Method of transmitting downlink channel rank information by using physical uplink shared channel

Channel rank information (RI; Rank Information) the number of bits in an uplink shared channel if at least three bits for transmission; a method of transmitting channel through (PUSCH Physical Uplink Shared Channel) rank information is disclosed. Using the channel rank information transmission method includes the steps, a 32-bit code length basis to channel rank information bit stream sequence (basis sequence) that maps the channel rank information is to be sent to the 3-bit or more channel rank information bit sequence according to the invention comprising the step of applying to a modulation mapper (modulation mapper) the bit sequence matching Muller coding and rate generated modulation symbols to-Reed-Muller coding (Reed-Muller coding) and rate matching (rate matching) step and lead to It can be. Therefore, a downlink channel rank information transmission method according to the invention when using multiple carrier band by the carrier aggregation For the application of more than four antennas in a downlink transmission, such as LTE-advanced in the 3GPP LTE release 10 after the on may be applied.