Дисертації з теми "Multi-Hop Wireless Sensor Network"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Multi-Hop Wireless Sensor Network".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Pinto, Luis Ramos. "Aerial Multi-hop Sensor Networks." Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1180.
Повний текст джерелаGuercin, Sergio Rolando. "Performance Evaluation of Opportunistic Routing Protocols for Multi-hop Wireless Networks." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38904.
Повний текст джерелаJung, Jin Woo. "Methods of cooperative routing to optimize the lifetime of multi-hop wireless sensor networks." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47622.
Повний текст джерелаZhang, Xin. "Network Formation and Routing for Multi-hop Wireless Ad-Hoc Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11470.
Повний текст джерелаChen, Quanjun Computer Science & Engineering Faculty of Engineering UNSW. "Analysis and application of hop count in multi-hop wireless ad-hoc networks." Awarded By:University of New South Wales. Computer Science & Engineering, 2009. http://handle.unsw.edu.au/1959.4/44769.
Повний текст джерелаMortada, Mohamad Rida. "Multi-hop routing for cognitive radio sensor network." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2021. http://www.theses.fr/2021ENTA0010.
Повний текст джерелаThe Wireless Sensor Network (WSN) consists of a large number of tiny devices called nodes, and these nodes are generally limited in power and they are randomly deployed in a geographical area for monitoring purpose. Because of the large number of nodes in the WSN, their demand on the frequency resources becomes a real challenge due to the spectrum scarcity. Cognitive Radio (CR) was introduced to enhance the spectral efficiency. The CR classifies users into the Primary User (PU) that holds a license over a spectrum bandwidth, and the Secondary User (SU), i.e., an opportunistic user. The integration of CR into WSN results in a cognitive radio sensor network (CRSN). In CRSN, the nodes behave as SUs. However,the adoption of CRSN may face several challenges. Indeed, network nodes may stop transmitting to avoid any harmful interference for PU. In addition, energy consumption constraint should be respected. Other features may be impacted by the adoption of CRSN, such as the clustering process and the in-network data aggregation, especially in a multi-hop routing based CRSN. In this manuscript, we tackle the challenges of the CRSN from different levels. Firstly, clustering nodes enhances network efficiency. In practice, grouping the network nodes saves energy during data transmission. Thus, we investigate the optimal number of clusters in the network based on energy consumption during data transmission and spectrum sensing to extend network lifespan. Then, we present LIBRO, a new uplink multi-hop routing protocol based on the geographical location information. LIBRO ensures delivery of rectified data packets in dense networks without knowledge of topology or path nodes. Finally, we used LIBRO and the energy harvesting technique to extend the CRSN's lifespan. Thus, by solving an optimization problem jointing the collision probability, energy consumption, packet delivery delay and packet delivery ratio, the appropriate parameters are found
Katayama, Masaaki, Takaya Yamazato, and Zheng Huang. "Optimal Cluster Partitioning for Wireless Sensor Networks with Cooperative MISO Scheme." IEEE, 2010. http://hdl.handle.net/2237/14500.
Повний текст джерелаHassan, Syed Ali. "Stochastic modeling of cooperative wireless multi-hop networks." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42799.
Повний текст джерелаZhang, Ruifeng. "Analysis of energy-delay performance in multi-hop wireless sensor networks." Lyon, INSA, 2009. http://theses.insa-lyon.fr/publication/2009ISAL0109/these.pdf.
