SEARCH ENGINEERING RESEARCH PAPERS

Femtocell Research papers



Dynamic Reservation Scheme of Physical Cell Identity for 3GPP LTE Femtocell Systems.
free download

Abstract: A large number of phone calls and data services will take place in indoor environments. In Long Term Evolution (LTE), femtocell, as a home base station for indoor coverage extension and wideband data service, has recently gained significant interests

Femtocell: opportunities and challenges of the home cellular base station for the 3g
free download

ABSTRACT As indoor use of mobile phones is growing, there is increasing interest in a reliable solution to enhance indoor communications which often suffer from high signal attenuation leading to unacceptable call quality. The appearance of the dual-mode

Analysis of cost structure and business model options for wireless access provisioning using femtocell solutions
free download

The last year Mobile Operators have successfully offered mobile broad band services based on USB dongles and competitive flat rate subscriptions. Both the numbers of users as well as the usage in terms of transferred number of Mbytes per user and month are

Development of an access mechanism for femtocell networks
free download

ABSTRACT Femtocell is a small cellular base station installed in offices and homes that can combine internet technologies and mobile within the home [1]. The two major limitations of wireless communication are range and capacity. Cellular service is far superior in areas of

Adaptive radio resource management for OFDMA-based macro-and femtocell networks
free download

Abstract User and cellular operator requirements and expectations have been continuously evolving, and consequently, advanced radio access technologies have emerged. The International Mobile Telecommunications-Advanced (IMT-Advanced) specifications for

Femtocell technologies for providing new services at home
free download

NTT DOCOMO has already developed and put into commercial service femtocell Base Transceiver Station equipment (femto BTS)* 1 [1] in 2007 in order to expand area coverage into places such as SOHO. This time, with the assumption of household installation and for

Femtocell Deployment in 3 rd Generation Networks
free download

Furthermore, it is shown how the femtocells do not cause serious problems to the macro network, on the contrary, by careful planning macro layer performance can even be enhanced. Nevertheless, everything can not be evaluated by simulations. Piloting is the

Mobility and femtocell discovery in 3G UMTS networks
free download

Abstract:Femtocells are low-power cellular base stations that are typically deployed indoors in residential, enterprise or hotspots settings. Femtocells operate on licensed spectrum and provide excellent user experience through better coverage for voice and

IMS Signalling in LTE-Based Femtocell Network
free download

Abstract:The IP Multimedia Subsystem functionality is designed to work on various wireless access technologies and in all network coverage such as macrocell, microcell and femtocell. This paper describes the study of IP Multimedia Subsystem signalling in

A Femtocell-based Testbed for Evaluating Future Cellular Networks
free download

Abstract This paper argues that the network community needs research testbeds for cellular wireless networks, and introduces a femtocell-based testbed, dubbed Cell-Lab, which is currently being developed for evaluating next-generation wireless network protocols. The

LTE femtocell roadmap from concept to reality
free download

Silicon provides the heartbeat of the LTE base station and for femtocell devices is both a critical challenge as well as an opportunity for differentiation. Similar to the 3G femtocell market, LTE femtocell silicon will need to evolve from a collection of distinct parts to an

Femtocell and Beacon Transmit Power Self-Calibration
free download

ABSTRACT Femtocell power calibration is one of the key techniques for managing interference between femtocells and macrocells due to their unplanned deployment and restricted access. To ensure robust performance, rather than using a fixed transmit (Tx)

BEP enhancement for semi-femtocell MIMO systems employing SC-QICs and OSTBCs
free download

Abstract:In mobile cellular networks, it is estimated that more than 60% of voice and data services occur indoors. Therefore, cellular network operators have shown an unprecedented interest in research on femtocell systems from various aspects to extend the indoor

Virtual-cell frequency reuse scheme to support seamless service in femtocell environments
free download

Abstract: Multiple access technologies based on Orthogonal Frequency Division Multiplexing (OFDM) yield evolutionary advantages for the next generation wireless communication systems. Wireless communication systems based on Orthogonal

Review of interference avoidance schemes in femtocell networks
free download

Femtocell is a solution to increase the system capacity and coverage to meet the high demand of the next generation of services on broadband wireless access. However, the deployment of a new femtocell layer may have an undesired impact on the performance of

