Universidad Carlos III de Madrid

Displaying 1-40 of 42 results

  • White Papers // Oct 2013

    Evolution, Detection and Analysis of Malware for Smart Devices

    Smart devices equipped with powerful sensing, computing and networking capabilities have proliferated lately, ranging from popular Smartphone's and tablets to Internet appliances, smart TVs, and others that will soon appear (e.g., watches, glasses, and clothes). One key feature of such devices is their ability to incorporate third-party apps from a...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2012

    On the Distributed Construction of a Collision-Free Schedule in Multi-Hop Packet Radio Networks

    This paper introduces a protocol that distributively constructs a collision-free schedule for multi-hop packet radio networks in the presence of hidden terminals. As a preliminary step, each wireless station computes the schedule length after gathering information about the number of flows in its neighbourhood. Then, a combination of deterministic and...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Sep 2011

    Entry, Costs Reduction, and Competition in the Portuguese Mobile Telephony Industry

    The authors study the effect of entry on costs and competition in the Portuguese mobile telephony industry. They construct and estimate a model that includes demand, network, and cost equations. The latter accounts for inefficiency and cost reducing effort. Their results suggest that the entry of a third operator in...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2011

    A Novel Overlay Network for a Secure Global Home Agent Dynamic Discovery

    Mobile IP and Network Mobility are the IETF proposals to obtain mobility. However, both of them have routing limitations, due to the presence of an entity (Home Agent) in the communication path. Those problems have been tried to be solved in different ways. A family of solutions tries to improve...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2011

    Unrevealing the Structure of Live BitTorrent Swarms: Methodology and Analysis

    BitTorrent is one of the most popular applications in the current Internet. However, the authors still have little knowledge about the topology of real BitTorrent swarms and how the traffic is actually exchanged among peers. This paper addresses fundamental questions regarding the topology of live BitTorrent swarms. For this purpose...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    TREBOL: Tree-Based Routing and Address Autoconfiguration for Vehicle-to-Internet Communications

    Efficient vehicle-to-Internet routing and address autoconfiguration are two of the missing pieces required to provide Internet connectivity from vehicles. Here, the authors propose TREBOL, a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    Towards a Collision-Free WLAN: Dynamic Parameter Adjustment in CSMA/E2CA

    Carrier Sense Multiple Access with Enhanced Collision Avoidance (CSMA/ECA) is a distributed MAC protocol that allows collision-free access to the medium in WLANs. The only difference between CSMA/ECA and the well-known CSMA/CA is that the former uses a deterministic backoff after successful transmissions. Collision-free operation is reached after a transient...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    RAMS: A Protocol Extension to PMIPv6 for Improving Handover Performance of Multicast Traffic

    IP multicast allows the efficient support of group communication services. The increase in the use of multicast has also triggered the need for supporting IP multicast in mobile environments. It is necessary to consider current unicast mobility management solutions in IP-based networks to smoothly extend multicast services to mobile users....

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Bairoch Revisited: Tariff Structure And Growth In The Late Nineteenth Century

    This paper revisits Bairoch's hypothesis that in the late nineteenth century tariffs were positively associated with growth, as recently confirmed by a new generation of quantitative studies. This paper highlights the importance of the structure of protection in the relation between trade policy and its potential growth-promoting impact. Evidence is...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Optimized IPv6 Internet Access From Vehicles in Multi-Hop and Heterogeneous Environments

    In order to provide efficient Internet connectivity from vehicles, three fundamental functionalities are needed: IP address autoconfiguration, enhanced routing and mobility support. This paper provides a brief view of the work done so far in this research work that aims at providing a solution for these three open issues. Analytical...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Overhearing Assisted Optimization of Address Auto-Configuration in Position Aware VANETs

    Vehicular networks allow vehicles to exchange information that can be used to improve traffic efficiency and drivers' safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speeding up the global adoption of vehicular communication systems. One of...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    The Microeconomics Of Bullionism: Arbitrage, Smuggling And Silver Outflows In Spain In The Early 18th Century

    In the Early Modern period, there was a systematic flow of precious metals from the American colonies to Spain and Portugal and, from there, throughout the world. In this paper, the author uses newly discovered data on the black market for silver in Cadiz to reconstruct a picture of Castilian...

