Dissertations / Theses on the topic 'Architecture du Réseau'
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Bertaux, Lionel. "Architecture réseau pour véhicule de transport en commun communiquant." Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00910772.
Full textLe, Crosnier Hervé. "Réseau, bibliothèques et documents numériques : architecture informatique et construction sociale." Habilitation à diriger des recherches, Université de Caen, 2007. http://tel.archives-ouvertes.fr/tel-00204139.
Full textAvec le développement accéléré du numérique et des réseaux, nous sommes les témoins d'un basculement fantastique des activités humaines, qui porte sur l'expression de la culture et de la communication, la transformation des processus industriels, les relations inter-personnelles, les activités de travail et de loisir des individus, les conditions d'exercice de la démocratie.
En moins d'une vingtaine d'années, le nombre et la puissance des ordinateurs mis dans les mains des individus a explosé, offrant aux personnes et aux groupes une capacité de traitement inimaginable auparavant. Leur couplage avec l'interconnexion des réseaux a bousculé la donne culturelle, relationnelle, économique, politique, géopolitique, éducative, sociale, médiatique....
La maîtrise de techniques symboliques (traitement d'images, stockage de fichiers numériques, usage du réseau comme ressource d'information, recherche documentaire, transcodage de la musique, écriture et publication personnelle) s'est répandue comme une traînée de poudre dans le monde entier.
Les tranches d'âge concernées se sont élargies en quelques années. La jeunesse et plus encore l'adolescence faisant un large usage des médiations techniques dans sa sociabilité et son apprentissage personnel. Le troisième âge découvre avec intérêt les techniques numériques, de l'appareil photo au mail, qui les gardent en contact avec leur descendance. Les différences d'usage entre les sexes se réduisent, et le travail des groupes de femmes pour utiliser la technologie comme un outil d'égalité et de libération porte des fruits dans tous les types de communautés, notamment dans les pays en développement.
Les divers réseaux et pratiques immatérielles convergent de plus en plus vite vers un réseau ubiquitaire, mêlant intimement les activités de communication, de production symbolique (culture, connaissance et divertissement) et de diffusion. Les terminaux se diversifient, se font mobiles (baladeurs, ordinateurs portables, PDA, téléphones mobiles nouvelle génération...) et s'incrustent dans toutes les activités (travail, culture, loisir, vie quotidienne).
Les principes d'individualité, de vie privée, d'autonomie et même de citoyenneté ne sont plus des qualités intrinsèques aux personnes, mais ressortent de l'émergence de " technologies de la personnalité " et de systèmes d'exposition et de gestion de la personnalité (réseaux sociaux, systèmes d'identification, auto-publication, partage d'environnements culturels ou de jeux, mondes virtuels...).
Le " système nerveux " de l'économie mondiale repose sur ces échanges immatériels accrus, sur les formes nouvelles de production qu'ils permettent, et sur la valorisation et la monétarisation des activités de connaissance, de communication, d'éducation et d'échange. Ces événements technologiques accompagnent et rendent possibles, ou imaginables, d'autres bouleversements dans l'organisation du monde, souvent regroupés sous le terme de " mondialisation " d'une part et de " société de l'information " de l'autre.
Ces bouleversements massifs et en profondeur méritent une attention particulière de la recherche, afin d'analyser ce phénomène au moment même de son bouillonnement, et d'en dégager des principes, des concepts et des grilles d'analyse qui permettent :
- de proposer de nouvelles applications, protocoles et architectures, d'une part pour les sciences de l'ingénieur ;
- de replacer les pratiques sociales, économiques et culturelles qui se cristallisent et se recomposent dans le réseau et le numérique, au sein du fil global de l'histoire et des données de long terme ;
- de repérer les fractures qui se constituent, afin que les sciences humaines et sociales puissent jouer un rôle éclairant pour les citoyens et les acteurs politiques et économiques.
[...] et les derniers mots de la conclusion
Les questions du domaine public et des biens communs de l'information, parce qu'elles permettent d'imaginer une société dans laquelle la transmission et le partage des connaissances serait un moment essentiel de la socialisation et de la vie collective me semblent des questions centrales, qu'il faut encore polir et repolir sur le métier de la recherche sur le document numérique et les réseaux.
Le numérique nous apporte des promesses inégalées de coopération et d'extension de la culture et de la connaissance. Comment permettre à tous les habitants de la planète d'en profiter ? Quels verrous faut ils ouvrir ? Quels ressorts de rêve et d'utopie peuvent être remontés pour que se libère une énergie libératrice ? Comment les réflexions techniques peuvent-elles accompagner un projet social mondial ?
Le chercheur, l'intellectuel et le citoyen sont convoqués pour travailler la compréhension de cet univers du numérique qui irrigue et transforme si profondément nos sociétés. Et faire coopérer les solutions techniques, juridiques, sociales et organisationnelles pour ouvrir des espaces publics mondiaux nouveaux. Ici et maintenant.
Cerović, Danilo. "Architecture réseau résiliente et hautement performante pour les datacenters virtualisés." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS478.
