detect received redundant data frames and/or to restore redundantly sent data frames from different data frame fragments, characterized in that - the redundancy handling units are each designed and configured to restore redundantly sent data frames from different data frame fragments by means of maximum ratio combining, selection combining or incremental redundancy, - the radio base station and the radio subscriber station are each designed and configured to temporarily enable carrier frequencies that are no longer needed for transmitting data frames identified as time-critical for transmitting data frames identified as non-time-critical. - at least one radio base station, which comprises at least one radio transmission and reception unit, - at least one radio subscriber station (202, 203), which is connectable to the radio base station and comprises at least one radio transmission and reception unit (221, 231), - wherein the radio base station and the radio subscriber station are designed and configured to interchange data frames (10, 20) with one another, said data frames being transmitted using at least one selected carrier frequency, and to transmit data frames that are to be sent redundantly in parallel using multiple different carrier frequencies (11-13, 21-23), - wherein the radio base station and the radio subscriber station each comprise a multiplexer unit (212, 222, 232) for data frames that are to be sent redundantly, and comprise a redundancy handling unit for processing received redundant data frames, wherein the redundancy handling units are each designed and configured to detect received redundant data frames and/or to restore redundantly sent data frames from different data frame fragments, - the redundancy handling units are each designed and configured to restore redundantly sent data frames from different data frame fragments by means of maximum ratio combining, selection combining or incremental redundancy, - the radio base station and the radio subscriber station are each designed and configured to temporarily enable carrier frequencies that are no longer needed for transmitting data frames identified as time-critical for transmitting data frames identified as non-time-critical.