Dissertations / Theses on the topic 'Réseaux avec qualité de service (QoS)'
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Mahdi, Mohamed. "Architectures réseaux pour le partage de contenus multimédias avec garantie de qualité de service." Phd thesis, Université Paul Sabatier - Toulouse III, 2011. http://tel.archives-ouvertes.fr/tel-00667635.
Full textNourizadeh, Shahram. "Un système de télésanté contextuel avec support de qualité de service pour le maintien à domicile." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL044N/document.
Full textThis thesis is a thesis CIFRE between LORIA and the MEDETIC Company and focuses on the design of telehomecare system for the elderly.In addition to the design of a remote surveillance architecture “Vill’Âge ®” based on networks of heterogeneous sensor (home automation, IEEE802.15.4/Zigbee, Wifi, Bluetooth), thesis has contributed essentially on the proposal of a clustering and routing protocol in the network of wireless sensors with an approach to fuzzy logic, and of a middleware for the collection and processing of data from sensors with the management of the quality of service as a special feature.A first platform was developed at Colmar (MEDETIC) and a second who is more complete is under development at LORIA (http://infositu.loria.fr/).By using this system, MEDeTIC, offers a new concept of smart homes for the senior citizens, named in French “Maisons Vill’Âge”. The first housing schemes are being built in 2 departments of France. A flat is entirely equipped to act as a demonstrator and as laboratory of research and development.The system is designed for the elderly who wish to spend their old age in their own home, because of its potential to increase independence and quality of life. This would not only benefit the elderly who want to live in their own home, but also the national health care system by cutting costs significantly. Based on this PhD thesis, MPIGate, a “Multiprotocol Interface and Gateway for for telecare, environment”, has been developed. MPIGate was awarded in the competition of the Ministry of Higher Education and Research and OSEO 2010
Rachdi, Mohamed Anouar. "Optimisation des ressources de réseaux hétérogènes avec coeur de réseau MPLS." Phd thesis, INSA de Toulouse, 2007. http://tel.archives-ouvertes.fr/tel-00146229.
Full textStoica, Alexandru. "Étude d'une architecture de commutateur ATM haut débit avec respect de la qualité de service." Paris 6, 2002. http://www.theses.fr/2002PA066344.
Full textMARTIN, Steven. "Maîtrise de la dimension temporelle de la qualité de service dans les réseaux." Phd thesis, Université Paris XII Val de Marne, 2004. http://tel.archives-ouvertes.fr/tel-00007638.
Full textShahram, Nourizadeh. "Un système de télésanté contextuel avec support de qualité de service pour le maintien à domicile." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2011. http://tel.archives-ouvertes.fr/tel-00645544.
Full textWei, Guozhi. "Optimisation du Handover dans le protocole IPv6 mobile avec la méthode E-HCF." Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00462081.
Full textBourquia, Nawal. "Optimisation du routage dans les réseaux internet avec qualité de service." Paris 9, 2003. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2003PA090023.
Full textIn most Internet routing protocols, traffic demands are routed on shortest paths according to a set of administrative weights. However, several shortest paths can co-exist between the origin and the destination of a demand. In this case, one of these shortest paths is arbitrarily chosen to route the demand or a load balancing is realized, and it becomes difficult for the administrator of the network to control the overall routing paths scheme or to manage the load balancing. Quality of service has also become necessary because of the explosion of Internet traffic these last years. This is the reason why we focused on the problem of unique shortest paths routing for which we determine a set of weights that ensures the unicity of the shortest paths while optimizing a quality of service criterion. We formulate this routing problem using linear programs with mixed integer variables and solve it with combinatorial optimization methods
Ould, Cheikh Sidi. "Routage avec qualité de service des réseaux Mesh IEEE 802. 11s." Versailles-St Quentin en Yvelines, 2013. http://www.theses.fr/2013VERS0039.
Full textThe quality of service (QoS) remains a major challenge to improve the performance of the mesh networks based on IEEE 802. 11s. It is in this context that the contributions are part of our thesis, which improves the routing and quality of service (QoS) in the WMN networks. In order to provide a solution to this challenge and to improve the quality of service of real-time traffic, we propose a new method based on the reservation of bandwidth, combined with the protocol HWMP (Hybrid Wireless Mesh Protocol). This new method is called BRWMN (Multi-hop Bandwidth Reservation in WMN) and defines a technical reservation of bandwidth and a new metric called WAM (Weighted Airtim Metric) for the HWMP protocol. MBRWMN aims to provide required bandwidth hop-by-hop for the real- time traffic and uses an admission control so as to carry this out. However, to reduce the end-to-end delay and increase the throughput, we propose a new metric based on the diversity of channels combined with the transmission delay of packets. This new routing metric named NMH (New Metric for HWMP protocol) is used by the HWMP protocol. The solution we propose aimes to provide a better route for calculating the value of the metric NMH implemented by the HWMP protocol. For the same purpose and to improve the mesh network performance, we propose the method ODCAM (On Demand Channel Assignment Method), which proposes a new mechanism for channel diversity based on a hybrid method of allocating channels. The metric MWCETT (Modified Weighted Cumulative Expected Transmission time) is implemented by the HWMP protocol. In order to decrease the time of end-to-end delay and increase the throughput, our method calculates the MWCETT metric value along the route between the source and the destination
Le, Grand Gwendal. "Qualité de service dans des environnements Internet mobile." Paris 6, 2001. http://www.theses.fr/2001PA066140.
Full textKsentini, Adlen. "Qualité de service (QoS) dans les réseaux locaux sans fil basés sur la technologie IEEE 802. 11." Cergy-Pontoise, 2005. http://biblioweb.u-cergy.fr/theses/05CERG0254.pdf.