Full textThe amount of traffic in data centers is growing exponentially and it is not expected to stop growing any time soon. This brings about a vast amount of advancements in the networking field. Network interface throughputs supported today are in the range of 40Gbps and higher. On the other hand, such high interface throughputs do not guarantee higher packet processing speeds which are limited due to the overheads imposed by the architecture of the network stack. Nevertheless, there is a great need for a speedup in the forwarding engine, which is the most important part of a high-speed router. For this reason, many software-based and hardware-based solutions have emerged recently with a goal of increasing packet processing speeds. The networking stack of an operating system is not conceived for high-speed networking applications but rather for general purpose communications. In this thesis, we investigate various approaches that strive to improve packet processing performance on server-class network hosts, either by using software, hardware, or the combination of the two. Some of the solutions are based on the Click modular router which offloads its functions on different types of hardware like GPUs, FPGAs or different cores among different servers with parallel execution. Furthermore, we explore other software solutions which are not based on the Click modular router. We compare software and hardware packet processing solutions based on different criteria and we discuss their integration possibilities in virtualized environments, their constraints and their requirements. As our first contribution, we propose a resilient and highly performant fabric network architecture. Our goal is to build a layer 2 mesh network that only uses directly connected hardware acceleration cards that perform packet processing instead of routers and switches. We have decided to use the TRILL protocol for the communication between these smart NICs as it provides a better utilization of network links while also providing least-cost pair-wise data forwarding. The data plane packet processing is offloaded on a programmable hardware with parallel processing capability. Additionally, we propose to use the ODP API so that packet processing application code can be reused by any other packet processing solution that supports the ODP API. As our second contribution, we designed a data plane of the TRILL protocol on theMPPA (Massively Parallel Processor Array) smart NIC which supports the ODP API. Our experimental results show that we can process TRILL frames at full-duplex line-rate (up to 40Gbps) for different packet sizes while reducing latency. As our third contribution, we provide a mathematical analysis of the impact of different network topologies on the control plane’s load. The data plane packet processing is performed on the MPPA smart NICs. Our goal is to build a layer 2 mesh network that only uses directly connected smart NIC cards instead of routers and switches. We have considered various network topologies and we compared their loads induced by the control plane traffic. We have also shown that hypercube topology is the most suitable for our PoP data center use case because it does not have a high control plane load and it has a better resilience than fat-tree while having a shorter average distance between the nodes
Nassar, Rachad. "Une architecture convergente pour une continuité et personnalisation de services : aspects architectural et fonctionnel." Thesis, Paris, ENST, 2012. http://www.theses.fr/2012ENST0025/document.
Full textNowadays, with the advent of deregulation, service providers aim to be more competitive and to attract more subscribers in order to cope with the high market pressure. For this purpose, today's providers support a user-centric approach that consists on quickly providing user oriented services. This user-centric approach becomes more and more significant with the emergence of the next generation networks and services (NGN/NGS) context. Within this context, where network convergence and service convergence are omnipresent, the end-user becomes more nomadic and claims the access to any service, anywhere, anytime and by any means. His goal is to dynamically compose a personalized service session while converging a set of multi-domain services (Telco, Web and IT). Then, he wants to maintain the continuity of this service session throughout his spatial and temporal mobility. Within the scope of this thesis, we propose a novel service architecture, namely the NGN/NGS Middleware, that adopts an horizontal distributed event-driven and service oriented approachn and that is based on a novel service model. In addition, we propose two solutions for service continuity management, that are based on virtual communities and on a semantic handover. These solutions take into consideration the user's preferences and ambiant context. At the end, we think we could answer some cloud computing challenges by integrating our solutions to manage cloud users
Baumann, Cédric. "Architecture et gestion d'un réseau continu maillé haute-tension pour l'aéronautique." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT004H/document.
Full textAs the aircraft fuel consumption needs more efficient systems, electrical distribution becomes a favoured way in satisfying those needs. In this context, the “more electrical aircraft” notion implies to deeply refund distribution means. High Voltage Direct Current - HVDC - distribution helps in going this way. A general description of civil aircraft embedded systems is given in this document. Advantages and drawbacks of energetic vectors are described too, allowing a better comprehension of possible improvements due to system electrification. Therefore, the HVDC deployment can lead to new problems, particularly in quality and stability domains. In order to take into account these problems, we propose a new distribution architecture in which equipments are interconnected through power distribution centres, which ones are interconnected through power flow controller equipments. This new architecture is described as a meshed distribution network. Two kinds of equipment are proposed to control the electrical power flow: DCPFC - for Direct Current Power Flow Controller - and MAPFC - Mixed function for Actuation Power Flow Control. As a result, a specific power management is needed. Equipment operating modes and power to transfer references have to be determined. In a first step, a graph based modelling of the electrical network is done, resulting in a generic algorithm which permits to determine network structural equations. In a second step, two algorithms control the network: - Discrete quantities are regulated by an expert system based on a rule set; - Continuous quantities are managed through a flow research algorithm based on the graph modelling; The validation of these concepts is realised through electrical simulations of the whole meshed network. Then, an experimental test bench validates the theoretical principles and allows the operation of equipments and meshed network in multiple configurations. Finally, concepts are extrapolated in an electrical network respecting aeronautic constraints. Those constraints are highlighted at equipment level and network level
Baumann, C. "Architecture et gestion d'un réseau continu maillé haute-tension pour l'aéronautique." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2009. http://tel.archives-ouvertes.fr/tel-00554223.
Full textHsu, Tiente. "Proposition d'une architecture de réseau d'interconnexion à reconfiguration dynamique et asynchrone." Lille 1, 1993. http://www.theses.fr/1993LIL10052.
Full textBuyukkaya, Eliya. "Une architecture pair-à-pair pour les environnements virtuels en réseau." Paris 6, 2011. http://www.theses.fr/2011PA066124.
Full textVillain, Benjamin. "Nouvelle génération de contrôleur d'accès réseau : une approche par réseaux logiciels." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066663.
