IARIA

Displaying 521-560 of 1223 results

  • 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 // Nov 2011

    Increasing Usage Intention of Mobile Information Services Via Mobile Tagging

    Mobile information services are increasingly growing in popularity: end-users are getting used to "Being always on", and they are changing their everyday communication behavior. Organizations focus on new ways of creating value-adding services for their customers, and researchers explore aspects of success and implementation of mobile services. In this connection,...

    Provided By IARIA

  • White Papers // Nov 2011

    Babel Multi-Hop Routing for TinyOS Low-Power Devices

    Efficient routing in Wireless Mesh networks (WMN) with limited bandwidth is a challenging task, especially in networks where nodes have restricted resources. In such environments routing mechanisms should have a small footprint, low CPU usage and minimal routing overhead. If nodes are mobile, topology changes occur permanently, so the routing...

    Provided By IARIA

  • White Papers // Nov 2011

    OLFServ: An Opportunistic and Location-Aware Forwarding Protocol for Service Delivery in Disconnected MANETs

    Handheld devices equipped with Wi-Fi interfaces are widespread nowadays. These devices can form Disconnected Mobile Ad hoc NETworks (DMANETs) spontaneously. These networks may allow service providers, such as local authorities, to deliver new kinds of services in a wide area (e.g., a city) without resorting to the infrastructure-based networks of...

    Provided By IARIA

  • White Papers // Nov 2011

    Significance of Semantic Web in Facilitating HCI in Mobile and Ubiquitous Learning

    Mobile devices are being widely used in education for many purposes such as an instruction tool for learning. However, mobile devices suffer from the limitation of capabilities and resources. Potential solutions to this issue must consider the mobility and personal characteristics of potential education seekers. This paper theoretically describes how...

    Provided By IARIA

  • White Papers // Nov 2011

    Fault Tolerant Execution of Transactional Composite Web Services: An Approach

    The authors propose an approach for efficient, fault tolerant, and correct distributed execution of Transactional Composite Web Services (TCWSS), based on Colored Petri-Net (CPN) formalism. They extend a previous COMPOSER in order it generates, besides a TCWS represented by a CPN, another CPN representing the compensation order for backward recovery....

    Provided By IARIA

  • White Papers // Nov 2011

    Dynamic Negotiation Layer for Secure Semantic Service Oriented Architectures

    The approach of users connected anytime, anywhere, has led to merging isolated islands of enriched services environments into the WEB, leaving the user free to choose among an huge number of services. In this context the introduction of ontologies and the creation of semantic Web services mainly focus on using...

    Provided By IARIA

  • White Papers // Nov 2011

    Performance Evaluation of Wireless IP Telephony (W-IPT) Over Wi-Fi Networks

    As one of the fastest growing voice service technologies, IP Telephony is currently the greatest benefactor of IP Convergence. Apart from the cost and management benefits of a converged network, the exciting array of productivity enabling applications such as unified messaging, collaboration, and presence services within an IP Telephony infrastructure...

    Provided By IARIA

  • White Papers // Nov 2011

    Capturing Mobile Devices Interactions Minimizing the External Influence

    Mobile computing has become an integral part of everyday life for the new 'Information and Knowledge Society'. The new generation of mobile devices and their full connection capabilities enable users to access a wide choice of services and knowledge from everywhere. Owing to this tendency, access to these services has...

    Provided By IARIA

  • White Papers // Nov 2011

    UbiPOL: A Platform for Context-Aware Mobile Device Applications in Policy Making

    UbiPOL is a context-aware platform for policy making. At its core, the UbiPOL platform has an essential framework of web services and APIs. It is intended to aid and support the development of location-based and context-aware applications in the field of policy making. Software developers can make use of UbiPOL...

    Provided By IARIA

  • White Papers // Nov 2011

    A Fast Bandwidth Request and Grant Method for IEEE 802.16 OFDMA/TDD Systems

    In the design of a contention-based bandwidth request scheme, decrease in data transmission delay is the most important factor. This paper proposes a new CDMA-based bandwidth request method in which the bandwidth request code contains the channel quality information and amount of bandwidth required by a mobile station. A mobile...