Open Loop Sensor based System used for Mitigation of Cross-tier Interference in FemtocellNetworks
free download

Abstract:The paper is concerned with the study of the cross-tier interference between the femtocell and macrocell layers of a mobile communications network. The main point of interest is consisted by the interference generated by the femtocell to the macrocell user. A

3GPP LTE Femtocell Pros Cons
free download

Abstract This paper highlights brief on FEMTOCELL implementation. The Femtocell is the latest evolution of the mobile network base station. It is aimed at providing dedicated indoor coverage, bringing benefits of enhanced coverage and improved call quality and data

Cognitive interference management for autonomic femtocell networks
free download

ABSTRACT The femtocell concept is an emerging technology for deploying the next generation of the wireless networks, aiming at indoor coverage enhancement, increasing capacity, and offloading the overlay macrocell traffic. Nevertheless, one of the most critical

Energy Efficient Mobility Management for the Macrocell-Femtocell LTE Network
free download

The demand for higher data rates and improved energy-efficiency have motivated the deployment of short-range, low-cost, consumer-deployed cellular access points, referred to as femtocells [1]. Femtocells are consumer-deployed cellular access points, which

Return Of The Femtocell
free download

It was just last year that femtocells were being proclaimed a 2009 killer app, along with LTE and WiMAX. But what was once viewed as the next great thing has instead faced a tough road with more than a few large-scale deployments by major mobile operators being put

Femtocell Evolution: A Model of Market and Standards Cooperation
free download

Page 1. Femtocell Evolution: A Model of Market and Standards Cooperation Simon Saunders Femto Forum Chairman 1 Page 2. Overview About Femto Forum Femtocell motivations Early barriers to implementation Co-operation with 3GPP and other bodies on standards

Femtocell: Femtostep to the Holy Grail
free download

femtocell using it owning it abusing it and far beyond blind dating recovery to failure customizing web interface found while analyzing the images: credentials for web interface are in a local database the previously discovered interface is provided by the

Core Technologies for 4G: Femtocell
free download

Recently concluded study item within RAN3 (TR25. 820) recommending Iu as reference deployment option for the HNB. Home Access Point is a Work Item under the 3G LTE standards activities. Plenary meeting

Performance Analysis of an Energy Efficient Femtocell Network Using Queuing Theory
free download

ABSTRACT The energy expenditure of cellular networks is increasing rapidly due to high demand of data services by the subscribers. This subsequently gives rise to the CO2 emission which is a critical issue nowadays. A hybrid cellular network comprised of

Studying IMS Signalling in LTE-based Femtocell Network
free download

Abstract:Integrating femtocells with mobile networks is a challenging issue and different approaches have been proposed to achieve this convergence since the standard is still under development. One of these proposed methods is SIP/IMS-based integration. In this

Green femtocell based on uwb technologies
free download

The rapid evolution of mobile communications through four generations of mobile communication, envisages the operation at 100Mb/s for mobile users and at 1Gb/s for stationary applications in the near future. The tremendous increase of data rates must be

Decentralized Resource Allocation in Femtocell Networks Based on Game Theory and Markov Modeling
free download

Abstract The potential massive deployment of femto access points requires femtocell networks to be able to self-configure, with a special attention to interference management. Within this context, game theory represents a solid tool to devise decentralized algorithms

Interactions Study of Self Optimizing Schemes in LTE Femtocell Networks
free download

Abstract One of the enabling technologies for Long Term Evolution (LTE) deployments is the femtocell technology. By having femtocells deployed indoors and closer to the user, high data rate services can be provided efficiently. These femtocells are expected to be

Spectrum Sharing for Femtocell Networks
free download

Spectrum Sharing for Femtocell Networks Page 2. Introduction Femtocells: very small, short range, low cost and low power base Effects of fading 19 Page 20. Femtocell Networks: Spectrum Sharing vs. Spectrum Splitting Page 21.

Interference scenarios and capacity performances for femtocell networks
free download

Abstract In this paper, we present capacity performances of Femtocells considering different interference scenarios which are among femtocells and between femtocells and macrocell. The capacity performances are demonstrated for femtocells with both single and multiple

Handover Adaptations for Load Balancing Scheme in Macrocell/Femtocell LTE Network
free download

Abstract:In the purpose of offering extensively higher data rates, higher systems throughput and lower latency, the femtocell systems in 3GPP LTE system has premeditate. In a large number of femtocells, there are too many prehandover and unnecessary handover

Femtocell Suburban Deployment in LTE Networks
free download

Abstract:In this paper, the authors present a hybrid deployment model in order to investigate the path loss behavior of a LTE-femtocell in a residential suburban scenario. The proposed model places the femtocells in a fix grid to calculate path loss for each femtocell.