Повний текст джерелаLes réseaux de capteurs sans fil représentent un nouveau paradigme dans les réseaux de communication qui permet de développer de nombreuses applications allant de la surveillance de l’environnement aux applications militaires. Les performances de ces réseaux peuvent être caractérisées par trois fonctions objectives caractérisant les transmissions de bout en bout: la fiabilité, le délai et la consommation d’énergie. Cette thése a pour but de trouver les param¨¨tres optimaux afin d’améliorer les performances de la couche physique, la couche MAC ainsi que la couche protocolaire des réseaux de capteurs. Dans ce travail, nous considérons la fiabilité comme un critère prépondérant et la traitons comme une contrainte dure. La consommation d’énergie et le délai de transmission sont considérés comme des contraintes secondaires concurrentes. Comme dans tous les réseaux radio, dans les réseaux de capteurs sans fil, les canaux radios ne sont pas fiables. Pour assurer la fiabilité bout-en-bout, la plupart des travaux existants, excluent les liens radios non fiables de la communication et se focalisent sur la sélection des liens fiables. Nous nous différencions par rapport à ces travaux par la prise en compte aussi bien des liens fiables que des liens non fiables. Nous démontrons aussi que les performances telles que la consommation d’énergie et le délai de transmission sont considérablement améliorées en exploitant efficacement les liens non fiables dans les réseaux, et tout en garantissant une fiabilité de bout en bout importante. Dans une première partie de la thèse, nous analysons le compromis entre la consommation d’énergie et le délai dans les réseaux multi-saut classiques. Nous proposons deux métriques. La première exprime l’efficacité énergétique sous la forme du rapport moyen énergie-distance par bit. La seconde exprime le délai sous la forme du rapport moyen délai-distance par bit. En utilisant ces deux métriques et un modèle réaliste de liaison radio à erreur, nous déduisons l’ensemble des solutions de compromis Energie-Délai sous la forme du front de Pareto à partir des performances d’une transmission à un saut, et obtenons une formule exprimant le compromis Energie-Délai. Ces résultats sont étendus aux transmissions multi-sauts. Ensuite, nous validons la limite inférieure à l’aide de simulations, sur des réseaux 2-D, issues d’une distribution Poissonnienne. Les analyses théoriques et les simulations montrent que les liens non-fiables dans les transmissions multi-sauts contribuent à améliorer l’efficacité énergétique du système ix évanouissements rapides de Rayleigh et le canal à évanouissements de Rayleigh par blocs. Sur la base de l’expression de la borne inférieure du compromis Energie-Délai, un cadre multi-couche est fourni pour optimiser les param¨¨tres des couches physique, MAC et routage sous contrainte de délai. Dans la seconde partie de la thèse, nous abordons après la non-fiabilité, une autre caractéristique importante des canaux sans fil, qui a trait à la nature diffusante des communications radio. Les communications opportunistes exploitent ces deux propriétés pour améliorer la performance du réseau. Nous analysons les performances d’énergie et de délai des communications opportunistes ainsi que l’optimisation des paramètres connexes. D’abord, nous proposons un cadre de conception pour évaluer l’efficacitè énergétique des communications opportunistes. Ce dernier fournit une méthode pour optimiser les différents mécanismes opportunistes. Ensuite, nous déduisons la borne inférieure du compromis Energie-Délais dans les communications opportunistes, tout en tenant compte du mécanisme de sélection des candidats pour une transmission optimale. La fromule exprimant la borne inférieure est obtenue sous l’hypothèse d’un nombre fixe de candidats à retransmettre. Un algorithme de recherche du nombre optimal de candidats est également proposé. Selon les analyses théoriques obtenues, nous proposons un nouvel algorithme opportuniste pour minimiser la consommation d’énergie face à une limite de délai moyen et intégrant les couches MAC et routage. Les résultats des simulations sur les mécanismes opportunistes proposés dans un réseau issu d’une distribution Poissonnienne correspondent à la limite inférieure théorique du compromis Energie-Délai. Enfin, nous discutons l’optimisation des paramètres de la couche physique. Dans la troisième partie de la thèse, nous considérons l’aspect coopératif des transmissions. Dans les communications opportunistes, seule la coopération de réception est réalisée, tandis que dans les communications coopératives prennent en compte une coopération des deux côtés : récepteur et émetteur. Dans cette partie, nous considérons l’approche CMIMO (cooperative multiple input multiple output). D’abord, nous analysons la baisse liée au compromis Energie-Délai de CMIMO par l’exploitation d’un modèle de liaison non fiable lorsque le nombre d’émetteurs et de récepteurs coopératifs est fixe. Ensuite, nous fournissons un algorithme de recherche du nombre optimal de noeuds coopératifs de chaque côté. Enfin, nous comparons les limites inférieures de ces trois schémas de communication dans les différents canaux respectivement. Les résultats obtenus montrent que pour parvenir à une meilleure performance Energie-Délai, les mécanismes de communication suivants devraient être adoptés selon le type de canal : les communications multi-saut traditionnelles sont les plus performantes pour le canal à bruit additif blanc Gaussien, alors que les communications opportunistes le sont pour les canaux à évanouissements de Rayleigh par blocs et enfin le CMIMO pour les canaux à évanouissements rapides de Rayleigh
Kim, Seong-Pyo Mitchell Kenneth H. "Analytical models of throughput performance over multi-hop wireless and sensor networks." Diss., UMK access, 2004.
Знайти повний текст джерела"A dissertation in telecommunications networking and computer networking." Advisor: Ken Mitchell. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Feb. 24, 2006. Includes bibliographical references (leaves 141-146). Online version of the print edition.