Full textNext-generation Wireless Local Area Networks (WLAN) are involved to support a variety of services and traffic types. Among these services real-time applications, unlike Web and data transfert, requiere a strict Quality of Service (QoS) support such as: (i) low end-to-end delays; (ii) bandwidth guarantee and low drop rate. Since the IEEE 802. 11 standard fails to introduce differentiation between traffic classes, providing QoS in 802. 11-based network is very challenging. Indeed, both MAC layer and Physical layer designed by the IEEE 802. 11 standard support only best-effort transmission. Usually, the IEEE 802. 11 standard features the specifications for the two OSI's lower layers (MAC and Physical). The Medium Access Control (MAC) introduces two medium access protocols that are conceptly different: (i) Distributed Coordination Function (DCF) is a contention-based access mechanim executed independatly at each wireless station; (ii) Point Coordination Function (PCF) is a pooling-based mechanism that needs a central station to regulate the wireless traffic. The popularity of IEEE 802. 11 is mainly due to DCF, whereas PCF is barely implemented in today's products due to its complexity and inneficiently for the data transmission. Further, unlike DCF that can be deployed in every network configuration (ad-hoc and infrastructure), PCF is designed only for infrastructure-based configuration. By considering that MAC layer is the key element that provides QoS support in 802. 11-based wireless networks, our work through this thesis is to study and improve the legacy MAC layer and more especially the DCF access mechanism. Accordingly, we leverage the MAC's capability to support real-time's QoS requirements. The contributions of this thesis are organized onto two axes: •Improve the Backoff Binary Backoff (BEB) algorithm employed by DCF in two hostils environements: (i) when the newtwork operates with high collisions (high network load); (ii) when the network operates in noisy environements (high Bit Error Rate). •Study the concepts and the fesability of QoS in the 802. 11 MAC layer through the introduction of: (i) a new MAC protocol featuring QoS supports; (ii) a cross-layer architecture involoving the H. 264 encoder and the 802. 11e MAC layer aiming at ensure a robust video transport over WLAN
Djarallah, Nabil Bachir. "Network architectures for inter-carrier QoS-capable services." Rennes 1, 2011. http://www.theses.fr/2011REN1S099.
Full textLe challenge pour les opérateurs, aujourd’hui, réside dans la fourniture de services à valeur ajoutée à leurs utilisateurs mais aussi et surtout aux utilisateurs d'autres opérateurs. Ces services traversent plusieurs réseaux et exigent des garanties en termes de Qualité de Service (QoS). Pourtant, les protocoles actuels de routage inter-opérateur présentent encore des limitations en termes de garantie de QoS. La complexité de la mise en place de tels services inter-opérateurs à valeur ajoutée est due à des raisons techniques (par ex. Hétérogénéité des réseaux, passage à l’échelle, confidentialité de la topologie des réseaux de chaque opérateur, dimensionnement des ressources, etc. ), et économiques ou politiques (par ex. Partage des revenus, coopération inter-opérateur). Pour atténuer ces inquiétudes, nous suggérons la création d’alliances d’opérateurs prêts à coopérer. Bien que cela ne réponde pas totalement au challenge évoqué ci-dessus, ces alliances de confiance permettraient de relâcher ces contraintes. Pour accompagner cette démarche et permettre la mise en place de services à valeur ajoutée dépassant les frontières d’un seul opérateur, une réflexion autour des architectures des réseaux de nouvelle génération, des protocoles et des algorithmes associés est indispensable. Dans cette thèse nous présentons différentes architectures permettant le déploiement de tels services, ainsi que des solutions algorithmiques et protocolaires pour la négociation de contrats de services et la vérification de la disponibilité des ressources du réseau traversant plusieurs opérateurs. Nous démontrons que les performances de ces algorithmes sont compétitives par rapport à d’autres travaux
Benallouche, Yacine. "Gestion de la mobilité avec garantie de qualité de service dans un réseau interdomaine." Versailles-St Quentin en Yvelines, 2010. http://www.theses.fr/2010VERS0037.
Full textIn this thesis report we present our contributions. The first ensuring the mobility management in a single IP domain, while the second manages the interdomain mobility in a heterogeneous context. More specifically, in our first proposition we propose a multicast routing service which can be easily integrated into the basic IP router. In case of congestion of routers, we combine our multicast with a warning mechanism. This solution has interesting properties to reduce the network resources needed to complete a seamless handover and to regulate the traffic in the event of congestion using the alert mechanism. The second contribution is a heuristic approach to minimize the latency in the context of interdomain handover. This approach is decomposed into two algorithms. The first algorithm focuses on a specific search in the interdomain topology to collect all possible routes from any domain to another one in the topology. The second algorithm is used to select valid routes among those obtained by the first algorithm and it minimizes the overall delay variation. For both strategies intradomaine and interdomaine handover, the associated problem of mobility has been formulated as an optimization problem and a complexity study was achieved
Teyssié, Cédric. "Modélisation de réseaux à qualité de service avec UML et ses extensions." Toulouse 3, 2005. http://www.theses.fr/2005TOU30201.
Full textRoset, Hervé. "Contribution à l'étude de la qualité de service de bout en bout des réseaux." Paris 6, 2004. http://www.theses.fr/2004PA066594.
Full textSun, Donglai. "Exploring QoS and security in wireless ad-hoc network." Thesis, Dijon, 2012. http://www.theses.fr/2012DIJOS063/document.
Full textWireless Ad-hoc Network is an emerging communication technology over the last decade. As this kind of network can be easily implemented without requiring fixed infrastructures, it is considered as one of the most important solutions for building distributed wireless systems. Obviously, the physical channel in wireless ad-hoc network significantly distinguishes itself from the other existing networks. For example, fluctuations caused by unstable wireless channel are more severe. From an ordinaryperspective, these characteristics are treated as disadvantages, and have to be eliminated in network design.Burgeoning technology called physical layer security represents a completely subversive attitude to these issues. Unique physical channel is exploited to provide additional security guarantee. However, new problems are also introduced into the system. Transmission rate of links with physical layer security is largely restricted due to the overhead used for secure mechanism. Network performance (e.g., throughput and delay) is accordingly affected. Thus, QoS turns out to be a major concern innetworks with physical layer security. In this research, the focus is on the problem of how to guarantee QoS and physicallayer security simultaneously in wireless ad-hoc networks. Since traditional solutions for QoS are always implemented in upper layers of the network structure, they can hardly provide full support to the new secure physical layer. Furthermore, as services without secure requirement still exist in the network, the coexistence of secure and regular physical layer has to be taken into consideration. These issues have set new demands of corresponding MAC layer scheduling protocols. Therefore, we summarizethe general characteristics of physical layer security technology, based on which SecDCF, a MAC layer scheduling framework is presented. An interface is also designed to enable the integration of different scheduling policies. Furthermore, diversifiedrequirements from different scenarios are studied, and scheduling policies are then derived to be applied with SecDCF.Corresponding numerical analysis and simulations are also carried out to evaluate our research. As a conclusion, it is illustrated in this dissertation that with elaborately designed MAC layer scheduling schemes, it is possible to exploit the rich physical layercharacteristics for achieving both security and QoS in wireless ad-hoc networks
Frikha, Ahmed. "On providing Qos and reliability for telecommunication networks : multi-domain Qos routing and multicast reliability." Rennes 1, 2012. http://www.theses.fr/2012REN1S067.
