La technologie et les conducteurs socio-économiques créent les conditions d'une transformation profonde, appelée "Softwarization", du Telco et des TIC. Réseaux définis par logiciel et réseau Fonctions de virtualisation sont deux des principales technologies permettant ouvrant la voie à cette transformation. Softwarization permettra de virtualiser toutes les fonctions de réseau et de services d'une infrastructure de Telco et de les exécuter sur une plates-formes logicielles, entièrement découplés de l'infrastructure physique sous (presque basé sur du matériel standard). Tous les services seront fournis en utilisant un «continuum» des ressources virtuelles (traitement, de stockage et de communication) avec un investissement en capital initial pratiquement très limité et avec des coûts d'exploitation modestes. 5G sera la première exploitation de Softwarization. 5G sera une infrastructure distribuée massivement dense, intégrant le traitement, le stockage et (fixes et radio) des capacités de mise en réseau. En résumé, l'objectif général de cette thèse a étudié les défis techniques et les opportunités d'affaires apportées par le "Softwarization" et 5G. En particulier, la thèse propose que le 5G devra avoir une sorte de système d'exploitation (5GOS) capable de fonctionner les RAN et de base et les infrastructures fixes convergés. Les contributions de cette thèse ont été: 1) définir une vision pour les futures infrastructures 5G, des scénarios, des cas d'utilisation et les exigences principales: 2) définissant l'architecture fonctionnelle d'un système d'exploitation pour 5G; 3) la conception de l'architecture logicielle d'un 5GOS pour le "bord Cloud"; 4) comprendre les impacts technico-économiques de la vision et 5GOS, et les stratégies les plus efficaces pour l'exploiter / Technology and socio-economic drivers are creating the conditions for a profound transformation, called “Softwarization”, of the Telco and ICT. Software-Defined Networks and Network Functions Virtualization are two of the key enabling technologies paving the way towards this transformation. Softwarization will allow to virtualize all network and services functions of a Telco infrastructure and executing them onto a software platforms, fully decoupled from the underneath physical infrastructure (almost based on standard hardware). Any services will be provided by using a “continuum” of virtual resources (processing, storage and communications) with practically very limited upfront capital investment and with modest operating costs. 5G will be the first exploitation of Softwarization. 5G will be a massively dense distributed infrastructure, integrating processing, storage and (fixed and radio) networking capabilities. In summary, the overall goal of this thesis has been investigating technical challenges and business opportunities brought by the “Softwarization” and 5G. In particular, the thesis proposes that the 5G will have to have a sort of Operating System (5GOS) capable of operating the converged fixed and RAN and core infrastructures. Main contributions of this thesis have been: 1) defining a vision for future 5G infrastructures, scenarios, use-cases and main requirements; 2) defining the functional architecture of an Operating System for 5G; 3) designing the software architecture of a 5G OS for the “Edge Cloud”; 4) understanding the techno-economic impacts of the vision and 5GOS, and the most effective strategies to exploit it

Submitted by William Justo Figueiro (williamjf) on 2015-08-11T20:18:35Z No. of bitstreams: 1 09e.pdf: 16235259 bytes, checksum: f4c7848215dc310dfc2432c167298610 (MD5) / Made available in DSpace on 2015-08-11T20:18:35Z (GMT). No. of bitstreams: 1 09e.pdf: 16235259 bytes, checksum: f4c7848215dc310dfc2432c167298610 (MD5) Previous issue date: 2014-12-17 / Nenhuma / A presente tese parte do conceito de Metrópole Comunicacional, proposto por Massimo Canevacci, conectando-o aos estudos de Lev Manovich, que explicitam uma crescente influência do software em nossa sociedade. Com estes dois pilares, esta pesquisa objetiva compreender a concepção de uma metrópole comunicacional softwarizada que emerge do uso de aplicativos para dispositivos móveis de comunicação (os smartphones). Essas mídias móveis tornaram-se parte essencial deste trabalho por proporcionarem mobilidade ao usuário que circula pelos espaços físicos, promovendo uma maior interação com o contexto territorial e ocasionando novas dinâmicas de comunicação e convívio. Dados referenciados no interior desta tese nos levam a crer que em pouco tempo praticamente todos os aparelhos de telefonia móvel serão smartphones, fato este que reconfigurará de vez as práticas urbanas estabelecidas. Além das características comunicacionais que carrega, a metrópole observada é também interpretada como um ambiente criativo, projetual, audiovisual e softwarizado, que recebe interferências de outras áreas do conhecimento, como o design. Neste contexto, um conjunto de aplicativos para dispositivos móveis (os apps) que exploram questões urbanas surge como um instrumento contemporâneo que conversa de diferentes formas com esta múltipla metrópole, desde a concepção de suas práticas até as mutações culturais que ocasionam. Para responder aos questionamentos desta pesquisa e identificar as transformações decorridas, fez-se uso do personagem flâneur, de Walter Benjamin, como recurso metodológico que ocasionou a definição e análise de 15 fragmentos contextuais extraídos da metrópole observada nos apps e em suas imagens. O cruzamento destes fragmentos destacou particularidades e dinâmicas que atualizaram o entendimento de Metrópole Comunicacional, interpretando-a como uma combinação entre suas ruas, avenidas e as dinâmicas