Optimal Small/Macro-Cell Densities in 5G Heterogeneous Networks: Maximizing Small-Cell Throughput Under SIR Constraints

Heterogeneous cell deployment technique in 5G wireless networks has evolved as a promising solution for wireless and mobile communication to ensure proper network coverage and meet bandwidth requirements. The off-loading of users or subscribers from macro cell base stations to small cell base stations enhances the entire system throughput. The densely distributed small cells deployed under the conventional macro cell network (heterogeneous network or HetNet) is a potential option to meet the higher data rate requirements of the 5G wireless communications. The paper, therefore, analyzed the optimal deployment of small cells in HetNets to maximize and enhance the downlink and uplink throughput under the SIR (signal to interference ratio) constraints in terms of both macro cell and small cell densities. The work in this context presented mathematical formulas for measurements, optimization procedures, and MATLAB-based simulation results to establish the research.