IARIA

Displaying 361-400 of 1223 results

  • White Papers // Apr 2012

    Advancement Towards Secure Authentication in the Session Initiation Protocol

    The digest access authentication method used in the voice over IP signaling protocol, SIP, is weak. This authentication method is the only method with mandatory support and widespread adoption in the industry. At the same time, this authentication method is vulnerable to a serious real-world attack. This poses a threat...

    Provided By IARIA

  • White Papers // Apr 2012

    The Strategic Role of IT as an Antecedent to the IT Sophistication and IT Performance of Manufacturing SMEs

    The business value of IT (Information Technology) applications for SMEs (Small- and Medium-sized Enterprises) is dependent upon how such applications \"Fit\" with the strategic orientation of these firms. Based on the strategic alignment of IT, this study uses a systemic approach to test the contribution of three predictors of IT...

    Provided By IARIA

  • White Papers // Apr 2012

    Data Portability Using WebComposition/Data Grid Service

    Web 2.0 has become the ubiquitous platform for publishing, sharing and linking of content. While users are empowered to create and manage their data, the latter is still scattered and controlled by distributed and heterogeneous web applications. The data is usually stored in internal silos and is only partially exposed...

    Provided By IARIA

  • White Papers // Apr 2012

    Packet Scheduling Architecture With Service Specific Queue Sorting and Adaptive Time Domain Scheduling Algorithms for LTE-Advanced Networks

    In this paper, a cross layer design packet scheduling architecture is proposed for Long Term Evolution-Advanced downlink transmission, to guarantee the support of quality of service requirements in a mixed traffic environment. The proposed architecture uses service specific queue sorting algorithms for different traffic types and an adaptive time domain...

    Provided By IARIA

  • White Papers // Apr 2012

    Towards Distributing Multimedia Applications on a Virtualized Cloud Infrastructure

    The authors examine some technological aspects of cloud computing, focusing on virtualization applied to various data types including multimedia and identify the benefits & security concerns for a modern IT infrastructure. An experiment to migrate a live company server consisting of Microsoft Exchange e-mail and file server to a cloud...

    Provided By IARIA

  • White Papers // Apr 2012

    Estimating Perceived Video Quality From Objective Parameters in Video Over IP Services

    In Video over IP services, perceived video quality heavily depends on parameters such as video coding and network Quality of Service. This paper proposes a model for the estimation of perceived video quality in video streaming and broadcasting services that combines the aforementioned parameters with other that depend mainly on...

    Provided By IARIA

  • White Papers // Apr 2012

    A Radio-Resource Switching Scheme in Aggregated Radio Access Network

    In an Aggregated Radio Access Network (A-RAN), wherein multiple Radio Access Technologies (RAT) coexist, different radio resource utilization in each RAT may result in decreasing Quality of Service (QoS). In this paper, the authors propose a radio resource switching scheme in A-RAN coexist to provide multi-modal mobile users with the...

    Provided By IARIA

  • White Papers // Apr 2012

    Robust Digital Video Watermarking in the Spatial and Wavelet Domain

    This paper presents two blind video watermarking techniques in the spatial and wavelet domain proposed by the authors and compares the two approaches. The original watermark and the original, unwatermarked videos are not required for the watermark extraction process. The two methods are combinations of spread-spectrum and quantization based techniques....

    Provided By IARIA

  • White Papers // Apr 2012

    Estimation of Perceived Quality in Convergent Services

    Triple-Play (3P) and Quadruple-Play (4P) services are being widely offered by telecommunication services providers. Such services must be able to offer equal or higher quality levels than those obtained with traditional systems, especially for the most demanding services such as broadcast IPTV. This paper presents a matrix-based model, defined in...

    Provided By IARIA

  • White Papers // Apr 2012

    Unified Methodology for Broadband Behavior Measurements in the Acreo National Testbed

    The continuous evolution of Internet and Internet applications increases the demands on access networks. Understanding user behavior and Internet usage patterns is fundamental in developing future access networks that meet technical as well as end user needs, and from a societal point of view it is equally important to correctly...

