Patent ID: 6560459
Filing Date: 2003-05-06
Classification: H04W

Abstract:
A frequency allocation system for a cellular communication system comprising:a plurality of cells residing substantially adjacent to each other, each cell having at least a first group of sectors and a second group of sectors, wherein said first group of sectors and said second group of sectors provide semicircular shaped coverage to radio telephones; wherein a first frequency is utilized in said first group of sectors and a second, different frequency is utilized in said second group of sectors, wherein frequencies can be re-utilized by said plurality of cells with greater efficiency because interference between said adjacent cells is reduced; wherein said semicircular shaped coverage provided by said first sector and said semicircular shaped coverage provided by said second sector combine to provide circular coverage around an antenna; and wherein said first group of sectors has a plurality of adjacent sectors located within adjacent cells and less than three of said adjacent sectors within adjacent cells utilize the same frequency that is utilized by said first group of sectors.