Interference Coordination for Co-Channel Deployed Macrocell and Small Cell Cluster

With the rapid development of small cell, the interference problem in small cell enhancement network is urgent to be solved. This paper focuses on the interference coordination for co-channel deployed macrocell and small cell cluster where interferences exist in both cross-tier and intra- tier. Considering different priorities of macrocell and small cell, a semi-distributed strategy is proposed to optimize network performance. Frequency resource allocation scheme is investigated to get a target of interference limitation and throughput optimization for the network. Non-cooperative game Cournot model is employed for power adjustment in small cell cluster to increase cell-edge throughput by considering power limitation and the influence of macrocell. Simulation results show that the proposed strategy improves system performance in cell-edge throughput and coverage. Moreover, the strategy can also be applied to the scenario that macrocell and small cell have different priorities successfully.