    Provided By IARIA

  • White Papers // Nov 2011

    External Interference-Aware Distributed Channel Assignment in Wireless Mesh Networks

    Interference is one of the major causes for performance degradation in wireless networks. Channel assignment algorithms have been proven successful to decrease the network-wide interference by using non-overlapping channels for otherwise interfering links. However, external co-located networks and devices are usually not considered in the channel assignment procedure, since they...

    Provided By IARIA

  • White Papers // Nov 2011

    Communication System With SISO Channel Decoding Using Bit Stuffing

    This paper introduces a communication system with typically wireless transmission, with SISO convolutional decoding using predefined reliability values at input of the SISO decoder. "Dummy" bits are stuffed into the information which is to be transmitted over a noisy channel and SISO decoded. Stuffed bits have to be known at...

    Provided By IARIA

  • White Papers // Nov 2011

    An Approach to Enhance the Timeliness of Wireless Communications

    Wireless technologies are the present and the future of network communications. However, the support of real-time data transmission in wireless communications - providing support for execution of well-timed networked operations - is still an open issue, not fully addressed by current wireless network standards and technologies. Thus, this paper proposes...

    Provided By IARIA

  • White Papers // Nov 2011

    Opportunistic Spectrum Sharing Scheme for Secondary WiFi-Like Devices in TV White Spaces

    Secondary spectrum access is a promising approach to improve spectrum utilization by enabling new wireless systems to opportunistically use and efficiently share the licensed bands. This paper targets a WiFi-like reuse of available spectrum in the TV bands and proposes a novel cooperative centralized spectrum sharing scheme that enables protection...

    Provided By IARIA

  • White Papers // Nov 2011

    Interference Control Technology for Heterogeneous Networks

    To eliminate dead spots like home or office and let multiple users efficiently use limited frequency resources by providing a better mobile communication environment that enables high-capacity data transmission service, the demand for a small base station is increasing. Accordingly, the research for automatically minimizing the interference and increasing the...

    Provided By IARIA

  • White Papers // Nov 2011

    Mobile Learning (mLearning) Based on Cloud Computing: mLearning as a Service (mLaaS)

    Despite its hype, cloud computing, with its dynamic scalability and virtualized resources usage, is being widely deployed for several applications in many organizations. It is envisioned that, in the near future, cloud computing will have a significant impact in the educational and learning environment, enabling its own users (i.e., learners,...

    Provided By IARIA

  • White Papers // Nov 2011

    Assistive Mobile Software for Public Transportation

    The need of mobility on public transport for persons with visual impairment is mandatory. While traveling on a public transport, the simple ability to know the current location is almost impossible for such persons. To overcome this hurdle, the authors developed an assistive application that can alert its user to...

    Provided By IARIA

  • White Papers // Nov 2011

    Mobility in a Personalized and Flexible Video-Based Transmedia Environment

    This paper addresses the effective design of Transmedia environments to generate personalized additional video information from iTV, PC and mobile devices with a special focus on mobile devices. It presents the opportunities and challenges of the inclusion of mobile devices on this ubiquitous environment, turning it into a true "Ecosystem...

    Provided By IARIA

  • White Papers // Nov 2011

    Pervasive Computing in Embedded Systems: Designing Cooperative Applications for Real Environments

    The dramatic growth of the amount of information that is made available through computer systems and the increasing need to access relevant information anywhere at any time are more and more overwhelming the cognitive capacity of human users. Instead of providing the right information at the right time, current computer...

    Provided By IARIA

  • White Papers // Nov 2011

    Challenges in the Planning, Deployment, Maintenance and Operation of Large-Scale Networked Heterogeneous Cooperating Objects

    Efficient deployment and management have been identified to be key challenges for the acceptance of solutions based on Cooperating Objects (COs). The operations for CO deployment and management can be classified into five phases in each of which several challenges and issues are emphasized. This paper presents the PLANET project...

    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

    Scalable Resource Provisioning in the Cloud Using Business Metrics

    Currently, cloud infrastructures are in the spotlight of computer science. Through offering on-demand resource provisioning capabilities and high flexibility of management cloud-based systems can seamlessly adjust to the constantly changing environment of the Internet. They can automatically scale according to a chosen policy. Despite the usefulness of the currently available...

