Patent ID: 8693424

Claim:
A method of mapping a virtual resource block (VRB) to a physical resource block (PRB) by a user equipment (UE) in a wireless communication system, the method comprising: acquiring, by the UE capable of aggregating carriers, one of which is used for a basic band and the others of which are used for at least one additional segment band, thereby extending a system bandwidth, a VRB allocation indicating the VRB allocated in the extended system bandwidth including the basic band and the additional segment band; determining, by the UE, a resource block group (RBG) size of the basic band on the basis of the number of resource blocks (RBs) within the basic band, wherein the number of RBs included in one RBG corresponds to the RBG size; determining, by the UE, the RBG size of the additional segment band based on the RBG size of the basic band irrespective of the number of RBs in the additional segment band such that the RBG size of the additional segment band is equal to the RBG size of the basic band; determining, by the UE, an RBG set by sequentially arranging RBGs within the additional segment band and RBGs within the basic band in a frequency domain; and mapping, by the UE, the VRB, which is allocated on the basis of the VRB allocation on the RBG set, to the PRB.