Patent ID: 8731088

Claim:
A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (MIMO) system that supports dual layer transmission based on first and second antenna ports, the method comprising: receiving downlink control information (DCI) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including at least a first transport block or a second transport block, wherein the downlink control information includes a new data indicator (NDI) for each of the first and second transport blocks, wherein, when the downlink control information indicates that the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received among the first and second antenna ports, wherein the new data indicator is given by 1 bit, and the antenna port through which the second transport block is received is indicated by the 1-bit new data indicator for the first transport block, and wherein the first and second antenna ports correspond, respectively, to first and second layers for the dual layer transmission of the first and second transport blocks.