Ghent University

Displaying 1-40 of 120 results

  • White Papers // Feb 2014

    BarrierPoint: Sampled Simulation of Multi-Threaded Applications

    Sampling is a well-known technique to speed up architectural simulation of long-running workloads while maintaining accurate performance predictions. A number of sampling techniques have recently been developed that extend well-known single-threaded techniques to allow sampled simulation of multi-threaded applications. Unfortunately, prior work is limited to non-synchronizing applications (e.g., server throughput...

    Provided By Ghent University

  • White Papers // Jan 2014

    Undersubscribed Threading on Clustered Cache Architectures

    Recent many-core processors such as Intel's Xeon Phi and GPGPUs specialize in running highly scalable parallel applications at high performance while simultaneously embracing energy efficiency as a first-order design constraint. The traditional belief is that full utilization of all available cores also translates into the highest possible performance. In this...

    Provided By Ghent University

  • White Papers // Jan 2014

    Studying Compiler Optimizations on Superscalar Processors Through Interval Analysis

    Understanding the performance impact of compiler optimizations on superscalar processors is complicated because compiler optimizations interact with the micro-architecture in complex ways. This paper analyzes this interaction using interval analysis, an analytical processor model that allows for breaking total execution time into cycle components. By studying the impact of compiler...

    Provided By Ghent University

  • White Papers // Jan 2014

    Statistical Simulation of Chip Multiprocessors Running Multi-Program Workloads

    In this paper, the authors explore statistical simulation as a fast simulation technique for driving Chip Multi-Processor (CMP) design space exploration. The idea of statistical simulation is to measure a number of important program execution characteristics, generate a synthetic trace, and simulate that synthetic trace. The important benefit is that...

    Provided By Ghent University

  • White Papers // Jan 2014

    Workload Design: Selecting Representative Program-Input Pairs

    Having a representative workload of the target domain of a microprocessor is extremely important throughout its design. The composition of a workload involves two issues: which benchmarks to select and which input data sets to select per benchmark. Unfortunately, it is impossible to select a huge number of benchmarks and...

    Provided By Ghent University

  • White Papers // Sep 2013

    Self-Sustaining Platforms: A Semantic Workflow Engine

    In this paper, the authors provide a novel semantic workflow system, based on semantic functional service descriptions and a rule file. The workflow engine follows a three-step process. First, it determines for all the resources in its knowledge base the functionality they need to progress in the workflow. This uses...

    Provided By Ghent University

  • White Papers // Aug 2013

    Extending R2RML to a Source-Independent Mapping Language for RDF

    Although reaching the fifth star of the open data deployment scheme demands the data to be represented in RDF and linked, a generic and standard mapping procedure to deploy raw data in RDF was not established so far. Only the R2RML mapping language was standardized but its applicability is limited...

    Provided By Ghent University

  • White Papers // Jul 2013

    Does IT Matter for Business Process Maturity? A Comparative Study on Business Process Maturity Models

    This paper recalls the business process discussion between Carr, who stated that IT does not matter, and Smith and Finger, who proclaimed the opposite. In the end, both visions agreed that IT (or process deployment) counts, but must follow the business strategy (or process modeling). The present paper broadens the...

    Provided By Ghent University

  • White Papers // Jul 2013

    Fairness-Aware Scheduling on Single-ISA Heterogeneous Multi-Cores

    Single-ISA heterogeneous multi-cores consisting of small and big cores dramatically improve energy- and power-efficiency by scheduling workloads on the most appropriate core type. A significant body of recent work has focused on improving system throughput through scheduling. However, none of the prior work has looked into fairness. Yet, guaranteeing that...

    Provided By Ghent University

  • White Papers // May 2013

    Anycast End-to-end Resilience for Cloud Services over Virtual Optical Networks

    Optical networks are crucial to support increasingly demanding cloud services. Delivering the requested quality of service is key to successfully provisioning end-to-end services in clouds. Therefore, as for traditional optical network services, it is of utter importance to guarantee that clouds are resilient to any failure of either network infrastructure...