Performance Analysis of a Finite Capacity Femtocell Network
free download

ABSTRACT A feasible solution to wireless spectrum scarcity is the deployment of femtocells along with already existing or new macrocells. This hybrid architecture not only helps to increase the system capacity but also improves the wireless signal quality for indoor users

Performance Analysis Of Femtocell in an Indoor Cellular Network
free download

Abstract:This paper investigates the use of femtocell as a solution to improve indoor coverage and off-load mobile data indoors on the macro cellular networks. Specifically, the article deals with a performance analysis of femtocell in an indoor cellular network. This is

The Analysis of System Performance of An MC-CDMA System over Two-Tier FemtocellNetworks
free download

Abstract:The paper is analyzing the evaluation of system performance for an MC-CDMA (multi-carrier coded-division multiple-access) system operating over two-tier femtocell environment. The considered scenario is deployed with a macrocell site where is

Fractional Frequency Reuse in Integrated Femtocell/Macrocell Environments.
free download

Abstract. Femtocells have a strong potential for increasing the efficiency, cell coverage and network capacity of next-generation mobile networks. In Long Term Evolution technology, the adaptation of Fractional Frequency Reuse techniques has been proposed in order to

FEMTOCELL-A VEHICLE TO MOBILE COMMUNICATIONS
free download

ABSTRACT The popularity of mobile devices is growing at a feverish pace. The advent of smart phones and laptop data cards is the current driving force in mobile communications. Femtocell is a small, low-power cellular base station, typically designed for use in a home

1xEV-DO Femtocell Performance and Capacity Analysis
free download

ABSTRACT Femtocell is a miniature base station installed in subscriber's residence and office for providing cellular service within the local home/office environment. Femtocells extend the coverage of an operator's existing macro network and thereby improve a user's

Handover management scheme in LTE femtocell networks
free download

ABSTRACT Femtocell is a small cellular base station in home, a low-power wireless access point designed for use in residential or small business environment, this technology is a promising solution for operators to improve network performance, and the deployment of a

Parallel Measurement Method of System Information for 3GPP LTE Femtocell
free download

Abstract:In the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, User Equipments (UEs)target cells, if the target cells are Closed Subscriber Group (CSG) cells. Home evolved NodeB (HeNB) in

Reduction in number of active base Stations in femtocell networks using optimized heuristic algorithm
free download

Abstract:Reducing the energy consumption of cellular wireless access networks is not only necessary for the global environment but also makes commercial sense for telecommunication operators. Since access networks are designed to support peak time

Crystallized Rate Regions in MIMO Communications with the Presence of FemtocellInterferers
free download

Abstract:In this paper the application of the concept of crystallized rate regions to MIMO transmission with femtocell interference is investigated. Based on the referenced work a new game definition specifying the new cost function derived for MIMO transmission with

Hardware-efficient implementation of a Femtocell/Macrocell interference-mitigation technique for high-performance LTE-based systems
free download

ABSTRACT This paper presents the FPGA design of an interference aware digital front end tailored for heterogeneous multi-cell LTE-based systems. A resource-optimized RTL architecture has been implemented and validated under realistic operating conditions

A Survey on Power Control Techniques in Femtocell Networks
free download

Abstract:Rapid increase in mobile data has raised the stakes on developing innovative new technologies and cellular topologies that can meet these demands in an energy efficient manner. One of the most interesting trends that will emerge from this cellular

A Dual-Band Femtocell Framework for Utilizing Both Licensed and Unlicensed Bands
free download

Abstract To increase network capacity, cellular operators have been offloading macrocell traffic to small cells such as femtocells in the licensed band and WiFi hotspots in the unlicensed bands. However, there could be severe interference between macro and femto

Femtocell Deployment; Next Generation in Cellular Systems
free download



Security Analysis of Femtocell-Enabled Cellular Network Architecture
free download

Abstract Consumption of mobile data traffic has been growing exponentially due to the popularity of smartphones and tablets. As a result, mobile network operators have been facing challenges to provide needed capacity expansion in their congested network.

