摘要：In this paper, we consider a two-tier heterogeneous Orthogonal Frequency Division Multiple Access (OFDMA) network which consists of one Full Duplex (FD) macrocell and several FD femtocells. Enhanced Inter-Cell Interference Coordination (elCIC) by means of Almost Blank Subframe (ABS) is considered to reduce the cross-tier interference. We formulate a resource allocation problem to maximize the sum-rate of the network by jointly allocating subcarrier and power among user equipments (UEs). The problem is solved by a sub-optimal algorithm, which greedily allocates subcarriers based on necessary conditions of the optimization problem and then distributes power of Base Stations (BSs) and UEs by Iterative Water Filling (IWF) procedure. Simulation results reveal that the proposed subcarrier and power allocation algorithm improve the throughput over the Time Division Duplexing (TDD) Half Duplex (HD) system and the FD system with a round-robin scheduler. The FD gain of the macrocell can achieve 45% when the ABS scheme is applied, while the FD technique almost doubles the throughput of the femtocells.
关键词：Full duplex;OFDMA;resource allocation;subcarrier and power allocation
