A new method which optimizes frequency reuse in cellular radio systems

Abstract

Cellular Mobile Radio Systems require frequency reuse and cell splitting to effectively use the limited frequency spectrum and to facilitate system expansion. Various cell splitting techniques have been proposed to avoid the co-channel and adjacent-channel interference caused by the reuse of radio channels in cellular radio systems. The two major cell splitting techniques, thus far, are the four-cell repetition pattern and the seven-cell repetition pattern in which the cells are split into six sectors of 60 degrees or three sectors of 120 degrees respectively. The method presented in this paper has advantages in several aspects. In particular, it allows greater mobile density and higher efficiency on the radio channels due to the larger number of radio channels which can be assigned to each cell.