    Provided By Ghent University

  • White Papers // May 2013

    Enterprise Architecture Software Tool Support for Small and Medium-Sized Enterprises: EASE

    In the current information society increased attention is being paid to Enterprise Architecture (EA) and accompanying techniques, models and frameworks. CHOOSE is an EA approach focused on and adapted to the characteristics and needs of Small and Medium-sized Enterprises (SMEs). Though these techniques could offer significant benefits to SMEs, hardly...

    Provided By Ghent University

  • White Papers // May 2013

    Current Pitfalls of Business Process Maturity Models: A Selection Perspective

    Business process management is in high demand, but organisations are still struggling to realize it properly. Hence, maturity models have been developed to support the gradual adoption, use and organisational consequences of business process management, and this for both specific business processes and for the whole process portfolio of an...

    Provided By Ghent University

  • White Papers // Apr 2013

    Towards an Integrative Component Framework for Business Models: Identifying the Common Elements Between the Current Business Model Views

    The business model literature has surged since the beginning of this millennium, but is currently characterized by a lack of shared understanding of the concept. This lack of consensus inhibits the effective use of business models for achieving business-IT alignment, which includes both formulating the appropriate Information System (IS) requirements...

    Provided By Ghent University

  • White Papers // Apr 2013

    Restating the Case for Weighted-IPC Metrics to Evaluate Multiprogram Workload Performance

    Metrics for evaluating the performance of multi-program workloads on multicore or multithreaded processors have been subject of a long and still lasting debate. Early studies used the sum of the IPCs of each program, but the researchers argued that this metric favors high-IPC programs and proposed weighted speedup instead. Later,...

    Provided By Ghent University

  • White Papers // Apr 2013

    Development of Software Tool Support for Enterprise Architecture in Small and Medium-Sized Enterprises

    Throughout recent years a lot of research has been done to develop Enterprise Architecture (EA) approaches for large and complex enterprises. Consequently, an array of tools has been developed for these large enterprises to aid in EA management. However, traditional Small and Medium-sized Enterprises (SMEs), which are very important for...

    Provided By Ghent University

  • White Papers // Apr 2013

    The FASTER Vision for Designing Dynamically Reconfigurable Systems

    Extending product functionality and lifetime requires constant addition of new features to satisfy the growing customer needs and the evolving market and technology trends. Software component adaptivity is straightforward but not enough: recent products include hardware accelerators for reasons of performance and power efficiency that also need to adapt to...

    Provided By Ghent University

  • White Papers // Feb 2013

    Scheduling Heterogeneous Multi-Cores Through Performance Impact Estimation (PIE)

    Single-ISA heterogeneous multi-core processors are typically composed of small power-efficient cores and big high-performance cores. The effectiveness of heterogeneous multi-cores depends on how well a scheduler can map workloads onto the most appropriate core type. In general, small cores can achieve good performance if the workload inherently has high levels...

    Provided By Ghent University

  • White Papers // Feb 2013

    Sampled Simulation of Multi-Threaded Applications

    Sampling is a well-known workload reduction technique that allows one to speed up architectural simulation while accurately predicting performance. Previous sampling methods have been shown to accurately predict single-threaded application runtime based on its overall IPC. However, these previous approaches are unsuitable for general multi-threaded applications, for which IPC is...

    Provided By Ghent University

  • White Papers // Feb 2013

    Towards a Formal Framework for Business Models: Identifying and Visualizing the Common Elements Between the Current Business Model Views

    The importance of the business model concept has been risen since the emergence of e-business companies in the beginning of this millennium, who used it as an instrument to convince potential investors of their promising future. However, the underlying economic concepts have a broader applicability as the business model concept...

    Provided By Ghent University

  • White Papers // Dec 2012

    Platform for Real-Time Subjective Assessment of Interactive Multimedia Applications

    With the advent of cloud computing and remote execution of interactive applications, there is a need for evaluating the Quality of Experience (QoE) and the influence on this QoE of network condition variations, media encoding parameter settings and related optimization algorithms. However, current QoE assessment focuses mainly on audiovisual quality...

