A Novel Dynamic Full Frequency Reuse Scheme in OFDMA Cellular Relay Networks

In this paper, a novel dynamic full frequency reuse scheme is proposed to improve the spectral efficiency in orthogonal frequency division multiple access (OFDMA) cellular relay networks. Different from the conventional full frequency reuse scheme which only allows the base station (BS) reusing the subcarriers in the specific regions, we proposed an improved full frequency reuse scheme to allow the BS reusing all the subcarriers in the whole BS coverage region to exploit more multiuser diversity gain. In order to dynamically reuse the frequency resource among the BS and relay stations (RSs) to further improve the spectral efficiency, the adaptive subcarrier scheduling is introduced into the improved full frequency reuse scheme, which forms the proposed novel dynamic full frequency reuse scheme. Simulation results show that the proposed scheme can obtain high spectral efficiency, fine fairness and low outage probability.