Literatura académica sobre el tema "Réseau corporels sans fil"
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Artículos de revistas sobre el tema "Réseau corporels sans fil"
Wallstein, René. "Les télécommunications sans fil en quête d'un nouvel élan". Études juillet-août, n.º 7 (19 de junio de 2014): 19–28. http://dx.doi.org/10.3917/etu.4207.0019.
Texto completoHabib, Gilbert, P. Marangé, Jean-François Pétin y Thierry Divoux. "Evaluation de l'influence d'un réseau de communication sans fil sur la commande d'un SED". Journal Européen des Systèmes Automatisés 43, n.º 7-9 (10 de noviembre de 2009): 855–70. http://dx.doi.org/10.3166/jesa.43.855-870.
Texto completovan den Bossche, Adrien, Thierry Val y Eric Campo. "Un réseau sans fil adapté à la robotique mobile coopérante basé sur IEEE 802.15.4/ZigBee". Journal Européen des Systèmes Automatisés 44, n.º 1 (30 de enero de 2010): 67–100. http://dx.doi.org/10.3166/jesa.44.67-100.
Texto completoBarale, Elisabetta. "Le motif de l’araignée dans le conte de l’Infanticide". Reinardus / Yearbook of the International Reynard Society 34 (31 de diciembre de 2022): 1–18. http://dx.doi.org/10.1075/rein.00056.bar.
Texto completoBon, Bruno. "Histoire et perspectives du Novum Glossarium Mediae Latinitatis. Un « Nouveau Du Cange »". Archivum Latinitatis Medii Aevi 73, n.º 1 (2015): 297–308. http://dx.doi.org/10.3406/alma.2015.1178.
Texto completoSpittler, Juliette y Alain Mercuel. "Équipes Mobiles Psychiatrie-Précarité : entre antenne avancée et voiture-balai du Secteur psychiatrique ?" Perspectives Psy 61, n.º 4 (octubre de 2022): 346–52. http://dx.doi.org/10.1051/ppsy/2022614346.
Texto completoSAHUGUÈDE, Stéphanie, Alassane KABA, Anne JULIEN-VERGONJANNE y Sébastien REYNAUD. "Suivi de paramètres physiologiques en activité sans ondes radio". Trayectorias Humanas Trascontinentales, n.º 11 (4 de noviembre de 2021). http://dx.doi.org/10.25965/trahs.3905.
Texto completoGUÉRIN LASSOUS, Isabelle. "Évolution du standard pour réseau sans fil : IEEE 802.11". Réseaux Télécommunications, octubre de 2009. http://dx.doi.org/10.51257/a-v1-te7376.
Texto completoMiddleton, Catherine y Barbara Crow. "Building Wi-Fi Networks for Communities: Three Canadian Cases". Canadian Journal of Communication 33, n.º 3 (19 de octubre de 2008). http://dx.doi.org/10.22230/cjc.2008v33n3a2110.
Texto completoBa, Mandicou, Olivier Flauzac, Ibrahima Niang y Florent Nolot. "Routage et agrégation de données dans les réseaux de capteurs sans fil structurés en clusters auto-stabilisants". Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées Volume 21 - 2015 - Special... (2 de noviembre de 2015). http://dx.doi.org/10.46298/arima.2001.
Texto completoTesis sobre el tema "Réseau corporels sans fil"
Chevalier, Ludovic. "Performances de l'optique sans fil pour les réseaux de capteurs corporels". Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0118/document.
Texto completoThis thesis deals with the performance of optical girelles communications for body area networks (BAN) as an alternative solution to the radiofrequency one, in the context of mobile healthcare monitoring. After presenting the main characteristics of a BAN using the radiofrequency technology, specifically in the UWB band, we explain the advantages of the optical wireless technology. Diffuse propagation based on infrared technology is then considered for BAN, exploiting optical reflections from environment surfaces. Several optical wireless channel modeling methods are introduced, and we consider two solutions for the link between two on-body nodes: a classical method named “one reflection model”, used to estimate performance variations, and a ray-launching method, used to take into account a great amount of optical reflections. Considering several scenarios, we determine the outage probability, and show that the diffuse optical wireless technology is able to achieve an on-body link, with the data rates and the quality of service required by health monitoring applications, for a transmitted power far lower than the limit defined in standards. Then, we evaluate the theoretical performance, in terms of error probability, of an optical wireless BAN, considering the optical code division multiple access technique. Finally, we show that a BAN using optical wireless technology is theoretically feasible, regarding a health monitoring application, and considering the mobility of the patient in indoor environment
Hamie, Jihad. "Contributions pour la localisation basée sur les réseaux corporels sans fil". Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00920213.
