Joint power control and subchannel allocation for OFDMA femtocell networks using distributed auction game

In this paper, we investigate the co-tier and cross-tier interference mitigation problem using power control in a two-tier OFDMA femtocell network. By considering the femtocell base station (BS) as the auctioneer and the femtocell users as the bidders, we formulate this problem as an auction game, which aims at minimizing the total power radiated by the femtocell BS and guaranteeing the throughput requirement of the femtocell. Moreover, we propose a novel auction-based distributed algorithm, which can simultaneously allocate the power and subchannel resource through the auction game and achieve the near optimal performance with low computational complexity. Finally, simulation results are presented to demonstrate our proposed algorithm can effectively allocate power and frequency while obtaining a good performance of throughput requirement and power consumption.