University of Rome

Displaying 1-40 of 69 results

  • White Papers // Jan 2014

    A Configurable FPGA-Based Traffic Generator for High-Performance Tests of Packet Processing Systems

    For the evaluation of high-speed packet processing systems, high performance traffic generators are needed. They have to be configurable to produce various traffic patterns and achieve preferably full Gigabit link utilization. The evaluation of packet processing systems has become a critical task as current open-source - especially software - tools...

    Provided By University of Rome

  • White Papers // Nov 2013

    Connecting the Web with the Web of Things: Lessons Learned From Implementing a CoAP-HTTP Proxy

    The Constrained Application Protocol (CoAP) is a lightweight application layer protocol for the Internet of Things. CoAP is based on HTTP mechanisms to build RESTful web services. In contrast to HTTP, CoAP was designed for Machine-to-Machine (M2M) communication and uses a binary representation. This allows efficient transport and processing in...

    Provided By University of Rome

  • White Papers // Feb 2013

    Distributed IDM-STC Versus Cooperative OFDM for the Two-Hop Decode-and-Forward Multiple-Access Relay Channel

    This paper deals with the performance of two different access techniques for the Two-Hop Decode-and-Forward (DF) Multiple-Access Relay Channel (MARC) which includes multiple source and relay nodes. In particular, cooperative Orthogonal Frequency Division Multiplexing (cOFDM) is compared with distributed Interleave Division Multiplexing Space-Time Codes (dIDM-STC). While cOFDM requires strict synchronization...

    Provided By University of Rome

  • White Papers // Jan 2013

    System Level Modeling of Networks-on-Chip for Power Estimation and Design Space Exploration

    With a fast rising productivity and even faster rising integration densities, i.e., design productivity-gap, energy and power dissipation are critical topics in high level system design more than ever. Thermal aware system design, reliable power delivery, and the overall energy dissipation are only few crucial design properties. In this paper,...

    Provided By University of Rome

  • White Papers // Jul 2012

    Information Flow Security for Business Process Models - Just One Click Away

    When outsourcing tasks of a business process to a third party, information flow security becomes a critical issue. In particular implicit information leaks are an intriguing problem. Given a business process one could ask whether the execution of a confidential task is kept secret to a third party which can...

    Provided By University of Rome

  • White Papers // Jul 2012

    On Model Based Synthesis of Embedded Control Software

    Many Embedded Systems are indeed Software Based Control Systems (SBCSs) that is control systems whose controller consists of control software running on a microcontroller device. This motivates investigation on formal model based design approaches for control software. Given the formal model of a plant as a discrete time linear hybrid...

    Provided By University of Rome

  • White Papers // Jul 2012

    Automatic Control Software Synthesis for Quantized Discrete Time Hybrid Systems

    Many Embedded Systems are indeed Software Based Control Systems (SBCSs). An SBCS consists of two main subsystems: the controller and the plant. Typically, the plant is a physical system consisting, for example, of mechanical or electrical devices whereas the controller consists of control software running on a microcontroller. In an...

    Provided By University of Rome

  • White Papers // Mar 2012

    An OpenFlow-Based Testbed for Information Centric Networking

    Information-Centric Networking (ICN) is a novel networking paradigm which is attracting increasing attention by both academic and industrial researchers. In fact, it promises to provide technological solutions that best fit with the way in which Internet is actually utilized. Assessment of proposed solutions require appropriate experimental testbeds. In this context...

    Provided By University of Rome

  • White Papers // Mar 2012

    Supporting Information-Centric Functionality in Software Defined Networks

    The Information-Centric Networking (ICN) paradigm is expected to be one of the major innovation of the Future Internet An ICN can be characterized by some key components like: the content-centric request/reply paradigm for data distribution, route-by-name operations, and in-network caching. In this paper the authors focus on a framework for...

    Provided By University of Rome

  • White Papers // Mar 2012

    Temperature and On-Chip Crosstalk Measurement Using Ring Oscillators in FPGA

    Temperature management and signal integrity are two highly relevant challenges for nano scale CMOS devices. As temperature of integrated circuits affects the frequency of defect mechanisms' occurrence and consequently influences reliability, temperature monitoring is inevitable. To provide the necessary thermal sensors, different techniques are available. One is to use the...

