5,293 research outputs found
Analytical Evaluation of Coverage-Oriented Femtocell Network Deployment
This paper proposes a coverage-oriented femtocell network deployment scheme,
in which the femtocell base stations (BSs) can decide whether to be active or
inactive depending on their distances from the macrocell BSs. Specifically, as
the areas close to the macrocell BSs already have satisfactory cellular
coverage, the femtocell BSs located inside such areas are kept to be inactive.
Thus, all the active femtocells are located in the poor macrocell coverage
areas. Based on a stochastic geometric framework, the coverage probability can
be analyzed with tractable results. Surprisingly, the results show that the
proposed scheme, although with a lower defacto femtocell density, can achieve
better coverage performance than that keeping all femtocells in the entire
network to be active. The analytical results further identify the achievable
optimal performance of the new scheme, which provides mobile operators a
guideline for femtocell deployment and operation.Comment: 6 pages, 7 figures, published in IEEE International Conference on
Communications (ICC'13
On Modeling Coverage and Rate of Random Cellular Networks under Generic Channel Fading
In this paper we provide an analytic framework for computing the expected
downlink coverage probability, and the associated data rate of cellular
networks, where base stations are distributed in a random manner. The provided
expressions are in computable integral forms that accommodate generic channel
fading conditions. We develop these expressions by modelling the cellular
interference using stochastic geometry analysis, then we employ them for
comparing the coverage resulting from various channel fading conditions namely
Rayleigh and Rician fading, in addition to the fading-less channel.
Furthermore, we expand the work to accommodate the effects of random frequency
reuse on the cellular coverage and rate. Monte-Carlo simulations are conducted
to validate the theoretical analysis, where the results show a very close
match
Enhanced Inter-Cell Interference Coordination Challenges in Heterogeneous Networks
3GPP LTE-Advanced has started a new study item to investigate Heterogeneous
Network (HetNet) deployments as a cost effective way to deal with the
unrelenting traffic demand. HetNets consist of a mix of macrocells, remote
radio heads, and low-power nodes such as picocells, femtocells, and relays.
Leveraging network topology, increasing the proximity between the access
network and the end-users, has the potential to provide the next significant
performance leap in wireless networks, improving spatial spectrum reuse and
enhancing indoor coverage. Nevertheless, deployment of a large number of small
cells overlaying the macrocells is not without new technical challenges. In
this article, we present the concept of heterogeneous networks and also
describe the major technical challenges associated with such network
architecture. We focus in particular on the standardization activities within
the 3GPP related to enhanced inter-cell interference coordination.Comment: 12 pages, 4 figures, 2 table
- …