Texto completoHamie, Jhad. "Contributions pour la localisation basée sur les réseaux corporels sans fil". Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00942019.
Texto completoLeduc, Caroles. "Réseaux corporels sans fil en ondes millimétriques : antenne, propagation et interaction avec le corps". Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S084/document.
Texto completoThe 60-GHz frequency band has been identified recently as attractive for body centric wireless communication development. Indeed, this band has several key advantages compared to lower frequency bands as high data rates above 7 Gbit/s, low risks of interference with neighboring wireless networks and compact devices. With the development of the future 5th generation of mobile networks in the millimeter-wave band, the number of BAN applications at 60 GHz should increase. To avoid health effects and protect user against an electromagnetic exposure of BAN devices at 60 GHz, the reduction of the coupling between human body and antennas, as well as the evaluation and quantification of exposure are main research aspect of the thesis. The main thesis contributions are divided in three parts: a quantification of antenna design effects on the interactions between human body and antennas; a study of tools and methods used to assess thermal effects due to 60 GHz exposure on a skin-equivalent phantom; and a new dosimetric and thermal approach to evaluate interaction between human body and BAN antennas at 60 GHz
Van, Roy Stéphane. "Modélisation spatio-temporelle ultra-large bande du canal de transmission pour réseaux corporels sans fil". Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210003.
Texto completoL’objectif de cette Thèse vise la réduction de la consommation énergétique au niveau des senseurs de sorte à leur garantir une autonomie de quelques mois, voire de quelques années. En réponse à cette contrainte énergétique, une association innovante de deux technologies émergentes est proposée, à savoir une combinaison des transmissions à ultra-large bande aux systèmes à multiples antennes. Une nouvelle architecture pour les réseaux corporels sans fil est donc envisagée pour laquelle les performances doivent être évaluées. Notre principale contribution à cet objectif consiste en la proposition d'une modélisation spatio-temporelle complète du canal de transmission dans le cadre de senseurs répartis autour du corps. Cette modélisation fait appel à la définition de nouveaux modèles, l'élaboration d'outils spécifiques d'extraction de paramètres et une compréhension fine des mécanismes de propagation liés à la proximité du corps humain. Ce manuscrit présente les résultats majeurs de nos recherches en cette matière.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
El, Mahboubi Firdaous. "Stockage adaptatif pour noeud de capteur sans fil autonome et sans batterie". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30218/document.
Texto completoEnergy autonomy is a major challenge in the massive deployment of wireless sensor networks in numerous applications. Energy harvesting and storage can serve as solutions to the autonomy issues. However, the harsh environment of certain applications requires a long lifetime since the use of batteries for storage is prohibited. We then resort to storage on ultra-capacitors. This type of storage has disadvantages that require a compromise between 3 factors: the fast charge of ultra-capacitors (low capacity), the maximum energy storage (strong capacity), and the maximization of stored energy utilization (low residual voltage). To meet these seemingly contradictory criteria, we propose three self-adaptive storage architectures. The first consists of a matrix of four identical ultra-capacitors, interconnected by switches, whose equivalent capacity adapts to the stored energy. The second and third architectures consist of two ultra-capacitors, one of low capacity and the other of large capacity, the difference between the two architectures being related to the number and type of switches used. The self-adaptive storage architectures that we propose include a suitable self-powered control circuitry to vary the apparent capacity of the device. In addition, each architecture allows a cold start with completely empty ultra-capacitors. These three architectures were first optimized through simulation, and then validated experimentally with discrete components. Finally, we implemented the self-adaptive storage architecture with two ultra-capacitors in a completely wireless measurement system, using an energy harvesting source and its associated electronics for its power supply, and demonstrated the relevance of this approach of reconfigurable storage. In conclusion, we deduce that the topologies can reach an efficiency of energy usage of up to 94.7% by employing discrete components, a value that could be further improved through the exploitation of a silicon integrated version for both the control circuitry and the ultra-capacitors
Chahat, Nacer. "Antenne, propagation et interaction avec le corps pour les applications de type réseaux corporels sans fil en micro-ondes et en millimétrique". Rennes 1, 2012. http://www.theses.fr/2012REN1S079.
Texto completoRecent progress in miniaturization of communicating devices and design of smart networks has triggered increased interest to body area networks (BAN) having a very strong potential for near future applications including military, personal healthcare, sport, space, entertainment, smart home, etc. This increasing attention to BAN and PAN (Personal Area Networks) applications has led to the development of textile sensors that can be easily integrated into clothes and to the buildup of high-data-rate wireless devices. The PhD thesis project has two main objectives. First, several microwave textile antennas have been optimized and fabricated to evaluate the interaction with the human body. The impact of the human body on the antenna performance is of great importance since it can directly impact the efficiency of on-body devices and global performances of the system. The power absorption in the body was also studied using realistic body models with different morphologies. Second, the unlicensed 57-64 GHz band have been studied in the wireless BAN context since it provides several advantages compared to microwave BAN. In particular, very high data rates can be reached (up to 5 Gb/s) whilst providing high level of security and low interference with adjacent networks. Besides, the on-body devices are much smaller at millimeter waves compared to those operating at microwaves
Youssef, Badre. "Approches statistiques pour les communications centrées sur l'utilisateur". Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT049.