Huang, Zheng, Takaya Yamazato, and Masaaki Katayama. "Energy Efficiency of Cooperative MISO Technique in Multi-hop Wireless Sensor Networks." IEEE, 2008. http://hdl.handle.net/2237/12137.
Повний текст джерелаAit, Saadi Nadjib. "Multi-objective wireless sensor network deployment." Paris 6, 2010. http://www.theses.fr/2010PA066004.
Повний текст джерелаLin, Jian. "Design and analysis of MAC protocols for wireless multi-hop sensor and terahertz networks." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54866.
Повний текст джерелаWhite, Kevin A. "Tactical network load balancing in multi-gateway wireless sensor networks." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/39036.
Повний текст джерелаA tactical wireless sensor network (WSN) is a distributed network that facilitates wireless information gathering within a region of interest. For this reason, WSNs are finding increased use by the Department of Defense. A challenge in the deployment of WSNs is the limited battery power of each sensor node. This has a significant impact on the service life of the network. In order to improve the lifespan of the network, load balancing techniques using efficient routing mechanisms must be employed such that traffic is distributed between sensor nodes and gateway(s). In this thesis, we study load balancing from a cross-layer point of view, specifically considering energy efficiency. We investigate the impact of deploying single and multiple gateways on the following established energy aware load balancing routing techniques: direct routing, minimum transmission energy, low energy adaptive cluster head routing, and zone clustering. Based on the node die out statistics observed with these protocols, we develop a novel, energy efficient zone clustering algorithm called EZone. Via extensive simulations using MATLAB, we analyze the effectiveness of these algorithms on network performance for single and multiple gateway scenarios and show that the EZone algorithm maximizes network lifetime and service area coverage.
Raghunathan, Arun Roppel Thaddeus A. "Ad-hoc and multi-hop wireless sensor networks for activity capture in cooperative robotics." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/RAGHUNATHAN_ARUN_24.pdf.
Повний текст джерелаSAYADI, Afef. "Medium access protocol (MAC) design for wireless multi-hop ad hoc and sensor networks." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-00997665.
Повний текст джерелаSayadi, Afef. "Medium access protocol (MAC) design for wireless multi-hop ad hoc and sensor networks." Thesis, Evry, Institut national des télécommunications, 2013. http://www.theses.fr/2013TELE0002/document.
Повний текст джерелаWireless multi-hop ad hoc and sensor networks provide a promising solution to ensure ubiquitous connectivity for the Future Internet. Good network connectivity requires designing a reliable Medium Access Control (MAC) protocol, which is a challenging task in the ad hoc and sensor environments. The broadcast and shared nature of the wireless channel renders the bandwidth resources limited and expose the transmissions to relatively high collisions and loss rates. The necessity to provide guaranteed Quality of Service (QoS) to the upper layers triggered the design of conflict-free MAC protocols. The TDMA synchronization constraint is basically behind the rush of MAC protocol design based on a fixed frame size. This design shows inflexibility towards network variations and creates a network dimensioning issue that leads to a famine risk in case the network is under-dimensioned, and to a waste of resources, otherwise. Moreover, the alternative dynamic protocols provide more adaptive solutions to network topology variations at the expense of a fair access to the channel. Alongside with the efficient channel usage and the fair medium access, reducing the energy consumption represents another challenge for ad hoc and sensor networks. Solutions like node activity scheduling tend to increase the network lifetime while fulfilling the application requirements in terms of throughput and delay, for instance. Our contributions, named OSTR and S-OSTR, address the shortcomings of the medium access control protocol design in the challenging environment of wireless multi-hop ad hoc and sensor networks, respectively. For OSTR the idea consists in adopting a dynamic TDMA frame size that increases slot-by-slot according to the nodes arrival/departure to/from the network, and aiming to achieve a minimum frame size. For this end, OSTR couples three major attributes: (1) performing slot-by-slot frame size increase, (2) providing a spatial reuse scheme that favors the reuse of the same slot if possible, (3) and ensuring an on-demand frame size increase only according to the node requirements in terms of throughput. To tackle different frame sizes co-existence in the network, OSTR brings a cooperative solution that consists in fixing an appointment, a date when the frame size in the network is increased. Concerning S-OSTR, it is an amendment of OSTR for wireless sensor networks. It brings the idea of a dynamic active period, since it deploys a dynamic frame size that is built slot-by-slot according to nodes arrival to the network. S-OSTR enforces the slot-by-slot frame size increase by a node activity scheduling to prolong the inactivity period in the network, and hence prolong the overall network lifetime for wireless sensor networks. Our contributions are both based on the new dynamic TDMA frame size increase that consists in increasing the frame size slot-by-slot aiming to achieve a shorter frame size, and hence improve the channel utilization, and reduce the energy consumption. The performance analysis of OSTR and S-OSTR shows that they present good potentials to support QoS requirements, to provide energy-efficiency, to ensure fair medium access, to accommodate network topology changes and finally, to enhance robustness against scalability. The impact of this new TDMA frame size increase technique on the medium access control protocol performance is highlighted through multiple simulations of OSTR and S-OSTR. Multiple comparative studies are also handled to point out the effectiveness of this new technique and the soundness of our contributions
Levy, Daniel M. G. H. (Daniel Matthew Guy Ho) 1979. "A wireless, low power, asynchronous, multi-sensor, temperature network." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/28459.
