Patent ID: 7515562

Claim:
A method for configuring a subchannel in a broadband wireless access communication system, which includes a plurality of cells distinguished by cell identifications and has an entire frequency band divided into a plurality of sub-carrier bands, said system further includes a subchannel/subcarrier allocator, which performs said method, the method comprising the steps of: generating a plurality of subchannels based on a predetermined subchannel configuration scheme in each of the cells included in the communication system; determining a predetermined number of subchannels from among the generated subchannels as soft handover subchannels; renumbering indexes of sub-carrier bands included in remaining subchannels except for the subchannels determined as the soft handover subchannels; and generating a plurality of non-soft handover subchannels including different sub-carrier bands depending on the cells, by using a specific cell identification of each cell and the renumbered indexes of sub-carrier bands, wherein the subchannel configuration scheme is determined by: subcarrier ⁡ ( k , s ) = ( N subch - N ho ) ⁢ n k + { P s ⁡ [ n k ⁢ ⁢ mod ⁢ ⁢ ( N subch - N ho ) ] + ID cell } ⁢ ⁢ mod ⁢ ⁢ ( N subch - N ho ) , and wherein ‘subcarrier (k,s)’ represents an index of a k th sub-carrier in a s th subchannel, ‘N subch ’ represents the number of subchannels, ‘ID cell ’ represents a base station ID for a corresponding cell, ‘N ho ’ represents a required number of soft handover subchannels, ‘N tones ’ represents the number of sub-carriers for configuring one subchannel, n k =(k+13s)mod N tones , and ‘p s [i]’ represents a value of an i th element obtained through an ‘s’ times leftward cyclic-shift of {tilde over (p)}.