    Provided By University of Rome

  • White Papers // Jan 2012

    An Autonomic Admission Control Policy for Distributed Web Systems

    This paper tackles the problem of autonomic admission control for web clusters. The main contribution of this paper is the proposal of a new session admission algorithm that self-configures a dynamic constraint on the rate of incoming new sessions to guarantee the respect of Service Level Agreements (SLA). Unlike other...

    Provided By University of Rome

  • White Papers // Jan 2012

    Self-Through Self-Learning: Overload Control for Distributed Web Systems

    Overload control is a challenging problem for web-based applications, which are often prone to unexpected surges of traffic. Existing solutions are still far from guaranteeing the necessary responsiveness under rapidly changing operative conditions. The authors contribute an original Self-Overload Control (SOC) algorithm that self-configures a dynamic constraint on the rate...

    Provided By University of Rome

  • White Papers // Jan 2012

    Defining and Using Profiles to Personalize and Manage Reconfigurable Services

    As ICT services are becoming more ubiquitous, mobile and personalized, the authors are witnessing an increasing importance of two related needs: the necessity of defining, managing and storing user-related information, e.g., preferences, personal data, characteristics of terminals and devices, settings of network parameters and of application parameters, etc., the necessity...

    Provided By University of Rome

  • White Papers // Sep 2011

    Performance Evaluation of the OCDM/WDM Technique for Optical Packet Switches

    The performance of the Optical Code Division Multiplexing/Wavelength Division Multiplexing (WDM/OCDM) technique for Optical Packet Switch is investigated. The impact on the performance of the impairment due to both Multiple Access Interference and Beat noise is studied. The Packet Loss Probability due to output packet contentions is evaluated as a...

    Provided By University of Rome

  • White Papers // Jul 2011

    MobiBar: Barrier Coverage With Mobile Sensors

    Critical homeland security applications such as monitoring zones contaminated by chemical or biological attacks and monitoring the spread of forest fires, require the timely creation of barrier of sensors along the border to be monitored. The strict time requirements and the hazardous nature of these contexts impede manual sensor positioning....

    Provided By University of Rome

  • White Papers // Jul 2011

    Evaluation of Switch-to-Switch Header Flit Protection Schemes in Networks-on-Chip

    Signal integrity and packet data protection against soft errors represent highly relevant challenges for Network-on-Chips (NoCs) regarding the shrinking of process technology. Therefore, data protection and error recovery strategies at the End-to-End level are the most convenient solutions considering overall implementation costs and performance penalties. Nevertheless, protection of packet header...

    Provided By University of Rome

  • White Papers // Mar 2011

    Network Topology Analysis in the Cloud

    In this paper, the authors demonstrate how Cloud resources can be used for scientific calculations in a cost effective manner. The target audience consists of researchers who have to calculate a large amount of data. The paper does not deliver new scientific results in the traditional way in the area...

    Provided By University of Rome

  • White Papers // Mar 2011

    Secure Access Node: an FPGA-based Security Architecture for Access Networks

    Providing network security is one of the most important tasks in today's Internet. Unfortunately, many users are not able to protect themselves and their networks. Therefore, the authors present a novel security concept to protect users by providing security measures at the Internet Service Provider (ISP) level. Already now, ISP...

    Provided By University of Rome

  • White Papers // Jan 2011

    Identification of Packet Exchange Patterns Based on Energy Detection: The Bluetooth Case

    A time-domain recognition of different wireless technologies may be obtained using energy detection. In this paper, an energy detector was implemented using the Universal Software Radio Peripheral SDR platform. The energy detector output allows the formation of a packet presence/absence diagram. Experimental results indicate that the observation of Bluetooth packet...

    Provided By University of Rome

  • White Papers // Jan 2011

    Social-Aware Stateless Forwarding in Pocket Switched Networks

    In this paper, the authors describe SANE, the first forwarding mechanism that combines the advantages of both social-aware and stateless approaches in pocket switched network routing. SANE is based on the observation - that they validate on real-world traces - that individuals with similar interests tend to meet more often....

