Device (UE1, 10) configured to store transport format parameters for decoding data packets received on a shared data channel carrying both fixed allocation packets, being packets in a logical channel for which a fixed allocation principle is configured, and normal packets for which the fixed allocation principle is not configured such that signalling information is signalled to the device on the shared control channel for every normal packet, the device comprising: means for receiving, on a shared signalling channel, signalling information comprising transport format parameters used on the shared data channel and for receiving an indication, in the signalling information on the shared signalling channel, whether the transport format parameters of the signalling information should be stored by the device; means for decoding a said fixed allocation packet on the shared data channel, wherein the device is configured to: if a CRC on said shared signalling channel is masked using an identifier for the device, decode the data packet according to the transport format parameters of the signalling information and store the transport format parameters of the signalling information when the indication indicates to the device that the transport format parameters of the signalling information should be stored for a subsequent said fixed allocation packet, wherein the indication indicates to the device that the transport format parameters of the signalling information received for the data packet should not be stored if the data packet is a retransmission (50, 52, 54); and if the CRC on said signalling channel is not masked using the identifier for the device, decode the fixed allocation packet using stored transport format parameters (50, 52, 56), and means for delivering decoded data to higher layers. means for receiving, on a shared signalling channel, signalling information comprising transport format parameters used on the shared data channel and for receiving an indication, in the signalling information on the shared signalling channel, whether the transport format parameters of the signalling information should be stored by the device; means for decoding a said fixed allocation packet on the shared data channel, wherein the device is configured to: if a CRC on said shared signalling channel is masked using an identifier for the device, decode the data packet according to the transport format parameters of the signalling information and store the transport format parameters of the signalling information when the indication indicates to the device that the transport format parameters of the signalling information should be stored for a subsequent said fixed allocation packet, wherein the indication indicates to the device that the transport format parameters of the signalling information received for the data packet should not be stored if the data packet is a retransmission (50, 52, 54); and if the CRC on said signalling channel is not masked using the identifier for the device, decode the fixed allocation packet using stored transport format parameters (50, 52, 56), and means for delivering decoded data to higher layers. if a CRC on said shared signalling channel is masked using an identifier for the device, decode the data packet according to the transport format parameters of the signalling information and store the transport format parameters of the signalling information when the indication indicates to the device that the transport format parameters of the signalling information should be stored for a subsequent said fixed allocation packet, wherein the indication indicates to the device that the transport format parameters of the signalling information received for the data packet should not be stored if the data packet is a retransmission (50, 52, 54); and if the CRC on said signalling channel is not masked using the identifier for the device, decode the fixed allocation packet using stored transport format parameters (50, 52, 56), and means for delivering decoded data to higher layers.