Повний текст джерелаIncludes bibliographical references (leaves 63-64).
Wireless communication is not new. Radio and television broadcasting, as well as air traffic control have used wireless signals in their products for decades. The transmitters for these applications require large antennas and a lot of power to drive the signal to many receivers, certainly too much for any kind of battery to provide. However, a lot of new products today are moving toward wireless data transfer, and the majority of these require power levels low enough that they can run off of a battery. Examples include cellular phones, personal digital assistants, and ethernet cards for personal computers with the battery life ranging from a few hours to a few days. This thesis creates a low-power, battery-operated transmitter that reads the temperature from a sensor and then sends the data through an RF connection to a receiver, which then converts the information to human readable form. The transmitter can. perform a conversion about every minute and then go to sleep, allowing the battery to last for significantly longer than the wireless examples mentioned above. The temperature sensor system was developed and tested at the MIT High Voltage Research Laboratory. Low-power Motorola microcontrollers coded in assembly physically implement the transmitter receiver pair. A Dallas Semiconductor sensor performs the conversions, and an external system called TINI reads the data from the receiver and posts it to a web server as well as outputting it to a computer screen. Results indicate that the system works under most conditions, but long-term robustness and multiple sensor protocol need more development.
by Daniel M.G.H. Levy.
M.Eng.
Cho, Sunghwan. "Cooperative analog and digital (CANDI) time synchronization protocol for large multi-hop networks." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42915.
Повний текст джерелаRao, Shehryar. "A COMPOSITE APPROACH TO DEAL WITH LOCALIZATION PROBLEMS IN WIRELESS SENSOR NETWORK." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3399.
Повний текст джерелаApavatjrut, Anya. "De l'usage des codes fontaines dans les réseaux de capteurs multisauts." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00708449.
Повний текст джерелаYang, Fei. "Reliable and time-constrained communication in wireless sensor networks." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00706211.
Повний текст джерелаMei, Jian. "Distributed Coverage Control of Multi-Agent System in Convective–Diffusive Time Evolving Environments." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39601.
Повний текст джерелаDiab, Rana. "HMC-MAC : un protocole MAC hybride et multi-canal pour les réseaux de capteurs sans fil." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22580/document.
Повний текст джерелаThe use of multi-channel significantly improves the overall network performance of wireless sensor networks (WSNs) by allowing parallel transmissions over multiple channels. However, the design of a multi-channel MAC protocol in a multi-hop network requires an efficient channel allocation method that allows the coordination between the nodes in order to share available channels. In this thesis, we focus on the conception of a multi-channel MAC protocol that meets the requirements of high data collection applications in a multi-hop network. In order to achieve this goal, we first present the main techniques to use multiple channels to realize medium access sharing. Then, we propose a multi-channel MAC protocol that meets the requirements of high data rate WSNs, which combines three techniques TDMA, FDMA and CSMA. Indeed, we use a new channel assignment method that enables nodes to choose the most convenient channel in their 3-hop neighborhood in a distributed manner in order to minimize the effects of interferences and collisions. Finally, we evaluate by simulation the performance of our protocol and we compare it to other protocols proposed in the literature. The results show the efficiency of our proposition in the different studied scenarios
Nawaz, Shah. "Performance Study of ZigBee-based Green House Monitoring System." Thesis, Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24963.
Повний текст джерелаTsiontsiou, Evangelia. "Multi-constrained QoS Routing and Energy Optimization for Wireless Sensor Networks." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0340/document.