    Provided By Ghent University

  • White Papers // Oct 2012

    Novel Design Methods and a Tool Flow for Unleashing Dynamic Reconfiguration

    During the last few years, there is an increasing interest in mixing software and hardware to serve efficiently different applications. This is due to the heterogeneity characterizing the tasks of an application which require the presence of resources from worlds, software and hardware. Controlling effectively these resources through an integrated...

    Provided By Ghent University

  • White Papers // Jul 2012

    DYAMAND: DYnamic, Adaptive MAnagement of Networks and Devices

    Consumer devices increasingly are "Smart" and hence offer services that can interwork with and/or be controlled by others. However, the full exploitation of the inherent opportunities this offers, is hurdled by a number of potential limitations. The interface towards the device might be vendor and even device specific, implying that...

    Provided By Ghent University

  • White Papers // Jun 2012

    Enterprise Architecture for Small and Medium Sized Enterprises

    Enterprise Architecture (EA) is used as a holistic approach to keep things aligned in a company. Some emphasize the use of EA to align IT with the business; others see it broader and use it to also keep the processes aligned with the strategy. Although a lot of research is...

    Provided By Ghent University

  • White Papers // Jun 2012

    Smart Technologies for Effective Reconfiguration: The FASTER approach

    Current and future computing systems increasingly require that their functionality stays flexible after the system is operational, in order to cope with changing user requirements and improvements in system features, i.e. changing protocols and data-coding standards, evolving demands for support of different user applications, and newly emerging applications in communication,...

    Provided By Ghent University

  • White Papers // May 2012

    On the Redundant Carrier Distribution for UW-OFDM

    Unique Word (UW) OFDM is a new multicarrier technique that was first introduced in. In this technique, the guard interval is a part of the Inverse FFT (IFFT) output, and is filled with known symbols. To be able to construct - by using an IFFT - a time domain signal...

    Provided By Ghent University

  • White Papers // Apr 2012

    A First-Order Mechanistic Model for Architectural Vulnerability Factor

    Soft error reliability has become a first-order design criterion for modern microprocessors. Architectural Vulnerability Factor (AVF) modeling is often used to capture the probability that a radiation-induced fault in a hardware structure will manifest as an error at the program output. AVF estimation requires detailed microarchitectural simulations which are time-consuming...

    Provided By Ghent University

  • White Papers // Mar 2012

    Pilot-Based ML Estimation in Amplify-and-Forward Cooperative Networks

    Cooperative communication is a promising technique that achieves spatial diversity without requiring multi-antenna receivers. In this paper, the authors consider the cooperative Amplify-and-Forward protocol and assume the channel realizations to be unknown. They study several pilot-based channel estimation strategies at the relay and the destination. The obtained maximum-likelihood estimators are...

    Provided By Ghent University

  • White Papers // Feb 2012

    Automatic Fine-Grained Area Detection for Thin Client Systems

    The widespread availability of cloud infrastructures is fueling new interest in the thin client computing paradigm. However, current thin client protocols are not designed to handle new content types as often encountered in state-of-the-art applications (e.g. multimedia editing, gaming, multimedia playback). Conveying this content using traditional thin client protocols typically...

    Provided By Ghent University

  • White Papers // Feb 2012

    A Mechanistic Performance Model for Superscalar In-Order Processors

    Mechanistic processor performance modeling builds an analytical model from understanding the underlying mechanisms in the processor and provides fundamental insight in program-microarchitecture interactions, as well as microarchitecture structure scaling trends and interactions. Whereas prior work in mechanistic performance modeling focused on superscalar out-of-order processors, this paper presents a mechanistic performance...

    Provided By Ghent University

  • White Papers // Jan 2012

    Speedup Stacks: Identifying Scaling Bottlenecks in Multi-Threaded Applications

    Multi-threaded workloads typically show sublinear speedup on multi-core hardware, i.e., the achieved speedup is not proportional to the number of cores and threads. Sublinear scaling may have multiple causes, such as poorly scalable synchronization leading to spinning and/or yielding, and interference in shared resources such as the Last Level Cache...