    Provided By IARIA

  • White Papers // Apr 2012

    A Hybrid VOX System Using Emulated Hardware Behaviors

    This paper analyzes two well-known but complementary speech detection algorithms, and combines them to create a robust, low complexity method of speech detection. Software emulation of behaviors important in venerable hardware-based voice-operated switches is key to hybrid system performance. The authors test the hybrid system in the context of amateur...

    Provided By IARIA

  • White Papers // Apr 2012

    Adaptive Resource Allocation Mechanism for Broadband Mobile Network

    Mobile networks have been continuously developed from 3.5G to 3.9G/4G with high speed wireless technologies (i.e., broadband mobile network). So, mobile networks need to provide more sufficient QoS mechanism to provide enhanced user's satisfaction. In this paper, the authors propose a new adaptive resource allocation mechanism based on utility function...

    Provided By IARIA

  • White Papers // Apr 2012

    Real Time Telecom Revenue Assurance

    Telecommunication industry has seen phenomenal growth and intense competition in recent times. Basic connectivity has been commoditized and service providers need to provide personalized and differentiated services to stay competitive and form lasting customer relationship. One of the ways they can do this is by analyzing the data that are...

    Provided By IARIA

  • White Papers // Apr 2012

    Performance Modeling of Database Servers in a Telecommunication Service Management System

    Resource optimization mechanisms, as admission control and traffic management, require accurate performance models that capture the dynamics of the system during high loads. The main objective of this paper is to develop an accurate performance model for database servers in a telecommunication service management system. The authors investigate the use...

    Provided By IARIA

  • White Papers // Apr 2012

    Wi-Fi Proximity and Context-Aware Browsing

    This paper describes a new model for accessing to local data for mobile subscribers. The authors' model uses Wi-Fi proximity ideas. In their concept, any exiting or even especially created Wi-Fi hot spot could be used as presence sensor that can open (discover) access for some user-generated content. In their...

    Provided By IARIA

  • White Papers // Apr 2012

    Targeting Situational Awareness Beyond the Event Horizon by Means of Sensor

    The main input of this paper is to examine a solution for acquiring data from beyond Event Horizon in an area of interest while operating in low-level operations in a given battle-space. As the pace of modern warfare increases, so does the necessity for maintaining accurately and timely updated Situational...

    Provided By IARIA

  • White Papers // Apr 2012

    Investigations of Resource Allocation Schemes Between Multi-Hop Backhaul Network and Access Network

    In this paper, the trade-off on resource allocation between multi-hop backhaul and access is investigated. Multi-hop, treated as a special case of mesh, is very useful in non-contention based network. The authors assume in-band relay backhaul and access share the same resource. Based on calculation and simulation, the relationship among...

    Provided By IARIA

  • White Papers // Apr 2012

    Assessment of LTE Uplink Power Control With Different Frequency Reuses Schemes

    Single Carrier Frequency Division Multiple Access (SC-FDMA) is the access scheme chosen by 3GPP for uplink UTRAN Long Term Evolution project (LTE). As SC-FDMA provides intra-cell orthogonality, one of the main reasons for performance degradation is the Inter-Cell Interference (ICI). This degradation is accentuated by the frequency reuse of 1...

    Provided By IARIA

  • White Papers // Apr 2012

    MediaSense - An Internet of Things Platform for Scalable and Decentralized Context Sharing and Control

    Research in Internet-of-Things infrastructures has so far mainly been focused on connecting sensors and actuators to the Internet, while associating these devices to applications via web services. This has contributed to making the technology accessible in areas such as smart-grid, transport, health, etc. These early successes have hidden the lack...

    Provided By IARIA

  • White Papers // Apr 2012

    Mobile Robot Localization by RFID Method

    This paper explores the merits of the indoor positioning system using Radio-Frequency IDentification (RFID) technology for mobile robots. The indoor positioning function by the Received Signal Strength Indicator (RSSI) and the Link Quality Indicator (LQI) method is developed first to determine the location of the robot. The RSSI and the...