    Provided By IARIA

  • White Papers // Nov 2011

    ZeDDS - Fault-Tolerant Data Management in Wireless Sensor Networks with Mobile Users

    In application scenarios where sensor data is temporarily stored within the WSN - instead of transferring the data directly to a base station - data availability is an important factor. Ubiquitous Wireless Sensor Networks (WSNs) consist of sensor nodes which may communicate with each other via unreliable communication links. Furthermore,...

    Provided By IARIA

  • White Papers // Nov 2011

    Modular P2P-Based Approach for RDF Data Storage and Retrieval

    One of the key elements of the semantic web is the Resource Description Framework (RDF). Efficient storage and retrieval of RDF data in large scale settings is still challenging and existing solutions are monolithic and thus not very flexible from a software engineering point of view. In this paper, the...

    Provided By IARIA

  • White Papers // Oct 2011

    Mptrace: Characterizing Physical Memory Usage for Chip Multiprocessors

    The performance of high performance computing applications depends highly on how they are implemented. However, their runtime behavior is tightly coupled with the resources they are allocated such as in which cores the application threads run or in which memory devices their memory space is placed. Thus, depending on their...

    Provided By IARIA

  • White Papers // Oct 2011

    Implementation of Integrated Systems and Resources for Information and Computing

    This paper presents the practical results from the real-life implementation of interactive complex systems in specialized high end computing environments. The successful implementation has been made possible using a new concept of higher-level data structures for dynamical applications and configuration of the resources. The discussion shows how an implementation of...

    Provided By IARIA

  • White Papers // Oct 2011

    Reasoning on High Performance Computing Resources an Urgent Computing Scenario

    The emergent growing amount of available information and data in the last decade has led to very large data stocks that express specific knowledge. This knowledge can be stored in ontologies. Reasoning strategies are then required to deal with a huge amount of data even if the allotted time frame...

    Provided By IARIA

  • White Papers // Oct 2011

    Real-Time Processing and Archiving Strategies

    Today due to huge data growth, more digitization needs, mobile devices producing more data, faster supercomputer power, and applications, end user expect to store and archive their data in real-time and have continuously real-time access to that data. Keeping up with this fast growing demand of user behavior of \"Self-service\"...

    Provided By IARIA

  • White Papers // Oct 2011

    Open Access Business Model and Financial Issues

    The development of the information society and the widespread diffusion of information technology give rise to new opportunities for research and learning. Higher education institutions have been using Internet and other digital technologies to develop and distribute education and research results for several years. However, much of those materials were...

    Provided By IARIA

  • White Papers // Oct 2011

    Rotation-oriented Collaborative Air Traffic Management

    Considering developments in aviation industry and ICT a framework of further steps of integration in Air-Traffic Management is drafted. Intelligent management systems and distributed parallel data processing is envisioned for including sequences of flights into collaborative ATM. This includes options provided by latest developments regarding the Internet of Things as...

    Provided By IARIA

  • White Papers // Oct 2011

    GEMOM Middleware Self-Healing and Fault-Tolerance: A Highway Tolling Case Study

    Application of message-oriented communication in business critical systems has to cope with requirements for end-to-end intelligence, security, scalability, self-adaptation and fault-tolerance. To this extent, the GEnetic Message-Oriented Middleware (GEMOM) European Research Project focused on the design and development of a fast-forwarding message oriented middleware, endowed with robustness, resilience, self-adaptability, and...

    Provided By IARIA

  • White Papers // Oct 2011

    Software Product Line Agility

    Software reuse constitutes a significant challenge for different development communities, while systematic reuse is a difficult target to achieve. Software Product Line (SPL) has been nominated as one of the effective approaches promoting software reuse. In this paper, the authors propose the Enterprise Product Line Software Process (EPLSP) that integrates...

    Provided By IARIA

  • White Papers // Oct 2011

    An Agile Model-Driven Development Approach - A Case Study in a Finance Organization

    In the Sungard Front Arena, current software portfolio a business functionality called Market Server Capability (MSC) is embedded and duplicated in many components. By the application of Agile and Lean principles on model-driven development, the authors will get an Agile approach for constructing the architecture of a new MSC definition...