    Provided By Ghent University

  • White Papers // Jan 2012

    Resilient Network Dimensioning for Optical Grid/clouds Using Relocation

    In this paper, the authors address the problem of dimensioning infrastructure, comprising both network and server resources, for large-scale decentralized distributed systems such as grids or clouds. They will provide an overview of their work in this area, and in particular focus on how to design the resulting grid/cloud to...

    Provided By Ghent University

  • White Papers // Jan 2012

    Distributed Multi-Agent Algorithm for Residential Energy Management in Smart Grids

    Distributed renewable power generators, such as solar cells and wind turbines are difficult to predict, making the demand-supply problem more complex than in the traditional energy production scenario. They also introduce bidirectional energy flows in the low-voltage power grid, possibly causing voltage violations and grid instabilities. In this paper, the...

    Provided By Ghent University

  • White Papers // Dec 2011

    Design and Evaluation of an Architecture for Future Smart Grid Service Provisioning

    The current Internet evolves to a true Internet of Things where a plethora of heterogeneous devices are connected, communicate with each other and allow the deployment of new intelligent services, creating new ecosystems in diverse domains. One such a domain is the power grid. The increase of distributed renewable electricity...

    Provided By Ghent University

  • White Papers // Dec 2011

    Suitability of the Wireless Testbed W-ILab.t for VANET Research

    Two quite different tools are normally used in the research of Vehicular Ad Hoc NETworks (VANET). Simulators are practical and cost-efficient, but are not entirely accurate representations of the real life situation. Field Operational Tests (FOT) provide exactly the opposite characteristics. A wireless testbed is situated somewhere in between, but...

    Provided By Ghent University

  • White Papers // Dec 2011

    Benchmarking for Wireless Sensor Networks

    While the number of Wireless Sensor Network (WSN) protocols steadily increases, the evaluation methods have largely remained the same. Although experimentally supported research is gaining popularity, protocol evaluation and comparison remains difficult due to a lack of performance analysis methodologies. This paper introduces a wireless-benchmarking workflow that is designed to...

    Provided By Ghent University

  • White Papers // Nov 2011

    Model for Power Consumption of Wireless Access Networks

    The power consumption of wireless access networks will become an important issue in the coming years. In this paper, the power consumption of base stations for mobile WiMAX, fixed WiMAX, UMTS, HSPA, and LTE is modeled and related to the coverage. A new metric, the power consumption per covered area...

    Provided By Ghent University

  • White Papers // Oct 2011

    Improving Energy Efficiency in Optical Cloud Networks by Exploiting Anycast Routing

    Exploiting anycast routing significantly reduces optical network and server energy usage. In this paper, the authors present a case study showing that intelligently selecting destinations and routes thereto, while switching off unused (network) elements, cuts power consumption by around 20% and saves network resources by 29%. Motivated by the fact...

    Provided By Ghent University

  • White Papers // Oct 2011

    Municipal Support of Wireless Access Network Rollout : A Game Theoretic Approach

    Next generation access networks are expected to bring ubiquitous broadband access and have attracted interest of municipal governments. This paper investigates the support by municipal authorities for the rollout of such a city-wide wireless broadband access network. Different business cases for 3G and WiFi operators are developed and it is...

    Provided By Ghent University

  • White Papers // Oct 2011

    Isolation and Resource Efficiency of Virtual Optical Networks

    Virtualization of optical networking infrastructure is considered a fundamental technology in the future Internet. A key principle is that virtual networks are isolated to coexist on a shared physical substrate without interference. Although, a very attractive proposition for virtual network operators and users, in this paper, the authors demonstrate that...

    Provided By Ghent University

  • White Papers // Sep 2011

    Questioning the Design of Business Process Maturity Models

    The importance of business process management goes without saying. As its realization is less straightforward, maturity models have been developed to gradually assess and improve business processes. Although their aim is to assist organizations, the proliferation of maturity models also confuses organizations. They have no overview of existing models and...