Повний текст джерелаIn this thesis, we focus on routing protocols for Wireless Sensor Networks (WSNs). The main research problems in the domain of routing data packets in a multi-hop network are the optimisation of the energy and the routing under multi-criteria QoS constraints (e.g., energy, reliability, delay, …). To address these problems, this dissertation proposes two contributions. Firstly, an optimal probabilistic routing protocol which balances the usage of energy and secondly, a routing protocol which is able to simultaneously take into account multiple QoS metrics. In fact, for balancing the energy consumption between the multiple existing links, the existing probabilistic routing protocols assign a probability to each link, either in an empirical way or depending on proportional energy level of the path. We did not know what are the optimal probabilities which lead to the optimal network lifetime. Our first contribution proposes optimal probabilities by modeling and solving a linear programming problem. As for the multi-constrainted QoS routing problem, multiple metrics are defined by RPL (a standard of IETF) but the existing protocols chose paths either according to only one metric or using a single aggregated function with multiple metrics, but never all the metrics simultaneously. In this dissertation, we first evaluate the performance of the operator calculus algebra introduced by R. Schott and S. Staples which defines an efficient algorithm allowing to find all the paths which satisfy the multiple constraints in a graph, and secondly we proposed a distributed version of this algorithm based on which a routing protocol has been designed. Both contributions are implemented in Contiki environment and simulated/emulated under Cooja (a software designed for simulating protocols of WSNs)
Rahat, Alma As-Aad Mohammad. "Hybrid evolutionary routing optimisation for wireless sensor mesh networks." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/21330.
Повний текст джерелаZhao, Yi. "Combination of Wireless sensor network and artifical neuronal network : a new approach of modeling." Thesis, Toulon, 2013. http://www.theses.fr/2013TOUL0013/document.
Повний текст джерелаA Wireless Sensor Network (WSN) consisting of autonomous sensor nodes can provide a rich stream of sensor data representing physical measurements. A well built Artificial Neural Network (ANN) model needs sufficient training data sources. Facing the limitation of traditional parametric modeling, this paper proposes a standard procedure of combining ANN and WSN sensor data in modeling. Experiments on indoor thermal modeling demonstrated that WSN together with ANN can lead to accurate fine grained indoor thermal models. A new training method "Multi-Pattern Cross Training" (MPCT) is also introduced in this work. This training method makes it possible to merge knowledge from different independent training data sources (patterns) into a single ANN model. Further experiments demonstrated that models trained by MPCT method shew better generalization performance and lower prediction errors in tests using different data sets. Also the MPCT based Neural Network Model has shown advantages in multi-variable Neural Network based Model Predictive Control (NNMPC). Software simulation and application results indicate that MPCT implemented NNMPC outperformed Multiple models based NNMPC in online control efficiency
Bonifácio, Tatiana Giorgenon. "Implementação de um protocolo mesh multi-hop baseado em algoritmo de roteamento geográfico para redes de sensores sem fio." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-04032011-150720/.
Повний текст джерелаThe technologies of wireless networks have to serve not only the most sophisticated business applications but also those that involve the tracking of animals, monitoring of structures, industrial automation and the management of urban utilities. This research project addresses the development of a protocol for multi-hop mesh network according to IEEE 802.15.4, with the use of geographical coordinates of each node for routing data in applications such as street lighting. In order to develop the network protocol, the routines library of the network interface, called Simple MAC (SMAC), is considered. This library can be used for establishing the geographic routing protocol destined for the multi-hop mesh network. In parallel it is proposed to describe a method to be adopted for the inclusion of geographic routing protocol in SMAC. The codes, developed in C programming language, are ported to the development platform of communication nodes of a specific toolkit and subjected to experimental tests. The results include the generation of theoretical and practical knowledge regarding the wireless sensor networks, as well as the development of open software for this type of network. The properties of self-organization of the network, robustness and low latency are proven in experimental tests.
Baccelli, Emmanuel. "IP-Disruptive Wireless Networking: Integration in the Internet." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00770791.
Повний текст джерелаDiallo, Chérif. "Techniques d’amélioration du routage et de la formation des clusters multi-sauts dans les réseaux de capteurs sans fil." Thesis, Evry, Institut national des télécommunications, 2010. http://www.theses.fr/2010TELE0017/document.