Full textThis thesis presents the importance of cross-layer network information for network applications in the context of network access control. The dissertation exposes a novel architecture in which a network access controller is mutualized in the Cloud. This architecture allows to address a key market segment for clients unwilling to buy expensive hardware to control their network. Multiple challenges come into play when hosting the controller remotely. Indeed cross-layer information are no longer available which prevents the controller from correctly controlling users activity. A first implementation to share cross-layer information is presented in chapter 2. It leverages specialized session border controllers to send these data in the application protocol, here HTTP. Then chapter 3 presents an innovative solution for the cross-layering problem which allows to intrumentalize network flows with SDN protocols. The solution focuses on a web portal redirection but is extendable to any kind of protocols. The implementation permits to intercept and modify flows in order to input cross-layer data within another network protocol. This solution was implemented in the OpenDaylight OpenFlow controller and shows great results. The mutualized approach coupled with the SDN cross-layer framework allow to build flexible networks with almost no configuration of on-site equipments. The central network controller reduces the overal cost of the solution by being mutualized among multiple clients. Moreover, having the ability to intrumentalize network traffic in software allows to implement any kind of custom behavior on the runtime
Pujol, Hubert. "Réseau d'interconnexion haut débit pour les architectures parallèles connexionnistes." Paris 11, 1994. http://www.theses.fr/1994PA112192.
Full textNassar, Rachad. "Une architecture convergente pour une continuité et personnalisation de services : aspects architectural et fonctionnel." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0025.
Full textNowadays, with the advent of deregulation, service providers aim to be more competitive and to attract more subscribers in order to cope with the high market pressure. For this purpose, today's providers support a user-centric approach that consists on quickly providing user oriented services. This user-centric approach becomes more and more significant with the emergence of the next generation networks and services (NGN/NGS) context. Within this context, where network convergence and service convergence are omnipresent, the end-user becomes more nomadic and claims the access to any service, anywhere, anytime and by any means. His goal is to dynamically compose a personalized service session while converging a set of multi-domain services (Telco, Web and IT). Then, he wants to maintain the continuity of this service session throughout his spatial and temporal mobility. Within the scope of this thesis, we propose a novel service architecture, namely the NGN/NGS Middleware, that adopts an horizontal distributed event-driven and service oriented approachn and that is based on a novel service model. In addition, we propose two solutions for service continuity management, that are based on virtual communities and on a semantic handover. These solutions take into consideration the user's preferences and ambiant context. At the end, we think we could answer some cloud computing challenges by integrating our solutions to manage cloud users
Faure, Cécile. "Interconnexion de réseaux informatiques et réseau numérique à intégration de services : modélisation et vérification d'architectures de communication." Toulouse 3, 1990. http://www.theses.fr/1990TOU30157.
Full textLattard, Didier. "Architecture massivement parallèle : un réseau de cellules intégré pour la reconstruction d'images." Phd thesis, Grenoble INPG, 1989. http://tel.archives-ouvertes.fr/tel-00335786.
Full textTurbelin, Clément. "Architecture et standardisation des systèmes de surveillance épidémiologique : application au réseau sentinelles." Paris 6, 2013. http://www.theses.fr/2013PA066598.
Full textThe objective of this thesis was to show up how public health surveillance integrates evolutions of information technologies. A literature review first presents the state of the art of data sources used by public health surveillance systems for human disease surveillance, the architecture used to build such system the treatments applied to data in order to assess the surveillance goal and finally the data standardization in the field to exchange input and output data of these systems. A second part presents our work in the field:1 – JSentinel, is a desktop-based generic data collection tool based on an abstract data model and communication protocol. An evaluation of its usage by GPs of the French Sentinelles network showed a reduction of the notification delay and an increase of the rate of provided individual data for each notified case. 2 – Two solutions were compared to standardize exchanges of data from PHS systems: SDMX-HD (Statistical Data and Metadata Exchange) and OData. These two solutions were implemented to publish French Sentinelles network’s data. SDMX-HD based solution, by promoting an harmonization of metadata and data structure leads to a better interoperability and the OData solution, supported by a wide ecosystem allows to easily publish data but does not propose a common data model. Sustainability of these standards is also a blocking factor to promote them as a standard candidate. 3 – In a third work we used query log data from the Google‘s search engine as surveillance data for several infectious diseases and compare it to the French Sentinelles network’s incidence rates. Finally the results and future evolutions are discussed
Lemattre, Thibault. "Allocation de fonctions de commande de systèmes critiques par recherche d'atteignabilité dans un réseau d'automates communicants." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-00916583.
Full textLoeuillet, Jean-Louis. "Implémentation d'un protocole de niveau réseau sur un réseau local de type GIXINET." Paris 11, 1987. http://www.theses.fr/1987PA112360.
Full textGarcés-Erice, Luis. "Un réseau P2P hiérarchique : design et applications." Paris, ENST, 2004. http://www.theses.fr/2004ENST0016.