    Provided By Universidad Carlos III de Madrid

  • White Papers // May 2011

    Using NFC Technology for Fast-Tracking Large-Size Multi-Touch Screens

    Multi-touch technology interfaces are becoming ubiquitous since their integration in smart-phones, tablets and many consumer electronics devices. Depending on the size of the tangible interface, the computing resource restrictions and the resolution required, there are different technological alternatives for multi-touch screens such as camera based systems, capacity, resistive or pressure...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2011

    A Game Theoretic Approach to Selfishness in 802.11e WLANs

    The 802.11e standard opens the configuration of several MAC parameters, which makes WLANs vulnerable to users that selfishly configure these parameters to gain more throughput. In this paper, the authors propose a novel algorithm based on game theory to thwart this selfish behavior. The key idea of the algorithm is...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2011

    New Insights From the Analysis of Free Flow Vehicular Traffic in Highways

    Building vehicular networks in roads and highways is a challenging research topic with a large number of applications ranging from traffic jams and car collisions prevention to efficient route planning. The analysis of the distance between vehicles in roads is a key factor in, e.g., designing vehicular networks protocols or...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2011

    Configuration of IEEE 802.11e EDCA for Voice and Data Traffic: An Experimental Study

    In this paper, the authors conduct an experimental study of the Enhanced Distributed Channel Access (EDCA) mechanism of the IEEE 802.11e standard with a testbed consisting of 1 Access Point and 15 WLAN stations. The focus of their study is the proposal of guidelines for the configuration of the open...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2011

    Design and Experimental Evaluation of a Route Optimisation Solution for NEMO

    An important requirement for IP networks to achieve the aim of ubiquitous connectivity is NEtwork MObility (NEMO). With Network mobility support the authors can provide Internet access from mobile platforms, such as public transportation vehicles, to normal nodes that do not need to implement any special mobility protocol. The network...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2010

    TRIM: An Architecture for Transparent IMS-Based Mobility

    In recent years, the development and deployment of new wired and wireless access network technologies have made the ubiquitous Internet a reality. Users can access anywhere and any time to the broad set of value-added Internet services, which are delivered by means of the IP protocol. In this paper, 3GPP...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Oct 2010

    Network-Based Localized IP Mobility Management: Proxy Mobile IPv6 and Current Trends in Standardization

    IP mobility support has been a hot topic over the last years, recently fostered by the role of IP in the evolution of the 3G mobile communication networks. Standardization bodies, namely IETF, IEEE and 3GPP are working on different aspects of the mobility aiming at improving the mobility experience perceived...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2010

    Supporting mobility in an IMS-based P2P IPTV service: a Proactive Context Transfer mechanism

    In recent years, IPTV has received an increasing amount of interest from the industry, commercial providers and the research community, alike. In this paper, standardization bodies, such as ETSI and ITU-T, are specifying the architecture of IPTV systems based on IP multicast. An interesting alternative to support the IPTV service...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2010

    Synthesis of OCL Pre-Conditions for Graph Transformation Rules

    Graph Transformation (GT) is being increasingly used in Model Driven Engineering (MDE) to describe in-place transformations like animations and refactorings. For its practical use, rules are often complemented with OCL application conditions. The advancement of rule post-conditions into pre-conditions is a well-known problem in GT, but current techniques do not...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Feb 2010

    On the Energy Efficiency of IEEE 802.11 WLANs

    Understanding the energy consumption of wireless interfaces is critical to provide guidelines for the design and implementation of new protocols or interfaces. In this paper, the authors analyze the energy performance of an IEEE 802.11 WLAN. Their contributions are as follows: they present an accurate analytical model that is able...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Feb 2010

    Lessons Learned From the Deployment of a Multihop IEEE 802.11g Testbed Using COTS Devices

    A lot of attention has been given to multi-hop wireless networks lately, but further research is needed. This attention has motivated an increase in the number of 802.11- based deployments, both indoor and outdoor. These testbeds are used to run measurements in order to analyze and understand the limitation and...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2010

    Financial Crises And Financial Reforms In Spain: What Have We Learned?

