Patent ID: 8134944

Claim:
A method of transmitting a Relay-Frame Control Header (R-FCH) in a Base Station (BS) of a Broadband Wireless Access (BWA) communication system, the method comprising: determining a modulation scheme of a Relay Station (RS) Downlink (DL)-MAP (R-MAP) in consideration of a channel state with the RS while at least one of an initial network entry process is performed by the RS and a communication with the RS is performed in a BS-RS area where communication is made with RSs connected to the BS; and transmitting a message including the determined modulation scheme to the RS, wherein, the transmitting of the message including the modulation scheme comprises transmitting the R-FCH, which is transmitted to the RS when communication starts in the BS-RS area, by combining at least one of the modulation scheme and an index mapped to the modulation scheme, and wherein the R-FCH combined with at least one of the modulation scheme and the index mapped to the modulation scheme comprises at least one element selected from a group consisting of sub-channel group information in the BS-RS area, repetition coding indication information on the R-MAP transmitted in the BS-RS area, modulation scheme information on the R-MAP, coding scheme information on the R-MAP, Downlink Interval Usage Code (DIUC) index information which is mapped to a combination of modulation and coding on the R-MAP, R-MAP length information indicating a length of the R-MAP, and start offset information of a BS-RS area in a next frame.