Cost-effective interference coordination scheme in high dense small cell heterogeneous network

In this paper, we propose a cost-effective dynamic interference coordination scheme, which jointly optimizes the cooperative small cell base stations (SBSs) association and power allocation over subchannels. Our goal is to maximize the total small cell heterogeneous network utility, which consists of four parts: the rate of the macro cell, the rate of the hotzones, the rate of edge small cells as well as the cost from all SBSs. Coordinated multi-point processing scheme is used to reduce the inter-cell interference while increasing the transmission power. Moreover, User Equipments (UEs) behaviors which affect the state of SBS are also taken into consideration. In order to further improve the utility of the network, we deploy the edge SBSs to serve UEs far from macro base station (MBS) and other SBSs. Simulation results validate the effectiveness of the proposed scheme.