| 主权项 |
1. A method for a relay to receive downlink control information from a base station through a Relay-Physical Downlink Control Channel (R-PDCCH), the method comprising:
determining one or more candidate positions for the R-PDCCH; monitoring whether or not the R-PDCCH is being transmitted at the one or more candidate positions; and receiving, through the monitoring that the R-PDCCH is being transmitted, the downlink control information included in the R-PDCCH, wherein the one or more candidate positions are set as a Virtual Resource Block (VRB) set including N VRBs, and a combination of 2 adjacent candidate positions among candidate positions of a lower aggregation level composes one of candidate positions of a higher aggregation level, wherein the VRBs of the VRB set are assigned numbers {n0, n1, . . . , nN−1}, starting from a lowest VRB index and ending with a highest VRB index, and wherein respective candidate positions for the R-PDCCHs of aggregation levels L are determined as VRBs of {n0, n1, . . . , nL−1}, {nL, nL+1, . . . n2L−1}, {n2L, n2L+2, . . . , n3L−1}, . . . {nN−L, nN−L+1, . . . , nN−1}. |