Correlation Phenomenon versus Beam-subset Scenario in MIMO-femtocell System with Fading Environments (on_line)
free download

ABSTRACT The channel correlation happens in a MIMO-femtocell (multiple-input multipleoutput) system with beam-subset beamforming technique is investigated in this paper. MIMO-femtocell system constructed with MIMO signaling that is adapted to a tiered

BER Performance of OFDM-IDMA Comparison to OFDM for Femtocell
free download

Abstract-In increase in system capacity and data rates can be achieved by getting the transmitter and receiver closer to each other. In wireless communication system, with the increase of data rate the distortion of the received signal caused by multipath fading

Femtocell Interference Alleviation using Cluster-based Frequency Reuse Technique
free download

ABSTRACT For satisfying the need of increasing number of users, their demands for the services and to provide enhanced indoor coverage, Long Term Evolution (LTE) has reveal small cellular base stations called Femtocells. These home base stations can dramatically

QoS Guarantees in Two-tier Cognitive Femtocell Networks
free download

Abstract:Cognitive radio (CR) networks have become a promising technology, where femtocell networks embedded in the coverage greatly benefits communication quality. Two- tier cognitive femtocell networks are deployed by network users in an indoor environment.

Opportunistic Resource Allocation in Cognitive Femtocell Networks
free download

Abstract In this paper, we develop an opportunistic scheduling policy for cognitive femtocell network that maximizes the throughput utility of femtocell users subject to maximum channels collision constraints. We consider a cognitive femtocell network with a subset

A Study on Resource Allocation with Optimized Quality Class Interfaces and Challenges in OFDMA-Femtocell Networks
free download

Abstract:Interference control and quality-of-service (QoS) awareness are the major challenges for resource management in orthogonal frequency-division multiple access femtocell networks now a days. Allocation of PRBs is of utmost importance for better

Distributed FFR as the Novelty Solution of the Integration Femtocell and Macrocell in Cellular Network
free download

Abstract:LTE-Advanced and Femtocell are deployed by cellular operators to improve the coverage and capacity to respond the demand for higher data rates in wireless networks. Integration of femtocell into cellular network faced interference between femtocell and

Seamless Handover for Integrated LTE Macrocell-Femtocell
free download

Abstract:Femtocells offer many advantages in wireless networks such as improved cell capacity and coverage in indoor and fringe areas. To achieve fair and efficient resource utilization between cross-tier users, hybrid access mode is proposed which enables

FEMTOCELL: A SURVEY ON DEVELOPMENT IN LTE NETWORK SYSTEM
free download

ABSTRACT Femtocell was announced as a solution to improve voice and data services in mobile network for indoor coverage and also outdoor scenarios with a very limited geographical coverage. Femtocell also helps in providing more capacity to fulfil the

Optimal Femto Placement in Enterprise Femtocell Networks
free download

Abstract:Targeting the indoor users, Femtocells are deployed inside the buildings to boost the signal strength and provide higher datarates. Femtos play an important role in 4G LTE standard and an optimal placement is of immense importance for realizing full benefits of

Frequency Reuse Schemes for Interference Management in LTE Femtocell Networks: Issues and Approaches
free download

Abstract:LTE networks are becoming more and more popular nowadays. There are two main problems in implementing LTE networks-coverage and capacity. Both these problems can be solved by deploying femtocells in LTE networks. Interference occurs between

Resource Allocation with QoS Supporting in Macro-Femtocell Networks
free download

Abstract The macro-femto overlaid LTE-Advanced networks have been drawing many attentions from mobile operators with their capability of extending coverages and supporting higher data rates. Effective and efficient resource allocation schemes must be preceded in

Femtocell Networks
free download

Abstract:In an effort to increase capacity and coverage in wireless communication cells, many cellular providers are turning to femtocells as a solution. Femtocells are small communication cells inlaid within a much larger macrocell; they are generally located near

A Low-Latency Handover Scheme for LTE-Femtocell Networks
free download

Abstract:Femtocells are small, inexpensive, low power cell sites, which are used to improve indoor capacity and coverage. They are generally consumer deployed and are connected to their own wired broadband backhaul connections. A large number of