    Provided By IARIA

  • White Papers // Apr 2012

    Joint Design of RFID Reader and Tag Anti-Collision Algorithms: A Cross-Layer Approach

    This paper investigates the potential interactions between reader and tag anti-collision algorithms of passive RFID (Radio Frequency IDentification) systems. Conventionally, reader and tag anti-collision algorithms are designed by assuming that they are independent from each other. In practice, however, readers and tags usually operate in the same frequency band. Therefore,...

    Provided By IARIA

  • White Papers // Apr 2012

    Wireless Network Localization - Optimization Processing

    This paper deals with localization in wireless cellular networks. The authors performed measurement of the received signal strength in and around Brno city and stored the collected data. The localization approach uses multi-slope channel models to estimates the propagation distance from the signal strength. Results are processed by two localization...

    Provided By IARIA

  • White Papers // Apr 2012

    Stereo Video Disparity Estimation Using Multi-Wavelets

    Disparity estimation in stereo video processing is a crucial step in the generation of a 3D view of a scene. In this paper, a multi-wavelet based stereo correspondence matching technique for video is proposed. A multi-wavelet transform is first applied to a pair of stereo frames. Correspondence matching is initially...

    Provided By IARIA

  • White Papers // Apr 2012

    A LUT Baseband Digital Pre-Distorter for Linearization

    This paper proposes a Look-Up-Table Digital Pre-Distorter (LUT DPD) for PA linearization with baseband predistorting procedure. Memory effect can be compensated with Memory Polynomial (MP) modelisation for the wideband applications. Measurements are realized on a PA ZFL-2500 driven by a modulated 16QAM signal with 3.84MHz bandwidth at the carrier frequency...

    Provided By IARIA

  • White Papers // Apr 2012

    Cloud Computing Ontologies: A Systematic Review

    This paper is to obtain a holistic view of Cloud Computing ontologies, their applications and focuses. The identification of primary studies in this systematic review is based on a pre-defined research protocol with a research question, inclusion and exclusion criteria and a search strategy. The authors summarize the selected studies...

    Provided By IARIA

  • White Papers // Apr 2012

    An Ontology-Based Reperesentation of the Google+ API

    Social Networking Services (SNS) provide users with functionalities for developing their on line social networks, connecting with other users, sharing and consuming content. While most of popular SNS provide open Web 2.0 APIs, they remain disconnected from each other thus fragmenting user's data, social network and content. Semantic social web...

    Provided By IARIA

  • White Papers // Apr 2012

    Dual-Lag Correlation-Based Feature Detection of OFDM Signals With Cyclic Phase Compensation

    This paper presents cyclostationarity-based spectrum sensing algorithm implementation for detection of OFDM signals. The detector utilizes two distinct auto-correlation delays and introduces compensation of the phase difference between the two cyclic auto-correlation functions. This improves detection sensitivity (or alternatively reduces detection time) compared to other similar algorithms while maintaining the...

    Provided By IARIA

  • White Papers // Apr 2012

    NC-OFDM Cognitive Radio Optimal Pilot Placement for the LS Estimator

    A theoretical contradiction between the areas of the optimal pilot-pattern design and the optimal power loading algorithms has been found to exist for proposed Non-Contiguous Orthogonal Frequency-Division Multiplexing (NCOFDM) Cognitive Radio (CR) systems. It has been found that the proposed, optimal pilot-patterns specify that the Secondary User (SU) should convert...

    Provided By IARIA

  • White Papers // Apr 2012

    Cooperative Jam Technique to Increase Physical-Layer Security in CWSN

    This paper considers the problem of secure communication in Wireless Sensor Networks in the presence of non-colluding passive eavesdroppers. Cognitive networks capabilities such as spectrum sensing, share information and collaboration to optimize the communications can be used to avoid attacks. A collaborative jamming technique is proposed to increase Cognitive Wireless...

    Provided By IARIA

  • White Papers // Apr 2012

    Joint Optimal Spectrum Sensing Time and Power Allocation in Ultra Wideband Cognitive Radio Networks

    Ultra WideBand (UWB) system is overlapped with various wireless systems, such as WLAN, WiMax and UMTS, which limits the use of UWB. Cognitive Radio (CR) enables UWB systems to efficiently use the overlapped spectrum without causing interference to other wireless systems. In this paper, the authors focus on the low-complexity...

