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

    Preventing Protocol Switching Covert Channels

    Network covert channels enable a policy-breaking network communication (e.g., within botnets). Within the last years, new covert channel techniques arose which are based on the capability of protocol switching. Such protocol switching covert channels operate within overlay networks and can (as a special case) contain their own internal control protocols....

    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

    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

    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

    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

    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

    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 // 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

    Content Delivery Architectures for Live Video Streaming: Hybrid CDN-P2P as the Best Option

    In the last years, with the help of high-speed and broadband networking, the content delivery service has been grown up widely. There are a lot of providers for online streaming via Content Delivery Network (CDN), Peer-To-Peer (P2P) network or hybrid CDN-P2P system. In this paper, the authors analyze a hybrid...

    Provided By IARIA

  • White Papers // Jul 2011

    Comb Filters for Communication Technology

    An extension of the design of digital equi-ripple comb FIR filters is presented. The authors introduce the fifth type of comb FIR filter which complements the existing four standard types. The design runs from the filter specifications through the degree formula to the impulse response coefficients, which are evaluated by...

    Provided By IARIA

  • White Papers // Jul 2011

    Outage Performance Analysis of Alamouti STBC in Backward Link for Wireless Cooperative Networks

    In this paper, the authors propose a cooperative diversity scheme to improve the end-to-end outage performance via Alamouti space-time block coding with two transmit antennas at a source node in a backward link and a best-relay selection scheme in a forward link. They derive an exact closed-form expression of the...

    Provided By IARIA

  • White Papers // Jul 2011

    Exact Error Probabilities Analysis of Arbitrary 2-D Modulation-OFDM Systems With I/Q Imbalances in Frequency-Flat Rayleigh Fading Channel

    In-phase and Quadrature (I/Q) amplitude and phase imbalances are inevitably caused by signal processing in the analog components such as I/Q mixers, phase shifters, filters, and analog/digital converters within I/Q branches. In the implementation of a modern wireless communication system, I/Q imbalances act as one of the main impairments degrading...

    Provided By IARIA

  • White Papers // Jul 2011

    Layer Optimization for DHT-Based Peer-to-Peer Network

    Hierarchical architecture has been found to facilitate effective search in P2P network and ensure system scalability in P2P application deployment. However, the lack of appropriate size ratio of super nodes layer and ordinary nodes layer makes the system search performance far from being optimal. Taking advantage of node heterogeneity, this...

    Provided By IARIA

  • White Papers // Jul 2011

    Performance Evaluation of Split Connection Methods for Session-Based Group-Oriented Communications

    Group-oriented communication services have become more attractive due to the diversifying demands of Internet users. In these services, the bandwidth available to the link in the network is inefficiently consumed by multiple TCP connections and these individual connections compete against each other. Thus, current group-oriented services cannot use network resources...

    Provided By IARIA

  • White Papers // Jul 2011

    I2P Data Communication System

    As communication becomes more and more an integral part of the people day to day lives, the need to access information increases as well. Security is currently one of the most important factors to consider in the authors' aim to achieve ubiquitous computing, and with it raises the problem of...

    Provided By IARIA

  • White Papers // Jul 2011

    Experimental IPTV and IPv6 Extended Provisioning in a Virtual Testbed

    The increasing interest in Internet Protocol TeleVision (IPTV) and Internet Protocol Version 6 (IPv6) has driven the need to find a solution to run IPTV and IPv6 outside of a normal public access network. To find new solutions a virtual testbed based on Virtual Private Network (VPN) was built. VPN...

    Provided By IARIA

  • White Papers // Jul 2011

    Analysis of the Implementation of Utility Functions to Define an Optimal Partition of a Multicast Group

    As the optimal use of network resources is a major issue for telecoms operators, the authors started works aiming to, firstly, improve the utilization of network resources by transmitting the IP packets in multicast when possible, secondly, to adapt the format of the data transmitted in multicast to take into...

