No / This paper proposes a novel call admission control (CAC) algorithm and develops a two-dimensional markov chain processes (MCP) analytical model to evaluate its performance for heterogeneous wireless network. Within the context of this paper, a hybrid UMTS-WLAN network is investigated. The designed threshold-based CAC algorithm is launched basing on the user’s classification and channel allocation policy. In this approach, channels are assigned dynamically in accordance with user class differentiation. The two-dimensional MCP mathematical analytic method reflects the system performance by appraising the dropping likelihood of handover traffics. The results show that the new CAC algorithm increases the admission probability of handover traffics, while guarantees the system quality of service (QoS) requirement.

Le réseau électrique a subi d’importantes évolutions ces dernières décennies, pour devenir ce qu’on appelle le Smart Grid. Le réseau électrique évolue actuellement d’une architecture centralisée vers une architecture décentralisée, tenant compte des consommations et sources d’énergies à caractère imprédictible et irrégulier. L’Advanced Metering Infrastructure est une architecture clé du Smart Grid qui permet des communications bidirectionnelles entre le consommateur et le fournisseur d’énergie. Les réseaux de compteurs intelligents qui constituent notamment cette architecture reposent communément sur des communications à courant porteur, une technologie qui est hautement sensible aux interférences. Malgré l’utilisation de protocoles de niveau 2 spécifiques, les technologies employées ne permettent pas de respecter les exigences de toutes les applications Smart grid. La plupart des technologies considérées pour les réseaux de compteurs intelligents sont de courte portée, chaque compteur ne peut communiquer directement avec le concentrateur. Les noeuds doivent collaborer entre eux, utilisant un protocole de routage tel que RPL pour atteindre la destination. Le but de cette thèse est d’adapter RPL à un environnement multi interfaces, et étudier comment l’hétérogénéité des interfaces peut améliorer la fiabilité et les performances d’un réseau de compteurs intelligents. / Since decades, the power grid is Under going a tremendous evolution, toward what is called the Smart Grid. The grid is actually evolving from a centralized architecture to a decentralized one, taking into account all the unpredictable sources and consumption. The Advanced Metering Infrastructure is the network dedicated to the Smart Grid that allows two-ways communications between the consumers and the energy providers. Smart Meters networks, that are part of this architecture, rely on powerline communications, a technology that is highly sensitive to interference. Despite dedicated layer 2 protocols, the employed technologies cannot fulfill most of smart grid applications requirements. The majority of smart meter network technology candidates are short range, each meter cannot reach the concentrator in one hop. Nodes need to collaborate, using a routing protocol like RPL to reach the destination. The goal of this thesis is to modify RPL to a multi interfaces environment, and study how interface heterogeneity could increase the reliability and the performance of a smart meter network.

Next generation heterogeneous wireless networks are expected to interwork with Internet Protocol (IP)-based infrastructures. Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide IP-based packet access, it becomes attractive to break these “service silos” by offering a converged set of IP-based services to users who may access these services using a number of alternative access networks. This trend has started with third generation cellular mobile networks, which have standardized on the use of the IP Multimedia Subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. The future users of communication systems will subscribe to both IP-based and Circuit Switched (CS) based services and in the foreseeable future a single database that handles user profiles across all domains will be required. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of savings in signaling cost and better delay performance. The existing call delivery approaches in cellular networks may not be well suited for future communication systems because they suffer from unnecessary usage of network resources for call attempts that may fail which adds to excessive signaling delays and queuing costs. Reducing the number of queries and retrievals from the database will have a significant impact on the network performance. We present a new scheme based on Reverse Virtual Call setup (RVC) as a solution to the call delivery problem in heterogeneous wireless networks and evaluate the performance of this framework.

Next generation heterogeneous wireless networks are expected to interwork with Internet Protocol (IP)-based infrastructures. Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide IP-based packet access, it becomes attractive to break these “service silos” by offering a converged set of IP-based services to users who may access these services using a number of alternative access networks. This trend has started with third generation cellular mobile networks, which have standardized on the use of the IP Multimedia Subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. The future users of communication systems will subscribe to both IP-based and Circuit Switched (CS) based services and in the foreseeable future a single database that handles user profiles across all domains will be required. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of savings in signaling cost and better delay performance. The existing call delivery approaches in cellular networks may not be well suited for future communication systems because they suffer from unnecessary usage of network resources for call attempts that may fail which adds to excessive signaling delays and queuing costs. Reducing the number of queries and retrievals from the database will have a significant impact on the network performance. We present a new scheme based on Reverse Virtual Call setup (RVC) as a solution to the call delivery problem in heterogeneous wireless networks and evaluate the performance of this framework.

