In a wireless mobile communication system, user equipment receives downlink data and downlink control information including resource allocation information for the downlink data from a base station. Downlink data is mapped to physical resource blocks (PRBs) based on the downlink control information. The resource allocation information indicates virtual resource block (VRB) allocations for the user equipment. Indexes of PRBs to which the downlink data are mapped are determined based on mapping relationship between VRBs and the PRBs. The mapping relationship is defined such that indexes of the VRBs are mapped to indexes of the PRBs for a first part and a second part of a subframe. The received downlink control information includes control information that determines whether the indexes of the PRBs for the second part are separated with respect to the indexes of the PRBs for the first part based on a predetermined gap in a distributed mode where distributed VRBs are used or whether the indexes of the PRBs for the second part are not separated with respect to the indexes of the PRBs for the first part in a non-distributed mode where localized VRBs are used.