    Provided By Ghent University

  • White Papers // Apr 2010

    Performance Metrics for Consolidated Servers

    As one enters the multi-core era where contemporary processors integrate multiple processor cores on a single chip and Simultaneous Multi-Threading (SMT), or running multiple hardware threads on a single core has become commonplace, benchmarking consolidated servers that run multiple guest VMs on the same physical hardware continues to remain a...

    Provided By Ghent University

  • White Papers // Jan 2010

    FPGA-Aware Garbage Collection in Java

    During codesign of a system, one still runs into the impedance mismatch between the software and hardware worlds. This paper identies the different levels of abstraction of hardware and software as a major culprit of this mismatch. For example, when programming in high-level object-oriented languages like Java, one has disposal...

    Provided By Ghent University

  • White Papers // Jul 2009

    Impact Of IPSAS On Reforming Governmental Financial Information Systems: A Comparative Study

    The diversity in reformed governmental financial information systems created a need for harmonized international accounting standards, resulting in the elaboration of the IPSAS (International Public Sector Accounting Standards). By means of a survey to experts this study examines the extent to which governments in Europe adopt IPSAS-inspired accrual accounting and...

    Provided By Ghent University

  • White Papers // Feb 2007

    Corporate Governance And Board Effectiveness: Beyond Formalism

    Mainstream research on boards of directors has been focusing on a direct relationship between board characteristics and firm performance, but up till now the results are inconclusive. Different reasons are put forward to explain this inconsistency, but it can be argued that 'traditional' board research has been neglecting potential intervening...

    Provided By Ghent University

  • White Papers // Nov 2010

    The Threat Of Monitoring Job Search. A Discontinuity Design

    Since July 2004 the job search effort of long-term unemployed benefit claimants is monitored in Belgium. The authors exploit the discontinuity in the treatment assignment at the age of 30 to evaluate the effect of a notification sent at least 8 months before job search is verified. The threat of...

    Provided By Ghent University

  • White Papers // Sep 2010

    The Effectiveness Of Tax Incentives In Attracting FDI: Evidence From The Tourism Sector In The Caribbean

    The authors investigate to what extend tax incentives have been effective in attracting Foreign Direct Investment in the tourism sector in the Caribbean in the period 1997-2007. More precisely, they test whether the neoclassical investment theory prediction that tax incentives, by lowering the user cost of capital, raise investment, holds...

    Provided By Ghent University

  • White Papers // Feb 2010

    Firm Valuation In Venture Capital Financing Rounds: The Role Of Investor Bargaining Power

    This paper explores the impact of bargaining power of Venture Capital (VC) firms on the valuation of their portfolio companies. The authors argue that VC firm types with greater bargaining power vis-?-vis the entrepreneur negotiate lower valuations compared to VC firm types with less bargaining power. They find that VC...

    Provided By Ghent University

  • White Papers // Jan 2010

    Corporate Governance In The Debate On CSR And Ethics: Sensemaking Of Social Issues In Management By Authorities And CEOs

    This study set out to uncover how opinion leaders, i.e. CEOs and governance authorities in the domain of social issues, understand and differentiate the various concepts pertaining to corporate governance, CSR and business ethics. The present study is the first to integrate corporate governance into a study of perceptions of...

    Provided By Ghent University

  • White Papers // Dec 2009

    First-Round Valuation Of Angel-backed Companies: The Role Of Investor Human Capital

    This paper investigates how angel investors' human capital affects the valuation of their portfolio companies at initial investment, based on the pre-money valuation of 59 investments in young Belgian companies. The authors show that entrepreneurs are able to negotiate higher valuations with angel investors who have a business degree, more...

    Provided By Ghent University

  • White Papers // Dec 2009

    Measuring Job Quality And Job Satisfaction

    Job quality is a multi-dimensional concept that has become prominent on the agenda of policy-makers. There is no consensus about how to measure and how to monitor it. In this paper the authors compare often used objective and subjective indicators of job quality. They argue that objective indicators are 'Too...