Full textIn this thesis, we study two major problems of today’s telecom networks. First, we study the problem of providing Quality of Service (QoS) guarantees for IP-based services in multi-domain networks. Precisely, the Inter-Domain Multi-Constrained Path (ID-MCP) computation problem is deeply investigated in the first part of this thesis. Second, we study networks reliability, which is essential for many services, namely mission-critical services. Specifically, we address the problem of ensuring reliable multicast communications. Indeed, the consequences of a node or link failure are dramatic in this case of study as multiple destinations could be disconnected simultaneously. The objective of the first part is to find new schemes that enable solving the ID-MCP problem while respecting the operators policies, namely preserving the routing information confidentiality and the autonomy of the domains. We propose three new algorithms based on the Path Computation Element (PCE) framework, named respectively : ID-PPPA, ID-MEFPA and HID-MCP. The first two algorithms employ a pre-computation scheme that allows the computational time to be reduced while maintaining a good acceptance rate of the requests. The third algorithm is based on a hybrid computation scheme that takes advantages from the pre-computation and the on-demand computation. The HID-MCP employs crankback mechanisms to improve the global success rate. Performances of our proposed algorithms are accurately proven through both analytical studies and simulations. The objective of the second part is to find node and link protection structures suitable for multicast diffusion. As the restoration time is a crucial criteria in the recovery process, we address the reliability of multicast communications at the DWDM optical layer. A new generation of p-cycles adapted for multicast diffusion structures as well as the constraints imposed by all-optical networks, is proposed in this part. We also proposed three new algorithms for node and link failure recovery in dynamic multicast traffic, named respectively CCHN, NPCC and NPCC-SSC. The first algorithm uses a set of well-selected candidate p-cycles in order to reduce the computational time and achieve a significant bandwidth saving. Different approaches for selecting the candidate p-cycle sets are investigated. The second algorithm, NPCC, extends the node protection concept of p-cycles for multicast traffic. The third algorithm extends our NPCC algorithm to deal with the constraints imposed by all-optical networks, such as sparse light-splitting and wavelength continuity constraints. Simulation results prove the efficiency of our algorithms in terms of resource utilization, blocking probability and the computational time
Moussaoui, Omar. "Routage hiérarchique basé sur le clustering : garantie de QoS pour les applications multicast et réseaux de capteurs." Cergy-Pontoise, 2006. http://biblioweb.u-cergy.fr/theses/06CERG0300.pdf.
Full textAdvances in networks and computers have prompted the development of very vast and various fields of applications. This diversity leads the networks ta support various types of traffic and to provide services which must be at the same time generic and adaptive because properties of quality of service (QoS) differ from a type of application to another. For example, the multi-media and real-time applications require low end-ta-end delays, bandwidth guarantee and low drop rate, whereas prolonged network lifetime is the main requirement for many Wireless Sensor Networks (WSN) applications. However, these two types of applications are established against the problem of scalability. Accordingly, the hierarchical routing based on the clustering is an effective approach for solving this problem. Indeed, clustering-based approach allow to reduce the complexity of the routing on a large scale by the means of (i) the division of the network into differem clusters based on sorne criteria of QoS, and (ii) the management of the intra-cluster communications locally by the elected nodes as Cluster Heads (CHs). Since the requirements in QoS depend on the applications type, the clustering procedure must be adapted to fulfil the requiremems of each application type. Our work through this thesis is related ta the hierarchical routing protocol based on the clustering and its application in various environments to offer a good QoS to the multi-media real-time applications, and the WSN applications
Moad, Dalil. "Contribution à l'amélioration de la qualité de service dans les réseaux sans-fil multi-sauts." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015PA05S010.
Full textIEEE 802.11 based wireless networks are considered the cornerstone of autonomous communication systems. These networks allow users to communicate with each others via base stations deployed in specic locations through a set of dedicated communication protocols like Ad Hoc routing protocols. The IEEE 802.11 standard proposes specications for both physical and MAC layers of the OSI model. MAC layer denes dierent types of access to the wireless medium as explained below. The DCF (Distributed Coordination Function) mechanism, in which the access to the medium is executed localy in each station. The PCF (Point Coordination Function) method, unlike DCF mechanism the access the medium is managed by a central unit. The most widespread mechanism among them is the DCF mode as it does not require any infrastructure deployment. To improve the Quality of Service (QoS) oered to the dierent applications in multihop wireless networks, this thesis proposes original solutions to enhance the eciency of certain protocols in two dierent layers of OSI, i.e., routing and MAC layers. More specically, our proposed solutions enable higher eciency of OLSR protocol and ensure more ecient usage of the available bandwidth through the designed Padovan based medium access scheme operating in DCF mode. The routing approach used in OLSR is improved by applying the conict graphs to acquire more accurate estimation of the bandwidth shared with the adjacent nodes. At MAC layer, the number of collisions in dense networks is signicantly reduced by designing new backo scheme dubbed Padovan Backo Algorithm (BEB)
Zagrouba, Rachid. "Contrôle de la mobilité et de la QoS dans les réseaux cellulaires tout IP." Télécom Bretagne, 2007. http://www.theses.fr/2007TELB0051.
Full textThis study deals with QoS and mobility management in the wireless access networks. It is interested in the definition of wireless mobile IP networks both on the access network and the core network. The core network is supposed built on DiffServ and Mobile IP Protocol. We are thus focus mainly in the access network and in particular in the QoS signaling and handover management. The first part of this thesis consists in studying the basic concepts and proposals of QoS and mobility management in wireless IP networks. Then, we give an analysis and comparison of the main frameworks. Next, we define the new challenges for wireless operators and we address some important issues that arise when managing QoS within a wireless IP network. Lastly, we propose a new protocol to provide a set of scenarios and functions needed to couple QoS and mobility management. The proposed protocol, called QoS and Micro Mobility Management (Q3M), enables a network operator to use its network resources more efficiently, increase network performance and minimize signaling traffic. The implementation of Q3M protocol on the France Telecom R&D (Rennes) testbed, as well as the analytical and simulation results, show that Q3M protocol has a good performance in terms of delay establishment of QoS session and blocking probability. The performance of Q3M protocol is very reasonable compared to other related works. The Q3M advantage becomes more important when mobility is high and the network is congested
Makhlouf, Abderrahim. "Étude des mécanismes de l'équite de la qualité de service dans les réseaux Ad-Hoc." Paris 6, 2009. http://www.theses.fr/2009PA066744.
