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This document specifies a simple signalling mechanism for inter-domain QoS marking using a BGP Extended Community QoS Attribute. Class based packet forwarding for delay and loss critical services is currently performed in an individual AS internal manner. The new QoS marking attribute makes the QoS class setup within the IP prefix advertising AS known to all access and transit ASes. This enables individual (re-)marking and forwarding treatment adaptation to the original QoS class setup of the respective IP prefix. The attribute provides the means to signal QoS markings on different layers, which are linked together in QoS class sets. It provides inter-domain and cross-layer insight into the QoS class mapping of the source AS with minimal signalling traffic.

Problemområde: Idag har Internet blivit var mans egendom. Detta innebär tyvärr en hel del problem. Det tydligaste vi står inför idag är att IP-adresserna håller på att ta slut. För att bli av med problemet används olika temporära lösningar ("lappningsteknik") men även en permanent lösning utvecklas, nämligen Ipv6 (Internet Protocol version 6).Det nya protokollet löser adressbristen men har även många andra funktioner så som säkerhet och bättre routinglösningar. Vi ställde oss då frågan varför har ingen övergång skett trots dessa fördelar. Frågeställning: Var i övergången mellan IPv4 och IPv6 står vi idag? Varför har inte övergången mellan IPv4 och IPv6 redan skett? Vilka är de största anledningarna och vilka fler möjliga finns det? Slutsats: Arbetet visar att tiden för en övergång ännu inte är inne. Huvudanledningarna är att det saknas produkter och en allmän anledning för en migration.

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Made available in DSpace on 2016-04-04T18:31:19Z (GMT). No. of bitstreams: 1 Alexandre David Medeiros-1.pdf: 2241104 bytes, checksum: 2474b0cdd4a080e937967b0552c2b175 (MD5) Previous issue date: 2007-06-23 / The telecommunications services quality, as well as several other products in the telecommunications area, is strongly linked to the suppliers services levels quality. These services levels can, however, be measured andevaluated by objective criteria and from a service level agreement between service supplier and customer, this agreement is called SLA. In this study a methodology is proposed for the elaboration of the SLA documentation model, that takes care the business model necessity.This methodology is structuralized in the politics and processes of service quality described by the international norms and standards like Management Forum, ITU, IETF and ITIL. The modeling of the SLA documentation was applied in a practical case of multi-service networks, based in IP networks, resulting in the system specification of the quality service level to be contracted with services supplier. The application of this methodology resulted in improvements for both sides, regarding the reduction in operational costs, the correction of processes and procedures, and a high reliability and transparency in the commercial relation. / A qualidade dos servi?os de telecomunica??es, assim como a de v?rios outros produtos da ?rea de telecomunica??es, est? fortemente ligada aos n?veis de qualidade de servi?os prestados pelos fornecedores. Esses n?veis de servi?os podem, no entanto, ser medidos e avaliados por meio de fatores e crit?rios objetivos, a partir de um N?vel de Servi?o acordado entre o provedor do servi?o e o cliente, chamado de SLA. Neste estudo ? proposta uma metodologia para elabora??o de modelo de documenta??o SLA. Essa metodologia est? estruturada na pol?tica e nos processos de qualidade de servi?o descritos nas normas e padr?es internacionais do TeleManagement Forum, ITU ,IETF e ITIL. A modelagem da documenta??o SLA foi aplicada em um caso pr?tico de rede de multiservi?os, baseada em redes IP, resultando na especifica??o do sistema de n?vel de qualidade de servi?o a ser contratado do provedor de servi?os. Na aplica??o dessa metodologia obteve-se ganhos para ambos os lados, com refer?ncia a redu??o de custo operacional, na corre??o de processos e procedimentos e uma alta confiabilidade e transpar?ncia na rela??o comercial.