ocasionadas pelos apps sobre elas, tal como acontece entre selfies e paisagens urbanas, entre check-ins e benefícios ganhos, entre a smarphonização que se instaura e a falta de sinal Wi-Fi predominante, uma mistura entre perder-se e não perder-se jamais, entre a cultura digital e os processos midiáticos, entre modelos, hábitos e experiências vividas, entre criatividade e projeto, entre vozes, meios e mensagens, entre compartilhamentos e dispositivos, ou ainda, uma composição entre os próprios aplicativos móveis e a metrópole comunicacional com que interagem. / This dissertation has as its starting point the concept of Comunicational Metropolis proposed by Massimo Canevacci, establishing a connection with the research of Lev Manovich, which explains an increasing influence of software in our society. Thus, taking these two pillars as a foundation, this research aims to understand the concept of a communicational metropolis that is emerging from the use of applications for mobile communication devices (smartphones). Mobile media has become a key part of this work since they provide mobility to the user who moves around physical spaces, promoting greater interaction with the local context and causing new communication and social dynamics. Data referenced within this thesis indicate that in a short period of time, almost all mobile handsets will be smartphones and will reconfigure once and for all the existing social practices. However, the metropolis observed in this study overcomes the communicational framework proposed, since it is also a creative, projectual, audiovisual and softwarized environment. In this context, a set of mobile applications exploring urban issues arise as a contemporary tool. In different ways, this tool dialogues with the multiple metropolis, from the design practices that daily occur in it, to the cultural transformations generated by this tool. In order to answer the research questions and to identify the changes that happened, Walter Benjamin’s character flâneur was used as a methodological resource that gave rise to the construction and analysis of 15 fragments extracted from a digital communicational metropolis observed through popular apps and its images. The intersection of these fragments highlighted peculiarities and dynamics that updated the understanding of a Communicational Metropolis, structuring it as a combination of its streets, avenues and dynamics caused by the apps. A combination of selfies and urban landscapes; check-ins and earned benefits; the established ‘smarphonization’ and the lack of predominant WiFi signal; getting lost and not ever getting lost; digital culture and media processes; models, habits and experiences; creativity and design; voices, media and messages; shares and devices; that is, a composition of mobile applications themselves and the communicational metropolis which they interact with.

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Les opérateurs de réseau sont confrontés à de grands défis en termes de coût et de complexité pour intégrer les nouvelles technologies de communication (e.g., 4G, 5G, fibre optique) et pour répondre aux demandes croissantes des nouveaux services réseau adaptés aux nouveaux cas d’utilisation. La "softwarization" des opérations réseau à l'aide des paradigmes SDN (Software Defined Networking) et NFV (Network Function Virtualization) est en mesure de simplifier le contrôle et la gestion des réseaux et de fournir des services réseau de manière efficace. Les réseaux programmables SDN permettent de dissocier le plan de contrôle du plan de données et de centraliser le plan de contrôle pour simplifier la gestion du réseau et obtenir une vision globale. Cependant, ceci amène des problèmes de passage à l'échelle difficiles à résoudre. Par ailleurs, en dissociant la partie matérielle de la partie logicielle des routeurs, NFV permet d'implanter de manière flexible et à moindre coût toutes sortes de fonctions réseau. La contrepartie est une dégradation des performances due à l'implantation en logiciel des fonctions réseau qui sont déportées des routeurs. Pour aborder les problèmes de passage à l'échelle et de performance des paradigmes SDN/NFV, nous proposons dans la première partie de la thèse, une architecture modulaire de gestion et de contrôle du réseau, dans laquelle le contrôleur SDN délègue une partie de ses responsabilités à des fonctions réseau spécifiques qui sont instanciées à des emplacements stratégiques de l'infrastructure réseau. Nous avons choisi un exemple d'application de streaming vidéo en direct (comme Facebook Live ou Periscope) utilisant un service de multicast IP car il illustre bien les problèmes de passage à l'échelle des réseaux programmables. Notre solution exploite les avantages du paradigme NFV pour résoudre le problème de scalabilité du plan de contrôle centralisé SDN en délégant le traitement du trafic de contrôle propre au service multicast à des fonctions réseau spécifiques (appelées MNF) implantées en logiciel et exécutées dans un environnement NFV localisé à la périphérie du réseau. Notre approche fournit une gestion flexible des groupes multicast qui passe à l'échelle. De plus, elle permet de bénéficier de la vision globale du contrôle centralisé apportée par SDN pour déployer de nouvelles politiques d'ingénierie du trafic comme L2BM (Lazy Load Balance Multicast) dans les réseaux de fournisseurs d’accès à Internet (FAI) programmables. L'évaluation de cette approche est délicate à mettre en œuvre car la communauté de recherche ne dispose pas facilement d'infrastructure SDN à grande échelle réaliste. Pour évaluer notre solution, nous avons élaboré l'outil DiG qui permet d'exploiter l'énorme quantité de ressources