ENHANCED USE OF CRC SUMS
A method (700) for transmitting a signaling command and a transmit data frame which comprises payload and/or a header. The method comprises generating (705) a binary CRC check sum from the transmit data frame and adding(715) to the binary CRC check sum a binary sequence which corresponds to the signaling command, thereby generating a modified CRC check sum. According to the method, the binary sequence is of shorter or equal length than the binary CRC check sum and the adding (715) is performed as modulo-2 addition, the method further comprising transmitting (720) to a receiver the transmit data frame and the modified CRC check sum. There is also disclosed a corresponding method comprising receiving a data frame with payload and/or data and a binary CRC check sum in which a signaling command may have been inserted.