    Provided By Ghent University

  • White Papers // Aug 2009

    Optimal Monetary Policy And Firm Entry

    This paper characterizes optimal short-run monetary policy in an economy with monopolistic competition, endogenous firm entry, a cash-in-advance constraint and preset wages. Firms must make profits to cover entry costs; thus the markup on goods prices is efficient. However, a distortion results from the absence of a markup on leisure....

    Provided By Ghent University

  • White Papers // Sep 2010

    Fiscal Policy, Employment By Age, And Growth In OECD Economies

    The authors build and parameterize a general equilibrium OLG model for an open economy to jointly study hours of work of young, middle aged and older individuals, education of the young, and aggregate per capita growth. The composition of taxes and government expenditures plays a crucial role in their model....

    Provided By Ghent University

  • White Papers // Aug 2009

    Architecture and Scalable Testbed for Cooperative Systems in the Nextgenits Project

    In the past research has been done on cooperative systems resulting in, among others, the CALM architecture which is used in NextGenITS. The paper focuses on the scalability issues of routing protocols and energy optimizations for cooperative Vehicular Ad hoc NETwork (VANET) systems. The resulting solutions will be simulated using...

    Provided By Ghent University

  • White Papers // Jun 2010

    Design of Diversity-Achieving LDPC Codes for H-ARQ With Cross-Packet Channel Coding

    In wireless scenarios an effective protocol to increase the reliability for time-varying channels is the Hybrid Automatic Repeat reQuest (H-ARQ). The H-ARQ scheme with Cross-Packet channel Coding (CPC) is a recently published extension of H-ARQ with several advantages. No full-diversity Low-Density Parity-Check (LDPC) code design for the whole range of...

    Provided By Ghent University

  • White Papers // Apr 2011

    Design of Energy Efficient Topologies for Wireless On-Body Channel

    Advanced applications in the area of remote health monitoring can be realized by Wireless Body Area Networks (WBANs). This paper investigates the physical propagation channel at 2.45 GHz near real humans and presents an application for cross-layer design in order to optimize the energy consumption of single-hop and multi-hop network...

    Provided By Ghent University

  • White Papers // Sep 2010

    Why Lower Tax Rates May Be Ineffective To Encourage Investment: The Role Of The Investment Climate

    In this paper, the authors first analyze theoretically how the investment climate can affect the impact of corporate taxation on investment in a simple tax competition model where the corporate tax revenues are used to improve the investment climate. They find that an improvement of the investment climate increases the...

    Provided By Ghent University

  • White Papers // Mar 2010

    Cost Comparison of Different Translucent Optical Network Architectures

    Ever-increasing bandwidth demands and higher flexibility are the main challenges for the next generation optical core networks. A new trend in order to address these challenges is to consider the impairments of the lightpaths during the design of optical networks. In the work, the authors focus on translucent optical networks,...

    Provided By Ghent University

  • White Papers // Sep 2011

    Efficient Runtime Service Discovery and Consumption With Hyperlinked RESTdesc

    Hyperlinks and forms let humans navigate with ease through websites they have never seen before. In contrast, automated agents can only perform pre-programmed actions on Web services, reducing their generality and restricting their usefulness to a specialized domain. Many of the employed services call themselves RESTful, although they neglect the...

    Provided By Ghent University

  • White Papers // Jun 2010

    Optical Networks: How Much Power Do They Consume and How Can We Optimize This?

    Both bandwidth demand and energy consumption of ICT and communication networks is increasing and optical networks are regarded to provide high bandwidth solutions while enabling more energy efficiency. In this paper, the authors give an overview of energy consumption in access and core networks with a focus on optical technologies....

    Provided By Ghent University

  • White Papers // Dec 2011

    Benchmarking for Wireless Sensor Networks

    While the number of Wireless Sensor Network (WSN) protocols steadily increases, the evaluation methods have largely remained the same. Although experimentally supported research is gaining popularity, protocol evaluation and comparison remains difficult due to a lack of performance analysis methodologies. This paper introduces a wireless-benchmarking workflow that is designed to...

