23 research outputs found

    Foutbestendige toekomstige internetarchitecturen

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    Building the Future Internet through FIRE

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    The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate

    On the resource abstraction, partitioning and composition for virtual GMPLS-controlled multi-layer optical networks

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    Virtual optical networking supports the dynamic provisioning of dedicated networks over the same network infrastructure, which has received a lot of attention by network providers. The stringent network requirements (e.g., Quality of Service -QoS-, Service Level Agreement -SLA-, dynamicity) of the emerging high bandwidth and dynamic applications such as high-definition video streaming (e.g., telepresence, television, remote surgery, etc.), and cloud computing (e.g., real-time data backup, remote desktop, etc.) can be supported by the deployment of dynamic infrastructure services to build ad-hoc Virtual Optical Networks (VON), which is known as Infrastructure as a Service (IaaS). Future Internet should support two separate entities: infrastructure providers (who manage the physical infrastructure) and service providers (who deploy network protocols and offer end-to-end services). Thus, network service providers shall request, on a per-need basis, a dedicated and application-specific VON and have full control over it. Optical network virtualization technologies allow the partitioning/composition of the network infrastructure (i.e., physical optical nodes and links) into independent virtual resources, adopting the same functionality as the physical resource. The composition of these virtual resources (i.e., virtual optical nodes and links) allows the deployment of multiple VONs. A VON must be composed of not only a virtual transport plane but also of a virtual control plane, with the purpose of providing the required independent and full control functionalities (i.e., automated connection provisioning and recovery (protection/restauration), traffic engineering (e.g., QoS, SLA), etc.). This PhD Thesis focuses on optical network virtualization, with three main objectives. The first objective consists on the design, implementation and evaluation of an architecture and the necessary protocols and interfaces for the virtualization of a Generalized Multi-Protocol Label Switching (GMPLS) controlled Wavelength Switched Optical Network (WSON) and the introduction of a resource broker for dynamic virtual GMPLS-controlled WSON infrastructure services, whose task is to dynamically deploy VONs from service provider requests. The introduction of a resource broker implies the need for virtual resource management and allocation algorithms for optimal usage of the shared physical infrastructure. Also, the deployment of independent virtual GMPLS control plane on top of each VON shall be performed by the resource broker. This objective also includes the introduction of optical network virtualization for Elastic Optical Networks (EON). The second objective is to design, implement and experimentally evaluate a system architecture for deploying virtual GMPLS-controlled Multi-Protocol Label Switching Transport Profile (MPLS-TP) networks over a shared WSON. With this purpose, this PhD Thesis also focuses on the design and development of MPLS-TP nodes which are deployed on the WSON of the ADRENALINE Testbed at CTTC premises. Finally, the third objective is the composition of multiple virtual optical networks with heterogeneous control domains (e.g., GMPLS, OpenFlow). A multi-domain resource broker has been designed, implemented and evaluated.La gesti贸 de xarxes 貌ptiques virtuals permet la provisi贸 din脿mica de xarxes dedicades a sobre la mateixa infraestructura de xarxa i ha cridat molt l鈥檃tenci贸 als prove茂dors de xarxes. Els requisits de xarxa (per exemple la qualitat de servei, els acords de nivell de servei o la dinamicitat) s贸n cada cop m茅s astringents per a les aplicacions emergents d'elevat ample de banda i din脿miques, que inclouen per exemple la reproducci贸 en temps real de v铆deo d'alta definici贸 (telepres猫ncia, televisi贸, telemedicina) i serveis d鈥檌nform脿tica en n煤vol (c貌pies de seguretat en temps real, escriptori remot). Aquests requisits poden ser assolits a trav茅s del desplegament de serveis de infraestructura din脿mics per construir xarxes 貌ptiques virtuals (VON, en angl猫s), fet que 茅s conegut com a infraestructura com a servei (IaaS). La internet del futur hauria de suportar dos entitats diferenciades: els prove茂dors d'infraestructures (responsables de gestionar la infraestructura f铆sica), i els prove茂dors de serveis (responsables dels protocols de xarxa i d'oferir els serveis finals). D'aquesta forma els prove茂dors de serveis podrien sol鈥icitar i gestionar en funci贸 de les necessitats xarxes 貌ptiques virtuals dedicades i espec铆fiques per les aplicacions. Les tecnologies de virtualitzaci贸 de xarxes 貌ptiques virtuals permeten la partici贸 i composici贸 de infraestructura de xarxa (nodes i enlla莽os 貌ptics) en recursos virtuals independents que adopten les mateixes funcionalitats que els recursos f铆sics. La composici贸 d'aquests recursos virtuals (nodes i