    Like the rest of the world, Spain has suffered frequent financial crises and undergone several changes in its regulatory framework. There have been crises that have been followed by reforms of the financial structure, and also troubled financial times with no modification of the regulatory and supervisory regime. In various...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2010

    XEDU, a Framework for Developing XML-Based Didactic Resources

    Recent educational software applications use Web technologies like XML to improve teaching methods in distance learning environments. Though XML has been already used to implement a high number of didactic resources, specification methodologies to develop these resources are rarely applied. As a consequence, the reuse and maintenance of those resources...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Dec 2009

    The Econometrics Of Randomly Spaced Financial Data: A Survey

    This paper provides an introduction to the problem of modeling randomly spaced longitudinal data. Although Point Process theory was developed mostly in the sixties and early seventies, only in the nineties did this field of Probability theory attract the attention of researchers working in Financial Econometrics. The large increase, observed...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    FLaCoSt: A Novel Peer to Peer Architecture for Video Streaming in a Next Generation Network

    This paper proposes a peer-to-peer video streaming delivery system within the framework of Next Generation Networks using Application Level Multicast. Increased efficiency and reliability is achieved in two ways. First, the system uses path diversity by splitting the video traffic in several stripes and distributing each stripe via different multicast...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    FloorNet: Deployment and Evaluation of a Multihop Wireless 802.11 Testbed

    A lot of attention has been given to multihop wireless networks lately, but further research - in particular, through experimentation - is needed. This attention has motivated an increase in the number of 802.11-based deployments, both indoor and outdoor. These testbeds, which require a significant amount of resources during both...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    Qos and Authentication Experiences in a Residential Environment Within a Broadband Access Framework

    It is sometimes believed that a "Broadband access" network, providing ample transmission capacity to residential environments, is enough so as to allow a flawless delivery of advanced services. However, the provisioning of a combination of multiple services with guaranteed quality up to the end-user terminal requires a carefully designed architecture...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    Empirical Econometric Evaluation Of Alternative Methods Of Dealing With Missing Values In Investment Climate Surveys

    The Investment Climate Surveys (ICSs) are valuable instruments which improve the understanding of the economic, social, political and institutional factors determining economic growth, particularly in emerging and transition economies. However, at the same time, they have to overcome some difficult issues related with the quality of the information provided; measurement...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    The Eurodollar Revolution In Financial Technology. Deregulation, Innovation And Structural Change In Western Banking In The 1960s-70s

    The 1970s saw an explosion of financial innovations, both in instruments and strategies, which altered radically financial structures and financial decision-making worldwide. These transformations reversed four decades characterized by the absence of significant innovations in the banking industry, as well as by the pervasive regulation of financial systems by the...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Sep 2009

    Throughput and Energy Efficiency in IEEE 802.11 WLANs: Friends or Foes?

    Understanding and optimizing the energy consumption of wireless devices is critical to maximize network lifetime and to provide guidelines for the design of new protocols and interfaces. In this paper, the authors first provide an accurate analysis of the energy performance of an IEEE 802.11 WLAN, and then they derive...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2009

    Contributions for All-Optical Multicast Routing in WDM Networks

    WDM multicast networks are evolving towards all optical multicast routing, which is made up of several promising techniques designed to take advantage of light-trees (optical trees that avoid OEO conversions along the switching path). Although all-optical elements are not yet a mature technology, different research efforts held in this area...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2009

    NEMO: Network Mobility. Bringing Ubiquity to the Internet Access

    The success of cellular communications networks shows the interest of users in mobility. These networks are evolving to provide not only the traditional voice service, but also data services. IP appears to be the base technology of future networks, to provide all kinds of services and through different access technologies,...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2009

