Fractional Frequency Reuse with Hybrid-Beam Trisector Cell Architectures for Cellular Mobile Networks

Abstract

This letter proposes a novel fractional frequency reuse (FFR) scheme with hybrid-beam trisector cell (HBTC) architectures that combine narrow-beam trisector cell (NBTC) and wide-beam trisector cell (WBTC) architectures to increase the system performance of cellular mobile networks. In the proposed FFR scheme, the macro base station first divides its macro user equipments (MUEs) into two groups, i.e., inner group (IG) and outer group (OG), based on the signal to interference plus noise ratio (SINR) of MUEs and then assigns subchannels to the MUEs in the IG and OG using the NBTC and WBTC antennas, respectively. Through simulation results, it is shown that the proposed FFR scheme outperforms other FFR schemes in terms of the SINR and capacity of MUEs.