    Provided By IARIA

  • White Papers // Apr 2012

    CRN Survey and a Simple Sequential MAC Protocol for CRN Learning

    With the idea to use the spectrum band efficiently, much of the research is being published in the field of cognitive radio network to share the licensed spectrum band with unlicensed users when licensed users are not active. Cognitive Radio Network (CRN) has introduced a lot of new challenges in...

    Provided By IARIA

  • White Papers // Apr 2012

    Cognitive Wireless Sensor Networks Framework for Green Communications Design

    Cognitive Wireless Sensor Networks is an emerging technology with great potential to avoid traditional wireless problems such as reliability, interferences and spectrum scarcity. Because of the Wireless Sensor Network fast growth and the use of batteries, current rate of power consumption per unit of data cannot be sustained. Therefore, one...

    Provided By IARIA

  • White Papers // Apr 2012

    Testbed for Cognitive Radio Networks Based on USRP2/N200 Modules

    This paper deals with description of software defined radio test-bed based on USRP2/N200 modules available from ETTUS research. The aim of this test-bed is to develop and test the algorithms for cognitive radio mobile networks. The primary focus is on the spectrum sensing in moving secondary users scenario, adaptation of...

    Provided By IARIA

  • White Papers // Apr 2012

    Smart Noise - Linearity Breakdown in Homodyne Multi-Standard Radio Receivers

    This paper analyzes the noise - linearity breakdown in direct conversion multi-standard radio receivers embedding analog signal conditioning. The paper's main goal is to develop a systematic noise - linearity partitioning methodology to be used in splitting the multi-standard receiver noise and linearity budget between its High Frequency (HF) part...

    Provided By IARIA

  • White Papers // Apr 2012

    Optimal Algorithm for Cognitive Spectrum Decision Making

    In this paper, an optimal algorithm of spectrum decision making is presented for a real cognitive radio network with tree-based topology. All nodes of a subnet in such network have the capability in being aware of spectrum information by both energy detector based sensing and centralized cooperative sensing. After gathering...

    Provided By IARIA

  • White Papers // Apr 2012

    Learning-Based Spectrum Sensing in OFDM Cognitive Radios

    In this paper, spectrum sensing in OFDM-based cognitive radio systems is modeled as a pattern recognition problem. The proposed scheme uses a linear classifier to decide on when the spectrum is busy (class 1) or not busy (class 2). Two types of feature vectors are compared in this work, namely...

    Provided By IARIA

  • White Papers // Apr 2012

    Developing Cognitive Strategies for Reducing Energy Consumption in Wireless Sensor Networks

    Due to Information and Communication Technologies, wireless data traffic is growing with a rate higher than 25% annually. Wireless Sensor Networks (WSNs) represent nowadays one of the most rapidly expanding sectors in wireless networks. In this context, applying reducing power consumption in WSN scenarios is a great challenge to face...

    Provided By IARIA

  • White Papers // Apr 2012

    QoS-Based Autonomic Service Component for Service Delivery

    Now-a-days, with the rising complexity of the service personalization in a heterogeneous and mobile context and the need to satisfy the End-to-End QoS, the service resources should be taken into account as a prominent resource as well as the network resources. Therefore, a high degree of self-sufficiency, self-management and automation...

    Provided By IARIA

  • White Papers // Apr 2012

    Evaluation of a New Scheduling Scheme for VoIP with Mobility in 3G LTE

    3G Long Term Evolution is an all internet protocol based network and one of its main aims is to improve mobile multimedia services. This is achieved through streamlining the system for packet services. This leads to improvements in the form of higher bit rates, lower latencies, and a variety of...

    Provided By IARIA

  • White Papers // Apr 2012

    Quality of Service Modelling for Federated Wireless Sensor Network Testbeds Gateways

    The federation of WSN testbeds has brought forward the requirement for a QoS implementation, in order to ensure efficient and reliable end-to-end communication between testbeds' users and testbeds' facilities. Now-a-days, the Internet has become the de facto standard for establishing remote connectivity between these testbeds. However, as the mechanism of...

