Association of control information to the control channel element

The present invention relates to a novel structure of a control channel region in a subframe of a communication system of 3GPP system using OFDM for downlink. The novel structure of the control channel region, particularly suitable for the transmission of physical downlink control channel information from the donor eNodeB to the relay node. Control channel region, regardless of whether there are more cell-specific and / or UE-specific reference signal in the control channel region is divided into CCE equal size. This control channel region is divided into a plurality of sub-CCE, a combination of sub-CCE, it is achieved by the CCE all equal size (in terms of resource elements available for signaling control information) . Control channel region, in order to obtain sub-CCE, in the frequency domain and / or time domain, FDM scheme respectively, is divided in a TDM manner.