Deployment efficiency vs energy efficiency in dense wireless environment using massive MIMO

Today's wireless environment is very dense to support enhanced performance, which is become heterogeneous in cell, applications, services, standards and technologies. This dense deployment of heterogeneous cells has a large impact on the power consumption of network. Thus, issue of energy efficiency need to be considered in perspective of deploy of several base station (BS) in the area. In 5G standard, massive MIMO architecture has been proposed to enhance energy efficiency (EE) of network. In this paper, we have considered the heterogeneous network (HetNet), where microcell, picocell and femtocell are coexist within macrocell. The macrocell BSs (MBS) are equipped with large array of antennas and all other BSs are supported with limited number of antennas. This work assumes users are supported by massive MIMO architecture, where MBS and few nearest BSs are participated. In this paper, we mainly investigate the impact of deployment efficiency of heterogeneous small cells BSs and, user association in a HetNet with massive MIMO to maximize the system energy efficiency (EE). Our results show that involvement of nearest BSs is greatly enhance the system energy efficiency (EE) and the deployment efficiency of small cells in macrocell environment also have impact on system EE.