    Provided By IARIA

  • White Papers // Oct 2011

    A Planning Poker Tool for Supporting Collaborative Estimation in Distributed Agile Development

    Estimating and planning are critical to the success of any software project, also in the case of distributed agile development. Previous research has acknowledged that conventional agile methods need to be adjusted when applied in distributed contexts. However, the authors argue that also new tools are needed for enabling effective...

    Provided By IARIA

  • White Papers // Oct 2011

    Scrum Maturity Model: Validation for IT Organizations' Roadmap to Develop Software Centered on the Client Role

    Within the agile development methodologies context, the topic of client relationship management is strongly focused, mainly due to the importance of collaboration between the development team and its clients. Most clients avoid or are unable to develop a close cooperation with vendor organizations, since it requires a motivation and close...

    Provided By IARIA

  • White Papers // Jul 2011

    Next Generation Access Networks (NGANs) and the Geographical Segmentation of Markets

    Telecom infrastructures are facing unprecedented challenges with increasing demands on network capacity. Next Generation Networks (NGN) allows consumers to choose between different access network technologies to access their service environment. The arrival of NGAN (Next Generation Access Network) has implications for the competitive conditions in access markets that are still...

    Provided By IARIA

  • White Papers // Jul 2011

    Does Cloud Computing Matter? Networking IT and Services Value in Organizations

    In this paper, the authors discuss cloud computing value generation through four company case studies. They argue that cloud computing value is generated through the interactions of organization, IT and services. They further analyze their value networking activities, and then propose ANT as a lens to interpret the cloud computing...

    Provided By IARIA

  • White Papers // Jul 2011

    Performance Evaluation of Inter-Vehicle Communications Based on the Proposed IEEE 802.11p Physical and MAC Layers Specifications

    Traffic control, accidents prevention, vehicles automation and useful services to the drivers have always been goals of an intelligent traffic system. With this objective, the IEEE is finalizing its new standard: the IEEE 802.11p, which defines the vehicular ad-hoc networks physical and medium access control layers characteristics. This paper presents...

    Provided By IARIA

  • White Papers // Jul 2011

    Cooperative Vehicle Information Delivery Scheme for ITS Networks With OFDM Modulation Techniques

    Vehicular Ad hoc NETworks (VANETs) are new technologies that offer many opportunities to wide range interesting services. Safe driving applications in Intelligent Transport System (ITS) are major applications of VANETs. In the high-speed mobility environment of VANETs, failure transmission due to change of vehicle positions, fluctuation of channel condition and...

    Provided By IARIA

  • White Papers // Jul 2011

    An Adaptive Mechanism for Access Control in VANETs

    VANETs have the ability to transmit various types of information between a vehicle and another, or between a vehicle and a fixed station. However, transmission may be impaired due to long delays, quantity of collisions and signal noise. This is caused, in part, by abrupt changes in the network topology....

    Provided By IARIA

  • White Papers // Jul 2011

    Methodology of Dynamic Architectural Adaptation for Ad Hoc Networks Operating in Disturbed Environment

    Wireless networks and particularly ad hoc networks, are gaining in speed and capacity. These advances open the way to their use in emergent, increasingly complex applications. Such networks have to operate in disturbed environments where disturbances, mainly caused by fading and interferences, primarily originate by the physical layer. Congestions associated...

    Provided By IARIA

  • White Papers // Jul 2011

    A Regional City Council mGovernment Case Study: Success Factors for Acceptance and Trust

    This paper is the second of a series of investigations into the key success factors for mobile government services (mGovernment) in Australia, Jordan and the United Arab Republic. The case study in this paper concerns a large regional city council in Queensland, Australia. It provides valuable insights into the adoption...

    Provided By IARIA

  • White Papers // Jul 2011

    Evaluation of Buffer Size for Middleware Using Multiple Interface in Wireless Communication

    Although a variety of wireless interfaces are available on mobile devices, they still provide only low throughput so far. When coverage areas of these different technologies overlap, mobile devices with multiple interfaces can use them simultaneously by mechanism of Bandwidth Aggregation. However, there are some performance problems for Bandwidth Aggregation...

