The invention relates to a method and an assembly for synchronizing data transmission, comprising at least one first radio system and at least one additional radio system. According to said method, the transmission behavior of the first radio system or systems is evaluated at one point in time x and at least one time interval that follows said point x is calculated in advance between the data blocks. During said interval there is no transmission by the first radio system or systems, or a transmission is expected and the additional radio system or systems can be controlled so that data is transmitted during a time interval of this type.