Dissertationen zum Thema „Logiciel temps réel pour la radio-logicielle“
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Tchidjo, Moyo Noël. „Architecture logicielle et méthodologie de conception embarquée sous contraintes temps réel pour la radio logicielle“. Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00603708.
Der volle Inhalt der QuelleTchidjo, Moyo Noël Bertrand. „Architecture logicielle et méthodologie de conception embarquée sous contraintes temps réel pour la radio logicielle“. Rennes 1, 2011. https://tel.archives-ouvertes.fr/tel-00603708.
Der volle Inhalt der QuelleThis study addresses the problem of real-time scheduling of software components executing in a digital signal processor in a software radio context. It aims at providing new tooling for software radio design. Real-time scheduling analysis of flexible signal processing applications executing in a processor is currently done manually, using ad hoc methods, and taking significant margins. Given the foreseen increase of software components of the physical layer executing simultaneously on a processor in future software radios, these methods for scheduling analysis will be error-prone, time consuming and will often fail to find a feasible schedule even when one exists. For that purpose, this thesis defines a new task model which represents more precisely the behaviour of the tasks in certain software radio context: the non-cylic GMF (Generalized Multi-Frame) model. For this model, we present a formula to compute response time of tasks, as well as a new sufficient feasibility test for tasks executing in a processor according to the “Earliest Deadline First” scheduling policy. We also provide for this task model an efficient algorithm, for exact feasibility determination. We present in this thesis a new MDE (Model Driven Engineering) design methodology, to specify the parameters which make possible a real-time scheduling analysis of software components executing in a processor. This thesis proposes methods to compute real-time constraints in a software radio. It presents the elements of the MARTE standard to be used, to note the constraints in the model as well as model transformation rules to obtain a suitable model for real-time scheduling analysis. This thesis presents an approach, implemented as a simulation tool, to realize real-time scheduling analysis of tasks implementing flexible signal processing algorithms in a processor and scheduled according to a hybrid scheduling policy. This tool is integrated into the proposed MDE design methodology
Wang, Tsu-Han. „Real-time Software Architectures and Performance Evaluation Methods for 5G Radio Systems“. Electronic Thesis or Diss., Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS362.pdf.
Der volle Inhalt der QuelleThe thesis deals with 5G real-time Software Defined Radio architectures. In order to match 5G performance requirements, computational acceleration combined with real-time process scheduling methods are required. In 5G embedded systems acceleration amounts to a judicious combination additional hardware units for the most computationally costly functions with software for simpler arithmetic and complex control procedures. Fully software-based solutions are also appearing for certain applications, in particular in the so-called Open Radio-Access Network (openRAN) ecosystem. The contributions of this thesis lie in methods for purely software-based acceleration and real-time control of low-latency fronthaul interfaces. Since 5G has stringent latency requirements and support for very high-speed data traffic, methods for scheduling baseband processing need to be tailored to the specifics of the air-interface. Specifically, we propose a functional decomposition of the 5G air interface which is amenable to multi-core software implementations targeting high-end servers exploiting single-instruction multiple-data (SIMD) acceleration. Moreover, we provide some avenues for multi-threaded processing through pipelining and the use of thread pools. We highlight the methods and their performance evaluation that have been exploited during the development of the OpenAirInterface 5G implementation
Gailliard, Grégory. „Vers une approche commune pour le logiciel et le matériel de spécification et d’implémentation des systèmes embarqués temps-réels distribués, basée sur les intergiciels et les composants orientés objet : Application aux modèles de composants Software Communications Architecture (SCA) et Lightweight Corba Component Model (LwCCM) pour les systèmes de radio logicielle“. Cergy-Pontoise, 2010. http://biblioweb.u-cergy.fr/theses/2010CERG0518.pdf.