    Design of an SNMP Agent for OSGi Service Platforms

    On one hand, SNMP (Simple Network Management Protocol) allows integrating different enterprise elements connected through Internet into a standardized remote management. On the other hand, as a consequence of the success of Intelligent Houses they can be connected through Internet now by means of a residential gateway according to a...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2009

    Paying For The Liberal State: The Rise Of Public Finance In Nineteenth Century Europe

    Public finance is a major feature of the development of modern European societies, and it is at the heart of the definition of the nature of political regimes. Public finance is also a most relevant issue in the understanding of the constraints and possibilities of economic development. This paper is...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2009

    Subchannel, Bit and Power Allocation in Multiuser OFDM Systems for Goodput Optimization With Fairness

    This paper proposes a two-step method to maximize the good-put transmitted by the base station in multiuser orthogonal frequency division multiplexing systems based on sub-channel, bit and power allocation. The problem is formulated as a Binary Integer Programming (BIP) problem, in which the utility function to be optimized is modified...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2009

    A MAC Layer Abstraction for Heterogeneous Carrier Grade Mesh Networks

    Providing carrier grade services to a large number of mobile users is becoming an important challenge for wireless network operators. One promising solution for offering cost-efficient alternatives compared to classical cellular approaches is the use of wireless mesh networks along with the use of heterogeneous radio technologies. In this paper,...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2009

    Career Concerns And Investment Maturity In Mutual Funds

    An important puzzle in financial economics is why fund managers invest in short-maturity assets when they could obtain larger profits in assets with longer maturity. This paper provides an explanation to this fact based on labor contracts signed between institutional investors and fund managers. Using a career concern setup, the...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2009

    Assessing the Fidelity of COTS 802.11 Sniffers

    Recent measurement studies have analyzed WLAN performance by means of wireless sniffers that passively capture transmitted frames. Also, for relatively large (enterprise) WLAN scenarios, previous work has investigated multi-sniffer deployments with devices placed far apart in order to capture all traffic in the network (even frames transmitted simultaneously by different...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    Empirical Econometric Evaluation Of Alternative Methods Of Dealing With Missing Values In Investment Climate Surveys

    The Investment Climate Surveys (ICSs) are valuable instruments which improve the understanding of the economic, social, political and institutional factors determining economic growth, particularly in emerging and transition economies. However, at the same time, they have to overcome some difficult issues related with the quality of the information provided; measurement...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2009

    Career Concerns And Investment Maturity In Mutual Funds

    An important puzzle in financial economics is why fund managers invest in short-maturity assets when they could obtain larger profits in assets with longer maturity. This paper provides an explanation to this fact based on labor contracts signed between institutional investors and fund managers. Using a career concern setup, the...

    Provided By Universidad Carlos III de Madrid

  • White Papers // May 2011

    Using NFC Technology for Fast-Tracking Large-Size Multi-Touch Screens

    Multi-touch technology interfaces are becoming ubiquitous since their integration in smart-phones, tablets and many consumer electronics devices. Depending on the size of the tangible interface, the computing resource restrictions and the resolution required, there are different technological alternatives for multi-touch screens such as camera based systems, capacity, resistive or pressure...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    The Eurodollar Revolution In Financial Technology. Deregulation, Innovation And Structural Change In Western Banking In The 1960s-70s

    The 1970s saw an explosion of financial innovations, both in instruments and strategies, which altered radically financial structures and financial decision-making worldwide. These transformations reversed four decades characterized by the absence of significant innovations in the banking industry, as well as by the pervasive regulation of financial systems by the...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2010

    Financial Crises And Financial Reforms In Spain: What Have We Learned?

