Patent ID: 8305988

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), 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, wherein 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 mapping of the indexes of the VRBs to the indexes of the PRBs includes interleaving of the indexes of the VRBs by a block interleaver, wherein the indexes of the VRBs are written row by row in a matrix used by the block interleaver, and read out column by column, wherein a number, R, of rows of the block interleaver is given as: R=┌N DVRB /( C·M RBG )┐· M RBG where N DVRB is a number of consecutive indexes of the VRBs interleaved by the block interleaver, C is a number of columns of the block interleaver, and M RBG is a number of consecutive PRBs that constitute a resource block group (RBG).