    Provided By IARIA

  • White Papers // Jul 2011

    Mobile Ad-Hoc Networks: An Experimentation System and Evaluation of Routing Algorithms

    The paper concerns the problem of path finding in wireless ad-hoc networks. Several algorithms, including metaheuristic algorithms, evolutionary algorithm and the created hybrid algorithm, are considered. Algorithms have been implemented into a designed experimentation system. The system allows making simulation experiments along with multistage experiment design. In the paper, the...

    Provided By IARIA

  • White Papers // Jul 2011

    Home Automation With IQRF Wireless Communication Platform: A Case Study

    This paper describes a new wireless communication platform IQRF. In the paper is description of main features of the platform, available communication modules, gateways to other wired and wireless communication system, and development tools. The paper also describes a case study focused on IQRF Smart house concept. IQRF platform was...

    Provided By IARIA

  • White Papers // Jul 2011

    Secure Packet Transfer in Wireless Sensor Networks - A Trust-Based Approach

    Trust is very important in wireless sensor networks to transfer the data from source to destination. The Dynamic Source Protocol calculates the alternate path, if any node fails to transfer the data. The Dynamic Source Protocol does not have any built-in functionality to calculate an alternate path if the path...

    Provided By IARIA

  • White Papers // Jul 2011

    Adaptive Techniques for Elimination of Redundant Handovers in Femtocells

    Dense deployment of femtocells in mobile wireless networks can significantly increase the amount of handover initiations. This paper analyzes new approach to elimination of redundant handovers. The innovative way dynamically updates current value of techniques commonly used for elimination of redundant handovers. The goal is to investigate the efficiency of...

    Provided By IARIA

  • White Papers // Jul 2011

    Reconfigurable Tactical Impulse Radio UWB for Communication and Indoor Localization

    The paper is focused on the design of a new reconfigurable tactical UWB impulse radio enabling indoor communication and localization for military application. The proposed system contains both a physical and a MAC (Medium Access Control) layer. It proposes to answer military needs for information sharing and for indoor localization...

    Provided By IARIA

  • White Papers // Jul 2011

    CQI Reporting Imperfections and Their Consequences in LTE Networks

    In modern wireless networks, the signal quality in wireless channel is estimated based on the channel quality measurements. The measurement results are used to select appropriate modulation and coding scheme for each transmission. The target of the link adaptation is to reach the desired block error rate operation point. Operation...

    Provided By IARIA

  • White Papers // Jul 2011

    HyRA: A Software-Defined Radio Architecture for Wireless Embedded Systems

    Traditional Software-Defined Radio (SDR) architectures cannot go with the requirements of embedded systems, specially in terms of performance and power consumption. Low-power FPGAs now reaching the market might soon become a viable alternative to overcome such limitations. The HYbrid Radio Architecture (HYRA) introduced in this paper contributes to this scenario...

    Provided By IARIA

  • White Papers // Jul 2011

    Motivations and Challenges of Global Mobility With Universal Identity: A Review

    Mobility in the enterprise is derived by both technology availability and the increase in user demand. The merging of 4G and WLAN networks prompts the needs of operators to increase their coverage with a blended service offering that makes best use of their old investments in legacy infrastructure, low price...

    Provided By IARIA

  • White Papers // Jul 2011

    A New Hybrid SPD-Based Scheduling for EPONs

    Dynamic Bandwidth Allocation (DBA) is a key issue of Ethernet PONs. In order to get higher resource utilization and lower packet delay, the problem is always dissolved into grant sizing and grant scheduling. In this paper, the authors explore grant scheduling techniques. They propose a modified Hybrid online and offline...

    Provided By IARIA

  • White Papers // Jul 2011

    Link Emulation on the Data Link Layer in a Linux-Based Future Internet Testbed Environment

    Protocol design and development is not a straightforward process. Each approach must be validated for interactions and side-effects in the existing network environments. But the Internet itself is not a good test environment, since its components are not controllable and certain problem situations (like congestion or error conditions) are difficult...