    Like the rest of the world, Spain has suffered frequent financial crises and undergone several changes in its regulatory framework. There have been crises that have been followed by reforms of the financial structure, and also troubled financial times with no modification of the regulatory and supervisory regime. In various...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    The Microeconomics Of Bullionism: Arbitrage, Smuggling And Silver Outflows In Spain In The Early 18th Century

    In the Early Modern period, there was a systematic flow of precious metals from the American colonies to Spain and Portugal and, from there, throughout the world. In this paper, the author uses newly discovered data on the black market for silver in Cadiz to reconstruct a picture of Castilian...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2011

    New Insights From the Analysis of Free Flow Vehicular Traffic in Highways

    Building vehicular networks in roads and highways is a challenging research topic with a large number of applications ranging from traffic jams and car collisions prevention to efficient route planning. The analysis of the distance between vehicles in roads is a key factor in, e.g., designing vehicular networks protocols or...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Feb 2010

    On the Energy Efficiency of IEEE 802.11 WLANs

    Understanding the energy consumption of wireless interfaces is critical to provide guidelines for the design and implementation of new protocols or interfaces. In this paper, the authors analyze the energy performance of an IEEE 802.11 WLAN. Their contributions are as follows: they present an accurate analytical model that is able...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Feb 2010

    Lessons Learned From the Deployment of a Multihop IEEE 802.11g Testbed Using COTS Devices

    A lot of attention has been given to multi-hop wireless networks lately, but further research is needed. This attention has motivated an increase in the number of 802.11- based deployments, both indoor and outdoor. These testbeds are used to run measurements in order to analyze and understand the limitation and...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2009

    Assessing the Fidelity of COTS 802.11 Sniffers

    Recent measurement studies have analyzed WLAN performance by means of wireless sniffers that passively capture transmitted frames. Also, for relatively large (enterprise) WLAN scenarios, previous work has investigated multi-sniffer deployments with devices placed far apart in order to capture all traffic in the network (even frames transmitted simultaneously by different...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Sep 2009

    Throughput and Energy Efficiency in IEEE 802.11 WLANs: Friends or Foes?

    Understanding and optimizing the energy consumption of wireless devices is critical to maximize network lifetime and to provide guidelines for the design of new protocols and interfaces. In this paper, the authors first provide an accurate analysis of the energy performance of an IEEE 802.11 WLAN, and then they derive...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2009

    A MAC Layer Abstraction for Heterogeneous Carrier Grade Mesh Networks

    Providing carrier grade services to a large number of mobile users is becoming an important challenge for wireless network operators. One promising solution for offering cost-efficient alternatives compared to classical cellular approaches is the use of wireless mesh networks along with the use of heterogeneous radio technologies. In this paper,...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2011

    Configuration of IEEE 802.11e EDCA for Voice and Data Traffic: An Experimental Study

    In this paper, the authors conduct an experimental study of the Enhanced Distributed Channel Access (EDCA) mechanism of the IEEE 802.11e standard with a testbed consisting of 1 Access Point and 15 WLAN stations. The focus of their study is the proposal of guidelines for the configuration of the open...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2011

    Unrevealing the Structure of Live BitTorrent Swarms: Methodology and Analysis

    BitTorrent is one of the most popular applications in the current Internet. However, the authors still have little knowledge about the topology of real BitTorrent swarms and how the traffic is actually exchanged among peers. This paper addresses fundamental questions regarding the topology of live BitTorrent swarms. For this purpose...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    TREBOL: Tree-Based Routing and Address Autoconfiguration for Vehicle-to-Internet Communications

    Efficient vehicle-to-Internet routing and address autoconfiguration are two of the missing pieces required to provide Internet connectivity from vehicles. Here, the authors propose TREBOL, a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    Towards a Collision-Free WLAN: Dynamic Parameter Adjustment in CSMA/E2CA

    Carrier Sense Multiple Access with Enhanced Collision Avoidance (CSMA/ECA) is a distributed MAC protocol that allows collision-free access to the medium in WLANs. The only difference between CSMA/ECA and the well-known CSMA/CA is that the former uses a deterministic backoff after successful transmissions. Collision-free operation is reached after a transient...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Optimized IPv6 Internet Access From Vehicles in Multi-Hop and Heterogeneous Environments

    In order to provide efficient Internet connectivity from vehicles, three fundamental functionalities are needed: IP address autoconfiguration, enhanced routing and mobility support. This paper provides a brief view of the work done so far in this research work that aims at providing a solution for these three open issues. Analytical...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Overhearing Assisted Optimization of Address Auto-Configuration in Position Aware VANETs