    Provided By University of Rome

  • White Papers // Jan 2011

    An OSPF Enhancement for Energy Saving in IP Networks

    This paper deals with a strategy to save energy in an IP network during low traffic hours allowing a subset of IP router interfaces to be put in sleep mode by means of an Energy Aware Routing (EAR) strategy. The EAR is fully compatible with OSPF and is based on...

    Provided By University of Rome

  • White Papers // Jan 2011

    Enabling Backbone Networks to Sleep

    Today, backbone networks of Telecom operators deploy a large number of devices and links. This is mainly due to both redundancy purposes for network service reliability, and resource over-dimensioning for maintaining quality of service during rush hours. Unfortunately, current network devices do not have power management primitives, and have constant...

    Provided By University of Rome

  • White Papers // Jan 2011

    Discrete Time Optimal Solution for the Connection Admission Control Problem

    The Connection Admission Control (CAC) problem is formulated in this paper as a discrete time optimal control problem. The control variables account for the acceptance/ rejection of new connections and forced dropping of in-progress connections. These variables are constrained to meet suitable conditions which account for the QoS requirements (Link...

    Provided By University of Rome

  • White Papers // Jan 2011

    On the Exploitation of ACK Cancellation for Spatial Reuse in Unplanned Multi-Hop WLANs

    Spatial reuse is an important challenge in multi-cell WLAN networks, such as ad-hoc and mesh networks, as well as sectorized antenna WLANs. However, the asynchronous handshake employed in the 802.11 MAC protocol is a severe limiting factor. Multiple parallel communications occurring between transmit/receive node pairs separated by a sufficient distance...

    Provided By University of Rome

  • White Papers // Jan 2011

    Hybrid Modelling of Ultra Wide Band Self-Organizing Networks

    Hybrid systems formalism is used to derive a model for a self-organizing network of nodes that operate according to the UWB principle. The authors model the rules that lead to the formation of the network and in particular an admission control procedure that is capable to handle both continuous and...

    Provided By University of Rome

  • White Papers // Jan 2011

    Detailed Analysis of TCP Fairness Issues in IEEE 802.11 Networks and Their Solution Using a Rate Control Approach

    In this paper, the authors study the problem of maintaining fairness for TCP connections in Wireless Local Area Networks (WLANs) based upon the IEEE 802.11 standard. Current implementations of 802.11 use the so-called Distributed Coordination Function (DCF) which provides similar medium access priority to all stations. Although this mode of...

    Provided By University of Rome

  • White Papers // Dec 2010

    Monitoring and Control of Temperature in Networks-on-Chip

    Increasing integration densities and the emergence of nanotechnology cause issues related to reliability and power consumption to become dominant factors for the design of modern multi-core systems. Since the arising problems are enforced by high circuit temperatures, monitoring and control of on-chip temperature profiles need to be considered during design...

    Provided By University of Rome

  • White Papers // Sep 2010

    Monetary Policy And The Housing Market: A Structural Factor Analysis

    This paper estimates a Structural Dynamic Factor Model on a panel of 102 US quarterly series. The authors model economic comovements by means of five underlying structural shocks (oil price, productivity, aggregate demand, monetary policy, and housing demand). The results of the benchmark model (impulse responses and variance decomposition) are...

    Provided By University of Rome

  • White Papers // Sep 2010

    System Level Power Estimation of System-on-Chip Interconnects in Consideration of Transition Activity and Crosstalk

    As technology reaches nanoscale order, interconnection systems account for the largest part of power consumption in Systems-on-Chip (SoC). Hence, an early and sufficiently accurate power estimation technique is needed for making the right design decisions. In this paper, the authors present a method for system-level power estimation of interconnection fabrics...

    Provided By University of Rome

  • White Papers // Aug 2010

    Show Me Your Friends and I'll Tell You What You Like

    Pocket Switched Networks (PSN), where humans carry short-range communicating devices such as PDAs, lap-tops, or smart phones, have attracted the attention of many researchers in recent years. These networks, whose main feature is the social-guided movements of users/devices, are considered to be a key technology to provide innovative services to...