Der volle Inhalt der QuelleThis thesis deals with the hardware application of the software concepts of middleware and software architecture based on components, containers and connectors within Field-Programmable Gate Arrays (FPGAs). The target application domain is Software Defined Radio (SDR) compliant with the Software Communications Architecture (SCA). With the SCA, software radio applications are broken into functional waveform components to be deployed on heterogeneous and distributed hardware/software radio platforms. These components provide and require abstract software interfaces described using operation signatures in the Unified Modeling Language (UML) and/or the Interface Definition Language (IDL) of the Common Object Request Broker Architecture (Corba) middleware, both standardized by an international software industry consortium called Object Management Group (OMG). The portability and reusability needs of these business components require that their abstract interfaces defined at a system level are independent of a software or hardware implementation and can be indifferently translated into a software programming language like C/C++, a system language like SystemC at transaction level (Transaction Level Modeling - TLM), or a hardware description language like VHDL or SystemC at Register Transfer Level (RTL). The interoperability need of SDR components requires transparent communications regardless of their hardware/software implementation and their distribution. These first needs were addressed by formalizing mapping rules between abstract components in OMG IDL3 or UML2, signalbased hardware components described in VHDL or SystemC RTL, and system components in SystemC TLM. The second requirement was addressed by prototyping a hardware middleware using transparently memory mapping and two message protocols: Corba General Inter-Object Request Broker Protocol (GIOP) and SCA Modem Hardware Abstraction Layer (MHAL)
Omar, Tariq Ali. „Une architecture mixte logicielle et matérielle pour le contrôle intelligent en temps réel“. Grenoble INPG, 2006. http://www.theses.fr/2006INPG0089.
Der volle Inhalt der QuelleAutonomous intelligent control system for a dynamic and dangerous environment necessitates the capacity to identify the failure threats and to plan the real-time responses that ensure safety and goal achievement by the autonomous system. We propose a real-time intelligent control architecture called ORICA. It consists of an AI reasoning subsystem and a real-time response execution subsystem. The AI reasoning subsystem models the temporal and logical characteristics of the environment and plans the system responses. The real-time subsystem, which is composed of a software section and a hardware section, executes these responses to avoid failure of the autonomous system. Its performance behavior is unparalleled by the previous classical approaches (pure hardware or pure software). The software section uses behavior switching according to the frequency of external events and a unique reconfigurable intelligence behavior has been implemented in hardware section, using a reprogrammable chip (FPGA)
Vettor, Patrick de. „Une architecture logicielle à objets pour la conception d'applications industrielles complexes“. Besançon, 1991. http://www.theses.fr/1991BESA2005.
Der volle Inhalt der QuelleWang, Wenhao. „Processus de détermination d'architecture logicielle optimale pour processeurs Multicœurs pour le milieu automobile“. Thesis, Cergy-Pontoise, 2017. http://www.theses.fr/2017CERG0867/document.
Der volle Inhalt der QuelleThe recent migration from single-core to multi-core platforms in the automotive domain reveals great challenges for the legacy embedded software design flow. First of all, software designers need new methods to fill the gap between applications description and tasks deployment. Secondly, the use of multiple cores has also to remain compatible with real-time and safety design constraints. Finally, developers need tools to assist them in the new steps of the design process. Face to these issues, we proposed a method integrated in the AUTOSAR (AUTomotive Open System ARchitecture) design flow for partitioning the automotive applications onto multi-core systems. The method proposes the partitions solution that contains allocation of application as well as scheduling policy simultaneously. The design space of the partitioning is explored automatically and the solutions are evaluated thanks to our proposed objective functions that consider certain criteria such as communication overhead and global jitters. For the scheduling part, we present a formalization of periodic dependencies adapted to this automotive framework and propose a scheduling algorithm taking into account this specificity. Our defined constraints from real-time aspect as well as functional aspect make sure the applicability of our method on the real life user case. We leaded experiments with a complex and real world control application onto a concrete multi-core platform
Denoual, Franck. „Développement d'une plate-forme logicielle orientée objet pour la décompression et l'édition vidéo sur noyau temps-réel“. Rennes 1, 2001. http://www.theses.fr/2001REN10107.