    Vehicular networks allow vehicles to exchange information that can be used to improve traffic efficiency and drivers' safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speeding up the global adoption of vehicular communication systems. One of...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    FLaCoSt: A Novel Peer to Peer Architecture for Video Streaming in a Next Generation Network

    This paper proposes a peer-to-peer video streaming delivery system within the framework of Next Generation Networks using Application Level Multicast. Increased efficiency and reliability is achieved in two ways. First, the system uses path diversity by splitting the video traffic in several stripes and distributing each stripe via different multicast...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    Qos and Authentication Experiences in a Residential Environment Within a Broadband Access Framework

    It is sometimes believed that a "Broadband access" network, providing ample transmission capacity to residential environments, is enough so as to allow a flawless delivery of advanced services. However, the provisioning of a combination of multiple services with guaranteed quality up to the end-user terminal requires a carefully designed architecture...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Sep 2011

    Entry, Costs Reduction, and Competition in the Portuguese Mobile Telephony Industry

    The authors study the effect of entry on costs and competition in the Portuguese mobile telephony industry. They construct and estimate a model that includes demand, network, and cost equations. The latter accounts for inefficiency and cost reducing effort. Their results suggest that the entry of a third operator in...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Oct 2010

    Network-Based Localized IP Mobility Management: Proxy Mobile IPv6 and Current Trends in Standardization

    IP mobility support has been a hot topic over the last years, recently fostered by the role of IP in the evolution of the 3G mobile communication networks. Standardization bodies, namely IETF, IEEE and 3GPP are working on different aspects of the mobility aiming at improving the mobility experience perceived...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jul 2011

    RAMS: A Protocol Extension to PMIPv6 for Improving Handover Performance of Multicast Traffic

    IP multicast allows the efficient support of group communication services. The increase in the use of multicast has also triggered the need for supporting IP multicast in mobile environments. It is necessary to consider current unicast mobility management solutions in IP-based networks to smoothly extend multicast services to mobile users....

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2011

    A Novel Overlay Network for a Secure Global Home Agent Dynamic Discovery

    Mobile IP and Network Mobility are the IETF proposals to obtain mobility. However, both of them have routing limitations, due to the presence of an entity (Home Agent) in the communication path. Those problems have been tried to be solved in different ways. A family of solutions tries to improve...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Mar 2010

    Synthesis of OCL Pre-Conditions for Graph Transformation Rules

    Graph Transformation (GT) is being increasingly used in Model Driven Engineering (MDE) to describe in-place transformations like animations and refactorings. For its practical use, rules are often complemented with OCL application conditions. The advancement of rule post-conditions into pre-conditions is a well-known problem in GT, but current techniques do not...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2011

    A Game Theoretic Approach to Selfishness in 802.11e WLANs

    The 802.11e standard opens the configuration of several MAC parameters, which makes WLANs vulnerable to users that selfishly configure these parameters to gain more throughput. In this paper, the authors propose a novel algorithm based on game theory to thwart this selfish behavior. The key idea of the algorithm is...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2008

    Advances in Ultralight-weight Cryptography for Low-Cost RFID Tags: Gossamer Protocol

    The design of ultralight-weight authentication protocols that conform to low-cost tag requirements is imperative. This paper analyzes the most important proposals (except for those based in hard problems such as the HB family) in the area and identifies the common weaknesses that have left all of them open to various...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2009

    Subchannel, Bit and Power Allocation in Multiuser OFDM Systems for Goodput Optimization With Fairness

    This paper proposes a two-step method to maximize the good-put transmitted by the base station in multiuser orthogonal frequency division multiplexing systems based on sub-channel, bit and power allocation. The problem is formulated as a Binary Integer Programming (BIP) problem, in which the utility function to be optimized is modified...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2012

    On the Distributed Construction of a Collision-Free Schedule in Multi-Hop Packet Radio Networks

