Throughput improvement for OFDMA femtocell networks through spectrum allocation and access control strategy

In this paper, we propose a novel scheme to improve the throughput of femtocell networks. The proposed scheme consists of two steps: spectrum allocation for femtocells and dealing with nearby macro-users with access control strategy. Since the positions of femtocells are relatively stable, we firstly deal with inter-femtocell interference and formulate it as an integer programming problem. Then we analyze the effects of different access strategies on system throughput for each sub-channel and propose a novel access control strategy. Finally, the superiority of the proposed scheme is verified by simulation results.