Full textIn this work we focus on structured P2P systems. We start consideringDHT design issues, presenting a hierarchical P2P system framework weelaborate upon. We enumerate the hierarchical organization maincharacteristics and advantages: specifically, the capacity of thesesystems to improve networked communication performance by adapting tothe Internet topology, and to increase the robustness of flat P2Psystems by differentiating peer roles according to theircapabilities. We develop a hierarchical DHT named TOPLUS, which isbuilt by grouping peers in the same IP Network Prefix, and arrangingthese groups following the Internet hierarchical topology: Its look-upis able to find the peer responsible for a resource in time comparableto the level-3 routing of the resource request from the peeroriginating the query to the destination peer where the resource islocated. Because the structure of TOPLUS follows that of the Internet,we say that TOPLUS is topology-aware. For Content Distribution wepresent MULTI+, an application-level multicast P2P network that workson top of TOPLUS. MULTI+ builds multicast trees that attempt shortestpossible average delay from the multicast information source to therecipients in the multicast group, while trying to use bandwidthefficiently. We also test how robust these delay and bandwidthproperties are when massive peer failure occurs. Finally, we useindexing of resources using predefined indexing schemes for ContentLocation. Each index is used as the key to find other indexes withmore precise information about a given resource, and the indexcompletely describing the item is the key corresponding to theresource
Del, Piccolo Valentin. "Isolation réseau dans un environnement Cloud Public/Hybride." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066050.
Full textCloud computing uses infrastructure with a lot of computing and storage resources. There are three types of cloud: Public cloud, Private cloud, and Hybrid cloud. In order to provide a hybrid cloud solution, we used as a base the TRILL protocol which optimizes the use of the data center infrastructure. However, TRILL cannot interconnect data centers as doing so will merge the data centers networks and each data center will lose its independence. Our first contribution is to change this behavior and we develop MLTP which allows to interconnect TRILL or MLTP network without merging them. Another functionality missing from TRILL is network isolation. To fill this lack, in our second proposal we add to MLTP a solution called VNT and we then have a new protocol called MLTP+VNT. In this protocol, each user traffic is isolated from one another. Therefore, MLTP+VNT allows to have a hybrid cloud environment. Nevertheless, it has two shortcomings. The first one is its “single” point of failure. As a matter of fact, MLTP+VNT uses a new type of nodes called Border RBridges which contains inter-data centers routing information. If a Border RBridge fails, then the information it contained is lost. In order to prevent this loss, we implement a method to synchronize the Border RBridges in our third contribution. The second shortcoming is the obligation to use MLTP+VNT in each network to form the hybrid cloud. To lift this limitation, we design and develop, in our fourth contribution, a bridge between a MLTP+VNT network and an OpenFlow network. This way, our solution allows to create a hybrid cloud environment with the MLTP+VNT solution in the public cloud and OpenFlow in the public cloud
Abadi, Mehdi. "Réalisation d'un réseau de neurones "SOM" sur une architecture matérielle adaptable et extensible à base de réseaux sur puce "NoC"." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0068/document.
Full textSince its introduction in 1982, Kohonen’s Self-Organizing Map (SOM) showed its ability to classify and visualize multidimensional data in various application fields. Hardware implementations of SOM, by exploiting the inherent parallelism of the Kohonen algorithm, allow to increase the overall performances of this neuronal network, often at the expense of the flexibility. On the other hand, the flexibility is offered by software implementations which on their side are not suited for real-time applications due to the limited time performances. In this thesis we proposed a distributed, adaptable, flexible and scalable hardware architecture of SOM based on Network-on-Chip (NoC) designed for FPGA implementation. Moreover, based on this approach we also proposed a novel hardware architecture of a growing SOM able to evolve its own structure during the learning phase
Abadi, Mehdi. "Réalisation d'un réseau de neurones "SOM" sur une architecture matérielle adaptable et extensible à base de réseaux sur puce "NoC"." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0068.
Full textSince its introduction in 1982, Kohonen’s Self-Organizing Map (SOM) showed its ability to classify and visualize multidimensional data in various application fields. Hardware implementations of SOM, by exploiting the inherent parallelism of the Kohonen algorithm, allow to increase the overall performances of this neuronal network, often at the expense of the flexibility. On the other hand, the flexibility is offered by software implementations which on their side are not suited for real-time applications due to the limited time performances. In this thesis we proposed a distributed, adaptable, flexible and scalable hardware architecture of SOM based on Network-on-Chip (NoC) designed for FPGA implementation. Moreover, based on this approach we also proposed a novel hardware architecture of a growing SOM able to evolve its own structure during the learning phase
Riquet, Damien. "DISCUS : une architecture de détection d'intrusions réseau distribuée basée sur un langage dédié." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10207/document.
Full textNowadays, information systems are everywhere and their interconnexion is almost complete. The rise of complex and large computing infrastructures has brought a need for increased security. We need to follow a sound methodology so that one can understand an exploit develop a counter-measure and deploy it as soon as possible. To tackle those issues, we propose DISCUS, a new distributed architecture that takes advantage of existing solutions as well as distributed probes. This approach leads to finer, collaborative analysis where each probe enrich the global knowledge of the architecture as a whole. Our solution introduces two main issues : determine efficient distribution mechanism to implement collaboration and facilitate the developpement of the software that will run on highly heterogeneous hardware. This thesis mainly focuses on the later. The actual development of the software that will run on the probes can not be made by a security special or a system administrator because of the diversity of the probes (in term of memory, computing power, network location…). This would imply that the developer has strong knowledge on security, networking, kernel development, embeded systems, hardware development. Such a developer is hard to find. To overcome this problem, we propose DISCUS, a domain specific language. With this langage, one can implement security rules without the need to take implementation details into account. Our compiler chain takes the rules and is able to build software, or hardware, image specific for each probes of the network. This thesis presents this language, some case studies and its evaluation in term of expressivity, robustness and performances
Devaux, Ludovic. "Réseaux d'interconnexion flexible pour architecture reconfigurable dynamiquement." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00746290.
Full textDel, Piccolo Valentin. "Isolation réseau dans un environnement Cloud Public/Hybride." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066050/document.