    This paper introduces a protocol that distributively constructs a collision-free schedule for multi-hop packet radio networks in the presence of hidden terminals. As a preliminary step, each wireless station computes the schedule length after gathering information about the number of flows in its neighbourhood. Then, a combination of deterministic and...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Aug 2009

    Contributions for All-Optical Multicast Routing in WDM Networks

    WDM multicast networks are evolving towards all optical multicast routing, which is made up of several promising techniques designed to take advantage of light-trees (optical trees that avoid OEO conversions along the switching path). Although all-optical elements are not yet a mature technology, different research efforts held in this area...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2010

    XEDU, a Framework for Developing XML-Based Didactic Resources

    Recent educational software applications use Web technologies like XML to improve teaching methods in distance learning environments. Though XML has been already used to implement a high number of didactic resources, specification methodologies to develop these resources are rarely applied. As a consequence, the reuse and maintenance of those resources...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2009

    Design of an SNMP Agent for OSGi Service Platforms

    On one hand, SNMP (Simple Network Management Protocol) allows integrating different enterprise elements connected through Internet into a standardized remote management. On the other hand, as a consequence of the success of Intelligent Houses they can be connected through Internet now by means of a residential gateway according to a...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Oct 2008

    Waiting To Copy: On The Dynamics Of The Market For Technology

    The authors examine the appropriability problem of an inventor who brings to the market a successful innovation that can be legally copied. They study this problem in a dynamic model in which imitators can "Enter" the market either by copying the invention at a cost or by buying knowledge (a...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2011

    Bairoch Revisited: Tariff Structure And Growth In The Late Nineteenth Century

    This paper revisits Bairoch's hypothesis that in the late nineteenth century tariffs were positively associated with growth, as recently confirmed by a new generation of quantitative studies. This paper highlights the importance of the structure of protection in the relation between trade policy and its potential growth-promoting impact. Evidence is...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2010

    TRIM: An Architecture for Transparent IMS-Based Mobility

    In recent years, the development and deployment of new wired and wireless access network technologies have made the ubiquitous Internet a reality. Users can access anywhere and any time to the broad set of value-added Internet services, which are delivered by means of the IP protocol. In this paper, 3GPP...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Nov 2009

    FloorNet: Deployment and Evaluation of a Multihop Wireless 802.11 Testbed

    A lot of attention has been given to multihop wireless networks lately, but further research - in particular, through experimentation - is needed. This attention has motivated an increase in the number of 802.11-based deployments, both indoor and outdoor. These testbeds, which require a significant amount of resources during both...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Apr 2010

    Supporting mobility in an IMS-based P2P IPTV service: a Proactive Context Transfer mechanism

    In recent years, IPTV has received an increasing amount of interest from the industry, commercial providers and the research community, alike. In this paper, standardization bodies, such as ETSI and ITU-T, are specifying the architecture of IPTV systems based on IP multicast. An interesting alternative to support the IPTV service...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jan 2011

    Design and Experimental Evaluation of a Route Optimisation Solution for NEMO

    An important requirement for IP networks to achieve the aim of ubiquitous connectivity is NEtwork MObility (NEMO). With Network mobility support the authors can provide Internet access from mobile platforms, such as public transportation vehicles, to normal nodes that do not need to implement any special mobility protocol. The network...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Jun 2009

    NEMO: Network Mobility. Bringing Ubiquity to the Internet Access

    The success of cellular communications networks shows the interest of users in mobility. These networks are evolving to provide not only the traditional voice service, but also data services. IP appears to be the base technology of future networks, to provide all kinds of services and through different access technologies,...

    Provided By Universidad Carlos III de Madrid

  • White Papers // Dec 2009

    The Econometrics Of Randomly Spaced Financial Data: A Survey

    This paper provides an introduction to the problem of modeling randomly spaced longitudinal data. Although Point Process theory was developed mostly in the sixties and early seventies, only in the nineties did this field of Probability theory attract the attention of researchers working in Financial Econometrics. The large increase, observed...

    Provided By Universidad Carlos III de Madrid