enlla莽os 貌ptics virtuals) permet el desplegament de m煤ltiples VONs. Una VON no sols est脿 composada per un pla de transport virtual, sin贸 tamb茅 per un pla de control virtual, amb l'objectiu d'incorporar les funcionalitats necess脿ries a la VON (provisi贸 de connexions autom脿tiques i recuperaci贸 (protecci贸/restauraci贸), enginyeria de tr脿fic, etc.). Aquesta tesis es centra en la virtualitzaci贸 de xarxes 貌ptiques amb tres objectius principals. El primer objectiu consisteix en el disseny, implementaci贸 i avaluaci贸 de l'arquitectura i els protocols i interf铆cies necessaris per la virtualitzaci贸 de xarxes encaminades a trav茅s de la longitud d'ona i controlades per GMPLS. Tamb茅 inclou la introducci贸 d'un gestor de recursos per desplegar xarxes 貌ptiques virtuals de forma din脿mica. La introducci贸 d'aquest gestor de recursos implica la necessitat d'una gesti贸 dels recursos virtuals i d鈥檃lgoritmes d鈥檃ssignaci贸 de recursos per a la utilitzaci贸 貌ptima dels recursos f铆sics. A m茅s el gestor de recursos ha de ser capa莽 del desplegament dels recursos assignats, incloent un pla de control GMPLS virtual independent per a cada VON desplegada. Finalment, aquest objectiu inclou la introducci贸 de mecanismes de virtualitzaci贸 per a xarxes el脿stiques 貌ptiques (EON, en angl猫s). El segon objectiu 茅s el disseny, la implementaci贸 i l鈥檃valuaci贸 experimental d'una arquitectura de sistema per oferir xarxes MPLS-TP virtuals controlades per GMPLS sobre una infraestructura i WSON compartida. Per aix貌, aquesta tesis tamb茅 es centra en el disseny i desenvolupament d'un node MPLS-TP que ha estat desplegat al demostrador ADRENALINE, al CTTC. Finalment, el tercer objectiu 茅s la composici贸 de m煤ltiples xarxes 貌ptiques virtuals en dominis de control heterogenis (GMPLS i OpenFlow). Un gestor de recursos multi-domini ha estat dissenyat, implementat i avaluat.La gesti贸n de redes 贸pticas virtuales permite la provisi贸n din谩mica de redes dedicadas encima la misma infraestructura de red y ha llamado mucho la atenci贸n a los proveedores de redes. Los requisitos de red (por ejemplo la calidad de servicio, los acuerdos de nivel de servicio o la dinamicidad) son cada vez m谩s estringentes para las aplicaciones emergentes de elevado ancho de banda y din谩micas, que incluyen por ejemplo la reproducci贸n en tiempo real de v铆deo de alta definici贸n (telepresencia, televisi贸n, telemedicina) y servicios de computaci贸n en la nube (copias de seguridad en tiempo real, escritorio remoto). Estos requisitos pueden ser logrados a trav茅s del despliegue de servicios de infraestructura din谩micos para construir redes 贸pticas virtuales (VON, en ingl茅s), hecho que es conocido como infraestructura como servicio (IaaS). La internet del futuro tendr谩 que soportar dos entidades diferenciadas: los proveedores de infraestructuras (responsables de gestionar la infraestructura f铆sica), y los proveedores de servicios (responsables de los protocolos de red y de ofrecer los servicios finales). De esta forma los proveedores de servicios podr谩n solicitar y gestionar en funci贸n de las necesitados redes 贸pticas virtuales dedicadas y espec铆ficas por las aplicaciones. Las tecnolog铆as de virtualizaci贸n de redes 贸pticas virtuales permiten la partici贸n y composici贸n de infraestructura de red (nodos y enlaces 贸pticos) en recursos virtuales independientes que adoptan las mismas funcionalidades que los recursos f铆sicos. La composici贸n de estos recursos virtuales (nodos y enlaces 贸pticos virtuales) permite el despliegue de m煤ltiples VONs. Una VON no s贸lo est谩 compuesta por un plan de transporte virtual, sino tambi茅n por un plan de control virtual, con el objetivo de incorporar las funcionalidades necesarias a la VON (provisi贸n de conexiones autom谩ticas y recuperaci贸n (protecci贸n/restauraci贸n), ingenier铆a de tr谩fico, etc.). Esta tesis se centra en la virtualizaci贸n de redes 贸pticas con tres objetivos principales. El primer objetivo consiste en el dise帽o, implementaci贸n y evaluaci贸n de la arquitectura y los protocolos e interfaces necesarios por la virtualizaci贸n de redes encaminadas a trav茅s de la longitud de ola y controladas por GMPLS. Tambi茅n incluye la introducci贸n de un gestor de recursos para desplegar redes 贸pticas virtuales de forma din谩mica. La introducci贸n de este gestor de recursos implica la necesidad de una gesti贸n de los recursos virtuales y de algoritmos de asignaci贸n de recursos para la utilizaci贸n 贸ptima de los recursos f铆sicos. Adem谩s el gestor de recursos tiene que ser capaz del despliegue de los recursos asignados, incluyendo un plan de control GMPLS virtual independiente para cada VON desplegada. Finalmente, este objetivo incluye la introducci贸n de mecanismos de virtualizaci贸n para redes el谩sticas 贸pticas (EON, en ingl茅s). El segundo objetivo es el dise帽o, la implementaci贸n y la evaluaci贸n experimental de una arquitectura de sistema para ofrecer redes MPLS-TP virtuales controladas por GMPLS sobre una infraestructura WSON compartida. Por eso, esta tesis tambi茅n se centra en el dise帽o y desarrollo de un nodo MPLS-TP que ha sido desplegado al demostrador ADRENALINE, en el CTTC. Finalmente, el tercer objetivo es la composici贸n de m煤ltiples redes 贸pticas virtuales en dominios de control heterog茅neos (GMPLS y OpenFlow). Un gestor de recursos multi-dominio ha sido dise帽ado, implementado y evaluado