    Provided By IARIA

  • White Papers // Jul 2011

    A Survey on Robust Wireless JPEG 2000 Images and Video Transmission Systems

    This paper proposes a survey of robust wireless JPEG 2000 images and video transmission systems. The performance of the presented systems is discussed and compared both in terms of time consumption and in terms of robustness against transmission errors. Some opened tracks are then discuss with a special emphasis on...

    Provided By IARIA

  • White Papers // Jul 2011

    Analysis of Reliable and Scalable Video-On-Demand Networks

    Various architectures have been proposed and implemented to handle the rapid growth in demand for video delivering technologies. This paper implements and thoroughly examines various Video-on-Demand (VoD) architectures using the NS2 simulation tool. The simulation tool used for the project provides an efficient platform to analyze different architectures and obtain...

    Provided By IARIA

  • White Papers // Jul 2011

    Usability Evaluation and Study of a Video-Conferencing Service Provided Via the Virtual Conference Centre

    Usability evaluation is a core component of User-Centred Design (UCD) approach and aims primarily to evaluate effectiveness, efficiency and satisfaction when users interacting with a product/service to achieve their goals and needs, influencing their decision to its future adoption (i.e., user acceptance). The focus of this research paper was to...

    Provided By IARIA

  • White Papers // Jul 2011

    Multi-Episodic Dependability Assessments for Large-Scale Networks

    As a network infrastructure expands in size, the number of concurrent outages can be expected to grow in frequency. The purpose of this paper is to investigate through simulation the characteristics of concurrent network outages and how they impact network operators' perspective of network dependability. The dependability investigated includes 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

  • White Papers // Nov 2011

    Learning Enhanced Environment Perception for Cooperative Power Control

    The vast proliferation of wireless networking devices, coupled with the trend for short-range communications in dense residential environments, imposes new challenges for the efficient addressing of problems resulting from co-existence of heterogeneous devices (e.g., interference) under capacity and energy constraints. This paper proposes and evaluates a cooperative distributed algorithm for...

    Provided By IARIA

  • White Papers // Nov 2011

    Study on Secure Mobile Communication Based on the Hardware Security Module

    This paper presents a survey of information protection methods for secure mobile communication. Most existing software-based information protection systems have a greater risk for the loss or theft and have difficulty in maintaining. In order to solve these problems, the authors considered methods of information protection method based on hardware...

    Provided By IARIA

  • White Papers // Nov 2011

    MergeIA: A Service for Dynamic Merging of Interfering Adaptations in Ubiquitous System

    The composition of adaptations with system's application does not always yield to the desired behavior. Each adaptation occurs correctly when it is separated but it may interact with other adaptations when they are combined. These interactions can affect the final behavior after adaptation; the authors call this an interference. This...

    Provided By IARIA

  • White Papers // Nov 2011

    An Extension of RankBoost for Semi-Supervised Learning of Ranking Functions

    The purpose of this paper was a semi-supervised learning method of alternatives ranking functions. This method extends the supervised RankBoost algorithm to combines labeled and unlabeled data. RankBoost is a supervised boosting algorithm adapted to the ranking of instances. Previous work on ranking algorithms has focused on supervised learning (i.e.,...

    Provided By IARIA

  • White Papers // Nov 2011

    A DHT-Based Scalable and Fault-Tolerant Cloud Information Service

    In this paper, the authors present an Information Service designed for maintaining resource information in Cloud datacenters. They employ a P2P cluster of super-peers that share the resource information and load of related activities in a Distributed Hash Table (DHT) based manner. Their DHT does not employ the standard keyspace...

    Provided By IARIA

  • White Papers // Nov 2011

    A 3D Simulation Framework for Safe Ambient-Assisted Home Care

    The Safe Home Care project focuses on assembling safe home assisted-living environments built on autonomous Off-The-Shelf systems. The authors argue that these smart spaces will contribute to relieve the pressure on health systems by providing the means for ambulatory and daily life assistance. However, the integration of disparate sovereign systems...