    Provided By Ghent University

  • White Papers // Apr 2010

    Strategies and Challenges for Interconnecting Wireless Mesh and Wireless Sensor Networks

    Wireless sensor networks and wireless mesh networks are popular research subjects. The interconnection of both network types enables next-generation applications and creates new optimization opportunities. However, current single-gateway solutions are suboptimal, as they do not allow advanced interactions between Sensor Networks (WSNs) and Mesh Networks (WMNs). Therefore, in this paper,...

    Provided By Ghent University

  • White Papers // Jan 2011

    Spectrum Sharing in Heterogeneous Wireless Networks : An FP7 CREW Use Case

    Cognitive Radio (CR) techniques and cognitive networks aim at optimizing the use of the wireless spectrum, by observing the wireless environment and intelligently configuring radio settings and network parameters. The aim of the FP7 CREW project is to establish an open federated test platform in order to facilitate experimental research...

    Provided By Ghent University

  • White Papers // Sep 2011

    Building the Business Case for Wireless Sensors in a Factory Setting

    With the advent of the low complexity wireless technology Zigbee, different cheaper and more energy efficient wireless transceivers became available on the market. These chipsets are gradually introduced in different small scale wireless applications. Especially in cases of wireless sensor networks, the low energy consumption and cost efficiency are a...

    Provided By Ghent University

  • White Papers // Sep 2010

    Non-Intrusive Aggregation in Wireless Sensor Networks

    Since energy is scarce in sensor nodes, wireless sensor networks aim to transmit as few packets as possible. To achieve this goal, sensor protocols often aggregate measured data from multiple sensor nodes into a single packet. In this paper, a survey of aggregation techniques and methods is given. Based on...

    Provided By Ghent University

  • White Papers // Nov 2011

    Model for Power Consumption of Wireless Access Networks

    The power consumption of wireless access networks will become an important issue in the coming years. In this paper, the power consumption of base stations for mobile WiMAX, fixed WiMAX, UMTS, HSPA, and LTE is modeled and related to the coverage. A new metric, the power consumption per covered area...

    Provided By Ghent University

  • White Papers // Jun 2009

    Research and Development of Wireline and Wireless Physical Layer Components and Subsystems

    INTEC design is one of the research groups of the Department of INformation TEChnology (INTEC) at Ghent University and an associated laboratory of IMEC. The INTEC design lab is specialized in the design of high-frequency and high-speed electronic and optoelectronic circuits and systems. It has gained extensive experience by the...

    Provided By Ghent University

  • White Papers // Sep 2009

    Topology Control and Manipulation in a Large Scale Wireless Network Testbed

    While analytical models and well-considered network simulations are invaluable for wireless network researchers, they cannot capture the full complexity and dynamics of the error prone wireless medium. The simplified assumptions that are necessarily used in simulations and calculations often cause unwanted side effects, causing protocols to fail or perform considerably...

    Provided By Ghent University

  • White Papers // Dec 2010

    Network Virtualization and Programmability

    The authors present network virtualization (building virtual or logical networks over a physical infrastructure) and network programmability (allowing the network operator to at least control the network but more fundamentally to define its behavior) concepts. Building networks is a very costly issue. Therefore, it is important to save as much...

    Provided By Ghent University

  • White Papers // Oct 2011

    Municipal Support of Wireless Access Network Rollout : A Game Theoretic Approach

    Next generation access networks are expected to bring ubiquitous broadband access and have attracted interest of municipal governments. This paper investigates the support by municipal authorities for the rollout of such a city-wide wireless broadband access network. Different business cases for 3G and WiFi operators are developed and it is...

    Provided By Ghent University

  • White Papers // Dec 2011

    Suitability of the Wireless Testbed W-ILab.t for VANET Research

    Two quite different tools are normally used in the research of Vehicular Ad Hoc NETworks (VANET). Simulators are practical and cost-efficient, but are not entirely accurate representations of the real life situation. Field Operational Tests (FOT) provide exactly the opposite characteristics. A wireless testbed is situated somewhere in between, but...

