Patent ID: 8897159

Claim:
A method of transmitting feedback information by a relay station in a wireless communication system employing the relay station, the method comprising: receiving a feedback allocation advanced-MAP information element (IE) from a base station; measuring the feedback information in a unit of each partition by dividing a subband into a plurality of partitions, wherein each partition is one physical resource unit (PRU) including 18 subcarriers; and transmitting alternately the measured feedback information for each partition according to a specific period, wherein a unit of feedback measurement is determined by an ARS_Feedback_Mode field in the feedback allocation A-MAP IE, wherein if a value of the ARS_Feedback_Mode field has ‘1’, the measured feedback information is transmitted in the unit of the PRU, wherein if a value of the ARS_Feedback_Mode field has ‘0’, the measured feedback information is transmitted in the unit of the subband, wherein the value of the ARS_Feedback_Mode field is applied when a value of feedback mode is a specific value that supports a closed loop-single user (CL-SU) in a localized permutation for frequency selective scheduling, wherein the feedback information for two PRUs among the feedback information for four PRUs are transmitted together within a specific time period, and wherein the feedback information for each partition is cyclically and alternately transmitted in the order of the subband such that the feedback information for a fourth PRU is transmitted after transmission of the feedback information for a second PRU, which was transmitted after the transmission of the feedback information for a third PRU, which was transmitted after the transmission of the feedback information for a first PRU.