ENERGY EFFICIENCY OF MULTI-LTE MACRO CELL CELLULAR NETWORKS: MODELLING AND ANALYSIS

摘要

This paper evaluates the impact of multi-macro cell systems on the energy efficiency of Long Term Evolution (LTE) cellular networks. Both the proposed model and the analysis of the EE in this study take into account (i) the path losses, fading, and shadowing that affect the received signal at the UE within the same cell, and (ii) the interference effects of adjacent cells. The simulation results show that the interference from adjacent cells can degrade the EE of a multi-cell cellular network. With the high interference from cell2 and cell3 (at the edge of the cell1), the number of bits that will be transferred per joule of energy is 0.78 kb/J with a 1.4 MHz bandwidth and two transmit antennas. With a 20 MHz bandwidth and two transmit antennas, the transfer rate increases to 11.17 kb/J. However, the EE will improve if the number of antennas is increased. The results of this study provide insight into the impact of the number of antennas and the interference from adjacent cells on achieving real gains in the EE of multi-cell LTE cellular networks.