Full textCloud computing uses infrastructure with a lot of computing and storage resources. There are three types of cloud: Public cloud, Private cloud, and Hybrid cloud. In order to provide a hybrid cloud solution, we used as a base the TRILL protocol which optimizes the use of the data center infrastructure. However, TRILL cannot interconnect data centers as doing so will merge the data centers networks and each data center will lose its independence. Our first contribution is to change this behavior and we develop MLTP which allows to interconnect TRILL or MLTP network without merging them. Another functionality missing from TRILL is network isolation. To fill this lack, in our second proposal we add to MLTP a solution called VNT and we then have a new protocol called MLTP+VNT. In this protocol, each user traffic is isolated from one another. Therefore, MLTP+VNT allows to have a hybrid cloud environment. Nevertheless, it has two shortcomings. The first one is its “single” point of failure. As a matter of fact, MLTP+VNT uses a new type of nodes called Border RBridges which contains inter-data centers routing information. If a Border RBridge fails, then the information it contained is lost. In order to prevent this loss, we implement a method to synchronize the Border RBridges in our third contribution. The second shortcoming is the obligation to use MLTP+VNT in each network to form the hybrid cloud. To lift this limitation, we design and develop, in our fourth contribution, a bridge between a MLTP+VNT network and an OpenFlow network. This way, our solution allows to create a hybrid cloud environment with the MLTP+VNT solution in the public cloud and OpenFlow in the public cloud
Villain, Benjamin. "Nouvelle génération de contrôleur d'accès réseau : une approche par réseaux logiciels." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066663/document.
Full textThis thesis presents the importance of cross-layer network information for network applications in the context of network access control. The dissertation exposes a novel architecture in which a network access controller is mutualized in the Cloud. This architecture allows to address a key market segment for clients unwilling to buy expensive hardware to control their network. Multiple challenges come into play when hosting the controller remotely. Indeed cross-layer information are no longer available which prevents the controller from correctly controlling users activity. A first implementation to share cross-layer information is presented in chapter 2. It leverages specialized session border controllers to send these data in the application protocol, here HTTP. Then chapter 3 presents an innovative solution for the cross-layering problem which allows to intrumentalize network flows with SDN protocols. The solution focuses on a web portal redirection but is extendable to any kind of protocols. The implementation permits to intercept and modify flows in order to input cross-layer data within another network protocol. This solution was implemented in the OpenDaylight OpenFlow controller and shows great results. The mutualized approach coupled with the SDN cross-layer framework allow to build flexible networks with almost no configuration of on-site equipments. The central network controller reduces the overal cost of the solution by being mutualized among multiple clients. Moreover, having the ability to intrumentalize network traffic in software allows to implement any kind of custom behavior on the runtime
Briday, Mikaël. "Validation par simulation fine d'une architecture opérationnelle." Nantes, 2004. http://www.theses.fr/2004NANT2097.
Full textThe validation of real time systems is an essential activity because consequences of an error could be catastrophic. The approach chosen in this PhD thesis is at the end of the development cycle, when the application software is available, at least important parts. The objective is the simulation of the whole operational architecture, which includes an accurate model of the hardware architecture (processors and network) and a software architecture, indirectly trough the executable code (application code and basic software). An important contribution of this thesis is based on generic mechanisms to extract information from the "low level" simulation of the assembly code in a distributed context, to deduce useful "high level" information to the developer. The work is focused on the data flow analysis, the analysis of the schedule of the final application code and the task's stack analysis, implemented into the ReTiS tool
Lemaire, Romain. "Conception et modélisation d'un système de contrôle d'applications de télécommunication avec une architecture de réseau sur puce (NoC)." Grenoble INPG, 2006. https://tel.archives-ouvertes.fr/tel-00109280.
Full textThis thesis deals with the architecture of Systems-on-Chip (SoC) which integrate physical layer functionalities of telecommunication applications. Such systems require high-performance communication structures and we have studied a Network-on-Chip (NoC) architecture based on the FAUST framework developed by the LETI. In this context, the thesis contributions focus on the design and modelling of a control architecture for management of complex applications distributed on a NoC. First, we present a modelling environment based on the NS-2 simulator. This software environment gives us tools to analyse communication needs of targeted applications and to adjust network parameters. The FAUST architecture has been validated in the case of data traffic for a MC-CDMA (multi-carrier, code division multiple access) processing chain. Results are confirmed by a SystemC model of the FAUST network. Then, we expose our works on the development of an architecture for communication management and processing control on a NoC. The proposed solution uses a reconfigurable network interface architecture combined with each processing unit. A central processor programs instructions sequences in the interfaces corresponding to loading scenarios of configurations that are stored in a server. The performances of the whole approach have been validated with a VHDL/SystemC mixed simulation environment
Rünneburger, Estelle. "Évolution de la canalisation génétique dans un modèle quantitatif de réseau de régulation." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS547/document.
Full textGenetic canalization is defined as the capacity of an organism to undergo a normal development even when the genome is altered by mutations. Currently, three main hypotheses are prone to explain the apparition of such a process: evolutionary, congruent and intrinsic. To test these hypotheses, I chose to study gene regulatory networks. To this end, I used a theoretical model, ran in silico simulations, and analyzed the genetic architecture by using quantitative genetics tools. I first studied the evolutionary behavior of the model, and its capacity to respond to stabilizing selection. In addition to the sensitivity analysis to model parameters, I evidenced the absence of mutation-selection-drift equilibrium after several thousand generations, which reveals the evolution of canalization. I also showed that networks submitted to frequent and large mutations, and/or selected toward extreme phenotypic optima are more prone to evolve genetic canalization. This result leads us to propose a two-fold mechanism able to explain the evolution of canalization in gene regulatory networks: shrinkage of mutational targets and redundancy in genetic regulation. At the end of this manuscript, I propose some possible future studies, such as the study of canalization towards environmental perturbations, and use of alternative models
Kilany, Rima. "Conception, implémentation et simulation d’un réseau actif ouvert et contrôlable." Paris, ENST, 2003. http://www.theses.fr/2003ENSTA001.