    Provided By IARIA

  • White Papers // Nov 2011

    Context-Aware Multimedia Distribution to User Groups

    Increasingly, multimedia services require efficient delivery systems to support content distribution. If a service targets groups of users then a point-to-multipoint distribution technology is naturally more optimized. 3GPP has specified MBMS (Multimedia Broadcast Multicast Service) and E-MBMS (Evolved MBMS) systems to broadcast and multicast rich media contents to mobile communities...

    Provided By IARIA

  • White Papers // Nov 2011

    A TCP Service Migration Protocol for Single User Multiple Devices

    In this paper, the authors present a new transport protocol TSMP, which seeks to support data transfer for the emerging usage paradigm of "Single user, multiple devices" in a TCP compatible manner. Through its novel naming and proxy-based designs, TSMP is able to retain the current client and server protocol...

    Provided By IARIA

  • White Papers // Jul 2011

    A Beacon Cluster-Tree Construction Approach for ZigBee/IEEE802.15.4 Networks

    Wireless Sensor Networks (WSN) based on the IEEE 802.15.4 standard are in a constant expansion. Applications like production control, building control are more and more based on WSN because of their energy efficiency, self organization capacity and protocol flexibility. The IEEE 802.15.4 standard defines 3 network topologies: the mesh topology,...

    Provided By IARIA

  • White Papers // Jul 2011

    DS-CDMA Receiver in Software Defined Radio Technology

    Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows to try out different algorithms of signal receiving. This particular feature led to choose this platform to implement a DS-CDMA receiver...

    Provided By IARIA

  • White Papers // Jul 2011

    Resource Allocation of Adaptive Subcarrier Block With Frequency Symbol Spreading for OFDMA

    In a wireless network, the signals transmitted from one sender to different users have independent channel fluctuation characteristics. The diversity that exists between users is called multiuser diversity and can be exploited by the sender to enhance the capacity of wireless network. In multiuser diversity OFDMA system, exploiting channel fluctuation...

    Provided By IARIA

  • White Papers // Jul 2011

    A Solution for Seamless Video Delivery in WLAN/3G Networks

    In this paper, the authors introduce a Session Proxy (SP) into a scenario in which Wireless Local Area Network (WLAN) and 3th Generation of networks cellular (3G networks) are integrated using peer-to-peer architecture, with Mobile IP (MIP) as the mobility manager. This solution tries to preserve the quality of the...

    Provided By IARIA

  • White Papers // Jul 2011

    REST-Based Meta Web Services in Mobile Application Frameworks

    This paper describes how a multimodal dialogue application framework can be used to implement specific mobile applications and dynamic HTTP-based REST services. REST services are already publicly available and provide useful location-based information for the user on the go. The authors use a distributed, ontology-based dialogue system architecture where every...

    Provided By IARIA

  • White Papers // Jul 2011

    Evaluation of the Wireless Network Used by a Tour Guide in a Cultural Environment

    Wireless tour guides are mobile applications running on a PDA that are very popular among cultural environments, such as museums and art exhibitions. The Human-Computer Interaction quality derived from the use of these guides heavily depends on the wireless network used to access the information of the artefacts in the...

    Provided By IARIA

  • White Papers // Jul 2011

    Improved Spatial and Temporal Mobility Metrics for Mobile Ad Hoc Networks

    This paper shows that two well-known spatial and temporal mobility metrics for Mobile Ad hoc NETworks (MANETs) have drawbacks, possibly leading to invalid results. Based on the concept of spatial dependence in the absence of movement among mobile nodes, the authors propose mobility metrics able to promptly capture spatial and...

    Provided By IARIA

  • White Papers // Jul 2011

    A Heap-Based P2P Topology and Dynamic Resource Location Policy for Process Migration in Mobile Clusters

    A mobile cluster experiences disruption in execution of long-running applications due to its highly dynamic nature. Process migration handles such dynamism to have seamless computing with minimal disruption. The challenge in process migration is that it should take considerably less time and techniques adopted for static networks are not suitable...

