Patent 7304967 was granted and assigned to NEC Corporation on December, 2007 by the United States Patent and Trademark Office.
Time slots are allocated such that when one base station is transmitting to a terminal located in a boundary region of the respective cells of neighboring base stations, the other base stations transmit to terminals located in areas other than the boundary region, or when one on the neighboring base stations is transmitting to a terminal in a boundary region in a first sector, the other base stations transmit to terminals located in areas other than the boundary region of respective cells of those base stations in the sector opposing the first sector.