A New Look at Optimum Macro Base Station Deployment in Heterogeneous Massive MIMO Networks for Eliminating Interference

摘要

Massive multiple input multiple output (MIMO) Heterogeneous Networks (HetNets) are integral part of 5G systems. They can be viewed in three dimensional (3D) space where, each slice represents a unique tier that has its own Base stations (BS) and user equipments (UEs). Different slices cooperate with each other for mutual benefit. Data can be interactively exchanged among the tiers, and UEs have the flexibility to switch between the tiers. Poisson point process (PPP) has been widely used to allocate BSs and UEs among various tiers so far. However, BS locations using PPP approach may not be optimum to reduce interference. In this paper, we develop a new algorithm to find the optimum locations of Macro BSs in HetNets where every Macro BS along with its associate Micro BSs is treated as an independent unit after almost eliminating interference from neighboring Macro and Micro BSs. Hence, this approach provides increased coverage area and enhanced quality of service. Simulation results show the validity of our approach and promises enhancement to system performance.