    Provided By IARIA

  • White Papers // Jul 2011

    User Utility Function as Quality of Experience (QoE)

    The realization of a user-centric paradigm will revolutionize future wireless networks. For this innovative concept to materialize, a paradigm shift is required from a long-term contractual based service delivery to a short-term contractual and dynamic service delivery concept. However this necessitates that translation of user satisfaction into network technical indices,...

    Provided By IARIA

  • White Papers // Jul 2011

    Tuning Self-Similar Traffic to Improve Loss Performance in Small Buffer Routers

    The issue of router buffer sizing is an important research problem and is still open though researchers have debated this for many years. The research method can be classified into two kinds: one is based on queuing theory, the other uses TCP as model. From the point of TCP model,...

    Provided By IARIA

  • White Papers // Jul 2011

    Performance Evaluation of Burst Deflection in OBS Networks Using Multi-Topology Routing

    This paper evaluates the combination of Optical Burst Switching (OBS) and Multi-Topology (MT) routing. Using MT routing, a source router has a choice of sending IP packets on several different paths to the destination. In OBS networks, deflection may reduce burst loss rate. The authors evaluate a deflection method that...

    Provided By IARIA

  • White Papers // Jul 2011

    Modeling and Evaluation of SWAP Scheduling Policy Under Varying Job Size Distributions

    Size-based scheduling policies have been shown to be effective resource allocation policies in computing and networked environments. One of the recently proposed size-based scheduling policy is called SWAP. It is a non-preemptive, threshold based policy that was proposed to approximate the Shortest Job First (SJF) policy by introducing service differentiation...

    Provided By IARIA

  • White Papers // Jul 2011

    Design Experience With Routing SW and Related Applications

    This paper deals with the current software architectures for intermediate systems for Intranet and small-range wireless interconnection using case studies founded on real-world applications. The approach demonstrates another contribution to network convergence in interconnecting software architecture development, which stems from a design experience based on industrial network applications and on...

    Provided By IARIA

  • White Papers // Jul 2011

    Adaptive Load Balanced Routing for 2-Dilated Flattened Butterfly Switching Network

    High-radix networks such as folded-Clos outperform other low radix networks in terms of cost and latency. The 2-Dilated Flattened Butterfly (2DFB) network is a non-blocking high-radix network with better path diversity and reduced diameter compared to the folded-Clos network. In this paper, the authors introduce an adaptive load balanced routing...

    Provided By IARIA

  • White Papers // Jul 2011

    A Review of IPv6 Multihoming Solutions

    Multihoming is simply defined as having connection to the Internet through more than one Internet service provider. Multihoming is a desired functionality with a growing demand because it provides fault tolerance and guarantees a continuous service for users. In the current Internet, which employs IPv4 as the network layer protocol,...

    Provided By IARIA

  • White Papers // Jul 2011

    An Analytic and Experimental Study on the Impact of Jitter Playout Buffer on the E-Model in VoIP Quality Measurement

    Over the years, the quality in Voice over IP (VoIP) applications has been defined from the perspective of VoIP service providers but not necessarily from the perspective of end-users. Conversational quality as perceived by end-users is affected by a wide variety of factors that are not exclusive to network performance....

    Provided By IARIA

  • White Papers // Jul 2011

    SIP Providers' Awareness of Media Connectivity

    Voice-over-IP (VoIP) has become an important service in the Internet. In contrast to the Public Switched Telephone Network where the delivery of all messages and streams is the responsibility of the calling parties' providers, VoIP media data is sent directly between the user agents without provider interaction in most cases....

    Provided By IARIA

  • White Papers // Jul 2011

    Improving SIP Authentication

    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 // Jul 2011

    Sensors Deployment Strategies for Rescue Applications in Wireless Sensor Networks

    Wireless Sensor networks (WS's) become a major tool for various security and surveillance applications to detect and monitor environmental changes, to control vehicle traffic, etc. For all these capabilities, the authors propose in this paper to use WS's in rescue applications. These applications are critical in terms of network response...

    Provided By IARIA

  • White Papers // Jul 2011

    UHF-RFID-Based Localization Using Spread-Spectrum Signals

    Determining the range between RFID tags and readers, particularly in the UHF region, is subject of current research topics. This paper presents a simulation-based approach, using spread-spectrum techniques to reckon the range between UHF RFID tags and a reader system. The UHFRFID reader reads out the surrounding tags within its...