    Provided By University of Rome

  • White Papers // Aug 2010

    Utilizing Parallelism of TMR to Enhance Power Efficiency of Reliable ASIC Designs

    Due to aggressive scaling, reliability issues influence the design process of integrated circuits more and more. A well known technique to tackle these issues represents Triple Modular Redundancy (TMR). It strongly improves reliability of a design at the expense of at least tripled area and power consumption. In this contribution,...

    Provided By University of Rome

  • White Papers // Jun 2010

    Towards Component Orientation in Embedded Web Service Environments

    Service-oriented architectures and systems designs are powerful concerning reusability of functional blocks and hiding implementation details from functional interfaces. But to compose a complete application, often central entities and engines are required for processing a specific sequence of service. In component-based designs the component itself is capable of describing both...

    Provided By University of Rome

  • White Papers // Jun 2010

    WS4D: Toolkits for networked embedded systems based on the Devices Profile for Web Services

    As the application of the Internet Protocol (IP) is not longer restricted to the internet and computer networks, future IP-based application scenarios require an enormous diversity of heterogeneous platforms and systems. Thereby emerging communication architectures, concepts, technologies and protocols must be capable of handling thousands of devices and communication endpoints...

    Provided By University of Rome

  • White Papers // May 2010

    Trading Hardware Overhead for Communication Performance in Mesh-Type Topologies

    Due to growing integration densities and increasing use of modular design approaches, embedded systems and System-on-Chip (SoC) are becoming increasingly communication-oriented. Thus, these complex systems necessitate flexible and high-performance communication subsystems capable of handling data rates of multiple Gbit/s. Network-on-Chip (NoC) is a new paradigm for such on-chip interconnection and...

    Provided By University of Rome

  • White Papers // Apr 2010

    Leakage-Resilient Storage

    The authors study a problem of secure data storage on hardware that may leak information. This paper introduces a new primitive that the authors call Leakage-Resilient Storage (LRS), which is an (Unkeyed) scheme for encoding messages, and can be viewed as a generalization of the All-Or-Nothing Transform (AONT, Rivest 1997)....

    Provided By University of Rome

  • White Papers // Apr 2010

    Achieving Scalability in the UPMT Mobility Management Solution

    UPMT (Universal Per-application Mobility management using Tunnels) has been proposed as an application level solution for mobility management. Main features of UPMT are the "Per-application" handover and the full compatibility with legacy applications, legacy hosts and existing networking infrastructure. A critical issue of the existing proposal is the scalability, as...

    Provided By University of Rome

  • White Papers // Mar 2010

    Financial Development And Selection Into Entrepreneurship: Evidence From Italy And US

    The existence of capital market imperfections causes business investment decisions to be strongly dependent on households' private wealth allocation. The author claims that if a link exists between private wealth and business decisions, it should be stronger in countries with less developed capital markets. Here, the author tests this theoretical...

    Provided By University of Rome

  • White Papers // Mar 2010

    Topology Reconfiguration in IEEE 802.15.4 WPANs for Emergency Management

    Communication networks play a fundamental role in the response to massive catastrophes. In case of emergency, the main purpose of public authorities is to avoid damages for people and for buildings and the presence of a reliable communication infrastructure is vital. In this context, the use of IEEE 802.15.4 Wireless...

    Provided By University of Rome

  • White Papers // Mar 2010

    Gymkhana: A Connectivity-Based Routing Scheme for Cognitive Radio Ad Hoc Networks

    The topology of a cognitive radio ad hoc network is highly influenced by the behavior of both licensed (primary) and unlicensed (secondary) users. In fact, the network connectivity could be impaired by the activity of primary users. This aspect has a significant impact on the design of routing protocols. The...

    Provided By University of Rome

  • White Papers // Mar 2010

    Modeling Temperature Distribution in Networks-on-Chip Using RC-Circuits

    As transistor dimensions are shrinking into regions of only a few atomic layers, designers are faced with various problems including increased reliability and power issues. Since, these problems are amplified by higher circuit temperatures; in this paper, the authors propose an approach for the fine-grained modeling of temperature distribution in...

