2 research outputs found

    Demonstration of latency-aware 5G network slicing on optical metro networks

    Get PDF
    The H2020 METRO-HAUL European project has architected a latency-aware, cost-effective, agile, and programmable optical metro network. This includes the design of semi-disaggregated metro nodes with compute and storage capabilities, which interface effectively with both 5G access and multi-Tbit/s elastic optical networks in the core. In this paper, we report the automated deployment of 5G services, in particular, a public safety video surveillance use case employing low-latency object detection and tracking using on-camera and on-the-edge analytics. The demonstration features flexible deployment of network slice instances, implemented in terms of ETSI NFV Network Services. We summarize the key findings in a detailed analysis of end-to-end quality of service, service setup time, and soft-failure detection time. The results show that the round-trip-time over an 80 km link is under 800 碌s and the service deployment time under 180 seconds.Horizon 2020 Framework Programme (761727); Bundesministerium f眉r Bildung und Forschung (16KIS0979K).Peer ReviewedArticle signat per 25 autors/es: B. Shariati, Fraunhofer HHI, Berlin, Germany / L. Velasco, Universitat Polit猫cnica de Catalunya, Barcelona, Spain / J.-J. Pedreno-Manresa, ADVA, Munich, Germany / A. Dochhan, ADVA, Munich, Germany / R. Casellas, Centre Tecnol貌gic Telecomunicacions Catalunya, Castelldefels, Spain / A. Muqaddas, University of Bristol, Bristol, UK / O. Gonzalez de Dios, Telef贸nica, Madrid, Spain / L. Luque Canto, Telef贸nica, Madrid, Spain / B. Lent, Qognify GmbH, Bruchsal, Germany / J. E. Lopez de Vergara, Naudit HPCN, Madrid, Spain / S. Lopez-Buedo, Naudit HPCN, Madrid, Spain / F. Moreno, Universidad Polit茅cnica de Cartagena, Cartagena, Spain / P. Pavon, Universidad Polit茅cnica de Cartagena, Cartagena, Spain / M. Ruiz, Universitat Polit猫cnica de Catalunya, Barcelona, Spain / S. K. Patri, ADVA, Munich, Germany / A. Giorgetti, CNIT, Pisa, Italy / F. Cugini, CNIT, Pisa, Italy / A. Sgambelluri, CNIT, Pisa, Italy / R. Nejabati, University of Bristol, Bristol, UK / D. Simeonidou, University of Bristol, Bristol, UK / R.-P. Braun, Deutsche Telekom, Germany / A. Autenrieth, ADVA, Munich, Germany / J.-P. Elbers, ADVA, Munich, Germany / J. K. Fischer, Fraunhofer HHI, Berlin, Germany / R. Freund, Fraunhofer HHI, Berlin, GermanyPostprint (author's final draft

