VTT

Displaying 1-21 of 21 results

  • White Papers // Feb 2013

    Secondary Terrestrial Use of Broadcasting Satellite Services Below 3 GHz

    Secondary use of the satellite spectrum by a terrestrial system is studied in this paper, focusing on broadcasting satellite services. Both spectrum sensing based access and database based access are discussed. Link budget analysis is used to define operational limits for spectrum sensing and transmission power control when the primary...

    Provided By VTT

  • White Papers // Feb 2012

    Using Built-In Domain-Specific Modeling Support to Guide Model-Based Test Generation

    The authors present a model-based testing approach to support automated test generation with domain-specific concepts. This includes a language expert who is an expert at building test models and domain experts who are experts in the domain of the system under-test. First, they provide a framework to support the language...

    Provided By VTT

  • White Papers // Jan 2011

    Ambient Networks Gateway Selection Architecture

    Many anticipate a future wireless world filled by a multitude of user devices and wireless technologies. Effective management of this kind of heterogeneous, mobile, and rapidly changing ad hoc networks will be a challenging task. The authors present and evaluate the Ambient Networks Gateway Selection Architecture (GSA), which provides support...

    Provided By VTT

  • White Papers // Dec 2010

    Optical Road Monitoring of the Future Smart Roads - Preliminary Results

    It has been shown that in most accidents the driver is responsible due to being distracted or misjudging the situation. In order to solve such problems research has been dedicated to developing driver assistance systems that are able to monitor the traffic situation around the vehicle. This paper presents methods...

    Provided By VTT

  • White Papers // Aug 2010

    Towards a Taxonomy of Dynamic Invariants in Software Behaviour

    The use of dynamic invariants to describe software behaviour has gained increasing popularity and various tools and techniques for mining and using these invariants have been published. Typically, these invariants are used to support various software engineering tasks, such as testing and debugging which require one to understand and be...

    Provided By VTT

  • White Papers // Jul 2010

    Dynamic Cross-Layer Adaptation of Scalable Video in Wireless Networking

    The recent trend in Internet traffic indicates the proliferation of usage of multimedia services where a substantial part is related to some sort of video transmission. Moreover, an increasing number of Internet users employ wireless access technologies. High-quality video streaming over wireless access in unison with great mobility brings challenges...

    Provided By VTT

  • White Papers // May 2010

    Data Integration, Pathway Analysis and Mining for Systems Biology

    Post-genomic molecular biology embodies high-throughput experimental techniques and hence is a data-rich field. The goal of this paper is to develop bioinformatics methods to utilize publicly available data in order to produce knowledge and to aid mining of newly generated data. As an example of knowledge or hypothesis generation, consider...

    Provided By VTT

  • White Papers // Oct 2009

    Using Model-Based Testing for Testing Application Models in the Context of Domain-Specific Modelling

    With the advancement in Domain-Specific Modelling (DSM), the productivity and quality in software development has also enhanced. Inspite of these gains, there is still a need to test these modeled applications prior to release. For testing these models traditional testing approaches can also be applied. Though with DSM, testing generated...

    Provided By VTT

  • White Papers // Sep 2009

    Empirical Evaluation of Mobile WiMAX With MIMO

    Mobile WiMAX is claimed to have the greatest potential of all wireless access technologies already in the markets with respect to network capacity, range, mobility, and quality of service support. Mobile WiMAX has also adopted MIMO as an essential element for increasing capacity and data propagation reliability. However, there are...

    Provided By VTT

  • White Papers // Aug 2009

    On the Performance Gains of VoIP Aggregation and ROHC Over a WirelessMAN-OFDMA Air Interface

    A growing number of mobile WiMAX deployments are in progress worldwide and the technology is anticipated to play a key role in next generation mobile broadband wireless networks. However, although the theoretical potential of WiMAX technologies is already well established, independent, publicly released, thorough evaluations of WiMAX network performance in...