    Provided By IARIA

  • White Papers // Jun 2010

    Adjustable Multi-Sector Cellular Base Station Antenna

    This paper presents a Dual Beam Array (DBA) for higher-order sectorization of a cellular site. This technique provides a means of cost-effective boosting network capacity without the use of additional frequency spectrum. The DBA comprises of a multi-column array and a beam forming circuit, which produces two overlapping beams with...

    Provided By IARIA

  • White Papers // Jun 2010

    Context Modeling for Cross-Layer Context Aware Adaptations

    Demand for real-time services over the Internet while moving, is growing rapidly. This necessitates efficient delivery of wireless real-time traffic. Limitations of existing layered protocol stack for wireless networks lead to the proposal of cross-layer interactions as an alternative solution. At the same time, next generation ubiquitous computing drives wireless...

    Provided By IARIA

  • White Papers // Jun 2010

    Dynamic End-to-End QoS Provisioning and Service Composition Over Heterogeneous Networks

    This paper presents an approach that aims to provide Quality of Services (QoS) over heterogeneous Internet domains. The goal is to install and to manage QoS inside each domain and to ensure it on the end to end data path. QoS is a key requirement representing a significant infrastructure upgrade...

    Provided By IARIA

  • White Papers // Jun 2010

    Time Dependent L?vy Flights Models for Internet Traffic

    Measurements of local and wide-area network traffic in the 90's established the relation between burstiness and self-similarity of network traffic. Several papers explained that the widely used Poisson based models could not be applied for the past decade's network traffic. Recent papers have questioned the direct applicability of these results...

    Provided By IARIA

  • White Papers // Jun 2010

    End-to-End Prediction Model of Video Quality and Decodable Frame Rate for MPEG Broadcasting Services

    This paper proposes, describes and evaluates a novel theoretical framework for end-to-end video quality assessment of MPEG-based video services in hand-held and mobile wireless broadcast systems. The proposed framework consists two discrete models: a model for predicting the video quality of an encoded signal at a preen-coding state by specifying...

    Provided By IARIA

  • White Papers // Jun 2010

    Adaptive Congestion Detection and Control at the Application Level for VoIP

    For decades, researchers have worked extensively in the area of congestion control for packet-switched networks. Many proposed solutions take advantage of the congestion-control mechanism in Transmission Control Protocol (TCP), and these approaches work well for networks that have heavy TCP traffic. However, these approaches are not universally effective - they...

    Provided By IARIA

  • White Papers // Jun 2010

    Long-Range CAN: to Enhance the Performance of Content-Addressable Networks

    Distributed hash table algorithms construct structured P2P networks to control the communication cost of resource lookups. Resource or content lookups in DHT protocols are performed based on a key that is a hash print of the searched content. Nodes and keys are mapped on an IDentifier (ID) space, and the...

    Provided By IARIA

  • White Papers // Jul 2011

    Dynamic Codec Selection Algorithm for VoIP

    This paper gives a proposal on algorithm for adaptive adjustment of VoIP sources transmission rate based on voice quality estimated at the receiver. This adjustment is achieved through the appropriate use of differing voice codecs, as changes in network conditions occur, in order to maintain an efficient utilization of the...

    Provided By IARIA

  • White Papers // Jul 2011

    UEP for Wireless Video Streaming Using Spatially Multiplexed MIMO Systems With a Suboptimal Joint Detection

    Recently, Unequal Error Protection (UEP) techniques for video transmission over Multiple-Input Multiple-Output (MIMO) wireless channel have been actively researched. Spatially Multiplexed (SM) MIMO system with joint detection achieves a good Bit Error Rate (BER) performance as well as a high data rate, however, UEP can not be implemented because all...

    Provided By IARIA

  • White Papers // Jul 2011

    Particle Swarm Optimization With Time-Varying Acceleration Coefficients Based on Cellular Neural Network for Color Image Noise Cancellation

    This paper proposes a novel method for designing templates of Cellular Neural Network (CNN) for color image noise removal. The control of CNN systems is achieved via Particle Swarm Optimization (PSO) with Time-Varying Acceleration Coefficients (PSO-TVAC). Based on PSO-TVAC method, the proposed approach can automatically update the parameters of the...