Texto completoWireless Body Area Networks (WBANs) have been studied for over twenty years. This type of communication is based on radio links between several terminals close to the human body. There are 3 main types of link, depending on antenna positioning (i.e. in-on, on-on and on-off). Their specific features are, on the one hand, the impact of the human body on the propagation channel - a powerful electromagnetic disturbance that causes significant attenuation and particular propagation mechanisms - and, on the other hand, the number of sources of variability, which is very high: the subject, the nature of the radio link, the antennas, the frequency and the nearby environment. All this explains the complexity of this type of channel and the difficulty of modeling it in a generic way.To the best of our knowledge, the work carried out to date has produced models based mostly on a rather classical distance approach, which has the advantage of a physical explanation, or a scenario-based approach, which provides an “applications” orientation. Some sources, such as the environment and morphology, are insufficiently studied from our point of view, both qualitatively and quantitatively, even though their influence is often significant and sometimes important depending on the radio link.The main aim of this thesis is therefore to propose parametric-statistical models for various observables (path loss and delay spread), for these sources of variability, taking into account a larger statistical sample than has been done to date in the context of scenario based approach (describing on-on links). This is how we set up a methodology combining the definition of an experimental design, a sufficient database derived from simulations and experimental measurements to provide reference data. The experimental approach quickly becomes unrealistic when the diversity of possible situations has to be considered, as combinatorics is explosive. It should be stressed that in publications based on measurements, the models obtained are specific to the environment under consideration, which is not the aim of our approach.For the environment, we have developed a simplified Ray Tracing code (considering only specular reflections, which are most often the dominant contribution for the environment) allowing the study of any empty parallelepiped environment and type of radio link. Knowing that rooms size has an influence, our objective is to determine whether quantitatively this effect is significant or of 2nd order, and possibly under what conditions. The environments are “categorized” and their input parameters (dimensions and wall characteristics) are filled in an experimental design “constructed” from information in the specialized literature. The Latin hypercube method, considered simple and more efficient than the Monte Carlo method, was used to sample the stochastic space. Any dependencies between input variables are dealt with using copulas.For morphological variability, we also adopted a simulation approach using CST Studio Suite®. We made the simplifying assumption of considering homogeneous phantoms. This “reasonable” approach makes it “easy” to obtain significant anthropometric variability from image synthesis software. Subject variability was considered by means of two anthropometric criteria: Body Mass Index and Waist Circumference, using representative data and statistical studies.For these two variabilities and the observables studied, the fit of the parametric-statistical models obtained by multilinear regression was satisfactory to very satisfactory, depending on the radio link considered. They are of moderate complexity and defined by a limited number of parameters
Triki, Imen. "Rôle du vidéo streaming mobile qui dépend du contexte dans l'amélioration de la qualité d'expérience". Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0227/document.
Texto completoThe strong emergence of smartphones on human daily life as well as the highbroadband access supplied by operators have triggered pervasive demand on videostreaming mobile services, requiring the exploration of novel approaches on videocontent delivery. To afford video streaming services at sustainable quality, the idea of adjusting the streaming to the time-varying users’ contexts has been actively investigatedduring the recent years. Since the users’ perceptions on the video qualitydirectly impact their engagement in video streaming sessions, many interests havebeen accorded to the user’s Quality of Experience (QoE).Today streaming solutions mostly rely on the user’s contextual information suchas his link capacity or his available bandwidth to provide an acceptable final QoE.Such contextual information can be easily acquired thanks to the existence of wirelesssensors and dedicated smart applications on today mobile devices. At the core, liesthe idea of exploiting the strong correlation between users’ locations and contexts. Tothat end, radio maps with historical average signal strength have been geographicallymapped. Various studies on users’ mobility patterns also showed that people dailyroutes exhibit a high degree of spatial and temporal regularity, especially on publictransportation or on road ways to/from frequently visited places. Coupled with radiomaps, these mobility patterns can give high accuracy on context predictability alongusers’ trips.In this thesis, we analyse the impact of adapting video streaming to the user’scontext on the final QoE.We start by proposing CAMS (Context Aware Mode Switching),a context-aware resource allocation mechanism, for real (i.e, non adaptive) videostreaming delivery to reduce the number of video stalling. CAMS is designed to beapplied in a particular network topology under a particular mobility of users. Then,we explore the impact of knowing the future throughput variations on video quality adaptation and delivery cost in adaptive video streaming. We propose NEWCAST(aNticipating qoE With threshold sCheme And aScending biTrate levels) as a proactivealgorithm for cost adjustment and quality adaptation under the assumption of aperfect throughput estimation. We then extend the study to the case where throughputprediction errors may exist and propose a bench of adaptive algorithms inspiredfrom NEWCAST. To explore the feasibility of implementing these algorithms in realworld streaming, we conduct some experiments with the DASH-If Reference playerin an emulated environment. Finally, we explore the impact of knowing the futurethroughput variations when exploited with machine learning on the global QoE enhancementin adaptive video streaming. We propose a closed-loop framework basedon users’ feedbacks to progressively learn their QoE profiles and to fittingly optimizevideo deliveries. This framework is in particular suited for heterogenous populationswhere the QoE profiles of users are quite different and unknown in advance
Miry, Céline. "Schémas multigrilles pour la méthode des différences finies dans le domaine temporel(FDTD) : Application à la simulation de réseaux corporels sans fil (WBAN)". Rennes, INSA, 2010. http://www.theses.fr/2010ISAR0015.