Повний текст джерелаWireless Sensor Networks (WSN) are used today in many applications that differ in their own objectives and specific constraints. However the common challenge in designing WSN applications comes from the specific constraints of micro-sensors because of their limited physical resources such as limited battery lifetime, weak computational capability and small memory capacity. This thesis aims to develop techniques to improve the energy efficiency of wireless sensor networks intended to a cold chain monitoring application. In such area, existing solutions consist of walled temperature recorders in warehouses and transport vehicles, which essentially control the room storage temperature which is not necessarily the product one. By integrating wireless micro-sensor devices with pallets and trays, one allows full real-time tracking of the cold chain originating from factories to the shelves of retailers. The first approach developed in this thesis concerns the phase of transporting food. The proposed VBS, WaS and eVBS protocols address the main issue resulting from the absence of a permanent base station in the small network deployed in a truck where nodes are generally in the same transmission range. These methods have the triple advantages of having a low overhead, increasing the ergonomics of the application and enhancing the economic interest of the network. In the state of art, there is no very large scale deployment of WSN for a cold chain monitoring system. Thus, the core of this thesis addresses the scalability issues by offering several ways to improve overall energy efficiency of the network. So, routing techniques improvement and efficient multi-hop clustering protocols are proposed through some original ideas using the Link Quality Indicator (LQI) provided by the MAC sublayer. The LQI is defined in the IEEE 802.15.4 standard in which its context of use is not specified. The link reliability based routing protocol (L2RP) which load balances the traffic between nodes, the single-node cluster reduction mechanism (SNCR) and the LQI-DCP multi-hop clusters formation protocol which improves clusterhead locations are some of contributions of this thesis which exploit the LQI to, significantly, increase the WSN efficiency. We also show that the MaxMin d-cluster formation heuristic does not support the grid deployment topology which is the more often used in WSN architectures
Ali, Mohamad Jaafar. "Wireless body area networks : co-channel interference mitigation & avoidance." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB252/document.
Повний текст джерелаA Wireless Body Area Network (WBAN) is a short-range network that consists of a coordinator (Crd) and a collection of low-power sensors that can be implanted in or attached to the human body. Basically, WBANs can provide real-time patient monitoring and serve in various applications such as ubiquitous health-care, consumer electronics, military, sports, etc. [1]. As the license-free 2.4 GHz ISM band is widely used among WBANs and across other wireless technologies, the fundamental problem is to mitigate the resulting co-channel interference. Other serious problems are to extend the network lifetime and to ensure reliable transmission within WBANs, which is an urgent requirement for health-care applications. Therefore, in this thesis, we conduct a systematic research on a few number of research problems related to radio co-channel interference, energy consumption, and network reliability. Specifically, we address the following problems ranging from theoretical modeling and analysis to practical protocol design: • Intra-WBAN interference mitigation and avoidance • Cooperative inter-WBAN interference mitigation and avoidance • Non-cooperative inter-WBAN interference mitigation and avoidance • Interference mitigation and avoidance in WBANs with IoT Firstly, to mitigate the intra-WBAN interference, we present two mechanisms for a WBAN. The first is called CSMA to Flexible TDMA combination for Interference Mitigation, namely, CFTIM, which dynamically allocates time-slots and stable channels to lower the intra-WBAN interference. The second is called Interference Avoidance Algorithm, namely IAA that dynamically adjusts the superframe length and limits the number of channels to 2 to lower the intra-WBAN interference and save energy. Theoretically, we derive a probabilistic model that proves the SINR outage probability is lowered. Simulation results demonstrate the effectiveness and the efficiency of CFTIM and IAA in terms of lowering the probability of interference, extending network lifetime, improving throughput and reliability. Secondly, we address the problem of interference among cooperative WBANs through using orthogonal codes. Motivated by distributed time provisioning supported in IEEE 802.15.6 standard [2], we propose two schemes. The first is called Distributed Time Correlation Reference, namely, DTRC that provides each WBAN with the knowledge about which superframes overlap with each other. The second is called Orthogonal Code Allocation Algorithm for Interference Mitigation, namely, OCAIM, that allocates orthogonal codes to interfering sensors belonging to sensor interference lists (SILs), which are generated based on the exchange of power-based information among WBANs. Mathematically, we derive the successful and collision probabilities of frames transmissions. Extensive simulations are conducted and the results demonstrate that OCAIM can diminish the interference, improve the throughput and save the power resource. Thirdly, we address the problem of co-channel interference among non-cooperative WBANs through time-slot and channel hopping. Specifically, we propose two schemes that are based on Latin rectangles. The first is called Distributed Algorithm for Interference mitigation using Latin rectangles, namely, DAIL that allocates a single channel to a timeslot combination to each sensor to diminish inter-WBAN interference and to yield better schedules of the medium access within each WBAN. The second is called Channel Hopping for Interference Mitigation, namely, CHIM, which generates a predictable interference free transmission schedule for all sensors within a WBAN. CHIM applies the channel switching only when a sensor experiences interference to save the power resource. Furthermore, we present an analytical model that derives bounds on collision probability and throughput for sensors transmissions. (...)
Pulugurtha, Satya Venkata Sidhi Vinayak, and Kishore Kumar Atragadda. "A Multi-layered Routing Technique for Sensing Train Integrity and Composition." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-19489.