Full textVilla, Monteiro Daniel. "Stratégies d'alliances dans la satisfaction bout en bout de la QoS au sein d'un réseau inter-domaines hiérarchique et égoïste." Versailles-St Quentin en Yvelines, 2011. http://www.theses.fr/2011VERS0007.
Full textThis thesis focuses on satisfying the QoS end to end in a inter-domain hierarchical network and selfish. Routing protocols only offer a single road between two domains (direct route), whose composition is mainly influenced by economic interests. Our main contribution has consisted in proposing a new model based on the concept of alliance. In this model, an alliance is a set of independent areas of an economic perspective that decide to share part of their information network and a particular routing service (service stop). The goal of this alliance is to improve customer service requests among the members area by using alternative routes to better direct routes respecting QoS constraints. We establish a first-time mechanisms for the construction of these alternative routes and how to obtain the necessary estimates. Subsequently, our work focuses on studying the characteristics defining an effective alliance. We propose, then, different possible compositions of alliance based on local characteristics of areas but also on their topological position. To validate our model and study the effectiveness of alliances, we have conducted numerous simulations on realistic topologies and hierarchical. We find that the effectiveness of an alliance depends of course on its size, its composition but also the nature and difficulty of QoS constraints to satisfy
Meraihi, Rabah. "Gestion de la qualité de service et controle de topologie dans les réseaux ad hoc." Paris, ENST, 2005. http://www.theses.fr/2005ENST0003.
Full textWith the widespread development of multimedia services in mobiles networks, numerous researches on quality of service support in ad hoc networks have been proposed. Existent studies are often based on restricted hypotheses and limited constraints. In this thesis, we first propose a new routing protocol which performs terminal differentiation and uses a reliable network core that maximizes high quality wireless hops. We address then the need of a cross-layer QoS management in MANET using IEEE 802. 11 MAC protocol. The interaction between layers improves network performance, since it takes into account the different constraints in the variable ad hoc environment. An other aspect of the thesis treats of the topology control in mobiles ad hoc networks. Our contribution proposes to control the ad hoc network topology through the deployment of dedicated mobile routers depending on the mobile nodes’ locations. Thus, the network topology is hierarchical and based on a stable high quality mobile backbone formed by mobile routers having a long autonomy. This thesis was done as part of the ITEA Ambience project in which I contributed to the development of a platform, where mechanisms represented before are studied
Masri, Wassim. "Dérivation d'exigences de qualité de service dans les réseaux de capteurs sans fils basés sur TDMA." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/934/.
Full textThe tremendous advances in micro-technology and wireless communications has allowed a new generation of networks to emerge: Wireless Sensor Networks (WSN). While much effort is devoted to the development of several facets in WSN such as the energy issue, QoS support remains one of the least explored areas in this domain. In fact, many WSN-based applications could not function properly without QoS support by the underlying WSN. User level QoS requirements (such as data freshness or data resolution) should be mapped to network level QoS requirements (such as bandwidth, delay, or error rate) in order to perform the suitable reservations at the Network level and to check whether the user needs will be satisfied. This process of mapping QoS requirements from level to level is known as QoS mapping. This thesis focuses mainly on the QoS mapping process in TDMA-based WSN. We present how the density (a user level QoS requirement) coupled with a given network topology could be mapped to bandwidth and delay (network level QoS requirements)
Chammakhi, Msadaa Ikbal. "Gestion de la QoS et évaluation des performances des réseaux WiMAX dans les environnements fixes et à forte mobilité." Paris, ENST, 2010. http://www.theses.fr/2010ENST0038.
Full textDriven by the growing demand for high-speed broadband services, WiMAX technology has emerged as a competitive alternative to wireline broadband access solution. WiMAX technology, considered in this thesis, offers an IP-based framework that provides high data rates at medium and long range with the ability of supporting fixed, nomadic, portable, and mobile access. Moreover, based on the IEEE 802. 16 standard, the technology provides a set of built-in QoS mechanisms to support heterogeneous classes of traffic including data, voice and video. The 802. 16 standard, however, leaves open the resource management and scheduling mechanisms, which are crucial components to guarantee QoS performance for these services. In this thesis, we evaluate the performance of WiMAX systems in both fixed and highly mobile environments. More particularly, mobile WiMAX is investigated as a V2I communication medium since it is expected to play a major role in ITS. Moreover, after surveying, classifying and comparing different scheduling and admission control mechanisms proposed in this work-in-progress area, we propose two QoS solutions. Both solutions address PMP systems operating in TDD mode. The first solution includes a hierarchical scheduling algorithm that adapts the DL/UL allocations to serve unbalanced traffic. The amounts of these grants are set by the CAC module that adopts a Max-Min fairness approach. The second QoS solution presented in this thesis is a multi-Constraints Scheduling Strategy (mCoSS). In addition to data rate constraints, it supports delay constraints of real-time applications and handles bursty traffics. MCoSS is based on a modified dual-bucket traffic shaping mechanism
Basterrech, Sebastián. "Apprentissage avec les réseaux de neurones aléatoires et les machines de calcul avec réservoir de neurones." Rennes 1, 2012. http://www.theses.fr/2012REN1S178.
Full textSince the 1980s a new computational model merging concepts from neural networks and queuing theory was developed. The model was introduced under the name of Random Neural Networks (RNNs), inside the field of Neural Networks. In this thesis, a first contribution consists of an adaptation of quasi-Newton optimisation methods for training the RNN model. In the last decade, a new computational paradigm was introduced in the field of Machine Learning, under the name of Reservoir Computing (RC). One of the pioneers and most diffused RC methods is the Echo State Network (ESN) model. Here, we propose a method based on topographic maps to initialise the ESN procedure. Another contribution of the thesis is the introduction of a new RC model called the Echo State Queueing Network (ESQN), where we use ideas coming from RNNs for the design of the reservoir. An ESQN consists of an ESN where the reservoir has a new dynamics inspired by recurrent RNNs. In this thesis, we position the ESQN method in the global Machine Learning area, and provide examples of their use and performances. Finally, we propose a method for real–time estimation of Speech Quality using the learning tools above described. Audio quality in the Internet can be strongly affected by network conditions. As a consequence, many techniques to evaluate it have been developed. In particular, the ITU-T adopted in 2001 a technique called Perceptual Evaluation of Speech Quality (PESQ) to automatically measuring speech quality. PESQ is a well-known and widely used procedure, providing in general an accurate evaluation of perceptual quality by comparing the original and received voice sequences. The thesis provides a procedure for estimating PESQ output working only with measures taken on the network state and using some properties of the communication system, without any original signal. The experimental results obtained prove the capability of our approach to give good estimations of the speech quality in a real–time context
Paudel, Indira. "QoS provisioning in future wireless local area networks." Thesis, Evry, Institut national des télécommunications, 2015. http://www.theses.fr/2015TELE0004/document.
