Patent ID: 7693096

Claim:
A method for transmitting a downlink MAP message by a Base Station (BS) in a wireless communication system, the method comprising the steps of: transmitting, to at least one Mobile Station (MS), the downlink MAP message including information on a two-dimensional data burst region, a mode information on a sub-burst Information Element (IE), and the sub-burst IE including information on sub-bursts, wherein the two-dimensional data burst region is partitioned into the sub-bursts by allocating a specified number of slots to each of the sub-bursts, and designated by a number of Orthogonal Frequency Division Multiple Access (OFDMA) symbols and a number of subchannels, wherein each of the slots is defined by a predetermined number of subchannels and OFDMA symbols, the mode information indicates a mode for the sub-burst IE, the mode is one of a plurality of modes, and the information on the sub-bursts indicates a region of each of the sub-bursts, and wherein the slots are allocated in a frequency-first order starting from a slot with the smallest symbol number and the smallest subchannel with an increasing subchannel number within the two-dimensional data burst region.