8. The method of claim 7 , wherein the secondary station uses a coding scheme during the second mode which generates a code word that is a punctured version of the code word that would be generated by the coding scheme used during the first mode.
7. A method of operating a radio communication system comprising a communication channel for the transmission of data from a secondary station to a primary station, the secondary station being operable in a first (normal) and a second (gated) mode, the method comprising the secondary station repeatedly transmitting a coded word providing information on transport formats applicable to the channel and transmitting a reduced quantity of information when operating in the second mode compared to that transmitted when operating in the first mode, and the primary station receiving and decoding the code word, wherein the secondary station uses a different coding scheme to generate the coded word in each of the modes and the primary station selects one of two different decoding schemes depending on the current mode of operation of the secondary station and decodes the coded word using the selected decoding scheme.