Full textWireless Local Area Networks (WLAN) are today the most popular access networking solution at homes and offices. Although initially, WLANs were designed to carry best effort traffic, users today are adopting them for various multimedia services and applications that have stringent QoS requirements. WLAN standards based on CSMA/CA technique are not able to provide QoS guarantees and furthermore lead to bad performances when the number of competing stations/flows increases. Moreover, standard QoS solutions rely on centralized approaches (e.g. PCF, HCCA) that are not widely used on terminals. The distributed approach, based on concurrent access remains fundamental in WLAN. In this thesis, we propose solutions to improve both QoS and QoE (Quality of Experience) of multimedia services over WLAN. The main contributions include proposal of an aggregation scheme that relies on QoS differentiation for different service classes. We then evaluated the QoE of video services over IEEE 802.11n networks for various radio, MAC and load conditions. Based on this study, a random neural network solution is then proposed to automate video QoE prediction from system parameters. Furthermore, an enhancement to the distributed access mechanism in IEEE 802.11 networks is also proposed. First, we proposed to select appropriate and specific Backoff values according to QoS requirements. Second, a new flow prioritization based on AIFSN (Arbitration Inter-Frame Space Number) values, allocated according to traffic load and traffic types is proposed. Through analysis, we showed that these solutions can enhance QoS and provide regular access, minimize collisions and provide better resource utilization
Bchini, Tarek. "Gestion de la Mobilité, de la Qualité de Service et Interconnexion de Réseaux Mobiles de Nouvelle Génération." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0016/document.
Full textWith the rapid evolution of mobile radio telecommunications and networks technologies, researchers are currently preparing the arrival of a new generation called 4G. The 4th generation network aims to improve spectral efficiency and increase capacity to manage a large number of mobiles in a cell. It tries to provide high flow rates under high or low mobility. It also aims to enable and facilitate the interconnection and the interoperability between different technologies allowing transparent transition between networks. Finally, it aims to avoid interruption of services during the handover, and to switch an all-IP system. In this context, we are concerned first with QoS and mobility issues in Mobile WiMAX for the real-time traffic. We compared the performance of several mobility protocols in the context of the level 2 and level 3+ handovers. Several mobility models, configurations and scenarios were considered. Finally, we modeled a decision algorithm that manages the handover in mobile WiMAX based on several input parameters.Through these studies, we have identified mobility protocols that provide an acceptable QoS level for real-time traffic under the proposed scenarios. Secondly, we focused on the problems of interconnection and interoperability between networks, taking into account the mobility and vertical handovers between two technologies. For this, we proposed to compare mobility protocols or combine them to reduce delays for real-time traffic during the handover. We also proposed interconnection models between mobile WiMAX and many other standards (802.11e, UMTS, DVB-S/RCS, LTE). Besides interconnection solutions, we also highlighted the combination or combinations of management mobility protocols that can guarantee QoS
Chahed, Tijani. "La qualité de service de bout en bout dans l'Internet : mapping de la QoS entre IP et ATM, services intégrés et services différenciés." Versailles-St Quentin en Yvelines, 2000. http://www.theses.fr/2000VERS003V.
Full textKambou, Samy Jacques André. "Transmission de multimédia dans les réseaux sans fil à qualité de service garantie." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2290/document.
Full textThis thesis focuses on the transmission strategies of the multimedia content in wireless networks. The advantage of a such strategy is its ability to manage the resources, according to the objectives of the targeted applications. We propose a transmission scheme, which guarantees the quality of service (QoS), depending on the channel state information and on the multimedia content specifications. We take advantage of the radio channel diversities (spatial, frequency, etc.). ln fact, the association of MIMO and OFDM techniques appears as effective solution to increase the system performance. For this reason, we propose a MIMO-OFDMA system, which considers cross-layer srtategies based on link adaptation schemes to dynamically adjust the system parameters. Firstly, we develop a PHY/APPL cross-layer strategy, dedicated to a single user of a MIMO-OFDMA system, which transmits an H.264/SVC video. The Iink adaptation scheme allows to define the optimum parameters, which minimize the end-ta-end video distortion by using an optimization algorithm under power and bit error rate constraints. To consider the realistic transmission aspects, we propose a PHY/MAC cross-layer strategy, dedicated to a multi-user, multi-service, MIMOOFDMA system. This scheme combines a scheduling policy with optimal parameterization to provide a satisfied troughput to a maximum number of users, acheiving the required services. Finally, the first two solutions are combined to determine the optimal parameters which minimize the end-ta-end distortion of the received video by user, and also acheive QoS requirements of the other services
Vatinlen, Bénédicte. "Optimisation du routage dans les réseaux de télécommunications avec prise en compte de la qualité de service." Paris 6, 2004. http://www.theses.fr/2004PA066328.
Full textReinhard, Vincent. "Méthodes d'introduction de QoS dans un réseau optique à capacité surmultipliée." Versailles-St Quentin en Yvelines, 2012. http://www.theses.fr/2012VERS0062.
Full textIn this thesis we investigate methods to increase the performance of a high-speed optical network (CARRIOCAS, 40 Gbps). By giving the users strict QoS guarantees on the one hand, and by minimizing the bandwidth used by multicasts on the other hand. We first propose a mechanism allowing a centralized control for the applications data insertion in the network. Our mechanism uses a buffer for each application using the network. Using buffers allows us to use queuing theory models in order to respect a maximum delay for sending data. In a second part of this thesis, we investigate new methods to satisfy multicast requests. Indeed, in the CARRIOCAS network, a fixed number of network nodes are able to duplicate data. This induces a new constraint on the construction of any mutlicast tree. We propose new methods to satisfy multicast demands while respecing this constraint, in order to minimize the bandwidth consumed
Boudour, Ghalem. "Bandwidth reservation in mobile ad hoc networks for providing QoS : adaptation for voice support." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1033/1/Boudour_Ghalem.pdf.