    Provided By VTT

  • White Papers // Jul 2009

    Theory and Practice of RRC State Transitions in UMTS Networks

    3GPP has been enhancing UMTS networks by issuing new standard releases recurrently. However, the RRC state transition model has remained rather unchanged through several releases, namely, Rel. 99, Rel. 05 and Rel. 06. The authors review RRC state transitions and study them in practice using their novel 3G Transition Triggering...

    Provided By VTT

  • White Papers // Jul 2009

    Pitfalls in Energy Consumption Evaluation Studies

    Energy consumption is fast emerging as a central item of research for the Future Internet (FI). In an environment where the majority of users access next generation networks using battery-powered devices, energy efficiency is of equal importance to other well-established metrics of overall system and protocol performance. Nevertheless, the authors...

    Provided By VTT

  • White Papers // Jun 2009

    IEEE 802.21: Media-Independent Handover Services

    Popular mobile devices now ship with several integrated wired and wireless network interfaces. Personal Digital Assistants (PDAs) and smartphones, for example, are increasingly supporting communications through both cellular technologies and Wireless LANs (WLANs); laptops typically come with built-in Ethernet, Wi-Fi, and Bluetooth. As multiaccess devices proliferate, the authors move closer...

    Provided By VTT

  • White Papers // May 2009

    Cross-Layer Architecture for Adaptive Real-Time Multimedia in Heterogeneous Network Environment

    Despite the interest, the utilization of today's networking environment including a variety of access technologies and various services and capabilities is still minimal. Multiaccess mobile devices already on the market provide a capability to hand over the heterogeneous networks but so far there has not been any commonly approved way...

    Provided By VTT

  • White Papers // Feb 2009

    Self-Management for a Network of Information

    Network management has been traditionally considered in the last stages of the design and development cycles of network technology. The typical modus operandi relies mostly on networkers that manually configure active elements, troubleshoot problems as they arise and reconfigure equipment accordingly. In fact, the authors note that several initiatives in...

    Provided By VTT

  • White Papers // Feb 2009

    Energy-Efficient Multiaccess Dissemination Networks

    Previous efforts to improve energy efficiency focused on different network architecture components, aiming in particular at increasing the operational time of battery-powered devices. This paper argues that patching elements of the current Internet architectural paradigm are not sufficient for achieving major savings in the overall network energy consumption. After reviewing...

    Provided By VTT

  • White Papers // Feb 2009

    Towards a GNU/Linux IEEE 802.21 Implementation

    Multiaccess mobile devices and overlapping wireless network deployments have emerged as a next generation network fixture. To make the most of all available networks, mobile devices should be capable of handing over between heterogeneous networks seamlessly and automatically. At the same time, operators should be able to steer network attachment...

    Provided By VTT

  • White Papers // Jan 2009

    Enhanced Media Independent Handover Framework

    The Internet access paradigm is changing and a wide range of overlapping radio access technologies, such as WiMAX, Wi-Fi, 3GPP UMTS/LTE and DVB-H, will soon be available to most users and their multi-access devices. Therefore, novel mechanisms and protocols are needed to provide seamless mobility between different wireless access technologies....

    Provided By VTT

  • White Papers // Jan 2009

    IPTV Over WiMAX With MIPv6 Handovers

    As the IPv4 unallocated address pool nears exhaustion, an increasing number of IPv6 deployments is anticipated. In the domain of mobility management research and development, Mobile IPv6 has long been favored over Mobile IPv4. Nevertheless, although in principle WiMAX supports IPv6 in various configurations and requires MIPv6 for network-level mobility...

    Provided By VTT

  • White Papers // Nov 2008

    Distributed Information Object Resolution

    The established host-centric networking paradigm is challenged due to handicaps related with disconnected operation, mobility, and broken locator/identifier semantics. This paper soberly examines another topic of great interest: distributed information object resolution. After recapping the notion of an information object, the authors review object resolution in today's Internet which is...

    Provided By VTT

  • White Papers // Nov 2008

    IP-Availability and SLA

    This paper studies possible Service Level Agreement (SLA) objectives corresponding network service availability in packet switched networks, focusing on IP networks. Service availability is looked from ISO-OSI reference model layers and cross-layer point of view. Both IETF and ITU-T metrics and definitions are discussed. The paper defines IP network service...

