A base station comprising: a communication unit for communicating with a mobile terminal via a relay link between the base station and a relay device and an access link between the relay device and the mobile terminal; and an allocation unit for allocating an uplink and a downlink of each of the relay link and the access link to resource blocks included in any of a plurality of resource block groups, wherein the allocation unit is configured to allocate a resource block included in a first resource block group to a downlink of the relay link (R-d); allocate a resource block included in a second resource block group to a downlink of the access link (A-d); allocate a resource block included in a third resource block group to an uplink of the access link (A-u); and allocate a resource block included in a fourth resource block group to an uplink of the relay link (R-u), characterized in that the first resource block group is same in frequency but different in time from the second resource block group, and is same in time but different in frequency from the third resource block group, and in that the fourth resource block group is same in time but different in frequency from the second resource block group, and is same in frequency but different in time from the third resource block group, wherein the communication unit is further configured to communicate with the mobile terminal via a direct link and the allocation unit is further configured to allocate a resource block in each of the first, second, third and fourth resource block group for an uplink of a direct link (D-u) or a downlink of the direct link (D-d). a communication unit for communicating with a mobile terminal via a relay link between the base station and a relay device and an access link between the relay device and the mobile terminal; and an allocation unit for allocating an uplink and a downlink of each of the relay link and the access link to resource blocks included in any of a plurality of resource block groups, wherein the allocation unit is configured to allocate a resource block included in a first resource block group to a downlink of the relay link (R-d); allocate a resource block included in a second resource block group to a downlink of the access link (A-d); allocate a resource block included in a third resource block group to an uplink of the access link (A-u); and allocate a resource block included in a fourth resource block group to an uplink of the relay link (R-u), allocate a resource block included in a first resource block group to a downlink of the relay link (R-d); allocate a resource block included in a second resource block group to a downlink of the access link (A-d); allocate a resource block included in a third resource block group to an uplink of the access link (A-u); and allocate a resource block included in a fourth resource block group to an uplink of the relay link (R-u), characterized in that the first resource block group is same in frequency but different in time from the second resource block group, and is same in time but different in frequency from the third resource block group, and in that the fourth resource block group is same in time but different in frequency from the second resource block group, and is same in frequency but different in time from the third resource block group, wherein the communication unit is further configured to communicate with the mobile terminal via a direct link and the allocation unit is further configured to allocate a resource block in each of the first, second, third and fourth resource block group for an uplink of a direct link (D-u) or a downlink of the direct link (D-d). in that the fourth resource block group is same in time but different in frequency from the second resource block group, and is same in frequency but different in time from the third resource block group, wherein the communication unit is further configured to communicate with the mobile terminal via a direct link and the allocation unit is further configured to allocate a resource block in each of the first, second, third and fourth resource block group for an uplink of a direct link (D-u) or a downlink of the direct link (D-d).