Full textQoS provisioning over Mobile Ad-Hoc Networks (MANETs) has attracted a great attention in recent years. While much research effort has been devoted to provide QoS over wired and cellular networks, QoS solutions for the support of real-time traffic over MANETs remains one of the most challenging and least explored areas. In fact, real-time applications such as voice and video could not function properly on MANETs without a QoS oriented medium access control (MAC) scheme. Indeed, real-time traffics claim strict requirements in terms of transmission delay and packet dropping that can be fulfilled only if the MAC sub-layer provides bounded channel access delay, and low collision rate. The purpose of this thesis is the proposal and analysis of an efficient reservation MAC protocol to provide QoS support over MANETs. Firstly, we study one major issue in resource reservation for MANETs which is reservation consistency. Our analysis of existing reservation MAC protocols for MANETs reveals that many reservation conflicts between neighbor nodes occur during the reservation establishment phase. These conflicts which are mainly due to collisions of reservation control messages, have an important impact on the performance of the reservation protocol, and lead to a significant collision and loss of packets during the life-time of the connection, which is not acceptable for real-time traffics. We design a new reservation MAC protocol that resolves these conflicts. The main principle of our protocol is to achieve better coordination between neighbor nodes in order to ensure consistency of reservations. Thus, before considering a reservation as successful, the protocol tries to ensure that each reservation control message transmitted by a node is successfully received by all its neighbors. In the second part of this thesis, we apply the proposed reservation protocol to voice traffic. .
Ammar, Doreid. "Plan de connaissance pour les réseaux sémantiques : application au contrôle d'admission." Phd thesis, Université Claude Bernard - Lyon I, 2012. http://tel.archives-ouvertes.fr/tel-00850153.
Full textSharrock, Rémi. "Gestion autonomique de performance, d'énergie et de qualité de service : Application aux réseaux filaires, réseaux de capteurs et grilles de calcul." Phd thesis, Toulouse, INPT, 2010. http://oatao.univ-toulouse.fr/11717/1/sharrock.pdf.
Full textEchabbi, Loubna. "Algorithmique pour l'allocation et la tarification des ressources dans les réseaux télécoms avec garanties de service." Versailles-St Quentin en Yvelines, 2005. http://www.theses.fr/2005VERS0031.
Full textThe emergent services based on real-time applications becomes more and more popular. The nature of these services requires efficient ressource management in order to satisfy their needs in term of quality of service. Furthermore, the quality of service has its price and then pricing should be used in order to give " the right services to the right requests ". Ln this context, a service provider should propose pricing schemes that include some incentives to efficcient usage of ressources. Our contribution in this field concern allocation and pricing problems to which a service provider is faced. We consider first a centralised approach in order to analyse the complexity of the global allocation problem in which requests are accepted according to their willingness to pay. We identify some partieular polynomial instances and give some resolution methods. Our results are based on some properties of unimodulary matrices. We then present our DiMA model that enables a distributed decision making about on-line requests admission. This decision is based on second price auctions and thus provides an economically efficient service differentiation. We analyse the complexity of this model and evaluate its efficiency trough simulation scenarios. The last part consists on a macroscopic vision of problems due to interconnection between different operators. We foeus on incentives that can influence the interdomain routing decisions. We present a model where each operater fixes its transit prices to its neighbours and foeus on partieular strategies that can be adopted by these opeators. The analyse of the impact of these strategies on the system stability shows the importance of the economic dimension on the interconnection service management
Brahmia, Mohamed El Amine. "Mécanismes de contrôle de la qualité de services dans les réseaux WiMAX relais." Thesis, Mulhouse, 2012. http://www.theses.fr/2012MULH4074.
Full textOver recent years, new applications steadily developed in a tremendous space, especially in audiovisual services area. The present applications have some of constraints to work properly. The developments of mechanism which enable to overcome these constraints become a critical issue in this area. The IEEE 802.16j standard is one of wireless communication technology which offering more resources to support new telecommunication services. In this thesis, we focus our research on the problem of quality of service (QoS) inWiMAX relay networks. Our contributions are classified as follows : we proposed a multicast routing protocol for IPTV services (such as HD-TV, SD-TV, Web-TV and Mobile-TV). This proposed protocol used a new multicast tree construction mechanism based-on prime numbers. We also developed a new aggregation method based on standard video compression called Scalable Video Coding (SVC). Our goal is to support user’s heterogeneity while optimizing resources consumption. In addition, we studied the problem of scheduling inWiMAX networks.We proposed an adaptive scheduling algorithm AWRR for IPTV services. The aim of this method is to support QoS constraints by using two schedulers, and assigning a dynamic value to each service queue. Finally, we interested to study about the problem of path selection. We proposed a solution based on a deterministic cost function. This function also ensures admission control based on two basic cost functions which include four QoS criteria. This thesis has been prepared in the MIPS/GRTC laboratory, University of Haute Alsace, under a research contract external (CRE) framework with France Telecom R&D. All proposed mechanisms were evaluated by the simulator QualNet, Matlab and mathematical analysis
Gaillard, Guillaume. "Opérer les réseaux de l'Internet des Objets à l'aide de contrats de qualité de service (Service Level Agreements)." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI152/document.
Full textWith the growing use of distributed wireless technologies for modern services, the deployments of dedicated radio infrastructures do not enable to ensure large-scale, low-cost and reliable communications. This PhD research work aims at enabling an operator to deploy a radio network infrastructure for several client applications, hence forming the Internet of Things (IoT). We evaluate the benefits earned by sharing an architecture among different traffic flows, in order to reduce the costs of deployment, obtaining a wide coverage through efficient use of the capacity on the network nodes. We thus need to ensure a differentiated Quality of Service (QoS) for the flows of each application. We propose to specify QoS contracts, namely Service Level Agreements (SLAs), in the context of the IoT. SLAs include specific Key Performance Indicators (KPIs), such as the transit time and the delivery ratio, concerning connected devices that are geographically distributed in the environment. The operator agrees with each client on the sources and amount of traffic for which the performance is guaranteed. Secondly, we describe the features needed to implement SLAs on the operated network, and we organize them into an SLA management architecture. We consider the admission of new flows, the analysis of current performance and the configuration of the operator's relays. Based on a robust, multi-hop technology, IEEE Std 802.15.4-2015 on TSCH mode, we provide two essential elements to implement the SLAs: a mechanism for the monitoring of the KPIs, and KAUSA, a resource allocation algorithm with multi-flow QoS constraints. The former uses existing data frames as a transport medium to reduce the overhead in terms of communication resources. We compare different piggybacking strategies to find a tradeoff between the performance and the efficiency of the monitoring. With the latter, KAUSA, we dedicate adjusted time-frequency resources for each message, hop by hop. KAUSA takes into account the interference, the reliability of radio links and the expected load to improve the distribution of allocated resources and prolong the network lifetime. We show the gains and the validity of our contributions with a simulation based on realistic traffic scenarios and requirements
Boudargham, Nadine. "Competent QoS-aware and energy efficient protocols for body sensor networks." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD007.