Der volle Inhalt der QuelleKhenfri, Fouad. „Optimisation holistique pour la configuration d’une architecture logicielle embarquée : application au standard AUTOSAR“. Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4002/document.
Der volle Inhalt der QuelleAUTOSAR (AUTomotive Open System ARchitecture) has been created by automotive manufacturers, suppliers and tools developers in order to establish an open industry standard for automotive E/E(Electrical/Electronic) architectures. AUTOSAR provides a set of concepts and defines a common methodology to develop automotive software platforms. The key features of this standard are modularity and configurability of automotive software; this allows functional reuse of software modules provided by different suppliers and guarantees interoperability of these modules through standardized interfaces. However, the development of an embedded application according to AUTOSAR necessitates configuring a lot of parameters related to the large number of Software Components (SWCs), their allocations to the hardware platform and then, the configurationof each Electronic Control Unit (ECU). Different alternatives are possible during the design of such systems. Each implementation decision may impact system performance and needs therefore to be evaluated and compared against performance constraints and optimization goals. In this thesis, we introduce a holistic optimization approach to synthesizearchitecture E/E of an embedded AUTOSAR system. This approach is based on heuristic and metaheuristic methods. The metaheuristics (e.g. genetic algorithm) has the role to find the most satisfactory allocations of SWCs to ECUs. Each allocation step, two heuristics are developed to solve the problem of the ECU configuration (the number of tasks and priorities, allocation of runnables to tasks, etc.) and networks configuration (the number of messagesand priorities, allocation of data-elements to messages, etc.). In order to evaluate the performance of each allocation, we propose a new analysis method to calculate the response time of tasks, runnables, and end-to-end paths. The architectural exploration approach proposed by this thesis considers the model for periodic applications and is evaluated using generic and industrial applications
Abed, Hajer. „Interface électronique et logicielle pour la surveillance de la respiration en temps réel en utilisant des vêtements intelligents sans fils“. Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/68400.
Der volle Inhalt der QuelleIn this thesis, we present a new architecture of a smart T-shirt to monitor breathing in real time. This smart garment has an architecture that offers an innovative detection method ensuring continuous monitoring of respiratory activity. First the T-shirt detects deformation of the upper chest during breathing using an antenna built into the T-shirt. The antenna was designed in the laboratories of the optics, photonics and laser center of Laval University. A Bluetooth sensor integrated in the same T-shirt subsequently detects the variation of the RSSI signal (indicator of received signal strength) and sends it to a wireless data processing and analysis unit (a computer or tablet). A data analysis interface has been created to allow determination of the respiratory rate and characterization according to the received breathing signal. In addition, the smart T-shirt is powered by a wireless, hybrid power source powered by a rechargeable battery or by an inductive link. Two versions of the T-shirt were tested. The first contains a single sensor while the second has six sensors positioned on the front of the garment. In addition, different parameters were taken into account during the tests, citing among others the morphology, age and sex of the users. Tests have demonstrated successful detection of several relevant information such as breathing cycles (inspiration, expiration),respiratory rate and other statistical measures for diagnosis.
Giraud, Olivier André Louis. „Architecture logicielle haute performance pour la simulation temps réel synchrone d'objets physiques multisensoriels : retour d'effort, synthèse de sons, synthèse d'images“. Grenoble INPG, 1999. http://www.theses.fr/1999INPG0078.
Der volle Inhalt der QuelleLoiret, Frédéric. „Tinap : Modèle et infrastructure d'exécution orienté composant pour applications multi-tâches à contraintes temps réel souples et embarquées“. Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2008. http://tel.archives-ouvertes.fr/tel-00321745.
