Joint Subcarrier and Power Allocation for Downlink Transmission in OFDMA Heterogeneous Networks

Abstract

Heterogeneous network is a novel network architecture proposed in Long-Term-Evolution (LTE) which can highly increase the capacity and coverage compared with the conventional networks. However, in order to provide the best possible services, appropriate resource management must be applied. In this paper, we consider the joint optimization of subcarrier and power allocation for downlink transmission in multi- cell orthogonal frequency division multiple access (OFDMA) heterogeneous networks. As far as we know, this is the first paper which joint optimize subcarrier and power allocation when full frequency reuse is assumed. We maximize the throughput by a mutual iterative algorithm. We show that our algorithm has a good performance and a low complexity.We also prove the convergence of our algorithm.