Effect of Environmental Factors on System Capacity and Coverage of Femtocell Networks

2013 ◽  
Vol E96.B (1) ◽  
pp. 201-207
Author(s):  
Hoon KIM
Keyword(s):  
Environmental Factors ◽  
System Capacity ◽  
Femtocell Networks ◽  
Capacity And Coverage

scholarly journals Stochastic Geometry Based Handover Modelling in Two-tier Femtocell Networks

2021 ◽  
Author(s):  
Joydev Ghosh
Keyword(s):  
Open Access ◽  
Stochastic Geometry ◽  
Base Stations ◽  
System Capacity ◽  
Femtocell Networks ◽  
Coverage Area ◽  
Important Concern ◽  
Access Mode ◽  
Capacity And Coverage

<div>This paper presents a two-tier cellular structure with femtocells in open access mode. The addition of these base stations extends the offered system capacity and coverage area of the network. This two network parameters nowadays becomes rather important to provide Quality of Service (QoS) for data-hungry applications. Femto base stations (FBS) are deployed randomly to extend the coverage of conventional base stations. Since the femtocells are operating here in open access mode, so that the handover probability parameter becomes important concern. In this article, we declare the handover probability using the fundamentals of stochastic geometry.</div>

scholarly journals Stochastic Geometry Based Handover Modelling in Two-tier Femtocell Networks

2021 ◽  
Author(s):  
Joydev Ghosh
Keyword(s):  
Open Access ◽  
Stochastic Geometry ◽  
Base Stations ◽  
System Capacity ◽  
Femtocell Networks ◽  
Coverage Area ◽  
Important Concern ◽  
Access Mode ◽  
Capacity And Coverage

<div>This paper presents a two-tier cellular structure with femtocells in open access mode. The addition of these base stations extends the offered system capacity and coverage area of the network. This two network parameters nowadays becomes rather important to provide Quality of Service (QoS) for data-hungry applications. Femto base stations (FBS) are deployed randomly to extend the coverage of conventional base stations. Since the femtocells are operating here in open access mode, so that the handover probability parameter becomes important concern. In this article, we declare the handover probability using the fundamentals of stochastic geometry.</div>

scholarly journals Uplink Resource Allocation for Interference Mitigation in Two-Tier Femtocell Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Sung-Yeop Pyun ◽  
Woongsup Lee ◽  
Ohyun Jo
Keyword(s):  
Resource Allocation ◽  
Interference Mitigation ◽  
Mobile Station ◽  
Base Stations ◽  
System Level ◽  
Optimization Scheme ◽  
Femtocell Networks ◽  
User Capacity ◽  
Resource Allocation Schemes ◽  
Capacity And Coverage

Two-tier femtocell networks, in which a large number of femto base stations (BSs) are deployed within a region overlapping with a macrocell, can provide an economical means of increasing user capacity and coverage. Given that femto BSs may be deployed with no cell planning, cross-tier interference generated from a number of macrocells and femtocells can cause severe problems. In particular, a macro mobile station (MS) that transmits uplink data may generate severe interference with adjacent femtocells, which causes performance degradation. In order to solve these problems, two novel resource allocation schemes, optimization and heuristic, are proposed, which efficiently reduce uplink interference in two-tier femtocell networks. Simulation results at the system level verify that both proposed schemes can improve the average capacity of the femtocells, but the heuristic scheme outperforms the optimization scheme in terms of computational complexity.

Reductionist thinking and animal models in neuropsychiatric research

2019 ◽  
Vol 42 ◽  
Author(s):  
Nicole M. Baran
Keyword(s):  
Animal Models ◽  
Mental Disorders ◽  
Environmental Factors ◽  
Neuropsychiatric Disorders ◽  
Model Organisms ◽  
Developmental Genetic ◽  
Term Study ◽  
Genetic And Environmental Factors ◽  
Mechanisms Of Plasticity

AbstractReductionist thinking in neuroscience is manifest in the widespread use of animal models of neuropsychiatric disorders. Broader investigations of diverse behaviors in non-model organisms and longer-term study of the mechanisms of plasticity will yield fundamental insights into the neurobiological, developmental, genetic, and environmental factors contributing to the “massively multifactorial system networks” which go awry in mental disorders.

The dual nature of obesity in metabolic programming: quantity versus quality of adipose tissue

2020 ◽  
Vol 134 (18) ◽  
pp. 2447-2451
Author(s):  
Anissa Viveiros ◽  
Gavin Y. Oudit
Keyword(s):  
Adipose Tissue ◽  
Environmental Factors ◽  
Maternal Obesity ◽  
Metabolic Programming ◽  
Dual Nature ◽  
Prevalence Of Obesity ◽  
Adipose Tissue Volume ◽  
Males And Females ◽  
Metabolically Healthy

Abstract The global prevalence of obesity has been rising at an alarming rate, accompanied by an increase in both childhood and maternal obesity. The concept of metabolic programming is highly topical, and in this context, describes a predisposition of offspring of obese mothers to the development of obesity independent of environmental factors. Research published in this issue of Clinical Science conducted by Litzenburger and colleagues (Clin. Sci. (Lond.) (2020) 134, 921–939) have identified sex-dependent differences in metabolic programming and identify putative signaling pathways involved in the differential phenotype of adipose tissue between males and females. Delineating the distinction between metabolically healthy and unhealthy obesity is a topic of emerging interest, and the precise nature of adipocytes are key to pathogenesis, independent of adipose tissue volume.

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