    Provided By IARIA

  • White Papers // Jul 2011

    An Error Reduction Algorithm for Position Estimation Systems Using Transmitted Directivity Information

    The authors consider a position estimation system for tar-gets that exist in near wide area. The system has multiple sensors and estimates position using multiple receivers. Previously, receivers arranged in a straight line would generate a large position error in the direction of the line. In order to reduce this...

    Provided By IARIA

  • White Papers // Jul 2011

    A Dynamic Bandwidth Allocation Scheme for Interactive Multimedia Applications Over Cellular Networks

    Cellular networks played key role in enabling high level of bandwidth for users by employing traditional methods such as guaranteed QoS based on application category at radio access stratum level for various classes of QoS. Also, the newer multimode phones (e.g., phones that support LTE (Long Term Evolution standard), UMTS,...

    Provided By IARIA

  • White Papers // Jul 2011

    Distributed TDMA MAC Protocol With Source-Driven Combined Resource Allocation in Ad Hoc Networks

    MAC protocols for multimedia traffic transmission in mobile ad hoc networks have been studied steadily. It is still challenging to design an efficient protocol due to limited resource and multi-hop transmission property. CSMA-based MAC protocol is not suitable for multimedia traffic transmission due to hop-by-hop contention and collision. TDMA-based MAC...

    Provided By IARIA

  • White Papers // Jul 2011

    Loss Differentiation and Recovery in TCP Over Wireless Wide-Area Networks

    The increasing speed and coverage of Wireless Wide Area Networks (WWAN) has made technologies such as GPRS, UMTS, or HSDPA a popular way to access the Internet for both mobile and stationary users. However, depending on the scenario, WWAN can suffer from severe IP packet loss due to corruption, which...

    Provided By IARIA

  • White Papers // Jul 2011

    By Use of Frequency Diversity and High Priority in Wireless Packet Retransmissions

    In Orthogonal Frequency Division Multiple Access (OFDMA) systems, the delay of packets has a great impact on Quality of Service (QoS), especially for real-time transmission. The basic concept of resource allocation in an OFDMA system is to allocate a subcarrier to the user with the best channel condition in that...

    Provided By IARIA

  • White Papers // Jul 2011

    Kernel Monitor of Transport Layer Developed for Android Working on Mobile Phone Terminals

    In recent years, with the rapid growth of smart phone market, Android is drawing an attention as software platform of embedded system, used as a personal digital assistance developed by Google. While Android is taken notice for its flexible development of application software and expansion of the system, the authors...

    Provided By IARIA

  • White Papers // Jul 2011

    Path Selection in WiMAX Networks With Mobile Relay Stations

    Introduction of mobile relays into networks based on IEEE 802.16 standard brings new challenges. The paper proposes signaling mechanism for acquisition of channel state information for mobile relays and provides detail analysis of the amount of signaling overhead caused by their introduction. In addition, the investigation whether the connection of...

    Provided By IARIA

  • White Papers // Feb 2012

    Towards Opportunistic Data Dissemination in Mobile Phone Sensor Networks

    Recently, there has been a growing interest within the research community in developing opportunistic routing protocols. Many schemes have been proposed; however, they differ greatly in assumptions and in type of network for which they are evaluated. As a result, researchers have an ambiguous understanding of how these schemes compare...

    Provided By IARIA

  • White Papers // Feb 2012

    Selective Link Cost Alteration in Reservation-Based Multi-Hop Wireless Mesh Networks

    Link state protocol-driven wireless mesh networks are known for their flexible and highly scalable structure, due to a high degree of individuality, in terms of routing table generation in each connected node. QoS-focused research allows these nodes now to make accurate next-hop decisions based on QoS-sensitive routing metrics. This development...

    Provided By IARIA

  • White Papers // Feb 2012

    Reliable Technology for Wireless Mesh Networks With Low System Requirements

    In this paper IQMESH, new networking technology for wireless mesh networks, its basic principles and related routing algorithms are presented. The presented technology was developed especially for applications in the field of buildings automation and telemetry. However, other applications such as smart grids or street lighting can also benefit from...

    Provided By IARIA