Texto completoThis thesis aims at developing new Finite Difference Time Domain (FDTD) schemes for the fast and accurate simulation of Wireless Body Area Network problems. This emerging technology consists of several body sensors placed on or inside the body. The application range is wide. It concerns medical, entertainment and military domains. The FDTD is an efficient numerical technique for analysing waves propagation in complex environments such as the human body. However, it involves a uniform cubic grid, which leads to time consuming simulations. Two multigrid FDTD schemes are proposed in this thesis. They are based on the principle of dividing the general problem into independent FDTD sub-volumes which aim at characterising each element with an appropriate mesh. The electromagnetic information transfer is realised by the use of near-field and excitation surfaces. Thus, the proposed schemes are stable. These approaches are first validated using canonical examples. Then, they are applied to the simulation of complex and more realistic problems. The transmission between an implanted antenna and a simple dipole is firstly analysed. Several body postures and environment are considered. The WBAN on-body channel is then characterised by use of two antennas placed on the body surface. Finally, the specific absorption rate is calculated at 900 MHz in the fetal brain of a numerical pregnant woman model
Libros sobre el tema "Réseau corporels sans fil"
Wi-Fi. Paris: Micro application, 2004.
Buscar texto completoIndustrial communication systems. Boca Raton: Taylor & Francis, 2010.
Buscar texto completoMonter un réseau sans fil. CampusPress, 2003.
Buscar texto completoHameau, Chauvin. Wi-fi - maîtriser le réseau sans fil. ENI, 2003.
Buscar texto completoMontez votre réseau sans fil Wi-fi. Micro Application, 2003.
Buscar texto completo(Editor), Violet R. Syrotiuk y Edgar Chávez (Editor), eds. Ad-Hoc, Mobile, and Wireless Networks: 4th International Conference, ADHOC-NOW 2005, Cancun, Mexico, October 6-8, 2005, Proceedings (Lecture Notes in Computer Science). Springer, 2005.
Buscar texto completoSyrotiuk, Violet R. y Edgar Chávez. Ad-Hoc, Mobile, and Wireless Networks: 4th International Conference, ADHOC-NOW 2005, Cancun, Mexico, October 6-8, 2005, Proceedings. Springer London, Limited, 2005.
Buscar texto completoWilamowski, Bogdan M. y J. David Irwin. Industrial Communication Systems. Taylor & Francis Group, 2018.
Buscar texto completoWilamowski, Bogdan M. y J. David Irwin. Industrial Communication Systems. Taylor & Francis Group, 2018.
Buscar texto completoWilamowski, Bogdan M. y J. David Irwin. Industrial Communication Systems. Taylor & Francis Group, 2018.
Buscar texto completoCapítulos de libros sobre el tema "Réseau corporels sans fil"
LE GALL, Guillaume, Georgios Z. PAPADOPOULOS, Mohamed-Aymen CHALOUF y Nicolas MONTAVONT. "Vers une gestion intelligente de la qualité de service dans l’IoT : cas d’un réseau Low Rate WPAN". En La gestion et le contrôle intelligents des performances et de la sécurité dans l’IoT, 107–35. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9053.ch5.
Texto completoAYMEN CHALOUF, Mohamed, Hana MEJRI y Omessaad HAMDI. "Intelligence artificielle pour la sécurité en e-santé". En Gestion de la sécurité en e-santé, 213–35. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9179.ch9.
Texto completo