In this paper we demonstrate the rate gains achieved by two-tier heterogeneous cellular networks (HetNets) with varying degrees of coordination between macrocell and microcell base stations (BSs). We show that without the presence of coordination, network densification does not provide any gain in the sum rate and rapidly decreases the mean per-user signal-to-interference-plus-noise-ratio (SINR). Our results show that coordination reduces the rate of SINR decay with increasing numbers of microcell BSs in the system. Validity of the analytically approximated mean per-user SINR over a wide range of signal-to-noise-ratio (SNR) is demonstrated via comparison with the simulated results.
@article{arxiv.1503.01566,
title = {Coordinated Two-Tier Heterogeneous Cellular Networks with Leakage Based Beamforming},
author = {Harsh Tataria and Mansoor Shafi and Peter J. Smith and Pawel A. Dmochowski},
journal= {arXiv preprint arXiv:1503.01566},
year = {2015}
}
Comments
7 pages, 8 figures, submitted to IEEE International Conference on Communications (ICC) 4th International Workshop on Small Cells and 5G (SmallNets), London, UK, June 2015