Resource management with multilevel interference mitigation in Heterogeneous Network

Time domain enhanced intercell interference coordination with Almost Blank Subframe (ABS) configuration for Macrocell is proposed in 3GPP to mitigate the inter-tier interference for heterogeneous networks (HetNets) consisting of Macrocells and overlaying Picos. The existing schemes for ABS power optimization are mainly base on the same level muted power of ABS, which will either cause time-frequency resource waste for Macrocell with zero power ABS or reduce the Pico cell range expansion capability with low power ABS. In this paper, we propose a multilevel power ABS scheme with resource management to conquer these problems. The simulation results show that our proposed scheme can improve the network throughput and protect the cell range expansion (CRE) area user effectively.