Full textBody Sensor Networks (BSNs) are formed of medical sensors that gather physiological and activity data from the human body and its environment, and send them wirelessly to a personal device like Personal Digital Assistant (PDA) or a smartphone that acts as a gateway to health care. Collaborative Body Sensor Networks (CBSNs) are collection of BSNs that move in a given area and collaborate, interact and exchange data between each other to identify group activity, and monitor the status of single and multiple persons.In both BSN and CBNS networks, sending data with the highest Quality of Service (QoS) and performance metrics is crucial since the data sent affects people’s life. For instance, the sensed physiological data should be sent reliably and with minimal delay to take appropriate actions before it is too late, and the energy consumption of nodes should be preserved as they have limited capacities and they are expected to serve for a long period of time. The QoS in BSNs and CBSNs largely depends on the choice of the Medium Access Control (MAC) protocols, the adopted routing schemes, and the efficient and accuracy of anomaly detection.The current MAC, routing and anomaly detection schemes proposed for BSNs and CBSNs in the literature present many limitations and open the door toward more research and propositions in these areas. Thus this thesis work focuses on three main axes. The first axe consists in studying and designing new and robust MAC algorithms able to address BSNs and CBSNs' challenges. Standard MAC protocols are compared in high traffic BSNs and a new MAC protocol is proposed for such environments; then an emergency aware MAC scheme is presented to address the dynamic traffic requirements of BSN in ensuring delivery of emergency data within strict delay requirements, and energy efficiency of nodes during regular observations; moreover, a traffic and mobility aware MAC scheme is proposed for CBSNs to address both traffic and mobility requirements for these networks.The second axe consists in proposing a thorough and efficient routing scheme suitable for BSNs and CBSNs. First, different routing models are compared for CBSNs and a new routing scheme is proposed in the aim of reducing the delay of data delivery, and increasing the network throughput and the energy efficiency of nodes. The proposed scheme is then adapted to BSN's requirements to become a solid solution for the challenges faced by this network. The third axe involves proposing an adaptive sampling approach that guarantees high accuracy in the detection of emergency cases, while ensuring at the same time high energy efficiency of the sensors.In the three axes, the performance of the proposed schemes is qualitatively compared to existing algorithms in the literature; then simulations are carried a posteriori with respect to different performance metrics and under different scenarios to assess their efficiency and ability to face BSNs and CBSNs' challenges.Simulation results demonstrate that the proposed MAC, routing and anomaly detection schemes outperform the existing algorithms, and present strong solutions that satisfy BSNs and CBSNs' requirements
Bennani, Fayçal. "IP et la QoS : vers une maîtrise dynamique de bout en bout." Paris, ENST, 2002. http://www.theses.fr/2002ENSTA002.
Full textSethom, Kaouthar. "Gestion de la mobilité dans les réseaux sans fil de nouvelle génération." Paris 6, 2006. http://www.theses.fr/2006PA066410.
Full textVan, Wambeke Nicolas. "Une approche pour la composition autonome de services de communication orientés QoS : Application aux protocoles de transport configurables." Phd thesis, INSA de Toulouse, 2009. http://tel.archives-ouvertes.fr/tel-00433046.
Full textAbboud, Khodor. "Conception et évaluation d'un modèle adaptatif pour la qualité de service dans les réseaux MPLS." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00590422.
Full textLiu, Jinshan. "Découverte de services sensible à la qualité de service dans les environnements de l'informatique diffuse." Phd thesis, Université de Versailles-Saint Quentin en Yvelines, 2006. http://tel.archives-ouvertes.fr/tel-00469433.
Full textDerbel, Ghorbel Hajer. "Proposition d'une approche de gestion autonome pour le support de la QoS et de la QoE dans les réseaux IP." Thesis, Evry-Val d'Essonne, 2008. http://www.theses.fr/2008EVRY0008.
Full textThe quality of services management in IP networks became a very complex and expensive operation from the operators. The actual management approaches are mentioned inefficient because they are mainly based on direct human intervention. It is clear that the response to this problem is to specify autonomic network management approach. This thesis contributes to the specification and the realisation of such approach. The first part of this thesis addresses the state of art of network management approaches. In the second part, we propose a QoE (Quality of Experience) measuring method and a CIM (Common Information Model) extension to model the concepts and the metrics of this method. In the third part, we propose an extension of the network equipment architecture towards more autonomic decision making. In the following parts, we propose an Autonomic NEtwork Management Architecture (ANEMA) based on Behavioral policies, Goal and Utility function. By exploiting several policy description forms described in different abstraction levels, ANEMA allows the IP network to achieve a certain autonomy level in quality of services management
Elloumi, Imène. "Gestion de la mobilité inter réseaux d'accès et de la qualité de service dans une approche NGN/IMS." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1852/.
Full textIn the new landscape of multi-service convergence of the NGN/IMS approach and considering the needs of the user of NGN, that is mobile in a very heterogeneous environment, we have proposed informational, architectural and organizational adaptations in order to monitor the inter network mobility of access and ensure the complete continuity of the QoS in such an environment. Indeed, we have noticed that the bases of the knowledge of the users' profiles lack decision-making information relative to a later analysis. Consequently, there is a need to raise the level of abstraction of the available information. Our first contribution is therefore informational. Decisional information are added to the HSS basis to enrich the knowledge base, which is expressed under the form of "profile of QoSd", where the new information inform directly the decisions to be taken according to the user's profile (preferences QoS and pricing, bandwidth, location. . . . ). Thus, this new knowledge basis will allow dynamic adaptations and will, therefore, make the IMS session more effective. We have, therefore, modeled QoS information relative to users' profiles and IMS offered services by using the CIM classes that we call "QoS Pattern of the IMS information". From the architectural point of view, we have simulated new components to intercept the useful lacking information to ensure the management of an IMS session in real time. Our second contribution consists in adding new components of constituent management IQMS: "Interworking QoS Management Subsystem", that collect the extracted information from the protocols at all levels in a mobile IMS session and will be able to manage the users' mobility (QoS handover and QoS interworking). Our third contribution is proposed organizational subsystem for QoS management in the multiple providers context when a user can to subscribe to one or several providers according to QoS criteria "Interworking QoS Management Subsystem multiple providers: IQMSmp"
Toufga, Soufian. "Vers des réseaux véhiculaires (VANET) programmables grâce à la technologie SDN (software defined network)." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30128.
