14,111 research outputs found
On Modeling Heterogeneous Wireless Networks Using Non-Poisson Point Processes
Future wireless networks are required to support 1000 times higher data rate,
than the current LTE standard. In order to meet the ever increasing demand, it
is inevitable that, future wireless networks will have to develop seamless
interconnection between multiple technologies. A manifestation of this idea is
the collaboration among different types of network tiers such as macro and
small cells, leading to the so-called heterogeneous networks (HetNets).
Researchers have used stochastic geometry to analyze such networks and
understand their real potential. Unsurprisingly, it has been revealed that
interference has a detrimental effect on performance, especially if not modeled
properly. Interference can be correlated in space and/or time, which has been
overlooked in the past. For instance, it is normally assumed that the nodes are
located completely independent of each other and follow a homogeneous Poisson
point process (PPP), which is not necessarily true in real networks since the
node locations are spatially dependent. In addition, the interference
correlation created by correlated stochastic processes has mostly been ignored.
To this end, we take a different approach in modeling the interference where we
use non-PPP, as well as we study the impact of spatial and temporal correlation
on the performance of HetNets. To illustrate the impact of correlation on
performance, we consider three case studies from real-life scenarios.
Specifically, we use massive multiple-input multiple-output (MIMO) to
understand the impact of spatial correlation; we use the random medium access
protocol to examine the temporal correlation; and we use cooperative relay
networks to illustrate the spatial-temporal correlation. We present several
numerical examples through which we demonstrate the impact of various
correlation types on the performance of HetNets.Comment: Submitted to IEEE Communications Magazin
Statistical QoS Analysis of Full Duplex and Half Duplex Heterogeneous Cellular Networks
In this paper, statistical Quality of Service provisioning in next generation
heterogeneous mobile cellular networks is investigated. To this aim, any active
entity of the cellular network is regarded as a queuing system, whose
statistical QoS requirements depend on the specific application. In this
context, by quantifying the performance in terms of effective capacity, we
introduce a lower bound for the system performance that facilitates an
efficient analysis. We exploit this analytical framework to give insights about
the possible improvement of the statistical QoS experienced by the users if the
current heterogeneous cellular network architecture migrates from a Half Duplex
to a Full Duplex mode of operation. Numerical results and analysis are
provided, where the network is modeled as a Mat\'ern point processes with a
hard core distance. The results demonstrate the accuracy and computational
efficiency of the proposed scheme, especially in large scale wireless systems
Analysis of Statistical QoS in Half Duplex and Full Duplex Dense Heterogeneous Cellular Networks
Statistical QoS provisioning as an important performance metric in analyzing
next generation mobile cellular network, aka 5G, is investigated. In this
context, by quantifying the performance in terms of the effective capacity, we
introduce a lower bound for the system performance that facilitates an
efficient analysis. Based on the proposed lower bound, which is mainly built on
a per resource block analysis, we build a basic mathematical framework to
analyze effective capacity in an ultra dense heterogeneous cellular network. We
use our proposed scalable approach to give insights about the possible
enhancements of the statistical QoS experienced by the end users if
heterogeneous cellular networks migrate from a conventional half duplex to an
imperfect full duplex mode of operation. Numerical results and analysis are
provided, where the network is modeled as a Matern point process. The results
demonstrate the accuracy and computational efficiency of the proposed scheme,
especially in large scale wireless systems. Moreover, the minimum level of self
interference cancellation for the full duplex system to start outperforming its
half duplex counterpart is investigated.Comment: arXiv admin note: substantial text overlap with arXiv:1604.0058
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