Повний текст джерелаMeghji, Mahir Lumumba. "On a Joint Physical Layer and Medium Access Control Sublayer Design for Efficient Wireless Sensor Networks and Applications." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/590.
Повний текст джерелаAl-Olimat, Hussein S. "Optimizing Cloudlet Scheduling and Wireless Sensor Localization using Computational Intelligence Techniques." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1403922600.
Повний текст джерелаPeng, Tingqing. "WSN Routing Schedule Based on Energy-aware Adaptation." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39223.
Повний текст джерелаBenatia, Mohamed Amin. "Optimisation multi-objectives d’une infrastructure réseau dédiée aux bâtiments intelligents." Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0024/document.
Повний текст джерелаIn this thesis, we studied the Wireless Sensor Network deployment for indoor environments with a focus on smart building application. The goal of our work was to develop a WSN deployment tool which is able to assist network designers in the deployment phase. We begin this thesis with network modeling of all the deployment parameters and requirement, such as : cost, coverage, connectivity and network lifetime. Thereafter, we implement five optimisation methods, including three multi-objective optimization agorithms, to resolve WSN deployment problem. Then, two realistics study cases were identified to test the performances of the aforementioned algorithms. The obtained results shows that these algorithms are very efficient for deploying a small scale network in small buildings. However, when the building surface becomes more important the algorithms tends to converge to local optimum while consuming high processing time. To resolve this problem, we develop and implement a new Hybrid multi-objectif optimization algorithm wich limits the number of direct evaluation. This algorithm is based on data-mining methods (Artificial Neural Networks and K-means) and tries to approximate the fitness value of each individual in each generation. At every generation of the algorithm, the population is divided to K clusters and we evaluate only the closest individual to cluster centroide. The fitness value of the rest of population is approximated using a trained ANN. A comparative study was made and the obtained results show that our method outperformes others in the two sudy cases (small and big buildings)
Niklasson, Johan, and Oskar Hahr. "Topology optimization for distributed consensus in multi-agent networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259352.
Повний текст джерелаDistribuerade nätverk bestående av flera agenter som har som uppgift att tillsammans nå gemensamma resultat har blivit allt mer populärt. Ett sådant användningsområde är hur drönare kan användas för att observera och upptäcka skogsbränder över en given yta. I en sådan tillämpning är det av stor vikt att drönarnätverket kan kommunicera och kongruera över värden nätverket delar med varandra. Dessa värden kan representera händelser som nätverket har som uppgift att upptäcka eller en riktning för drönarna att flyga i. Det är inte alltid garanterat att det finns en central kommunikationscentral för sådana nätverk, utan blir beroende på att kommunicera med varandra för att utbyta och kongruera över värden. Den här rapporten fokuserar på en avgränsad del av det ovanstående problemet som kallas för distribuerat konsensusvärde (eng. distributed averaging). Rapporten undersöker hur ett sådant nätverks konvergeringsförmåga, totala energikostnad samt täckning påverkas när fler drönare tillförs till nätverket. När arbetsytan var satt till statisk storlek visade resultaten att den tillförda energikostnaden per drönare var högre för små nätverk än för större nätverk. Det visades också att hastigheten som nätverket når ett kongruerande värde inte nödvändigtvis påverkas av storleken av nätverket. När arbetsytan ökade i takt med storleken på nätverket observerades däremot motsatt effekt för energikostnad och hastigheten för att nå ett konsensusvärde.
Scofield, Dan. "Hop-by-hop transport control for multi-hop wireless networks /." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1812.pdf.
Повний текст джерелаSarr, Moussa Dethié. "Spécification d’un mécanisme de construction automatique de topologies et d'adressage permettant la gestion dynamique des réseaux de capteurs sans fil linéaires." Thesis, Université Clermont Auvergne (2017-2020), 2018. http://www.theses.fr/2018CLFAC001/document.