    Building the Future Internet through FIRE

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    The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate

    Survivability aspects of future optical backbone networks

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    In huidige glasvezelnetwerken kan een enkele vezel een gigantische hoeveelheid data dragen, ruwweg het equivalent van 25 miljoen gelijktijdige telefoongesprekken. Hierdoor zullen netwerkstoringen, zoals breuken van een glasvezelkabel, de communicatie van een groot aantal eindgebruikers verstoren. Netwerkoperatoren kiezen er dan ook voor om hun netwerk zo te bouwen dat zulke grote storingen automatisch opgevangen worden. Dit proefschrift spitst zich toe op twee aspecten rond de overleefbaarheid in toekomstige optische netwerken. De eerste doelstelling die beoogd wordt is het tot stand brengen vanrobuuste dataverbindingen over meerdere netwerken. Door voldoende betrouwbare verbindingen tot stand te brengen over een infrastructuur die niet door een enkele entiteit wordt beheerd kan men bv. weredwijd Internettelevisie van hoge kwaliteit aanbieden. De bestudeerde oplossing heeft niet enkel tot doel om deze zeer betrouwbare verbinding te berekenen, maar ook om dit te bewerkstelligen met een minimum aan gebruikte netwerkcapaciteit. De tweede doelstelling was om een antwoord te formuleren om de vraag hoe het toepassen van optische schakelsystemen gebaseerd op herconfigureerbare optische multiplexers een impact heeft op de overleefbaarheid van een optisch netwerk. Bij lagere volumes hebben optisch geschakelde netwerken weinig voordeel van dergelijke gesofistikeerde methoden. Elektronisch geschakelde netwerken vertonen geen afhankelijkheid van het datavolume en hebben altijd baat bij optimalisatie