Efficient SON Handover Scheme for Enterprise Femtocell Networks
free download

Abstract:4G Femtocell are used in indoor to improve the performance of the mobile users. In Enterprise buildings there is high deployment of femtocells. As UE keeps moving from place to place within the building, unnecessary handovers are seen prominently and

On the Security of a User Equipment Registration Procedure in Femtocell-Enabled Networks
free download

Abstract: Mobile data traffic has been growing at an increasing rate with the popularity of smartphones, tablets, and other wireless devices. To reduce the load on the network, mobile network operators deploy femtocells to increase their coverage and performance and to

GROUP HANDOVER MANAGEMENT IN MOBILE FEMTOCELL NETWORK BASED ON ART MAP CLASS1
free download

Abstract:In the telecommunication, a femtocell is small, low power cellular base station which always used in a home or small business. When we design the heterogeneous wireless environment then it involves several internetworking issues, such as seamless

Coverage/Outage Analysis of an Integrated Wi-Fi Meshed LTE Femtocell Network
free download

Abstract:The femtocell-Wi-Fi integration is a promising approach to solve the problem of inter-tier or intra-tier interference in heterogeneous networks. In this paper, multimode femtocell base stations are deployed which form a Wi-Fi mesh network to communicate

New Trends in Femtocell Backhaul Security
free download

Abstract. One of the relatively new services presented by mobile operators is a femtocell. A femtocell is a network located at the residential premises helping to extend the mobile signal to places which are difficult to cover. Furthermore, it enables the mobile operator to

A Review on Femtocell and its 3G and 4G Architectures
free download

Abstract:A femtocell is small private cell which acts as a base station and provides increased coverage and capacity in indoor area such as offices, home environment. Femtocell Network uses femtocell access point (FAP) and existing network for backhaul

Resource Constraint Impact Analysis in Closed Access Femtocell Networks
free download

Abstract:Femtocell technology is an attractive solution for high-quality wireless access indoor scenarios where conventional cellular system coverage is usually poor. Femtocells are generally overlaid upon the macrocell and share the same network resources as the

Femtocell-to-Femtocell Handoff Management in Dense Femtocellular Networks
free download

Abstract: Femtocells are small consumer-installed base stations that enhance indoor cellular services coverage. Deploying a large number of such femtocells in a small area results in Dense Femtocellular Networks. These networks face a number of problems, including

A Survey on Implementation and Design of Femtocell Device
free download

Abstract-The Femtocells design and implementation for deployment in subscriber homes are non-trivial. Femtocell promises improved indoor coverage and increased throughput for mobile data services while off-loading traffic from expensive macro radio networks onto

ANALYSIS OF FEMTOCELL
free download

Recently the communications market has been saturated, and the revenue of cellular operators has been declined. Furthermore a competition in the communications market is growing rapidly, and the diverse customer needs stimulate to develop new services.

Analysis of the competition between operators in a femtocell scenario (Document TELPOL73)
free download

This paper analyses the effect of the entry of a femtocell operator in a mobile commu- nications market where an macrocell operator exists. The analysis is conducted using a game theory based model. The problem is part of the implementation of the work programme financed by

Finite Capacity Energy Efficient Femtocell Network
free download

ABSTRACT This paper presents the performance analysis of a finite capacity energy efficient femtocell network. A FAP (Femtocell Access Point) provides continuous connectivity for M communicating nodes in this network. The data transmission from M communicating

Clustering Based Adaptive Power Control for Interference Mitigation in Two-Tier FemtocellNetworks.
free download

Abstract Two-tier femtocell networks, consisting of a conventional cellular network underlaid with femtocell hotspots, play an important role in the indoor coverage and capacity of cellular networks. However, the cross-and co-tier interference will cause an unacceptable quality

Femtocell-Energy Efficient Cellular Networks
free download

Abstract:Vast advances in the field of Information Communication and Technologies (ICT) has significantly increased the energy requirement. CO2 emissions adversely affected the atmosphere causing unanticipated changes. It is a major issue because we have very

Scheduling Algorithms Implemented For Resource Allocation in Ofdma-Femtocell Based Systems with QOS Constraints for CBR and VBR Data Transmission
free download

Abstract:In this work we consider the problem of resource allocation for proportional fairness of long term received rates of data users and quality of service for real time sessions in an OFDMA-Femtocells based system. The network allocates available subchannels

