A wireless communication system includes a terminal and a base station for forming a plurality of sectors and receiving an uplink subframe from said terminal positioned in any of said plurality of sectors, according to an OFDMA/TDD scheme. Here, in said uplink subframe, said base station allocates a predetermined subchannel among subchannels usable by said base station to two predetermined sectors among said plurality of sectors in said uplink subframe, according to time division.