Der volle Inhalt der QuelleNous définissons un modèle de composant reposant sur plusieurs vues : une vue structurelle, placée au centre du cycle de conception, reposant initialement sur le modèle Fractal, une vue dynamique permettant au concepteur, dans une démarche descriptive, de personnaliser l'architecture métier pour définir les aspects de son applicatif liés à la concurrence, et enfin une vue implantation et une vue comportement fournissant respectivement une abstraction de l'implantation interne des composants et de leur comportement à l'égard de leur environnement. De plus, notre proposition est intégrée à un cadre méthodologique dirigé par les modèles.
Nous avons également expérimenté le paradigme composant à différents niveaux d'abstraction : pour l'applicatif et pour celui de l'infrastructure d'exécution qui les implante. Enfin, au niveau du système d'exploitation fournissant les services élémentaires nécessaires. Cette démarche est motivée par la volonté d'exploiter notre modèle multi-vues canonique et de l'adapter en fonction des besoins de chaque niveau d'abstraction. Cette expérimentation est menée avec Think, une implantation en C des spécifications Fractal.
Nous expérimentons Tinap par deux cas d'étude que nous avons prototypés. En premier lieu, pour concevoir une application d'analyse et de contrôle de flux multimédias par l'intermédiaire de disques vinyles. En second lieu pour expérimenter la mise en oeuvre du modèle d'exécution Accord (une méthodologie de conception pour applications temps-réel).
Deng, Sihao. „Programmation robotique hors-ligne et contrôle en temps réel des trajectoires : développement d’une extension logicielle de "Robotstudio" pour la projection thermique“. Besançon, 2006. http://www.theses.fr/2006BESA2035.
Der volle Inhalt der QuelleThe aim of this study was to improve robot trajectories control during the thermal spraying process on complex geometric objects. Many researches have been done to support this project. A commercial software (RobotStudio™) has been installed and the robot off-line programming has been tested and achieved. A toolkit dedicated to thermal spray called “Thermal Toolkit Spray” was developed on the platform “RobotStudio™”. This toolkit consists of three modules (“PathKit”, “MonitorKit”, “ProfileKit”) which respectively provide the generation of the robot trajectory, the real-time monitoring of the robot and the analysis of the profile of the deposit. Initially, the principles of the add-in program for RobotStudio™ were studied and the structure of the software was established. Then, the methods and communication protocols were analyzed and tested for the connection with the robot. Several experiments were carried out to test the software functions and its stability. The results show that this development can perfectly be used to create, optimize and monitor the robot program in the whole process of thermal spraying
Sayadi, Fatma Ezzahra. „Conception d'un composant virtuel pour le codage audio“. Lorient, 2006. http://www.theses.fr/2006LORIS069.
Der volle Inhalt der QuelleConsidering the expansion of digital communication systems, voice decoding benefited from a great number of studies. Important reductions of flow can thus be obtained by effective algorithms of compression, which take account of the natural redundancies of the word. Most known of these parametric coders is the CELP coder (Code-Excited Linear Prediction) commonly applied for encoding speech signals at 6 to 16 kbits/s. Considering the increasing complexity of these applications, the tools and methodologies of traditional design and verification appear unsuited to the realization of the embedded systems within reasonable times. The new approaches considered are based on system level description , co-design techniques and reuse IP cores. These techniques have to cope with heavy constraints like real time performances and cost. We propose in this thesis to establish an architecture dedicated to the speech processing, for which the critical parts with regard to the constraint real time will be integrated as hardware virtual components, while the other parts of the system will be treated in a software way
Desdouits, Chloé. „Réduction des pics de consommation d’électricité et problèmes d’optimisation induits pour les consommateurs“. Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT014/document.