Monopole Antenna Array for Femtocell LTE
free download

Abstract:In this paper, a four element coplanar waveguide fed monopole antenna which is arrayed as volume array antenna to obtain omnidirectional pattern is presented. This femtocell antenna is designed to work at frequency 2.3-2.5 GHz for VSWR 2 and have at

Analysing Energy Efficiency of Cell Selection Schemes for Femtocell Networks with Limited Backhaul Capacity
free download

Abstract:Demands of mobile data is ever increasing. To handle these demands operators have to deploy additional base stations such as microcell, picocells and femtocells. Deployment of these low power base stations not only improves network capacity but also

Hybrid Cognitive Approach for Femtocell Interference Mitigation
free download

Abstract:In this paper, we introduce new concept for femtocells with the purpose to minimize cross-tier interference to the macrocell users (MUEs). The cross-tier interference is mitigated by the power control algorithm minimizing the power level and, thus, ensuring

Indoor-to-Outdoor Measurement Campaign for the Development of a Propagation Model forFemtocell Environments
free download

Abstract:To encounter the increasing traffic demand in future mobile communication networks [1] the mobile network operators will introduce small cells to the networks. These cells will cover small areas mainly inside of buildings to deliver services to indoor users.

Optimization Handoff in Mobility Management for the Integrated Macrocell-Femtocell LTE Network
free download

Macrocell Femtocell LTE Network Mobility Management has key challenges Femtocell characterization / identification, Access Control, Network Discovery, Handover decision and Handover execution where going to focus on Handover.

FEMTOCELL TECHNOLOGY
free download

ABSTRACT: This is a survey paper on the recently developed and rapidly evolving field of femtocells. Quite often, it is noticed that cell-phone signals are strongly attenuated, when indoors, leading to call dropping or poor call quality. Femtocells are mini base stations that

Interference Aware SINR Estimation in Femtocell Networks
free download

Abstract: In wireless communication two main limitations are capacity and range. In the areas of high population density cellular service is far superior compared to scarcely populated areas. The initial cellular systems were designed for a single application, that is

Low Complex Energy-Efficient Resource Allocation in Femtocell Networks
free download

Abstract:Femtocells have attracted growing attention in academia, industry, and standardization forums in recent years. However, most of existing works on femtocell networks are focused on spectrum efficiency and interference mitigation, energy efficiency

LTE FEMTOCELL CHANNEL ASSIGNMENT USING FREQUENCY TIME HOPPING
free download

Abstract:Femtocell deployment concept over a microcell has attracted tremendous attention in both industrial and academic environments. Femtocells face several challenges, one of these challenges is the interference mitigation between neighbouring femtocells

Interference Management in Femtocell Networks using Power Control
free download

Abstract:Interference is the result of superimposing of two or more signals that causes change in original signal properties. Interference in wireless networks is of major concern these days. Many interference control algorithms have been proposed to overcome the

Dualband Monopole antenna for LTE Femtocell Base Station
free download

LTE femtocell base station is proposed. The proposed antenna consists of rectangular loop ground and a stepped monopole radiator. By varying the geometry of loop ground and stepped monopole radiator, a dual broadband characteristic is observed. The dual broad

Impact of Interferences in Co-Operative Femtocell Networks
free download

Abstract: With the advent of newer cellular standards like LTE, users expect not only good quality of voice but also many other features such as uninterrupted voice calls, clear video images at much faster data speed. More than 50% of voice calls and more than 70% of

Energy-Efficient Mobility Management for the Integrated Macrocell-Femtocell LTE Network
free download

http:\\camad2012.av.it.pt Page 15. 15 Femtocell Key Features Short-range, low-cost cellular access points installed by the consumer Utilize the consumer's broadband backhaul to Page 16. 16 Femtocell Key Features Page 17. 17 Femtocell Key Features Mobile

Performance Analysis of Handover Strategy in Femtocell Network
free download

Abstract: Femtocells, as known as HeNB is the tremendous network technology in the Long Term Evolution (LTE) network in order to fulfill the upcoming demand of high data rates. However, Femtocells deployment may cause the incidence of frequent and

