Patent ID: 8315222

Claim:
A method for transmitting downlink data using resource blocks at a base station in a wireless mobile communication system, the method comprising: transmitting downlink data mapped to physical resource blocks (PRBs) to a user equipment, wherein indexes of virtual resource blocks (VRBs) are mapped to indexes of the PRBs for a first slot and a second slot of a subframe, and the indexes of the PRBs for the second slot are shifted with respect to the indexes of the PRBs for the first slot based on a predetermined gap, wherein the indexes of the VRBs are interleaved by a block interleaver, wherein a number, N DVRB , of the VRBs is given as: N DVRB =min( N PRB −N gap ,N gap )·2 where N gap denotes a value of the predetermined gap, and N PRB denotes a number of the PRBs in a system bandwidth.