1. A method, in an encoding node in a communication system, of conveying N additional bits with a block of data to be encoded and transmitted, the method comprising: determining respective values of the N additional bits; selecting a block code based on the N values; encoding the block of data by use of the block code selected; and conveying sequentially the N additional bits with the block of data, wherein N is an integer ≧1, and each of the N additional bits is a binary digit having a value of zero or one and wherein at least one of the N additional bits is related to at least one of control signaling and acknowledgements in an automatic repeat request procedure.