Femtocell Macrocell MIMO Heterogeneous Pathloss Shadowing
free download

Abstract This paper considers downlink interference mitigation for two-tier cellular systems using Interference Alignment (IA). In order to manage both the co-tier and cross-tier interference in MIMO femtocell and macrocell networks, we have proposed modeling such

SSR Improvement in OFDMA Femtocell Networks
free download

Abstract: To enhance indoor coverage and capacity of fourth generation cellular networks femtocells are introduced. These are the small cellular base station installed in a home or buildings. Femtocells are deployed in the existing macrocell networks. Both uses same

Frequency Collision Elimination Method Based on Negotiation and Non-Cooperative Game inFemtocell Networks
free download

Abstract:In the user deployed femtocell networks, the frequency collision dramatically decreases the throughput of femtocell networks. In this paper, we propose a frequency collision elimination method based on negotiation and noncooperative game to avoid

An Introduction to Femtocell
free download

Wireless Network Lab, NCTU, Taiwan 1 An Introduction to Femtocell Jane-Hwa Huang Department of Communications Engineering National Chiao Tung University Page 4. 4 Broadband Femtocell: PHY/MAC Layer Issues Two main problems to achieve broadband femtocell:

W-CDMA/LTE dual-mode Ultra-compact Base Station (Xi Femtocell)
free download

In recent years, the spread of smartphones and the expansion of rich multimedia content such as video have led to pressing demands to increase the capacity of mobile networks. To meet these demands, NTT DOCOMO began its Xi(crossy) service in December 2010,

An approach for analysis the impact of LTE-based femtocell network-Case study based on discrete simulation
free download

Abstract-As in any network, LTE (Long Term Evolution) also has a concern with respect to coverage and data rate. A key element in LTE is the deployment of multiple femtocells in order to improve both coverage and data rate. Naturally, one has to remember that

Femtocell-Macrocell Two Tier
free download

Abstract Femtocells have been considered as a promising technology to provide better indoor coverage and spatial reuse gains in the last few years. Additionally, it can be employed in mobile data offloading scenarios in order to decrease the overburden

Comparison of Efficient Handoff from Macro to femtocell using Different algorithms
free download

Abstract: Handoff algorithm decides the connection to user with system while minimizing latency and no. of handoff needed. In this paper the RSS based handoff decision algothim is proposed. This algorithm results in multiply the values of RSS by some constant which

A Soft Computing System for Resource Management of Femtocell Networks
free download

Abstract:Femtocell is a small cellular base station, typically designed for use in a home or small business. With a Public access to Femtocell system, a large number of public users will migrate to the Femtocell network, whenever they enter the Femtocell coverage area.

Brief Overview on Femtocell Architecture its Threats
free download

In cellular world new technology is being adopted namely Femtocell for simplification of network architecture to provide better coverage and increase performance. Femtocell is a small seamless integrated base station which is to be installed on user premises in order

A Scalable and Self-Sustained Femtocell Architecture for LTE-A
free download

Abstract The continuously growing number of mobile devices in terms of hardware and applications augments the necessity for higher data rates and a larger capacity in wireless communication networks. The Long Term Evolution-Advanced (LTE-A) standard was

Interference Alignment with Limited Feedback for Macrocell-Femtocell Heterogeneous Networks
free download

Abstract:Interference Alignment (IA) emerged on the communication scene as a solution to the interference problem in all interference-limited networks, including heterogeneous cellular systems. However, the performance of IA is greatly related to the accuracy of the

A CAMPUS FEMTOCELL NETWORK PLAN DESIGN
free download

ABSTRACT This paper for Telecommunications Systems Design addresses the conceptual aspects of a FemtoCell Network Design for a Campus Building such as the Chamber of Mine Building on the West Campus of The University of the Witwatersrand and a Campus

Improving Energy Efficiency of Femtocell Network
free download

Abstract:Femtocells are small base stations designed for use as an ideal solution to ensure good radio coverage in the residential and corporate environments. In this paper we review LTE femtocell, LTE HeNB standard architecture and we detail our proposed architecture. It

Resource Allocation for Femtocell Networks by Using Chance-Constrained Optimization
free download

Abstract:Deploying femtocells underlaying macrocells is a promising way to improve the capacity and enhance the coverage of a cellular system. However, such a heterogeneous network also gives rise to cross-tier and intra-tier interference issue that should be

