595 research outputs found
Analysis of LTE-A Heterogeneous Networks with SIR-based Cell Association and Stochastic Geometry
This paper provides an analytical framework to characterize the performance
of Heterogeneous Networks (HetNets), where the positions of base stations and
users are modeled by spatial Poisson Point Processes (stochastic geometry). We
have been able to formally derive outage probability, rate coverage
probability, and mean user bit-rate when a frequency reuse of and a novel
prioritized SIR-based cell association scheme are applied. A simulation
approach has been adopted in order to validate our analytical model;
theoretical results are in good agreement with simulation ones. The results
obtained highlight that the adopted cell association technique allows very low
outage probability and the fulfillment of certain bit-rate requirements by
means of adequate selection of reuse factor and micro cell density. This
analytical model can be adopted by network operators to gain insights on cell
planning. Finally, the performance of our SIR-based cell association scheme has
been validated through comparisons with other schemes in literature.Comment: Paper accepted to appear on the Journal of Communication Networks
(accepted on November 28, 2017); 15 page
Spatial spectrum and energy efficiency of random cellular networks
It is a great challenge to evaluate the network performance of cellular
mobile communication systems. In this paper, we propose new spatial spectrum
and energy efficiency models for Poisson-Voronoi tessellation (PVT) random
cellular networks. To evaluate the user access the network, a Markov chain
based wireless channel access model is first proposed for PVT random cellular
networks. On that basis, the outage probability and blocking probability of PVT
random cellular networks are derived, which can be computed numerically.
Furthermore, taking into account the call arrival rate, the path loss exponent
and the base station (BS) density in random cellular networks, spatial spectrum
and energy efficiency models are proposed and analyzed for PVT random cellular
networks. Numerical simulations are conducted to evaluate the network spectrum
and energy efficiency in PVT random cellular networks.Comment: appears in IEEE Transactions on Communications, April, 201
- …