    Provided By University of Rome

  • White Papers // Jan 2013

    System Level Modeling of Networks-on-Chip for Power Estimation and Design Space Exploration

    With a fast rising productivity and even faster rising integration densities, i.e., design productivity-gap, energy and power dissipation are critical topics in high level system design more than ever. Thermal aware system design, reliable power delivery, and the overall energy dissipation are only few crucial design properties. In this paper,...

    Provided By University of Rome

  • White Papers // Mar 2010

    Modeling Temperature Distribution in Networks-on-Chip Using RC-Circuits

    As transistor dimensions are shrinking into regions of only a few atomic layers, designers are faced with various problems including increased reliability and power issues. Since, these problems are amplified by higher circuit temperatures; in this paper, the authors propose an approach for the fine-grained modeling of temperature distribution in...

    Provided By University of Rome

  • White Papers // Nov 2008

    Differences and Commonalities of Service-Oriented Device Architectures, Wireless Sensor Networks and Networks-On-Chip

    Device centric Service-Oriented Architectures (SOA) have shown to be applicable in the automation industry for interconnecting manufacturing devices and enterprise systems, thus, establishing comprehensive, heterogeneous service architecture. A similar scenario can also be found in the domain of integrated circuits where a growing number of components are being interconnected by...

    Provided By University of Rome

  • White Papers // Jul 2006

    Mixed Gates: Leakage Reduction Techniques Applied to Switches for On-Chip Networks

    The reduction of power dissipation is a primary concern of current research in the field of integrated circuits. However, the user demand for high mobility and long operation time, especially of battery-operated devices, is contrary to the demand for high performance. Both demands could be satisfied for decades by aggressive...

    Provided By University of Rome

  • White Papers // Mar 2010

    Financial Development And Selection Into Entrepreneurship: Evidence From Italy And US

    The existence of capital market imperfections causes business investment decisions to be strongly dependent on households' private wealth allocation. The author claims that if a link exists between private wealth and business decisions, it should be stronger in countries with less developed capital markets. Here, the author tests this theoretical...

    Provided By University of Rome

  • White Papers // Apr 2010

    Leakage-Resilient Storage

    The authors study a problem of secure data storage on hardware that may leak information. This paper introduces a new primitive that the authors call Leakage-Resilient Storage (LRS), which is an (Unkeyed) scheme for encoding messages, and can be viewed as a generalization of the All-Or-Nothing Transform (AONT, Rivest 1997)....

    Provided By University of Rome

  • White Papers // Jun 2009

    An Introduction to Simulation-Based Techniques for Automated Service Composition

    This work is an introduction to the author's contributions to the SOC area, resulting from his PhD research activity. It focuses on the problem of automatically composing a desired service, given a set of available ones and a target specification. As for description, services are represented as finite-state transition systems,...

    Provided By University of Rome

  • White Papers // Jan 2011

    Discrete Time Optimal Solution for the Connection Admission Control Problem

    The Connection Admission Control (CAC) problem is formulated in this paper as a discrete time optimal control problem. The control variables account for the acceptance/ rejection of new connections and forced dropping of in-progress connections. These variables are constrained to meet suitable conditions which account for the QoS requirements (Link...

    Provided By University of Rome

  • White Papers // Jan 2011

    On the Exploitation of ACK Cancellation for Spatial Reuse in Unplanned Multi-Hop WLANs

    Spatial reuse is an important challenge in multi-cell WLAN networks, such as ad-hoc and mesh networks, as well as sectorized antenna WLANs. However, the asynchronous handshake employed in the 802.11 MAC protocol is a severe limiting factor. Multiple parallel communications occurring between transmit/receive node pairs separated by a sufficient distance...

    Provided By University of Rome

  • White Papers // Mar 2010

    Topology Reconfiguration in IEEE 802.15.4 WPANs for Emergency Management

    Communication networks play a fundamental role in the response to massive catastrophes. In case of emergency, the main purpose of public authorities is to avoid damages for people and for buildings and the presence of a reliable communication infrastructure is vital. In this context, the use of IEEE 802.15.4 Wireless...

