Patent ID: 8599775

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 each of N slots of a subframe, and indexes of the PRBs for “N”-th slot are shifted with respect to indexes of the PRBs for “N−1”-th slot based on a predetermined gap, wherein the indexes of the VRBs are interleaved by a block interleaver, wherein the block interleaver includes N regions, the indexes of the VRBs are written row by row in the block interleaver and read out column by column, and a number of columns of the block interleaver is equal to K·N where K and N are integers greater than 0, and wherein, when nulls are inserted into the block interleaver, the nulls are inserted into K-th column in each of the N regions of the block interleaver, and when the indexes of the VRBs are read out from the block interleaver, the nulls are ignored.