    Provided By VTT

  • White Papers // Feb 2013

    Secondary Terrestrial Use of Broadcasting Satellite Services Below 3 GHz

    Secondary use of the satellite spectrum by a terrestrial system is studied in this paper, focusing on broadcasting satellite services. Both spectrum sensing based access and database based access are discussed. Link budget analysis is used to define operational limits for spectrum sensing and transmission power control when the primary...

    Provided By VTT

  • White Papers // Nov 2008

    IP-Availability and SLA

    This paper studies possible Service Level Agreement (SLA) objectives corresponding network service availability in packet switched networks, focusing on IP networks. Service availability is looked from ISO-OSI reference model layers and cross-layer point of view. Both IETF and ITU-T metrics and definitions are discussed. The paper defines IP network service...

    Provided By VTT

  • White Papers // Oct 2009

    Using Model-Based Testing for Testing Application Models in the Context of Domain-Specific Modelling

    With the advancement in Domain-Specific Modelling (DSM), the productivity and quality in software development has also enhanced. Inspite of these gains, there is still a need to test these modeled applications prior to release. For testing these models traditional testing approaches can also be applied. Though with DSM, testing generated...

    Provided By VTT

  • White Papers // May 2010

    Data Integration, Pathway Analysis and Mining for Systems Biology

    Post-genomic molecular biology embodies high-throughput experimental techniques and hence is a data-rich field. The goal of this paper is to develop bioinformatics methods to utilize publicly available data in order to produce knowledge and to aid mining of newly generated data. As an example of knowledge or hypothesis generation, consider...

    Provided By VTT

  • White Papers // Dec 2010

    Optical Road Monitoring of the Future Smart Roads - Preliminary Results

    It has been shown that in most accidents the driver is responsible due to being distracted or misjudging the situation. In order to solve such problems research has been dedicated to developing driver assistance systems that are able to monitor the traffic situation around the vehicle. This paper presents methods...

    Provided By VTT

  • White Papers // Sep 2009

    Empirical Evaluation of Mobile WiMAX With MIMO

    Mobile WiMAX is claimed to have the greatest potential of all wireless access technologies already in the markets with respect to network capacity, range, mobility, and quality of service support. Mobile WiMAX has also adopted MIMO as an essential element for increasing capacity and data propagation reliability. However, there are...

    Provided By VTT

  • White Papers // Jan 2011

    Ambient Networks Gateway Selection Architecture

    Many anticipate a future wireless world filled by a multitude of user devices and wireless technologies. Effective management of this kind of heterogeneous, mobile, and rapidly changing ad hoc networks will be a challenging task. The authors present and evaluate the Ambient Networks Gateway Selection Architecture (GSA), which provides support...

    Provided By VTT

  • White Papers // Nov 2008

    Distributed Information Object Resolution

    The established host-centric networking paradigm is challenged due to handicaps related with disconnected operation, mobility, and broken locator/identifier semantics. This paper soberly examines another topic of great interest: distributed information object resolution. After recapping the notion of an information object, the authors review object resolution in today's Internet which is...

    Provided By VTT

  • White Papers // Jan 2009

    Enhanced Media Independent Handover Framework

    The Internet access paradigm is changing and a wide range of overlapping radio access technologies, such as WiMAX, Wi-Fi, 3GPP UMTS/LTE and DVB-H, will soon be available to most users and their multi-access devices. Therefore, novel mechanisms and protocols are needed to provide seamless mobility between different wireless access technologies....

    Provided By VTT

  • White Papers // Jan 2009

    IPTV Over WiMAX With MIPv6 Handovers

    As the IPv4 unallocated address pool nears exhaustion, an increasing number of IPv6 deployments is anticipated. In the domain of mobility management research and development, Mobile IPv6 has long been favored over Mobile IPv4. Nevertheless, although in principle WiMAX supports IPv6 in various configurations and requires MIPv6 for network-level mobility...

