Patent ID: 8228863

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, when an index d of one of the VRBs is given, an index P 1,d of one of the PRBs on the first slot mapped to the index d is given as in expression (1) and an index P 2,d of one of the PRBs on the second slot mapped to the index d is given as in expression (2), wherein ⁢ [ Expression ⁢ ⁢ ( 1 ) ] p 1 , d = { p 1 , d ′ , when ⁢ ⁢ N null = 0 ⁢ ⁢ or ⁢ ⁢ ( d < N DVRB - N null ⁢ ⁢ and ⁢ ⁢ mod ⁢ ( d , C ) < 2 ) p 1 , d ′ - N null 2 , when ⁢ ⁢ ⁢ N null ≠ 0 ⁢ ⁢ and ( d < N DVRB - N null ⁢ ⁢ and ⁢ ⁢ mod ⁡ ( d , C ) ≥ 2 ) where ⁢ ⁢ p 1 , d ′ = mod ⁡ ( d , C ) · R + ⌊ d / C ⌋ p 1 , d = { p 1 , d ′ - R + N null 2 , when ⁢ ⁢ N null ≠ 0 ⁢ ⁢ and ⁢ ( d ≥ N DVRB - N null ⁢ ⁢ ⁢ and ⁢ ⁢ mod ⁢ ( d , C / 2 ) = 0 ) p 1 , d ′ - R , when ⁢ ⁢ N null ≠ 0 ⁢ ⁢ and ( d ≥ N DVRB - N null ⁢ ⁢ and ⁢ ⁢ mod ⁡ ( d , C / 2 ) = 1 ) where ⁢ ⁢ p 1 , d ′ = mod ⁡ ( d , C / 2 ) · 2 ⁢ R + ⌊ 2 ⁢ d / C ⌋ ⁢ [ Expression ⁢ ⁢ ( 2 ) ] p 2 , d = mod ⁡ ( p 1 , d + N DVRB / 2 , N DVRB ) where R is a number of rows of the block interleaver, C is a number of columns of the block interleaver, N DVRB is a number of the consecutive indexes of the VRBs interleaved by the block interleaver, mod means a modulo operation, and N null denotes a number of nulls inserted into the block interleaver.