    A suite of optical network testbeds for a realistic evaluation of MAINS' sub-wavelength switched metro network architectures

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    This paper discusses the requirements and motivations for setting-up and utilizing two different optical fiber test-beds both of a Telecom Operator as well as the UEssex/JANET Aurora field fiber testbed for optical metro networks research within the EU ICT MAINS project. Using both test-beds the MAINS project aims to evaluate its proposed mesh-ring topologies which feature innovative sub-wavelength switching nodes. Different research and technology attributes are considered for evaluation over the research and real commercial environments. The paper illustrates how the first test-bed scenario is designed to experimentally analyze multi-technology interoperability both at the data and control planes and how the second test-bed scenario with the use of a virtual PC application over sub-wavelength switching ring network aims to validate the proposed solutions with real customers and obtain supportive statistics and performance measures

    Recent Advances in Wireless Communications and Networks

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    This book focuses on the current hottest issues from the lowest layers to the upper layers of wireless communication networks and provides "real-time" research progress on these issues. The authors have made every effort to systematically organize the information on these topics to make it easily accessible to readers of any level. This book also maintains the balance between current research results and their theoretical support. In this book, a variety of novel techniques in wireless communications and networks are investigated. The authors attempt to present these topics in detail. Insightful and reader-friendly descriptions are presented to nourish readers of any level, from practicing and knowledgeable communication engineers to beginning or professional researchers. All interested readers can easily find noteworthy materials in much greater detail than in previous publications and in the references cited in these chapters

    Resilient and Scalable Forwarding for Software-Defined Networks with P4-Programmable Switches

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    Traditional networking devices support only fixed features and limited configurability. Network softwarization leverages programmable software and hardware platforms to remove those limitations. In this context the concept of programmable data planes allows directly to program the packet processing pipeline of networking devices and create custom control plane algorithms. This flexibility enables the design of novel networking mechanisms where the status quo struggles to meet high demands of next-generation networks like 5G, Internet of Things, cloud computing, and industry 4.0. P4 is the most popular technology to implement programmable data planes. However, programmable data planes, and in particular, the P4 technology, emerged only recently. Thus, P4 support for some well-established networking concepts is still lacking and several issues remain unsolved due to the different characteristics of programmable data planes in comparison to traditional networking. The research of this thesis focuses on two open issues of programmable data planes. First, it develops resilient and efficient forwarding mechanisms for the P4 data plane as there are no satisfying state of the art best practices yet. Second, it enables BIER in high-performance P4 data planes. BIER is a novel, scalable, and efficient transport mechanism for IP multicast traffic which has only very limited support of high-performance forwarding platforms yet. The main results of this thesis are published as 8 peer-reviewed and one post-publication peer-reviewed publication. The results cover the development of suitable resilience mechanisms for P4 data planes, the development and implementation of resilient BIER forwarding in P4, and the extensive evaluations of all developed and implemented mechanisms. Furthermore, the results contain a comprehensive P4 literature study. Two more peer-reviewed papers contain additional content that is not directly related to the main results. They implement congestion avoidance mechanisms in P4 and develop a scheduling concept to find cost-optimized load schedules based on day-ahead forecasts
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