Full textActive Networks promise to boost the reactivity of operators by opening up network equipments. However their security, performance, flexibility and interoperability are still critical issues. This thesis proposes an architecture, which controls and secures dynamic deployment of active services. Implemented first by extending the widely used active network platform ANTS, a novel component-based approach was then proposed in modeling active nodes in conformity to the DARPA Architectural Framework. The usefulness of our work was expressed through the building of an active differentiated network by dynamic deployment of scheduling algorithms. In order to validate these implementations, we implemented two active network simulators, first by extending the widely used discrete event simulator ns-2, second by extending the component-based network simulation environment Javasim, which is highly reusable, extensible, flexible and scalable
Lorenz, Pascal. "Le temps dans les architectures de communication : application au réseau de terrain FIP." Vandoeuvre-les-Nancy, INPL, 1994. http://docnum.univ-lorraine.fr/public/INPL_T_1994_LORENZ_P.pdf.
Full textLouge, Robert. "Un système de gestion réseau hétérogène en milieu industriel." Toulouse 3, 1992. http://www.theses.fr/1992TOU30158.
Full textGourlat, Guillaume. "Conception de circuit intégré pour les applications gravimétriques basées sur l’utilisation de résonateurs mécaniques arrangés en réseau." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT089/document.
Full textThe extreme sensitivity of nano electro mechanical system (NEMS) to atomic scale physical variations has led to the breakthrough development of NEMS- based mass spectrometry sys- tems capable of measuring a single molecule. Parallel sensing using thousands of devices will help to circumvent the small effective sensing area while opening new perspectives for applica- tions which require spatial mapping. While the development of NEMS CMOS co-integration technology is of paramount importance to achieve high density sensor arrays (>1000 devices), the readout circuitry capable of tracking NEMS resonator frequency shifts is still the limiting factor for the very large scale integration of individually addressed sensors. Moreover, in order to resolve the mass and position of an adsorbed analyte, single particle mass sensing appli- cations require to track simultaneously and in real time at least two modes of the resonators. This requirement adds complexity to the design of the overall system. To respond to the size, power consumption and resolution constraints linked to NEMS array measurement, this work focuses on the development of a new readout architecture based upon a dual mode heterodyne oscillator. This work also emphasis the effort made on the modelization and co-simulation of the NEMS devices with their readout electronics. Then, the manuscript describe the first results of the CEA/LETI CMOS co-integraton process developed to tackle the sensor density challenge of mass spectrometry application. Finally, present the two integrated circuit that were designed during this thesis. The first one was a proof of concept for the aforementioned oscillator architecture while the second one combine the architecture with the co-integration processus developed
Le, Quéré Damien. "Conception et étude des performances d'une solution auto-configurable pour les réseaux de transport du futur." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S098.
Full textIn this thesis, we study the LOCARN solution “Low Opex & Capex Architecture for Resilient Networks". LOCARN is an alternative packet network architecture that has been conceived with a special attention to the simplicity of its structure and mechanisms while allowing by design the resiliency and the self-adaptation of clients transportation services. Considering the growing complexification of operators transport networks during the last decades, we consider these latter as the privileged use case. In such a context, LOCARN would allow a drastical simplification of devices and their operation compared to common operator solutions – this involves respectively reductions of CAPEX and OPEX. In this work, we first present LOCARN technically and we bring out its interests for operators beside other transport technologies. Then, since the primary issue of LOCARN is it scalability for large networks, we study this point in details which allow us to establish that the architecture is altogether capable to scale in realistics transport networks. Moreover, to increase the performances we specified two design improvements allowing the architecture to transport a huge amount of clients, the obtained results are very encouraging
Choungmo, Fofack Nicaise Éric. "Sur des modèles pour l’évaluation de performance des caches dans un réseau cœur et de la consommation d’énergie dans un réseau d’accès sans-fil." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4006/document.
Full textInternet is a real ecosystem. It grows, evolves and adapts to the needs of users in terms of communication, connectivity and ubiquity of users. In the last decade, the communication paradigm has shifted from traditional host-to-host interactions to the recent host-to-content model; while various wireless and networking technologies (such as 3/4G smartphones and networks, online media streaming, social networks, clouds, Big-Data, information-centric networks) emerged to enhance content distribution. This development shed light on scalability and energy efficiency issues which can be formulated as follows. How can we design or optimize such large scale distributed systems in order to achieve and maintain high-speed access to contents while (i) reducing congestion and energy consumption in the network and (ii) adapting to the temporal locality of users demand in a continuous connectivity paradigm? In this thesis we focus on two solutions proposed to answer this question: In-network caching and Power save protocols for scalability and energy efficiency issues respectively. Precisely, we propose analytic models for designing core cache networks and modeling energy consumption in wireless access networks. Our studies show that the prediction of the performance of general core cache networks in real application cases can be done with absolute relative errors of order of 1%–5%; meanwhile, dramatic energy save can be achieved by mobile devices and base stations, e.g., as much as 70%–90% of the energy cost in cells with realistic traffic load and the considered parameter settings
Corre, Olivier. "Gestion dynamique de services par politiques dans un réseau d'opérateur de télécommunications." Paris 6, 2004. http://www.theses.fr/2004PA066065.