Full textThe vehicular network concept, which initially focused on vehicle-to-vehicle communication, is opening up to other types of communications involving vehicles and infrastructure (network), cloud or pedestrians, etc. to meet the needs of the wide variety of new applications envisaged in the framework of the Intelligent Transportation System (ITS). The multitude of network access technologies, the very high mobility of vehicles and their high density in urban areas, and the predominance of wireless communications make it a heterogeneous network, with very dynamic characteristics, some of which are difficult to predict, and subject to scalability problems. Given these issues, one direction, considered by the scientific community, is to apply the SDN (Software Defined Network) paradigm to vehicular networks as a means of, on the one hand, enabling the hybridization and unification of control of different network access technologies and, on the other hand, taking advantage of the centralized view of the network and contextual data from the cloud to develop new control algorithms that can potentially rely on the prediction/estimation of the network state and thus anticipate certain control decisions. Therefore, this thesis is part of this framework. Its contributions aim at developing the concept of SDVN (Software Defined Vehicular Network). Four contributions are developed. The first one specifies the architecture of a hybrid SDN vehicular network capable of meeting the challenges described above. This architecture is complemented by an SDN controller placement solution. We propose a dynamic approach capable of adjusting the optimal placement of controllers according to network topology changes due to road traffic fluctuations. This work also covers the problem of global network vision that an SDN controller can build up, which is a prerequisite and the cornerstone of any network control function. To this problem, we propose amendments and extensions to the "de facto" topology discovery service designed for wired networks to adapt it to the vehicular context. As a complement to the discovery service, we also propose a topology estimation service based on Machine Learning techniques to provide network control functions with a potential vision of the future state of the network and thus open them to proactive and intelligent network control
Zaaraoui, Hind. "Gestion de ressources bout-en-bout et contrôle de la qualité de service en mobilité dans les réseaux LTE/LTE-Advanced." Thesis, Avignon, 2017. http://www.theses.fr/2017AVIG0220/document.
Full textThe technology evolution of Radio Access Network (RAN) in the context of 5th Generation (5G) is not only guided by improving the network performance but also by the need to transform all the technologies into intelligent dynamic ones. The new 5G is a flexible technology that will be able to satisfy at the same time each user of any type of mobility (static or mobile) or service request (real and non-real time service) without modifying any models or algorithms in networks. All physical use cases will be able to be considered by the network intelligently and resource managed automatically. The objective of this thesis is to analyse and enhance radio performance taking into account vehicular mobility by managing dynamically and intelligently the available resources. To this end, we describe different users mobility models for discrete and continuous modeling. The discrete model using the well-known car following model is well adapted for simulations. The continuous one is useful to derive analytical key performance indicators (KPI). The novelty of the thesis is the analytical formulation of KPIs that take into account the physical mobility in the radio traffic which is not necessary stationary. As an example, the impact of a traffic light on performance indicators in a cell is investigated. It is shown that a periodical physical traffic congestion due to the traffic light deteriorate periodically the cell performance. A first given solution is to improve resource allocation and control in the context of LTE-Advanced heterogeneous network. A small cell is deployed near the traffic light to relieve periodic congestion and QoS degradation. Three resource allocation and control schemes are investigated: a full frequency reuse, a static and a dynamic frequency splitting algorithm that are optimized with respect to a throughput based alpha-fair utility. For sake of financial and energy costs decreasing, another solution is provided using new antenna array technologies in order to manage efficiently heterogeneous, fixed and mobile traffic. A heterogeneous antenna system with different large antenna array technologies is considered to ooad static congestion areas and also the dynamical mobile congestion: Virtual Small Cell (VSC), virtual small cell with Self-Organizing Network (VSC-SON) and beamforming with multilevel global codebook that manages the heterogeneous antenna system at the Base Station (BS). The first two technologies improve the cell performance due to the capability to focus the signal at the traffic concentration. The novel beamforming solution with global codebook can further and significantly improve performance due to the capability to focus the signal along the road and to implicitly balance the traffic between the different antennas. We compare all these technologies and their impact on the network performance. The issue of user selection to allocate a portion (in time or in bandwidth) of the available resource is also analyzed. Moreover the context of resource management and network performance for 5G in high mobility is one of the future challenges. Thanks to the Minimization of Drive Testing (MDT) technology, networks can have Signal to Interference plus Noise Ratio (SINR) information with Geo-Localized Measurements (GLM).We introduce the concept of Forecast Scheduler for users in high mobility. It is assumed that a Radio Environment Map (REM) can provide interpolated SINR values along the user trajectories. Mobile users experience in their trajectories different mean SINR values. In mobile networks, schedulers exploit channel quality variation by giving the signal to the user experiencing best channel conditions while remaining fair. Nevertheless, we cannot record data rates of users with high mobility due to a very small time coherence. The Forecast Scheduling will exploit the SINR variation during users' trajectories
Nefzi, Bilel. "Mécanismes auto-adaptatifs pour la gestion de la Qualité de Service dans les réseaux de capteurs sans fil." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2011. http://tel.archives-ouvertes.fr/tel-00645504.
Full textManini, Malo. "Allocation de ressources et ordonnancement dans les réseaux de 5ème génération." Thesis, Rennes 1, 2021. http://www.theses.fr/2021REN1S003.
Full textThe increasing number of wireless network users and the diversification of their usage call for an evolution of the resource management methods. This thesis is based on 5G resource allocation techniques. In regular wireless networks, cells are managed independently. In this context, we propose a resource allocation algorithm with the aim of fairly guaranteeing the best service to users. When the cell charge is low enough to guarantee a sufficient quality of service, the algorithm redirects dynamically its priorities towards energy saving. This behavior allows to obtain an efficient compromise between capacity and energy consumption at different charge levels. In order to extend network capacity, the adding of new cells allows to broaden the available bandwidth and to reduce the distance induced signal attenuation. We present an algorithm of user repartition in a multi-cell context, which intervenes before the resource allocation stage. A user can be covered by several cells using different frequencies, thus its repartition will have strong repercussions on the cell charge balance and on the general quality of service in the system. The maximal number of cells in a sector is limited by its geographical environment. The Massive-MIMO allows to increase the cell functionalities while allowing a better energy directivity, and thus adding the spatial component to the resource allocation. We propose a new indicator evaluating the spatial compatibility of users based on past allocations. Once integrated in an allocation algorithm, it takes advantage of the superior capacities of Massive-MIMO