disponibles dans une grille de calcul, pour émuler facilement de tels environnements. DiG prend en compte les contraintes physiques (mémoire, CPU, capacité des liens) pour fournir un environnement d'évaluation réaliste et paramétrable avec des conditions contrôlées. La solution que nous proposons délègue le contrôle et la gestion du réseau concernant le service de multicast aux fonctions spécifiques MNF exécutées dans un environnement NFV. Idéalement, pour davantage d'efficacité, toutes ces fonctions spécifiques devraient être implantées directement au sein des routeurs avec du hardware programmable mais cela nécessite que ces nouveaux routeurs puissent exécuter de manière indépendante plusieurs fonctions réseau à la fois. Le langage de programmation P4 est une technologie prometteuse pour programmer le traitement des paquets de données dans les routeurs programmables (hardware et logiciels). / Network operators are facing great challenges in terms of cost and complexity in order to incorporate new communication technologies (e.g., 4G, 5G, fiber) and to keep up with increasing demands of new network services to address emerging use cases. Softwarizing the network operations using SoftwareDefined Networking (SDN) and Network Function Virtualization (NFV) paradigms can simplify control and management of networks and provide network services in a cost effective way. SDN decouples control and data traffic processing in the network and centralizes the control traffic processing to simplify the network management, but may face scalability issues due to the same reasons. NFV decouples hardware and software of network appliances for cost effective operations of network services, but faces performance degradation issues due to data traffic processing in software. In order to address scalability and performance issues in SDN/NFV, we propose in the first part of the thesis, a modular network control and management architecture, in which the SDN controller delegates part of its responsibilities to specific network functions instantiated in network devices at strategic locations in the infrastructure. We have chosen to focus on a modern application using an IP multicast service for live video streaming applications (e.g., Facebook Live or Periscope) that illustrates well the SDN scalability problems. Our solution exploits benefits of the NFV paradigm to address the scalability issue of centralized SDN control plane by offloading processing of multicast service specific control traffic to Multicast Network Functions (MNFs) implemented in software and executed in NFV environment at the edge of the network. Our approach provides smart, flexible and scalable group management and leverages centralized control of SDN for Lazy Load Balance Multicast (L2BM) traffic engineering policy in software defined ISP networks. Evaluation of this approach is tricky, as real world SDN testbeds are costly and not easily available for the research community. So, we designed a tool that leverages the huge amount of resources available in the grid, to easily emulate such scenarios. Our tool, called DiG, takes into account the physical resources (memory, CPU, link capacity) constraints to provide a realistic evaluation environment with controlled conditions. Our NFV-based approach requires multiple application specific functions (e.g., MNFs) to control and manage the network devices and process the related data traffic in an independent way. Ideally, these specific functions should be implemented directly on hardware programmable routers. In this case, new routers must be able to execute multiple independently developed programs. Packet-level programming language P4, one of the promising SDN-enabling technologies, allows applications to program their data traffic processing on P4 compatible network devices. In the second part of the thesis, we propose a novel approach to deploy and execute multiple independently developed and compiled applications programs on the same network device. This solution, called P4Bricks, allows multiple applications to control and manage their data traffic, independently. P4Bricks merges programmable blocks (parsers/deparsers and packet processing pipelines) of P4 programs according to processing semantics (parallel or sequential) provided at the time of deployment.

Network softwarization plays a significantly important role in the development and deployment of the latest communication system for 5G and beyond. A more flexible and intelligent network architecture can be enabled to provide support for agile network management, rapid launch of innovative network services with much reduction in Capital Expense (CAPEX) and Operating Expense (OPEX). Despite these benefits, 5G system also raises unprecedented challenges as emerging machine-to-machine and human-to-machine communication use cases require Ultra-Reliable Low Latency Communication (URLLC). According to empirical measurements performed by the author of this dissertation on a practical testbed, State of the Art (STOA) technologies and systems are not able to achieve the one millisecond end-to-end latency requirement of the 5G standard on Commercial Off-The-Shelf (COTS) servers. This dissertation performs a comprehensive introduction to three innovative approaches that can be used to improve different aspects of the current software-driven network data plane. All three approaches are carefully designed, professionally implemented and rigorously evaluated. According to the measurement results, these novel approaches put forward the research in the design and implementation of ultra-reliable low-latency, energy-efficient and computing-first software data plane for 5G communication system and beyond.