Abstract
Massive Multiple-Input Multiple-Output (MIMO), small cell, and full-duplex are promising techniques for future 5G communication systems, where interference has become the most challenging issue to be coped with. In this paper, we provide an interference coordination framework for a two-tier heterogeneous network (HetNet) that consists of a massive-MIMO enabled macro-cell base station (MBS) and a number of full-duplex small-cell base stations (SBSs). To suppress the interferences and maximize the throughput, the full-duplex mode of each SBS, i.e., in-band or out-of-band, which has different impact on the interference pattern, should be carefully selected. To address this problem, a distributed graph color algorithm (DGCA) based on price is proposed. Numerical results demonstrate that DGCA significantly improves the system throughput.
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