Apparatus and method for configuring a relay frame control header in a multi-hop relay broadband wireless access communication system

A method of decoding a Relay Station (RS) Downlink (DL) MAP (R-MAP) in an RS of a Broadband Wireless Access (BWA) communication system, the method comprising:

• receiving from a Base Station (BS) a message including a modulation scheme of the R-MAP while at least one of an initial network entry process is performed by the BS and a communication with the BS is performed in a BS-RS area where communication is made with BSs connected to the RS;
• and
• decoding the R-MAP by using the modulation scheme,
• wherein the message comprises a Relay-Frame Control Header (R-FCH) received from the BS when communication starts in the BS-RS area and further wherein the message includes 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.

An apparatus for transmitting a Relay-Frame Control Header (R-FCH) in a Base Station (BS) of a Broadband Wireless Access (BWA) communication system, the apparatus comprising:

• a controller for 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
• a message generator for generating a message including the determined modulation scheme and for transmitting the generated message to the RS,
• wherein the message including the modulation scheme determined while performing the initial network entry process comprises the R-FCH transmitted to the RS when communication starts in the BS-RS area, and includes 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.

An apparatus for decoding a Relay Station (RS) Downlink (DL)-MAP (R-MAP) in an RS of a Broadband Wireless Access (BWA) communication system, the apparatus comprising:

• a message processor for receiving from a Base Station (BS) a message including a modulation scheme of the R-MAP while at least one of an initial network entry process is performed by the BS and a communication with the BS is performed in a BS-RS area where communication is made with BSs connected to the RS and for extracting from the message a modulation scheme of the R-MAP;
• and
• a controller for decoding the R-MAP by using the extracted modulation scheme,
• wherein the message comprises a Relay-Frame Control Header (R-FCH) received from the BS when communication starts in the BS-RS area,
• wherein the message includes 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.