L’objectif de cette thèse est de développer un réseau IPv6 constitué de capteurs sans fils autonomes grâce à la récupération d’énergie, fonctionnant à faible rapport cyclique. Cette thèse s’inscrit dans un projet industriel, GreenNet, lancé par STMicroelectronics afin de se positionner sur le marché de l’Internet des Objets. La nouvelle plate-forme utilisée dans ce projet se différencie de ses concurrents par sa petite taille, ce qui implique une faible capacité de batterie. Une cellule photovoltaı̈que permet en revanche de recharger la batterie, y compris dans des conditions de luminosité faible. Pour atteindre l’autonomie, nous avons besoin que les nœuds dorment pour de très longues périodes. Par conséquent, les solutions existantes, bien que peu consommantes, ne sont pas complètement adaptées à nos besoins spécifiques.Dans cette thèse, nous proposons d’analyser les difficultés possiblement rencontrées pendant le développement d’une plate-forme à récupération d’énergie et de bas rapport cyclique. La contribution la plus importante de ce travail est de mettre en œuvre et d’évaluer le rendement de nos solutions sur des plates-formes matérielles dans des conditions très proches de la vie réelle.Une première étape du travail réalisée est la conception et l’implémentation de la norme IEEE 802.15.4 utilisant les balises pour maintenir la synchronisation. Nous choisissons le mode synchronisé car il permet aux nœuds d’atteindre des rapports cycliques aussi bas que 0,01%. La seconde étape est d’apporter le multi saut : nous proposons une optimisation du protocole de routage, ainsi qu’un contrôle d’accès par multiplexagetemporel pour les routeurs et les dispositifs afin d’éliminer les interférences.Nous allons même plus loin dans l’optimisation du temps où les nœuds sont allumés: nous proposons d’éteindre les coordinateurs avant la fin de leur période d’activité définie par le standard, lorsqu’il n’y a pas de communications. Les nœuds qui ne nécessitent pas d’envoyer des données peuvent sauter des balises et se réveiller seulement lorsqu’il est nécessaire de synchroniser les horloges, ou d’envoyer des données. Dans le même temps, nous résolvons le problème de multicast pour les nœuds qui dorment durant de longues périodes, en convertissant ces paquets en paquets unicast. Nous améliorons également le rapport cyclique de routeurs qui n’ont pas de nœuds associés en les forçant envoyer la balise moins souvent, tant qu’ils n’ont pas des nœuds associés.Pour améliorer la performance du réseau, nous proposons aussi une solution rétro compatible qui utilise plusieurs canaux. Un tel système est utile quand un lien entre deux nœuds subit de très mauvaise performance sur un certain canal fréquentiel, mais obtient de meilleurs résultats sur une fréquence différente.Toutes les solutions présentées ci-dessus, et discutées dans la dissertation ont été mises en œuvre et testées sur la plate-forme GreenNet. Nous avons également réalisé des mesures sur des nœuds pour vérifier leurs efficacité. / The goal of the thesis is to enable IPv6 harvested and autonomous wireless sensor networks with very low duty-cycle. It is part of an industrial project, GreenNet, hosted by STMicroelectronics with the goal of being a pioneer in the Internet of Things. The new platform differentiates from its existing competitors by a small size, which implies small battery capacity. However, a photovoltaic cell is capable of recharging the battery even under low light conditions. On top of this, we aim at nodes that sleep for very long periods. Hence, the existing solutions were not completely suited for ourneeds.The thesis proposes to analyze the possible challenges that one can meet while developing a harvested low-duty cycle platform. The most important contribution of this work is that we implement and evaluate the performance of our solutions on real hardware platforms in conditions very close to real-life.In this dissertation, we first of all develop and implement a basic solution based on the IEEE 802.15.4 beacon-enabled standard. We choose the synchronized mode because it allows nodes to reach duty-cycles as low as 0.01%. A more difficult step was to bring multi-hop: we design new a routing scheme inside our network, and a time based access for routers and devices to eliminate interferences as much as possible. The routing scheme is meant to be simple and efficient.We go even further to optimize the total time the nodes are on: we proposed to shut down coordinators before their standardized end of slot when there is no communication. Devices that do not need to send data can skip beacons and only need to wake up to synchronize their clock or to send data. In the same time we solve the problem of multicast for long sleeping nodes by converting these packets into unicast traffic. We also improved the duty-cycle of routers that do no have associated devices by forcing them to beacon slower, as long as they do not have any associated devices.To improve the network performance we also propose a backward compatible multichannel solution. Such a scheme is useful when a link between two nodes achieve very bad performance on a certain channel but better results on a different frequency.All the solutions presented above and discussed in the dissertation were implemented and tested on the GreenNet platform. We also realized measurements of the nodes efficiency while in harvested conditions and showed that it is possible to handle harvested routers, when there is enough available light.