    Provided By University of Rome

  • White Papers // Jul 2009

    A Distributed Procedure for IEEE 802.15.4 PAN Coordinator Election in Emergency Scenarios

    In an emergency scenario, the presence of a reliable communication infrastructure is fundamental. In response to massive catastrophes, like earthquakes, floods, fires, etc., public authorities are expected to undertake actions to control and limit damages for people and for buildings. To this aim, security agents are dispatched to the emergency...

    Provided By University of Rome

  • White Papers // Jun 2009

    Self-Configuration of IEEE 802.15.4 Wireless PANs for Urban Applications

    Pervasive sensor devices are expected to flood the urban environments of the future to provide citizens with specific services. Such services will be based on the monitoring of a multiplicity of urban parameters such as the level of the acoustic/environmental pollution, the presence of traffic jams, specific cultural events, etc....

    Provided By University of Rome

  • White Papers // May 2009

    Modeling Non Performing Loans Probability In The Commercial Banking System: Efficiency And Effectiveness Related To Credit Risk In Italy

    In this paper, the authors model the effect of the non performing loans on the cost structure of the commercial banking system. With this aim, they comment on an increase in the non performing loans by studying the consequences of such a change on the cost function and compute the...

    Provided By University of Rome

  • White Papers // Sep 2009

    The Sources Of Happiness: Evidence From The Investment Game

    The present paper draws on data collected in an investment game plus a questionnaire to investigate whether happiness is affected by circumstances and/or outcomes of the game and to evaluate which motivations or preference structures (self-interested preferences, inequity aversion, altruism, warm glow, social-welfare preferences, trust or reciprocity) may explain such...

    Provided By University of Rome

  • White Papers // Sep 2010

    Monetary Policy And The Housing Market: A Structural Factor Analysis

    This paper estimates a Structural Dynamic Factor Model on a panel of 102 US quarterly series. The authors model economic comovements by means of five underlying structural shocks (oil price, productivity, aggregate demand, monetary policy, and housing demand). The results of the benchmark model (impulse responses and variance decomposition) are...

    Provided By University of Rome

  • White Papers // Nov 2008

    Banks' Centrality In Corporate Interlock Networks: Evidences In Italy

    The idea that the governance mechanisms affect firms' performance is well acknowledged in management literature. The settings prevailing in governance studies explain board's roles at the light of the agency theory framework but complementary perspective is focused on the acquisition of critical resources from firms' environment. One such kind of...

    Provided By University of Rome

  • White Papers // Jan 2011

    Hybrid Modelling of Ultra Wide Band Self-Organizing Networks

    Hybrid systems formalism is used to derive a model for a self-organizing network of nodes that operate according to the UWB principle. The authors model the rules that lead to the formation of the network and in particular an admission control procedure that is capable to handle both continuous and...

    Provided By University of Rome

  • White Papers // Jan 2011

    Identification of Packet Exchange Patterns Based on Energy Detection: The Bluetooth Case

    A time-domain recognition of different wireless technologies may be obtained using energy detection. In this paper, an energy detector was implemented using the Universal Software Radio Peripheral SDR platform. The energy detector output allows the formation of a packet presence/absence diagram. Experimental results indicate that the observation of Bluetooth packet...

    Provided By University of Rome

  • White Papers // Mar 2011

    Network Topology Analysis in the Cloud

    In this paper, the authors demonstrate how Cloud resources can be used for scientific calculations in a cost effective manner. The target audience consists of researchers who have to calculate a large amount of data. The paper does not deliver new scientific results in the traditional way in the area...

    Provided By University of Rome

  • White Papers // Feb 2013

    Distributed IDM-STC Versus Cooperative OFDM for the Two-Hop Decode-and-Forward Multiple-Access Relay Channel

    This paper deals with the performance of two different access techniques for the Two-Hop Decode-and-Forward (DF) Multiple-Access Relay Channel (MARC) which includes multiple source and relay nodes. In particular, cooperative Orthogonal Frequency Division Multiplexing (cOFDM) is compared with distributed Interleave Division Multiplexing Space-Time Codes (dIDM-STC). While cOFDM requires strict synchronization...