    Distributed collaborative knowledge management for optical network

    Get PDF
    Network automation has been long time envisioned. In fact, the Telecommunications Management Network (TMN), defined by the International Telecommunication Union (ITU), is a hierarchy of management layers (network element, network, service, and business management), where high-level operational goals propagate from upper to lower layers. The network management architecture has evolved with the development of the Software Defined Networking (SDN) concept that brings programmability to simplify configuration (it breaks down high-level service abstraction into lower-level device abstractions), orchestrates operation, and automatically reacts to changes or events. Besides, the development and deployment of solutions based on Artificial Intelligence (AI) and Machine Learning (ML) for making decisions (control loop) based on the collected monitoring data enables network automation, which targets at reducing operational costs. AI/ML approaches usually require large datasets for training purposes, which are difficult to obtain. The lack of data can be compensated with a collective self-learning approach. In this thesis, we go beyond the aforementioned traditional control loop to achieve an efficient knowledge management (KM) process that enhances network intelligence while bringing down complexity. In this PhD thesis, we propose a general architecture to support KM process based on four main pillars, which enable creating, sharing, assimilating and using knowledge. Next, two alternative strategies based on model inaccuracies and combining model are proposed. To highlight the capacity of KM to adapt to different applications, two use cases are considered to implement KM in a purely centralized and distributed optical network architecture. Along with them, various policies are considered for evaluating KM in data- and model- based strategies. The results target to minimize the amount of data that need to be shared and reduce the convergence error. We apply KM to multilayer networks and propose the PILOT methodology for modeling connectivity services in a sandbox domain. PILOT uses active probes deployed in Central Offices (COs) to obtain real measurements that are used to tune a simulation scenario reproducing the real deployment with high accuracy. A simulator is eventually used to generate large amounts of realistic synthetic data for ML training and validation. We apply KM process also to a more complex network system that consists of several domains, where intra-domain controllers assist a broker plane in estimating accurate inter-domain delay. In addition, the broker identifies and corrects intra-domain model inaccuracies, as well as it computes an accurate compound model. Such models can be used for quality of service (QoS) and accurate end-to-end delay estimations. Finally, we investigate the application on KM in the context of Intent-based Networking (IBN). Knowledge in terms of traffic model and/or traffic perturbation is transferred among agents in a hierarchical architecture. This architecture can support autonomous network operation, like capacity management.La automatizaci贸n de la red se ha concebido desde hace mucho tiempo. De hecho, la red de gesti贸n de telecomunicaciones (TMN), definida por la Uni贸n Internacional de Telecomunicaciones (ITU), es una jerarqu铆a de capas de gesti贸n (elemento de red, red, servicio y gesti贸n de negocio), donde los objetivos operativos de alto nivel se propagan desde las capas superiores a las inferiores. La arquitectura de gesti贸n de red ha evolucionado con el desarrollo del concepto de redes definidas por software (SDN) que brinda capacidad de programaci贸n para simplificar la configuraci贸n (descompone la abstracci贸n de servicios de alto nivel en abstracciones de dispositivos de nivel inferior), organiza la operaci贸n y reacciona autom谩ticamente a los cambios o eventos. Adem谩s, el desarrollo y despliegue de soluciones basadas en inteligencia artificial (IA) y aprendizaje autom谩tico (ML) para la toma de decisiones (bucle de control) en base a los datos de monitorizaci贸n recopilados permite la automatizaci贸n de la red, que tiene como objetivo reducir costes operativos. AI/ML generalmente requieren un gran conjunto de datos para entrenamiento, los cuales son dif铆ciles de obtener. La falta de datos se puede compensar con un enfoque de autoaprendizaje colectivo. En esta tesis, vamos m谩s all谩 del bucle de control tradicional antes mencionado para lograr un proceso eficiente de gesti贸n del conocimiento (KM) que mejora la inteligencia de la red al tiempo que reduce la complejidad. En esta tesis doctoral, proponemos una arquitectura general para apoyar el proceso de KM basada en cuatro pilares principales que permiten crear, compartir, asimilar y utilizar el conocimiento. A continuaci贸n, se proponen dos estrategias alternativas basadas en inexactitudes del modelo y modelo de combinaci贸n. Para resaltar la capacidad de KM para adaptarse a diferentes aplicaciones, se consideran dos casos de uso para implementar KM en una arquitectura de red 贸ptica puramente centralizada y distribuida. Junto a ellos, se consideran diversas pol铆ticas para evaluar KM en estrategias basadas en datos y modelos. Los resultados apuntan a minimizar la cantidad de datos que deben compartirse y reducir el error de convergencia. Aplicamos KM a redes multicapa y proponemos la metodolog铆a PILOT para modelar servicios de conectividad en un entorno aislado. PILOT utiliza sondas activas desplegadas en centrales de telecomunicaci贸n (CO) para obtener medidas reales que se utilizan para ajustar un escenario de simulaci贸n que reproducen un despliegue real con alta precisi贸n. Un simulador se utiliza finalmente para generar grandes cantidades de datos sint茅ticos realistas para el entrenamiento y la validaci贸n de ML. Aplicamos el proceso de KM tambi茅n a un sistema de red m谩s complejo que consta de varios dominios, donde los controladores intra-dominio ayudan a un plano de br贸ker a estimar el retardo entre dominios de forma precisa. Adem谩s, el br贸ker identifica y corrige las inexactitudes de los modelos intra-dominio, as铆 como tambi茅n calcula un modelo compuesto preciso. Estos modelos se pueden utilizar para estimar la calidad de servicio (QoS) y el retardo extremo a extremo de forma precisa. Finalmente, investigamos la aplicaci贸n en KM en el contexto de red basada en intenci贸n (IBN). El conocimiento en t茅rminos de modelo de tr谩fico y/o perturbaci贸n del tr谩fico se transfiere entre agentes en una arquitectura jer谩rquica. Esta arquitectura puede soportar el funcionamiento aut贸nomo de la red, como la gesti贸n de la capacidad.Postprint (published version
    corecore