This thesis deals with the measurement of transmission parameters in the new generation access networks NGA. The aim of the thesis is to build and configure a test network and scenarios for the measurement of service quality parameters and then verify the transmission stability. The theoretical part describes general functioning of NGN networks, the requirements of different telecommunications services on quality parameters, methodology and recommendations for measuring transmission parameters in packet networks. The practical part deals with the configuration of scenarios using mainly MPLS technology and methodology of their testing. Measurements were performed according to recommendations IETF RFC 2544, IETF RFC 6349 with the ExacTCP test and ITU-T Y.1564 with the EtherSAM test. For measurements were used measuring instruments of EXFO brand. In conclusion, the measurement results according to the mentioned standards were evaluated and also the advantages of using the measurement according to the given standard in NGA access networks were discussed.

This document specifies a simple signalling mechanism for inter-domain QoS marking using a BGP Extended Community QoS Attribute. Class based packet forwarding for delay and loss critical services is currently performed in an individual AS internal manner. The new QoS marking attribute makes the QoS class setup within the IP prefix advertising AS known to all access and transit ASes. This enables individual (re-)marking and forwarding treatment adaptation to the original QoS class setup of the respective IP prefix. The attribute provides the means to signal QoS markings on different layers, which are linked together in QoS class sets. It provides inter-domain and cross-layer insight into the QoS class mapping of the source AS with minimal signalling traffic.

Simple Network Management Protocol (SNMP) has been the traditional approach for configuring and monitoring network devices, but its limitations in security and automation have driven the exploration of alternative solutions. The Network Configuration Protocol (NETCONF) and Yet Another Next Generation (YANG) data modeling language significantly improve security and automation capabilities. This thesis aims to investigate the feasibility of implementing a NETCONF server on the Anybus CompactCom (ABCC) Industrial Internet of Things (IIoT) Security module, an embedded device with limited processing power and memory, running on a custom operating system, and using open source projects with MbedTLS as the cryptographic primitive library. The project will assess implementing a YANG model to describe the ABCC’s configurable interface, connecting with a NETCONF client to exchange capabilities, monitoring specific attributes or interfaces on the device, and invoking remote procedure call (RPC) commands to configure the ABCC settings. The goal is to provide a proof of concept and contribute to the growing trend of adopting NETCONF and YANG in the industry, particularly for the Industrial Internet of Things (IIoT) platform of Hardware Meets Software (HMS).

Über 30 Jahre existierte in Meißen in der DDR eine Forschungseinrichtung für den landwirtschaftlichen Transport. Im Laufe der Zeit wurde das Forschungs- und Entwicklungsgebiet um Umschlag und Lagerung und schließlich um die Energieanwendung in der Landwirtschaft erweitert. Die Forschungen in Meißen zeichneten sich durch die weitestgehend einheitliche Betrachtung von Ökonomie, Technologie, Technik, Betriebs- und Volkswirtschaft aus. Dabei wurde Wert darauf gelegt, die Ergebnisse mit Partnern aus der Praxis und anderen Verfahrensinstituten ständig zu diskutieren und deren Wünsche zu berücksichtigen. Das heißt auch, dass die Forschung sehr praxisnah ausgelegt war. Schwerpunkte waren sowohl neue technische Entwicklungen für den TUL-Prozess in Pflanzen- und Tierproduktion als auch Umsetzungsaktivitäten für Geräte in den Rationalisierungsmittelbau. Die Überleitung der Ergebnisse war in den letzten Jahren jedoch nicht befriedigend. Die Darstellungen zu Meißen werden durch Beiträge zu den Betriebsteilen des FZM, zur Außenstelle Dresden und zu den vorgesetzten Stellen ergänzt.