    Provided By University of Rome

  • White Papers // Jul 2012

    Information Flow Security for Business Process Models - Just One Click Away

    When outsourcing tasks of a business process to a third party, information flow security becomes a critical issue. In particular implicit information leaks are an intriguing problem. Given a business process one could ask whether the execution of a confidential task is kept secret to a third party which can...

    Provided By University of Rome

  • White Papers // May 2009

    Declarative Models for Business Processes and UI Generation

    This paper presents an approach to model business processes and associated user interfaces in a declarative way, relying on constraints. An UML based meta-model to define processes, activities and user-interface objects is proposed. Connecting activities and user interface objects in an integrated model allows expressing interdependencies and mutual effects. Flexible...

    Provided By University of Rome

  • White Papers // Dec 2007

    Using Natural Language for Database Design

    In this paper, the authors deal with a natural language dialogue tool for supporting the database design process. They want to illustrate how natural language (German) can be used for obtaining a skeleton design and for supporting the acquisition of semantics of the prospective database. The approach is based on...

    Provided By University of Rome

  • White Papers // Jan 2012

    An Autonomic Admission Control Policy for Distributed Web Systems

    This paper tackles the problem of autonomic admission control for web clusters. The main contribution of this paper is the proposal of a new session admission algorithm that self-configures a dynamic constraint on the rate of incoming new sessions to guarantee the respect of Service Level Agreements (SLA). Unlike other...

    Provided By University of Rome

  • White Papers // Jan 2011

    An OSPF Enhancement for Energy Saving in IP Networks

    This paper deals with a strategy to save energy in an IP network during low traffic hours allowing a subset of IP router interfaces to be put in sleep mode by means of an Energy Aware Routing (EAR) strategy. The EAR is fully compatible with OSPF and is based on...

    Provided By University of Rome

  • White Papers // Sep 2011

    Performance Evaluation of the OCDM/WDM Technique for Optical Packet Switches

    The performance of the Optical Code Division Multiplexing/Wavelength Division Multiplexing (WDM/OCDM) technique for Optical Packet Switch is investigated. The impact on the performance of the impairment due to both Multiple Access Interference and Beat noise is studied. The Packet Loss Probability due to output packet contentions is evaluated as a...

    Provided By University of Rome

  • White Papers // Jun 2009

    UWB Body Area Network Coexistence by Interference Mitigation

    This paper analyzes the performance of a BAN composed of IEEE 802.15.4a Ultra Wide Band (UWB) sensors in terms of Bit Error Rate (BER), BAN throughput and network lifetime. The BAN performance is evaluated in presence of an external Low Data Rate (LDR) interfering network, that the authors suppose represented...

    Provided By University of Rome

  • White Papers // Jun 2009

    Streamline: An Optimal Distribution Algorithm for Peer-to-Peer Real-Time Streaming

    In this paper, the authors propose and evaluate an overlay distribution algorithm for P2P, chunk-based, streaming systems over forest-based topologies. In such systems, the stream is divided in chunks; chunks are delivered by each node in a store-and-forward way. A relaying node starts distributing a chunk only when it has...

    Provided By University of Rome

  • White Papers // Mar 2012

    An OpenFlow-Based Testbed for Information Centric Networking

    Information-Centric Networking (ICN) is a novel networking paradigm which is attracting increasing attention by both academic and industrial researchers. In fact, it promises to provide technological solutions that best fit with the way in which Internet is actually utilized. Assessment of proposed solutions require appropriate experimental testbeds. In this context...

    Provided By University of Rome

  • White Papers // Apr 2010

    Achieving Scalability in the UPMT Mobility Management Solution

    UPMT (Universal Per-application Mobility management using Tunnels) has been proposed as an application level solution for mobility management. Main features of UPMT are the "Per-application" handover and the full compatibility with legacy applications, legacy hosts and existing networking infrastructure. A critical issue of the existing proposal is the scalability, as...