Full textZeng, Xuan. "Vers une mobilité transparente dans le réseau ICN : connectivité, sécurité, et fiabilité." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS046/document.
Full textWith the proliferation of mobile devices, mobility becomes a requirement and a compelling feature for 5G. However, despite tremendous efforts in the last 2 decades to enable mobility in IP network, the solutions are mostly anchor-based and inefficient. In this context, Information-Centric networking (ICN) is proposed. While ICN has some native support of mobility, other architectural challenges remain unsolved to achieve seamless mobility. The thesis explores 3 main challenges of such and contributes novel solutions. First, to solve producer mobility, MapMe, a micro mobility management protocol supporting latency sensitive traffic is proposed. MAP-Me is anchorless and preserves key ICN benefits. Simulation results show that MAP-Me outperforms existing work in user performance while retaining low network overheads in various network conditions. Second, we investigate security in producer mobility. We focus on prefix hijacking attack, which is a basis of several attacks. To prevent prefix hijacking, we propose a light-weight and distributed prefix attestation protocol based on hash-chaining. First results show significant improvement in verification overhead. It is resistant to replay-based prefix hijacking. Finally, additional transport-layer mechanisms are needed in mobile ICN. To this aim, we investigate alleviating the adverse effect of wireless/mobility loss on congestion control. We propose WLDR and MLDR for in-network loss detection and recovery to facilitate congestion control. Simulation results show a significant reduction in flow completion time (up to 20%)
Berrayana, Wafa. "Architecture cross-layer pour la gestion de la Qualité de Service dans les réseaux sans fil." Paris 6, 2009. http://www.theses.fr/2009PA066135.
Full textDurand, Stéphane. "TOM, une architecture connexionniste de traitement de séquences : application à la reconnaissance de la parole." Nancy 1, 1995. http://www.theses.fr/1995NAN10411.
Full textPamba, Capo-Chichi Medetonhan Shambhalla Eugène William. "Conception d’une architecture hiérarchique de réseau de capteurs pour le stockage et la compression de données." Besançon, 2010. http://www.theses.fr/2010BESA2031.
Full textRecent advances in various aeras related to micro-electronics, computer science and wireless networks have resulted in the development of new research topics. Sensor networks are one of them. The particularity of this new research direction is the reduced performances of nodes in terms of computation, memory and energy. The purpose of this thesis is the definition of a new hierarchical architecture of sensor networks usable in different contexts by taking into account the sensors constraints and providing a high quality data such as multimedia to the end-users. We present our hierachical architecture with different nodes and the wireless technologies that connect them. Because of the high consumtpionof data transmission, we have developped two data compression algortithms in order to optimize the use of the channel by reducing data transmitted. We also present a solution for storing large amount of data on nodes by integrating the file system FAT16 under TinyOS-2. X
Galilée, Bruno. "Etude d'adéquation algorithme-architecture pour terminaux multimedia portables : segmentation d'images par un réseau de processeurs asynchrones." Grenoble INPG, 2002. http://www.theses.fr/2002INPG0098.
Full textThis thesis aims to answer to the following question: ±Is it possible to implement an object oriented video coder into a multimedia handset?α In order to provide a piece of answer to this large problem, this thesis aims to study the algorithm architecture adequacy of the segmentation operator needed by the whole system. We propose a totaly unsynchronized version of the segmentation algorithm Hill-Climbing, and its asynchronous microelectronic implementation. After a state of the art about segmentation algorithms, we propose a new asynchronous version of Hill-Climbing algorithm where each pixel is autonomous. We demonstrate that its comportment get to a correct picture segmentation. With the SystemC hardware modeling environment, we simulate and validate architectures from the finest granularity (one asynchronous processor per pixel) to the coarsest, and we demonstrate that the algorithm-architecture couple is appropriate. Finally, a low level conception in CHP and VHDL language shows the feasibility of such a circuit
Abdelilah, Jadbane. "Étude et conception d'un réseau linéaire de contrôle du processeur pyramidal SPHINX." Paris 11, 1986. http://www.theses.fr/1986PA112051.
Full textLetellier, Laurent. "Synthèse d'images temps réel sur réseau linéaire de processeurs SIMD : algorithmes et architectures." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT143H.
Full textKone, Cheick-Tidjane. "Conception de l'architecture d'un réseau de capteurs sans fil de grande dimension." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00650839.
Full textMaxa, Jean-Aimé. "Architecture de communication sécurisée d'une flotte de drones." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30102/document.
