关键词: 软频率复用, 用户分类, 动态分配, 边缘吞吐量, 总吞吐量

Abstract: The classical fixed soft frequency reuse algorithm could not dynamically adjust frequency allocation based on distribution of cell-edge users in the inter-cell, which led to a decrease in cell-edge throughput. In order to solve the problem, one dynamic soft frequency reuse algorithm was proposed. This algorithm could allocate frequency dynamically depending on the number of cell-edge users. So the cell with more cell-edge users could be allocated more frequency for the cell-edge users and the cell with less cell-edge users could be allocated less frequency for the cell-edge users. The simulation results show compared with the classical fixed soft frequency reuse algorithm, when cell-edge users of different cells distribute evenly, this algorithm can improve cell-edge throughput by12.5% with 2% decrease in system throughput and when cell-edge users of different cells distribute unevenly, this algorithm can improve cell-edge throughput by25% with 3% decrease in system throughput.So the dynamic soft frequency reuse algorithm can effectively solve the problem of the decrease in cell-edge throughput when cell-edge users in the inter-cell distribute unevenly.

Key words: soft frequency reuse, user classification, dynamical allocation, cell-edge throughput, total throughput