Повний текст джерелаLinear wireless sensor network (LWSN) are a sub-case of wireless sensor network where sensor nodes are roughly deployed through multiple long lines with branches. LWSN are used to monitor infrastructures such as roads, pipelines, and naturals entities such as rivers.Classical solutions of topology construction and addressing are inefficient on LWSN . Indeed, with initials networks parameters such as the maximum number of children per node (Cm), the maximum number of children routers per node (Rm), and the maximum tree depth, a solution like ZigBee causes a waste of available address space of network nodes and limit the depth of the addressable tree to 15 hops. Other solutions proposed for LWSN use a cluster-tree organisation and are based on initial network parameters such as the maximum number of children clusters per cluster. In addition, these solutions require a lot of manual intervention on different sensor nodes and do not allow adaptation for a network extension (addition of a set of new sensor nodes). In this thesis, we propose protocols to allow the automatic construction of topologies, the addressing and the data routing for linear wireless sensor networks. Our contribution also provides mechanisms for dynamic management of LWSN (addition of new nodes, addresses reallocation, and data routing to multiple sink nodes). Our different protocols are evaluated using Castalia/Omnet++ simulator. Results of our simulations show that our protocols allow a construction of connected LWSN with very few orphan nodes and without depth limitations. We also show that our contribution allows to add many new nodes on different LWSN, and adapts to the deployment of multiple sinks to improve the ratio and the latency of data delivery packets
Chaltseva, Anna. "Network state estimation in wireless multi-hop networks." Licentiate thesis, Luleå tekniska universitet, Datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26357.
Повний текст джерелаGodkänd; 2012; 20111215 (anncha); LICENTIATSEMINARIUM Ämnesområde: Datorkommunikation/Computer Networking Examinator: Docent Evgeny Osipov, Institutionen för system- och rymdteknik, Luleå tekniska universitet Diskutant: Universitetslektor Olov Schelén, Luleå tekniska universitet samt Xarepo AB, Luleå Tid: Måndag den 20 februari 2012 kl 10.00 Plats: A1514 Demostudion, Luleå tekniska universitet
OKADA, Hiraku, Nobuyuki NAKAGAWA, Tadahiro WADA, Takaya YAMAZATO, and Masaaki KATAYAMA. "Multi-Route Coding in Wireless Multi-Hop Networks." IEICE, 2006. http://hdl.handle.net/2237/9581.
Повний текст джерелаOkada, Hiraku, Nobuyuki Nakagawa, Tadahiro Wada, Takaya Yamazato, and Masaaki Katayama. "Multi-Route Coding in Wireless Multi-Hop Networks." IEICE, 2006. http://hdl.handle.net/2237/7836.
Повний текст джерелаPereira, Luiz Arthur Malta. "Desenvolvimento de uma linha experimental de escala reduzida para produção de biscoitos utilizando uma rede de multi sensores com protocolo \"ZIG-BEE\"." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/74/74132/tde-14032013-154613/.
Повний текст джерелаApproximately 15% of the revenues of Brazilian industries from the food industry is responsible for employing over a million people. For large scale production is necessary for these industries are technologically prepared, however much of the electronic instrumentation and control equipment still requires foreign technology. To keep up with growth and global trends in this area, it is necessary to promote research and technological innovation. These innovations can improve sales to this sector, mainly in health food and fast preparation. By contrast, many of these companies even have departments of research and development, especially regarding the use of information technology to aggregate electronic instrumentation, focusing on food production. That is precisely where it belongs this project aims to develop an experimental production line mini biscuits with electronic monitoring and computing, which can estimate the ideal point of the mass and control the production of biscuits automatically. To prove the feasibility of applying the technologies developed in the food industry, a biscuit production line was designed and built at the laboratory scale, using sensors and actuators with wireless zigbee protocol were installed along the line. In order to examine the internal temperature of the cookie during its baking, a tunnel-based refractory cement is designed to protect the sensor node, allowing it to follow the cookie into the oven and the temperature inside the collecting biscuit. It was also developed a sensor capable of capturing real time data regarding the mass, by reading the current used by the motor of the mixer, since this current is related to the torque applied to the mass. The proposed methodology proved the feasibility of using wireless sensor zigbee-protocol, and shown to be possible to estimate the ideal point of the mass through the system developed, start the manufacturing process and automatically control all processes involved
Kovacevic, I. (Ivana). "Congestion control and spectrum sharing in multi-operator multi-hop wireless network." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201503111139.
Повний текст джерелаChi, Yang. "Effective Use of Network Coding in Multi-hop Wireless Networks." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384428269.
Повний текст джерелаVaidyanathan, Sivaramakrishnan. "Efficient Reorganization of a multi-hop Wireless Body Area Network." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1413472078.
Повний текст джерелаAl-Kofahi, Osameh. "Network coding-based survivability techniques for multi-hop wireless networks." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3389283.
Повний текст джерелаYue, Jing. "Distributed Joint Network-Channel Coding in Multi-Hop Wireless Networks." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15884.
Повний текст джерелаLiu, Lu. "Performance Analysis and Optimization of One-hop Network Coding in Multi-hop Wireless Networks." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150817.
Повний текст джерела