    Provided By IARIA

  • White Papers // Jul 2011

    Peer Clustering System for Different Start Video Broadcasting

    The different start video broadcasting is a new approach to manage video streaming applications. This approach allows unpunctual users to view broadcast programs from the beginning. This paper proposes a cluster model for different start video broadcasting. The model is composed of five processes: peer joining, super node selection, backup-node...

    Provided By IARIA

  • White Papers // Jul 2011

    Mining Web Usage and Content Structure Data to Improve Web Cache Performance in Content Aggregation Systems

    Web cache performance has been reduced in Web 2.0 applications due to the increase of the content update rates and the higher number of personalized web pages. This problem can be minimized by the caching of content fragments instead of complete web pages. The authors propose a classification algorithm to...

    Provided By IARIA

  • White Papers // Jul 2011

    Evaluation of End-to-End Quality of Service Over VPN Networks Through Various Priority Mechanisms

    VPN networks running over MPLS have found widespread acceptance as both an efficient and cost effective means to provide connectivity for large organizations and companies. However, providing QoS is still a major challenge that needs to be addressed. Using realistic input traffic, a simulation model is built for a large...

    Provided By IARIA

  • White Papers // Jun 2010

    Service Triggering in MVNO & Multi-Country Environments

    Traditional mobile operators invested huge amounts of money in the 1990s to build the current 2G wireless networks, like GSM networks in Europe. Those networks have proven to be stable. In most cases, their capacity has not yet been exhausted. Furthermore, the marketing departments of mobile operators now consider the...

    Provided By IARIA

  • White Papers // Jun 2010

    How to Achieve and Measure the Benefits of Fault Tolerant Production Infrastructures

    Disaster Recovery Infrastructures, which have become a common aspect of all major IT infrastructures, could transform to Fault Tolerant Infrastructures in order to increase productivity, effectiveness and availability. This paper suggests a methodology for the transformation of High Availability Systems on which Disaster Recovery Infrastructures are based, to Fault Tolerant...

    Provided By IARIA

  • White Papers // Apr 2012

    Wi-Fi Proximity and Context-Aware Browsing

    This paper describes a new model for accessing to local data for mobile subscribers. The authors' model uses Wi-Fi proximity ideas. In their concept, any exiting or even especially created Wi-Fi hot spot could be used as presence sensor that can open (discover) access for some user-generated content. In their...

    Provided By IARIA

  • White Papers // Apr 2012

    Targeting Situational Awareness Beyond the Event Horizon by Means of Sensor

    The main input of this paper is to examine a solution for acquiring data from beyond Event Horizon in an area of interest while operating in low-level operations in a given battle-space. As the pace of modern warfare increases, so does the necessity for maintaining accurately and timely updated Situational...

    Provided By IARIA

  • White Papers // Apr 2012

    Investigations of Resource Allocation Schemes Between Multi-Hop Backhaul Network and Access Network

    In this paper, the trade-off on resource allocation between multi-hop backhaul and access is investigated. Multi-hop, treated as a special case of mesh, is very useful in non-contention based network. The authors assume in-band relay backhaul and access share the same resource. Based on calculation and simulation, the relationship among...

    Provided By IARIA

  • White Papers // Apr 2012

    Assessment of LTE Uplink Power Control With Different Frequency Reuses Schemes

    Single Carrier Frequency Division Multiple Access (SC-FDMA) is the access scheme chosen by 3GPP for uplink UTRAN Long Term Evolution project (LTE). As SC-FDMA provides intra-cell orthogonality, one of the main reasons for performance degradation is the Inter-Cell Interference (ICI). This degradation is accentuated by the frequency reuse of 1...

    Provided By IARIA

  • White Papers // Apr 2012

    MediaSense - An Internet of Things Platform for Scalable and Decentralized Context Sharing and Control

    Research in Internet-of-Things infrastructures has so far mainly been focused on connecting sensors and actuators to the Internet, while associating these devices to applications via web services. This has contributed to making the technology accessible in areas such as smart-grid, transport, health, etc. These early successes have hidden the lack...