    Provided By University of Rome

  • White Papers // Aug 2009

    UPMT: Universal Per-Application Mobility Management Using Tunnels

    In this paper, the authors describe an application level Mobility Management mechanism for IP networks, called UPMT (Universal Per-Application Mobility management using Tunnels). The mechanism is able to provide Vertical Handovers over heterogeneous IP based access networks on a per-application basis, i.e. it is possible to independently route different applications...

    Provided By University of Rome

  • White Papers // Aug 2009

    Design and Implementation of Mobile Electronic Memos: A Tool to Capture and Share Information in Mobile Environments

    This paper introduces "MEMs" (Mobile Electronic Memos). MEMs are electronic notes consisting of a data structure associated with a specific class of information (e.g. information describing a location, a person, a service, or a Web site), and meta-information, used for management. Users can automatically capture MEMs from the environment or...

    Provided By University of Rome

  • White Papers // Aug 2008

    A Theory-Driven Distribution Algorithm for Peer-to-Peer Real Time Streaming

    Many distribution algorithms have been proposed up to now for P2P real time streaming. However, due to the lack of basic theoretical results and bounds, common sense and intuitions and heuristics have driven their design so far. The consequence is that the authors can find in the literature a large...

    Provided By University of Rome

  • White Papers // Mar 2007

    Service-Oriented Architectures for Embedded Systems Using Devices Profile for Web Services

    In recent years, a movement from distributed systems controlled by users to automatic, autonomous and self-configuring distributed systems is noticeable. Web services is one approach but lacking the secure integration of resource-constraint devices. This paper describes the Devices Profile for Web Services (DPWS), underlying protocols and a DPWS toolkit implementation...

    Provided By University of Rome

  • White Papers // Sep 2010

    System Level Power Estimation of System-on-Chip Interconnects in Consideration of Transition Activity and Crosstalk

    As technology reaches nanoscale order, interconnection systems account for the largest part of power consumption in Systems-on-Chip (SoC). Hence, an early and sufficiently accurate power estimation technique is needed for making the right design decisions. In this paper, the authors present a method for system-level power estimation of interconnection fabrics...

    Provided By University of Rome

  • White Papers // Feb 2006

    Adaptive Hardware in Autonomous and Evolvable Embedded Systems

    Meeting the high demands of outer space missions requires immense efforts and is exceedingly time consuming. For the latest accomplished missions, the engineering of the hardware and computing systems took years and must be completed before launch. The architecture of a Network-on-Chip (NoC) based System-on-Chip (SoC) is presented in this...

    Provided By University of Rome

  • White Papers // May 2010

    Trading Hardware Overhead for Communication Performance in Mesh-Type Topologies

    Due to growing integration densities and increasing use of modular design approaches, embedded systems and System-on-Chip (SoC) are becoming increasingly communication-oriented. Thus, these complex systems necessitate flexible and high-performance communication subsystems capable of handling data rates of multiple Gbit/s. Network-on-Chip (NoC) is a new paradigm for such on-chip interconnection and...

    Provided By University of Rome

  • White Papers // Jun 2010

    Towards Component Orientation in Embedded Web Service Environments

    Service-oriented architectures and systems designs are powerful concerning reusability of functional blocks and hiding implementation details from functional interfaces. But to compose a complete application, often central entities and engines are required for processing a specific sequence of service. In component-based designs the component itself is capable of describing both...

    Provided By University of Rome

  • White Papers // Mar 2007

    E-Core - A Configurable IP Core for Application-Specific NoC Performance Evaluation

    During the last years, Network-on-Chips (NoCs) have become a true alternative for the design of complex integrated System-on-Chips (SoCs). Although NoCs are widely used in ASIC design for complex and multiprocessor SoCs, The authors mainly address NoCs on FPGAs where aspects like increasing design complexity, parasitics, and end-to-end latency have...

    Provided By University of Rome

  • White Papers // Dec 2010

    Monitoring and Control of Temperature in Networks-on-Chip

    Increasing integration densities and the emergence of nanotechnology cause issues related to reliability and power consumption to become dominant factors for the design of modern multi-core systems. Since the arising problems are enforced by high circuit temperatures, monitoring and control of on-chip temperature profiles need to be considered during design...

    Provided By University of Rome