Downlink Energy Efficiency of Heterogeneous LTE-A

In the face of ever evolving modern communication techniques, energy efficiency is always given paramount importance. In a cellular system, the most dominant energy consuming equipment are the BSs in a radio access network (RAN). Energy consumed by the BSs is estimated between 60%-80%. Contemporary BSs consume a considerable amount of energy even at no traffic load. Conventional accounting for inherent high-degree temporal-spatial traffic diversity, are wasting a significant amount of electrical energy, especially during low-traffic periods. Therefore, most recently, the idea of attaining an energy efficient network by reducing energy consumption in BSs has become the spotlight of many researchers. In this content, we analyze the downlink energy efficiency of a heterogeneous Long Term Evolution- Advanced (LTE-A) cellular system which uses CoMP techniques, specifically Dynamic Point Selection (DPS) and Joint Transmission (JT). LTE Advanced systems take advantage of advanced topology networks; such as optimized heterogeneous networks with a mix of macro cell with low power small cells such as picocell and femtocells.