    Provided By IARIA

  • White Papers // Apr 2012

    Mobile Robot Localization by RFID Method

    This paper explores the merits of the indoor positioning system using Radio-Frequency IDentification (RFID) technology for mobile robots. The indoor positioning function by the Received Signal Strength Indicator (RSSI) and the Link Quality Indicator (LQI) method is developed first to determine the location of the robot. The RSSI and the...

    Provided By IARIA

  • White Papers // Apr 2012

    Joint Design of RFID Reader and Tag Anti-Collision Algorithms: A Cross-Layer Approach

    This paper investigates the potential interactions between reader and tag anti-collision algorithms of passive RFID (Radio Frequency IDentification) systems. Conventionally, reader and tag anti-collision algorithms are designed by assuming that they are independent from each other. In practice, however, readers and tags usually operate in the same frequency band. Therefore,...

    Provided By IARIA

  • White Papers // Apr 2012

    Wireless Network Localization - Optimization Processing

    This paper deals with localization in wireless cellular networks. The authors performed measurement of the received signal strength in and around Brno city and stored the collected data. The localization approach uses multi-slope channel models to estimates the propagation distance from the signal strength. Results are processed by two localization...

    Provided By IARIA

  • White Papers // Apr 2012

    Stereo Video Disparity Estimation Using Multi-Wavelets

    Disparity estimation in stereo video processing is a crucial step in the generation of a 3D view of a scene. In this paper, a multi-wavelet based stereo correspondence matching technique for video is proposed. A multi-wavelet transform is first applied to a pair of stereo frames. Correspondence matching is initially...

    Provided By IARIA

  • White Papers // Apr 2012

    A LUT Baseband Digital Pre-Distorter for Linearization

    This paper proposes a Look-Up-Table Digital Pre-Distorter (LUT DPD) for PA linearization with baseband predistorting procedure. Memory effect can be compensated with Memory Polynomial (MP) modelisation for the wideband applications. Measurements are realized on a PA ZFL-2500 driven by a modulated 16QAM signal with 3.84MHz bandwidth at the carrier frequency...

    Provided By IARIA

  • White Papers // Mar 2011

    Infrared Wireless Network Sensors for Imminent Forest Fire Detection

    This paper presents an automatic forest fire surveillance ground system applied to early fire detection. Sensor wireless network scheme allows not only supervising remotely wide-forest area, but also to detect immediately any fire threat. A real system for forest fire detection in actual operation is presented. The system is based...

    Provided By IARIA

  • White Papers // Mar 2011

    A Distributed Network Management Approach to WSN in Personal Healthcare Applications

    This paper describes the development of a Wireless Sensor Network personal health monitoring system called Medical MoteCare which uses a combination of medical and environmental sensors. SNMP and Code Blue agents are incorporated in the system as is the network management software JaguarSX. Network management models and tools provide an...

    Provided By IARIA

  • White Papers // Mar 2011

    Design and Implementation of Multi-User Wireless Body Sensor Networks

    This paper describes the development of two low power wireless Body Sensor Network (BSN) prototypes that allow the real-time monitoring of wearable sensors data from multiple users with a single base station. The prototypes present differences in the architecture, wireless network hardware and implemented protocols. These systems integrate inertial sensors...

    Provided By IARIA

  • White Papers // Mar 2011

    Human-Assisted Calibration of an Angulation Based Location Indoor System With Preselection of Measurements

    Besides aspects like accuracy and cost, a simple setup process is essential for the adoption of location systems. However, existing systems often require a time-consuming calibration process to determine sensor node positions or orientations. In this paper, the authors present a software aided approach for the calibration of an angulation-based...

    Provided By IARIA

  • White Papers // Mar 2011

    An Integrating Platform for Environmental Monitoring in Museums Based on Wireless Sensor Networks

    Monitoring the museum's environment for preventive conservation of art purposes is one major concern to all museums. In order to properly conserve the artwork it is critical to continuously measure some parameters, such as temperature, relative humidity, light and, also, pollutants, either in storage or exhibition rooms. The deployment of...