    Provided By IARIA

  • White Papers // Jul 2011

    MMSP: Designing a Novel Micro Mobility Sensor Protocol for Ubiquitous Communication

    Designing low power and less delay for mobile nodes is one of the most important issues for the Ubiquitous Sensor Networks (USN). The paper presents a novel Micro Mobility Sensor Protocol (MMSP), as an enhanced form of the AODV (Ad hoc On-demand Distance Vector) protocol, in order to improve the...

    Provided By IARIA

  • White Papers // Jul 2011

    Handover Scenario and Procedure in LTE-Based Femtocell Networks

    The deployment of Femtocell as the emerging wireless and mobile access technology becomes a solution for the bandwidth limitation and coverage issues in conventional mobile network system (macrocell). In this paper the handover procedure in femtocell network is investigated. The procedure is based on 3GPP LTE specification. Three handover scenarios:...

    Provided By IARIA

  • White Papers // Jul 2011

    Performance Analysis of Receive Collaboration in TDMA-Based Wireless Sensor Networks

    This paper presents a general framework to enable the implementation of receive collaboration in Wireless Sensor Networks (WSN). The framework also allows the evaluation of Collaborative Channel Equalization (CCE) performance as one aspect of receive collaboration. The authors' analysis shows that the use of receive collaboration to receive signals from...

    Provided By IARIA

  • White Papers // Jul 2011

    Anonymous Agents Coordination in Smart Spaces

    Rapid developments of communication, data processing and storage technologies, and continuing proliferation of consumer devices that surround user have created an opportunity for creation of a new generation of services based on smart spaces concept. The current approach for expanding mobile devices functionality is integration of new physical components. But...

    Provided By IARIA

  • White Papers // Jul 2011

    Case Study of the OMiSCID Middleware: Wizard of Oz Experiment in Smart Environments

    This paper presents a case study of the usage of OMiSCID 2.0, the new version of a lightweight middleware for ubiquitous computing and ambient intelligence. The objective of this middleware is to bring Service Oriented Architectures to all developers. After comparing to available solutions, the authors show how it integrates...

    Provided By IARIA

  • White Papers // Jul 2011

    SmartBuilding: A People-to-People-to-Geographical-Places Mobile System Based on Augmented Reality

    People-to-People-to-Geographical-Places systems connect places to communities. Generally, these systems require users to perform complex tasks using mobile phones. Thus, the creation of powerful interaction techniques and the design of effective and easy interfaces are key requirements. The system, the authors propose in this paper, named SmartBuilding, is a mobile Augmented...

    Provided By IARIA

  • White Papers // Jul 2011

    Network Architectures for Ubiquitous Home Services

    The on-going growth of connectivity has brought new opportunities for Home Network; Home network will soon be a place of a large amount of services, from the gadget to the home control. In order to provide and render these services, operator should propose a framework for supporting the deployment of...

    Provided By IARIA

  • White Papers // Jul 2011

    The QoE-Oriented Heterogeneous Network Selection Based on Fuzzy AHP Methodology

    The next generation of wireless communication will be characterized by heterogeneity. One of the challenges arisen is access selection among various radio access technologies. Meanwhile, the Quality of Experience (QoE) of user is becoming one of the most concerned topics. Analytic Hierarchy Process (AHP) has been popularly used in network...

    Provided By IARIA

  • White Papers // Jul 2011

    EAP-Kerberos: Leveraging the Kerberos Credential Caching Mechanism for Faster Re-Authentications in Wireless Access Networks

    Although the wireless technology nowadays provides satisfying bandwidth and higher speeds, it still lacks improvements with regard to handoff performance. Existing solutions for reducing handoff delays are specific to a particular network technology or require expensive upgrades of the whole infrastructure. In this paper, the authors investigate performance benefits of...

    Provided By IARIA