Der volle Inhalt der QuelleWhile concerns about global warming have never been so important, one of its first causes: global electricity consumption, is still growing. One way to stem the phenomenon could be to better balance demand and production, in order to switch on less big production groups and to allow the integration of more renewable production sources. The new paradigm of electricity market incites customers to reduce their electricity consumption peak and to shift their consumption when the demand is lower, by introducing economical incentives. Thus, new optimization algorithms and methodologies are needed at the customers side to optimize power usage over time. Schneider Electric proposes, through the Arrowhead European project, to study three application use-cases: an elevator with multiple electricity sources, a manufac- turing plant, and a drinking water network. For each of these use-cases, a methodology to optimize power consumption peaks (sometimes through an electricity cost function) is given, as well as optimization algorithms. For the multisource elevator case, two coupled controllers are proposed: one at the strategic level solving a linear problem, the other one rule-based at the tactical level. For the manufacturing plant, the methodology we used to monitor, build energy models, and finally optimize is explained. Furthermore, three linear formulations are given, as well as a simple local search procedure and a naive constraint satisfaction formulation to handle the NP-hard scheduling problem. For the water network use-case, a quadratically constrained formulation is used to compare optimized pumping plans with the Business As Usual tactic. The methods proposed bring between 1.5% to 114% savings on the energy bill, depending on the context. Moreover, they allow electricity consumers to participate in the demand-response market. Finally, the knowledge extracted from our three use-cases is summarized, and guide- lines are given to optimize the electricity bill of any electricity consumer system
Deantoni, Julien. „SAIA: Un style architectural pour assurer l'indépendance vis-à-vis d'entrées / sorties soumises à des contraintes temporelles“. Phd thesis, INSA de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00239261.
Der volle Inhalt der QuellePour répondre à cet objectif, l'idée de SAIA est de séparer clairement le modèle de plateforme du modèle de l'application. À cette fin, SAIA propose l'introduction d'une plateforme de communication abstraite avec le processus. Cette plateforme abstraite est composée d'entrées et de sorties utiles pour effectuer le contrôle, mais indépendantes d'une technologie de capteurs/actionneurs particulière. L'application est développée en se basant sur les services fournis par la plateforme abstraite.%Une application temps réel ne peut pas être validée en ne considérant que ses aspects fonctionnels.
La stabilité d'une application de contrôle et sa qualité de contrôle sont, entre autres, dépendantes des caractéristiques temporelles de la plateforme abstraite. Cette dernière est donc composée d'un ensemble de services ainsi que d'une description de ses caractéristiques temporelles (notées QoS pour Quality of Service). La description de la QoS de la plateforme abstraite reflète le comportement temporel, sous forme de omega-expression régulière de la plateforme abstraite pour laquelle l'application a le comportement souhaité. Ainsi, nous avons d'un côté un modèle de la plateforme abstraite et de la QoS permettant la correction de l'application et de l'autre un modèle de la plateforme réelle dont la QoS a été analysée. Afin de connecter la plateforme abstraite à la plateforme réelle, SAIA s'appuie sur un connecteur complexe. Ce connecteur complexe est un assemblage de composants, décrit formellement par des automates temporisés réalisant des services de formatage, d'interprétation, de fusion de données et enfin d'adaptation de la QoS.
Le connecteur complexe possède un comportement et modifie donc la QoS de la plateforme réelle. Afin d'évaluer l'impact du connecteur complexe sur la QoS de la plateforme réelle, une analyse formelle basée sur la simulation exhaustive du connecteur complexe est réalisée. Il est alors nécessaire de s'assurer que cette QoS nouvellement évaluée satisfait la QoS de la plateforme abstraite et permet ainsi la réalisation d'un système correct. La vérification de cette satisfaction est basée sur l'établissement d'un contrat de QoS. Dans SAIA, l'établissement d'un contrat de QoS est basé sur une relation de satisfaction (équivalence de trace) entre systèmes à transitions étiquetés. Enfin, SAIA a été mis en oeuvre à plusieurs reprises dont, lors de deux concours d'implémentation de robots d'exploration terrestre dans le cadre de workshop satellites de RTSS (Real Time System Symposium).