    Provided By IARIA

  • White Papers // Mar 2011

    A Wireless IP Multisensor Deployment

    Every sensor node in a Wireless Sensor Network has a microcontroller, a transmitter/receiver and a sensor. It is able to acquire data from specific point in a real environment and transmit it through the Wireless sensor Network. Sometimes it is useful to gather different types of data from the same...

    Provided By IARIA

  • White Papers // Mar 2011

    Evaluation of Outdoor RSS-Based Tracking for WSNs Aiming at Topology Parameter Ranges Selection

    The localization and tracking applications are among the most challenging applications, especially when the Received Signal Strength (RSS) is utilized. The RSS is known to be a noisy signal and difficult to use in localization and tracking applications. In this paper, the authors investigate the possibility a target tracking task...

    Provided By IARIA

  • White Papers // Mar 2011

    Practical Deployments of Wireless Sensor Networks: A Survey

    Sensor networks are becoming one of the most used technologies in the people lives. Although there are several surveys about sensor networks, almost all of them focus on theoretical basis with little simulations. Some studies only explain where this kind of networks can be used, without details on how they...

    Provided By IARIA

  • White Papers // Mar 2011

    Underwater Wireless Sensor Networks: Efficient Localization Schemes Using SemiDefinite Programming

    Location awareness and distance estimation cannot be underestimated in wireless sensor networks especially for the marine environment. State-of-the-art localization research and approaches have been thoroughly reviewed to illustrate the challenges imposed by inaccurate distance measurements and noisy backgrounds. Compared to existing localization approaches, the SemiDefinite Programming approach delivers accurate distance...

    Provided By IARIA

  • White Papers // Mar 2011

    A Taxonomy of Incentive Mechanisms in Peer-to-Peer Systems: Design Requirements and Classification

    Free riders in the Peer-to-Peer systems are the nodes that only consume services but provide little or nothing in return. The people seriously degrade the fault-tolerance, scalability and content availability of the Peer-to-Peer systems. The solution to this problem in Peer-to-Peer networks is to have incentive mechanisms that aim to...

    Provided By IARIA

  • White Papers // Mar 2011

    Constructing a Stable Virtual Peer From Multiple Unstable Peers for Fault-Tolerant P2P Systems

    P2P systems must handle unexpected peer failure and leaving, and thus it is more difficult to implement than server-client systems. In this paper, the authors propose a novel approach to implement P2P systems by using virtual peers. A virtual peer consists of multiple unstable peers. A virtual peer is a...

    Provided By IARIA

  • White Papers // Mar 2011

    Resilient P2P Streaming

    P2P streaming has shown an alternative way of broadcasting media to the end users. It is theoretically more scalable than its client-server based counterpart but suffers from other issues arising from the dynamic nature of the system. This is built on top of the internet by forming an overlay network....

    Provided By IARIA

  • White Papers // Jul 2011

    Soft Errors Mask Analysis on Program Level

    Computer hardware which consist billions of transistors could fail because of soft errors with the improving of semiconductor technology, and these failure could result in incorrect program execution. However, soft errors could be masked. Most methods of SIFT (Software-Implemented Fault Tolerance) do not take mask into account. In fact, these...

    Provided By IARIA

  • White Papers // Nov 2011

    Locating Zigbee Devices in a Cluster-Tree Wireless Sensor Network: an ESD-Based Integrated Solution

    Recent advances in the technology of wireless electronic devices have made possible to build ad-hoc Wireless Sensor Networks (WSNs) using inexpensive nodes consisting of low power processors, a modest amount of memory and simple wireless transceivers. Over the last years, many novel applications have been envisaged for distributed WSNs in...

    Provided By IARIA

  • White Papers // Nov 2011

    An Adaptative Broadcast Scheme for VANET Applications in a High Density Context

    The efficient broadcast of messages in Vehicular Ad-hoc NETwork (VANET) still faces many challenges in current research. In this paper, the authors are interested in multihop broadcast communication for neighborhood discovery applications which increase driver visibility. These applications need to send information with a high rate causing congestion in the...

    Provided By IARIA