Coverage in tiered cellular networks with spatial diversity

Authors:
Vikram Chandrasekhar;Marios Kountouris;Jeffrey G. Andrews
Affiliations:
Texas Instruments;Dept. of Telecommunications, Ecole Supérieure d'Electricité, France;Dept. of Electrical and Computer Engineering, The University of Texas at Austin
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 4
Cited 0

Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff

Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
Coverage in multi-antenna two-tier networks

IEEE Transactions on Wireless Communications
Transmission capacity of ad hoc networks with spatial diversity

IEEE Transactions on Wireless Communications - Part 1
Femtocell networks: a survey

IEEE Communications Magazine

Quantified Score

Hi-index	0.01

Visualization

Abstract

In two-tier networks - comprising a conventional cellular network overlaid with shorter range femtocell hotspots - with universal frequency reuse, the near-far effect from crosstier interference diminishes coverage for users in either tier. Equipping the macrocell and femtocell basestations (BSs) with multiple antennas can enhance robustness against the near-far problem. Given a per-tier outage probability constraint, this work derives coverage radii wherein cross-tier interference bottlenecks cellular and hotspot coverage. Single-user (SU) multiple antenna transmission at each tier is shown to provide significantly superior coverage and spatial reuse relative to multiuser (MU) transmission. We propose a decentralized carrier sensing approach to regulate femtocell transmission powers for ensuring reliable cellular coverage. Simulations using typical path loss scenarios show that our interference management strategy provides reliable cellular coverage with about 60 femtocells per cellsite.