    Provided By Ghent University

  • White Papers // Jun 2010

    Resource-Aware Scheduling of Distributed Ontological Reasoning Tasks in Wireless Sensor Networks

    As the number of wireless sensor network applications continues to grow, the need for specialized task scheduling mechanisms, aware of the sensor devices' capabilities and real-time resource availability, is becoming more and more apparent. In this paper, the authors therefore propose a generic model for task scheduling in heterogeneous networks,...

    Provided By Ghent University

  • White Papers // Apr 2010

    Receiver Buffer Behavior for the Selective Repeat Protocol Over a Wireless Channel: An Exact and Large-Deviations Analysis

    In this paper, the authors formulate and analyze a model of the resequencing buffer at the receiver's side for the Selective Repeat protocol over a general class of transmission channels. Thanks to its efficiency, Selective Repeat is a ubiquitous error control mechanism in many different settings, in particular in wireless...

    Provided By Ghent University

  • White Papers // Dec 2009

    Moderate Deviations of Retransmission Buffers Over a Wireless Fading Channel

    The authors study the buffer performance of retransmission protocols over a wireless link. The channel gain is modeled as a discrete-time complex Gaussian model. The advantage of this channel model over simpler alternatives (such as finite-state Markov models) is that the correspondence with the physical situation is more transparent. In...

    Provided By Ghent University

  • White Papers // Feb 2011

    Towards a Deployment Tool for Wireless Access Networks With Minimal Power Consumption

    The power consumption of wireless access networks will become an important issue in the coming years. In this paper, the power consumption of base stations for mobile WiMAX, HSPA, and LTE is modelled. This power consumption is related to the coverage of the base station. The considered technologies are compared...

    Provided By Ghent University

  • White Papers // Feb 2011

    Accurate Assessment of WLAN Exposure in a Wireless Sensor Testbed

    Wireless Local Area Networks (WLANs) are common technology in current office buildings and people are thus exposed to these WLANs during working hours. Moreover, wireless sensor testbeds are already in use by a lot of research institutions worldwide in order to effectively test the wireless protocols or applications in a...

    Provided By Ghent University

  • White Papers // Feb 2011

    General Public Exposure Due to Electromagnetic Fields of New Wireless Technologies in Different Environments

    The WHO International EMF Project RF Research Agenda identified as a research topic a need for measurement surveys to characterize population exposures from all Radio-Frequency (RF) sources, with a particular emphasis on new wireless technologies. There is a need to conduct measurements to assess the typical range of exposures from...

    Provided By Ghent University

  • White Papers // Feb 2011

    Procedure for Assessment of General Public Exposure From WLAN in Offices and in Wireless Sensor Network Testbed

    A fast and accurate measurement procedure to determine experimentally WLAN Radio Frequency (RF) exposure and to test compliance with international guidelines for the general public, is proposed. This is the first paper where all optimal settings for the measurement equipment (sweep time, resolution bandwidth, etc.) are investigated, selected, and validated....

    Provided By Ghent University

  • White Papers // May 2010

    Making a Well-Founded Choice of the Wireless Technology for Train-to-Wayside Data Services

    The provisioning of wireless data services in the railway environment will become increasingly important for train operators and train constructors in the upcoming years. A well-founded choice of the technology to be used for the outdoor network connection is investigated in this paper. Several wireless technologies - including HSPA, E-UTRA...

    Provided By Ghent University

  • White Papers // Nov 2009

    Game-Theoretic Evaluation of Competing Wireless Access Networks for Offering Mobile Internet

    In this paper a complete business case for the rollout of a municipal wireless access network for offering Mobile Internet is evaluated. Two different business players, a municipality deploying a WiFi network and a Mobile Virtual Network Operator (MVNO) offering 3G femtocells, are considered. A case study is performed in...

    Provided By Ghent University

  • White Papers // Sep 2009

    Human Body Posture Tracking Using Flexible, Wireless and Low-Power Sensor Nodes

    Human posture tracking is performed using several sensor nodes attached to a subject's body. A Kalman filter estimates the orientation of each of the nodes from the outputs of the sensors. This orientation is then mapped to the appropriate bodypart allowing full body posture reconstruction. The design of flexible, wireless...

    Provided By Ghent University