In this paper we investigate the effect of Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) propagation on the Area Spectral Efficiency (ASE) and on the energy efficiency of dense small-cell networks. We show that including both LOS and NLOS propagation in the path-loss model provides a completely different picture of the behaviours of ASE and energy efficiency than what would be observed in case of either LOS or NLOS propagation only. In particular, with combined LOS/NLOS pathloss, the ASE exhibits superlinear and sublinear behaviour at low and high cell densities, respectively. In addition, the energy efficiency as a function of the cell density has a global maximum and is not a monotonically increasing function like in case of LOS or NLOS propagation only. Based on our findings, we claim that Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) propagations play an important role in studying the performance of extremely dense small-cell networks. Index Terms-Dense networks, small-cells, area spectral efficiency, energy efficiency, transmit power, LOS, NLOS.
For instance, in REF it was shown that by using a combined Line-Of-Sight (LOS)/Non-Line-Of-Sight (NLOS) path loss model the ASE becomes superlinear at low densities and sublinear at high densities.
Effect of LOS/NLOS propagation on area spectral efficiency and energy efficiency of small-cells
2014 IEEE Global Communications Conference
2014 IEEE Global Communications Conference
Computer Science