蜂窝系统中改进的部分频率复用方法

In this paper, we paper propose a dynamic frequency planning scheme for downlink OFDMA to provide higher cell capacity. In order to mitigate the inter-cell interference (ICI), we joint the fractional frequency reuse (FFR) and interference coordination and propose a new effective subcarrier distribution method, which divides subcarriers into three main overlapping groups to three sectors and there are no rigid boundaries between center and edge groups. The subcarrers are distributed between the groups depending on load and the channel state information. The base stations (BSs) schedule subcarriers from different distributions and different orders to avoid interference. According to the simulation result, the proposed algorithms effectively increase the resource utilization rate and decrease the system outage probability especially in highly loaded cells.