Full textAdvances in miniaturization of embedded systems have helped to produce small Unmanned Aerial Vehicles (UAVs) with highly effective capacity. In order to improve their capability in civilian complex missions (for instance, to bypass an obstruction), it is now possible to deploy UAV swarms, in which cooperative UAVs share different tasks. This type of operations needs a high level of coordination between UAVs and Ground Control Station (GCS) through a frequent exchange of information. The communication capabilities are therefore an important objective to achieve for effective UAV swarm operations. Several communication architectures can be used to allow communication between UAVs and GCS. Ad hoc network is one of them and is an effective and promising solution for multi-UAV systems. Such a network is called UAANET (UAV Ad hoc Network) and is an autonomous system made of a UAV swarm and one or several GCS (Ground Control Station). This network can also be considered as a sub category of the well-known MANET (Mobile Ad hoc network). However, it has some specific features (such as node velocity, specific mobility model) that can impact performance of routing protocols. Furthermore, the nature of the wireless medium, along with the lack of fixed infrastructure, which is necessary to verify node and message authentication, create security breaches. Specifically, given the critical characteristic of the real-time data traffic, message authentication proves to be an important step to guarantee the security of the final UAS (composed of UAV swarm). Security of routing protocols has been widely investigated in wired networks and MANETs, but as far as we are aware, there is no previous research dealing with the security features of UAANET routing protocols. Those existing solutions can be adapted to meet UAANET requirements. With that in mind, in this thesis, we propose a secure and reliable communication architecture for a UAV swarm. In this work, the creation of UAANET has first been concieved. In order to do this, we studied the impact of existing MANET routing protocols into UAANET to assess their performance and to select the best performer as the core of our proposed secure routing protocol. Accordingly, we evaluated those existing routing protocols based on a realistic mobility model and realistic UAANET environment. Based on this first study, we created a secure routing protocol for UAANET called SUAP (Secure UAV Ad hoc routing Protocol). On the one hand, SUAP ensures routing services by finding routing paths between nodes to exchange real time traffic (remote monitoring video traffic). On the other hand, SUAP ensures message authentication and provides detection to avoid wormhole attack. The SUAP routing protocol is a reactive routing protocol using public key cryptography and hash chains. In order to detect wormhole attack, a geographical leash-based algorithm is used to estimate the correlation between the packet traveled distance and the hop count value. We also contribute to the certification of the secure communication system software through a Model-Driven Development (MDD) approach. This certification is needed to validate the operation of the UAV swarm, especially in cases where it is used to exchange control and command traffic. We used Simulink and Stateflow tools and formal verification tools of Matlab Software to design SUAP routing protocol. The evaluation of the effectiveness of SUAP has been executed both through emulation and real experiment studies. Our results show that SUAP ensures authentication and integrity security services and protects against a wormhole attack. It also provides an acceptable quality of service for real-time data exchanges
Amiot, Franck. "Vers une architecture parallèle reconfigurable dédiée au traitement d'image et à la vision." Rouen, 2000. http://www.theses.fr/2000ROUES077.
Full textSammoud, Khaled. "Ingénierie du déploiement des services de télécommunications sous contraintes de QoS." Paris, ENST, 2001. http://www.theses.fr/2001ENST0014.
Full textIdrissi, Kaitouni Bahia. "Réalisation d'un transfert de fichiers OSI dans un environnement de réseau X.25. Organisation fonctionnelle et architecture." Doctoral thesis, Universite Libre de Bruxelles, 1990. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213144.
Full textLouvel, Maxime. "Architecture de gestion et de contrôle des ressources pour les applications multimédia dans le réseau local domestique." Phd thesis, Université de Bretagne occidentale - Brest, 2011. http://tel.archives-ouvertes.fr/tel-00649503.
Full textZeng, Xuan. "Vers une mobilité transparente dans le réseau ICN : connectivité, sécurité, et fiabilité." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS046.
Full textWith the proliferation of mobile devices, mobility becomes a requirement and a compelling feature for 5G. However, despite tremendous efforts in the last 2 decades to enable mobility in IP network, the solutions are mostly anchor-based and inefficient. In this context, Information-Centric networking (ICN) is proposed. While ICN has some native support of mobility, other architectural challenges remain unsolved to achieve seamless mobility. The thesis explores 3 main challenges of such and contributes novel solutions. First, to solve producer mobility, MapMe, a micro mobility management protocol supporting latency sensitive traffic is proposed. MAP-Me is anchorless and preserves key ICN benefits. Simulation results show that MAP-Me outperforms existing work in user performance while retaining low network overheads in various network conditions. Second, we investigate security in producer mobility. We focus on prefix hijacking attack, which is a basis of several attacks. To prevent prefix hijacking, we propose a light-weight and distributed prefix attestation protocol based on hash-chaining. First results show significant improvement in verification overhead. It is resistant to replay-based prefix hijacking. Finally, additional transport-layer mechanisms are needed in mobile ICN. To this aim, we investigate alleviating the adverse effect of wireless/mobility loss on congestion control. We propose WLDR and MLDR for in-network loss detection and recovery to facilitate congestion control. Simulation results show a significant reduction in flow completion time (up to 20%)
Ruel, Silvain. "Évaluation des bornes des performances temporelles des Architectures d'Automatisation en Réseau par preuves itératives de propriétés logiques." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2009. http://tel.archives-ouvertes.fr/tel-00405783.
Full textKrommenacker, Nicolas. "Heuristiques de conception de topologies réseaux : application aux réseaux locaux industriels." Nancy 1, 2002. http://docnum.univ-lorraine.fr/public/SCD_T_2002_0267_KROMMENACKER.pdf.
Full textIndustrial Ethernet is a controversial discussion topic mainly due to its non-determinism. Many researches focus on the improvement of Ethernet's capabilities to deliver the deterministic performance required by critical applications. Generally, that is obtained by modifying the Ethernet protocol or the traffic generated by the applications. Furthermore, the industrial context imposes a links redundancy in order to provide reliable architectures. That is why we propose to improve the switched Ethernet topology performances by optimizing the network organization at the level of the physical layer. Some graph partitioning techniques have been used in order to design optimized topologies which guarantee bounded maximum end to end delays. Two heuristics have been developed and adapted to this network design problem. The obtained results show the interest of the proposed method