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Literatura académica sobre el tema "Logiciel temps réel pour la radio-logicielle"
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Artículos de revistas sobre el tema "Logiciel temps réel pour la radio-logicielle"
Tchidjo Moyo, Noël, Eric Nicollet, Frédéric Lafaye y Christophe Moy. "Concevoir pour l’ordonnancement temps réel. Prise en compte de l’ordonnancement temps réel durant la phase de conception d’une radio logicielle". Techniques et sciences informatiques 31, n.º 7 (30 de septiembre de 2012): 869–95. http://dx.doi.org/10.3166/tsi.31.869-895.
Texto completoIsmail, Ahmed Wael y Philippe Marin. "Faciliter l’interopérabilité à l’aide de flux de données directs, expérimentation d’une plateforme distribuée ouverte". SHS Web of Conferences 147 (2022): 01003. http://dx.doi.org/10.1051/shsconf/202214701003.
Texto completoTesis sobre el tema "Logiciel temps réel pour la radio-logicielle"
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.
Texto completoTchidjo, 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.
Texto completoThis 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.
Texto completoThe 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.
Texto completoThis 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.
Texto completoAutonomous 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.
Texto completoWang, 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.
Texto completoThe 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.
Texto completoKhenfri, Fouad. "Optimisation holistique pour la configuration d’une architecture logicielle embarquée : application au standard AUTOSAR". Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4002/document.
Texto completoAUTOSAR (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.
Texto completoIn 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.