A Pre-Fetch Based Fast Handover Scheme for Femtocell Networks
free download

Abstract-Mobility is the most important feature of a wireless cellular communication system. Usually, continuous service is achieved by supporting handover from one base station to another. The legacy handover procedure is designed for handover between macrocell

Power Consumption Analysis in Femtocell Networks
free download

Abstract:In this paper, the power consumption in a femtocell base station network is investigated using optimized heuristic algorithm and is compared with power consumption using heuristic algorithm for various bit rates, different user density, different base station

Distributed Dynamic-TDD Resource Allocation in Femtocell Networks Using Evolutionary Game
free download

Abstract:Since uplink (UL) and downlink (DL) traffic loads are time-variant in femtocells, it is essential to adopt dynamic time-division duplexing (TDD) to effectively adjust the uplink and downlink transmission resources. However, the cross-link interference between

Base Station Selection in Open Access Femtocell Networks Based on Bat Algorithm
free download

Abstract:In two-tier femtocell networks with open access deployment, a mobile user equipment (MUE) have to connect to the most appropriate base station in order to improve its performance. In this paper, the base station selection in open access femtocell

Mobile Data Offloading Using Femtocell
free download

Abstract:Developing smart devices and tremendous use of social networking sites has raised a problem of data traffic. To mitigate this issue femtocell are expected in indoor environment. In this paper we have explained data offloading using femtocell via Wi-Fi (

Femtocell Technology: Opportunities for SDR
free download

Abstract:We introduce the concept of using femtocell (small cell base station) technology to address software defined radio (SDR) applications. We present a list of our requirements for such technology for its effective use in compact SDR units. We provide an overview of the

Utility-based power control for interference mitigation in a mixed femtocell-macrocell environment
free download

Abstract:Femtocell networks are about to be deployed for the improvements in the cellular coverage and capacity. However, this deployment is non trivial (mainly) because of the extra interference that they cause to the macrocell users that share the same portion of the

Economic Value of Femtocell Networks for Mobile Solution
free download

Abstract-The indoor deployment of femtocell networks for the purpose of voice calls, data usage, mobile media, internet access and security service has varying economic implications for the Telecom providers. Furthermore, femtocell works in the same

Evaluation of Femtocell Technology Challenges and Its Power Control Methodologies for Green Heterogeneous Networks
free download

Abstract: Femtocell technology brings extended low-power radio coverage directly in the indoor premises, where propagation loss is typically highest. It also enriches both macrocell wide-area and in-building solutions in terms of coverage capacity. The integration of

Efficient Measurement Procedure for Access Control to Maximizing Throughput in LTEFemtocell Networks
free download

Abstract-LTE networks are becoming more and more popular nowadays. There are two main problems in implementing LTE networks-coverage and capacity. Both these problems can be solved by deploying femtocells in LTE networks. Femtocells can enhance the

Femtocell Networks
free download

A two-tier UMTS network is considered where a large number of randomly deployed Wideband Code Division Multiple Access (WCDMA) femtocells are laid under macrocells where the spectrum is shared. The cochannel interference between the cells may be a

Decentralized spectrum sharing with beamforming in two-tier femtocell networks
free download

Abstract:Two-tier overlay networks that consist of a conventional macrocell network and femtocell hotspots offer an economical solution for high capacity and extended coverage. However, wireless interference across tiers significantly degrades network performance

QoS Priority Based Femtocell User Power Control for Interference Mitigation in 3GPP LTE-A HetNet
free download

ABSTRACT In recent years, development of femtocells are receiving considerable attention towards increasing the network coverage, capacity, and improvement in the quality of service for users. In 3GPP LTE-Advanced (LTE-A) system, to efficiently utilize the

An Efficient Spectrum Allocation Scheme for OFDMA Femtocell Networks
free download

Abstract:This paper presents an adaptive spectrum allocation scheme to mitigate the co- channel interference for two-tier OFDMA networks. The proposed allocation scheme utilizes a dynamic orthogonal spectrum sharing between macrocell and femtocell to reduce the

Energy-efficient Femtocell Placement in LTE Networks
free download

Abstract:To enhance battery life of the user equipment and increase the data rates for indoor users in LTE network, low power nodes like Femtos are deployed in enterprise buildings. But the optimal placement of Femtos is a challenging task due to heterogeneity


FREE ENGINEERING RESEARCH PAPERS