    Provided By VTT

  • White Papers // Jun 2009

    IEEE 802.21: Media-Independent Handover Services

    Popular mobile devices now ship with several integrated wired and wireless network interfaces. Personal Digital Assistants (PDAs) and smartphones, for example, are increasingly supporting communications through both cellular technologies and Wireless LANs (WLANs); laptops typically come with built-in Ethernet, Wi-Fi, and Bluetooth. As multiaccess devices proliferate, the authors move closer...

    Provided By VTT

  • White Papers // Feb 2009

    Self-Management for a Network of Information

    Network management has been traditionally considered in the last stages of the design and development cycles of network technology. The typical modus operandi relies mostly on networkers that manually configure active elements, troubleshoot problems as they arise and reconfigure equipment accordingly. In fact, the authors note that several initiatives in...

    Provided By VTT

  • White Papers // Feb 2009

    Energy-Efficient Multiaccess Dissemination Networks

    Previous efforts to improve energy efficiency focused on different network architecture components, aiming in particular at increasing the operational time of battery-powered devices. This paper argues that patching elements of the current Internet architectural paradigm are not sufficient for achieving major savings in the overall network energy consumption. After reviewing...

    Provided By VTT

  • White Papers // Jul 2009

    Pitfalls in Energy Consumption Evaluation Studies

    Energy consumption is fast emerging as a central item of research for the Future Internet (FI). In an environment where the majority of users access next generation networks using battery-powered devices, energy efficiency is of equal importance to other well-established metrics of overall system and protocol performance. Nevertheless, the authors...

    Provided By VTT

  • White Papers // Feb 2009

    Towards a GNU/Linux IEEE 802.21 Implementation

    Multiaccess mobile devices and overlapping wireless network deployments have emerged as a next generation network fixture. To make the most of all available networks, mobile devices should be capable of handing over between heterogeneous networks seamlessly and automatically. At the same time, operators should be able to steer network attachment...

    Provided By VTT

  • White Papers // Aug 2009

    On the Performance Gains of VoIP Aggregation and ROHC Over a WirelessMAN-OFDMA Air Interface

    A growing number of mobile WiMAX deployments are in progress worldwide and the technology is anticipated to play a key role in next generation mobile broadband wireless networks. However, although the theoretical potential of WiMAX technologies is already well established, independent, publicly released, thorough evaluations of WiMAX network performance in...

    Provided By VTT

  • White Papers // May 2009

    Cross-Layer Architecture for Adaptive Real-Time Multimedia in Heterogeneous Network Environment

    Despite the interest, the utilization of today's networking environment including a variety of access technologies and various services and capabilities is still minimal. Multiaccess mobile devices already on the market provide a capability to hand over the heterogeneous networks but so far there has not been any commonly approved way...

    Provided By VTT

  • White Papers // Jul 2010

    Dynamic Cross-Layer Adaptation of Scalable Video in Wireless Networking

    The recent trend in Internet traffic indicates the proliferation of usage of multimedia services where a substantial part is related to some sort of video transmission. Moreover, an increasing number of Internet users employ wireless access technologies. High-quality video streaming over wireless access in unison with great mobility brings challenges...

    Provided By VTT

  • White Papers // Jul 2009

    Theory and Practice of RRC State Transitions in UMTS Networks

    3GPP has been enhancing UMTS networks by issuing new standard releases recurrently. However, the RRC state transition model has remained rather unchanged through several releases, namely, Rel. 99, Rel. 05 and Rel. 06. The authors review RRC state transitions and study them in practice using their novel 3G Transition Triggering...

    Provided By VTT

  • White Papers // Feb 2012

    Using Built-In Domain-Specific Modeling Support to Guide Model-Based Test Generation

    The authors present a model-based testing approach to support automated test generation with domain-specific concepts. This includes a language expert who is an expert at building test models and domain experts who are experts in the domain of the system under-test. First, they provide a framework to support the language...

    Provided By VTT

  • White Papers // Aug 2010

    Towards a Taxonomy of Dynamic Invariants in Software Behaviour

    The use of dynamic invariants to describe software behaviour has gained increasing popularity and various tools and techniques for mining and using these invariants have been published. Typically, these invariants are used to support various software engineering tasks, such as testing and debugging which require one to understand and be...

    Provided By VTT