Τα δίκτυα αισθητήρων είναι μια εξειδικευμένη κατηγορία κατανεμημένων δικτύων, η οποία τα τελευταία χρόνια έχει συγκεντρώσει το ενδιαφέρον της ερευνητικής κοινότητας, λόγω του ευρύτατου πεδίου εφαρμογών της. Τα δίκτυα αυτά αποτελούνται από συσκευές που διαθέτουν αισθητήρες (sensors) και ενδεχομένως μηχανισμούς δράσης (actuators) και είναι διασκορπισμένες στο χώρο, με δυνατότητα επικοινωνίας μεταξύ τους και επεξεργασίας σε ένα βαθμό της πληροφορίας που διακινούν στο δίκτυο. Στόχος των δικτύων αυτών είναι η παρακολούθηση της εξέλιξης ενός φαινόμενου, ή η ανίχνευση περιβαλλοντικών συνθηκών και η αποστολή των δεδομένων που συλλέγονται σε έναν κεντρικό κόμβο, το κέντρο ελέγχου. Οι δυνατότητες των συσκευών είναι κατά κανόνα περιορισμένες, λόγω του μικρού μεγέθους τους, του χαμηλού κόστους τους και ενίοτε του αναλώσιμου ρόλου τους. Οι εφαρμογές των δικτύων αυτών ποικίλουν, από εφαρμογές στην επιστήμη γεωργίας ακριβείας, στην πυρανίχνευση και την παρακολούθηση συνθηκών περιβάλλοντος σε κτιριακές εγκαταστάσεις, μέχρι εφαρμογές ανίχνευσης κίνησης των εχθρικών μονάδων σε πεδίο μάχης, ή παρακολούθησης φαινόμενου που εξελίσσεται σε δυσπρόσιτη περιοχή. Μερικές από τις βασικές προκλήσεις που προκύπτουν σε αυτά τα δίκτυα, λόγω της φύσης τους, είναι η βέλτιστη διαχείριση των ενεργειακών πόρων κάθε κόμβου, η αποδοτική συνδυαστική επεξεργασία των διακινούμενων μηνυμάτων και η αξιόπιστη δρομολόγηση της πληροφορίας που συλλέγεται προς το κέντρο ελέγχου, καθώς και η δυναμική και αυτόνομη οργάνωση του δικτύου. Η εξέλιξη των δικτύων αισθητήρων σε συνδυασμό με την επιθυμία υλοποίησης περίπλοκων και περισσότερο ολοκληρωμένων εφαρμογών, οδήγησε σε δίκτυα που περιέχουν ετερογενείς κόμβους, όπως για παράδειγμα κόμβους με διαφορετική αρχιτεκτονική, διαφορετικούς αισθητήρες, με διαφορετικές επεξεργαστικές και επικοινωνιακές ικανότητες ή και κόμβους με δυνατότητες κίνησης ή επιτέλεσης εργασιών (actuators) σε απόκριση εντολών που λαμβάνουν από το κέντρο ελέγχου. Επιπρόσθετα, σε πολλές εφαρμογές διαφαίνεται η ανάγκη για διασύνδεση πολλαπλών δικτύων αισθητήρων και διάδοση της πληροφορίας που συλλέγουν μέσω του διαδικτύου προς απομακρυσμένους εξυπηρετητές με αυξημένες επεξεργαστικές ικανότητες, προς βάσεις δεδομένων, συσκευές pda ή κινητά τηλέφωνα, σταθμούς εργασίας τελικών χρηστών και άλλες συσκευές. Δημιουργείται με αυτόν τον τρόπο ένα ευρύτερο ετερογενές δίκτυο επικάλυψης (overlay sensor network), η διαχείριση και αποδοτική χρήση του οποίου απαιτεί νέες αρχιτεκτονικές οργάνωσης των επιμέρους δικτύων, προσαρμοσμένα πρωτόκολλα διάδοσης πληροφορίας και πλατφόρμες που διευκολύνουν τον προγραμματισμό των δικτύων αυτών. Για το λόγο αυτό η επιστημονική κοινότητα επικεντρώνει το ενδιαφέρον της στο σχεδιασμό ειδικών περιβαλλόντων λογισμικού που μεσολαβούν ανάμεσα στον προγραμματιστή εφαρμογών και τα ετερογενή δίκτυα αισθητήρων, τα οποία ανήκουν στην κατηγορία των middleware. Τα περιβάλλοντα αυτά αναλαμβάνουν να διαχειριστούν θέματα χαμηλού επιπέδου ή και ανώτερων επιπέδων στα δίκτυα αισθητήρων, που δεν θα έπρεπε να απασχολούν τον προγραμματιστή κάθε φορά που επιθυμεί να υλοποιήσει μια εφαρμογή. Απώτερος σκοπός είναι να παρέχουν υπηρεσίες υψηλού επιπέδου και ομοιογενείς λογικές αφαιρέσεις πάνω στα ετερογενή δίκτυα, ενώ είναι επιθυμητή η αποδοτική λειτουργία τους σε παγκόσμια κλίμακα όπου πολλά γεωγραφικά διάσπαρτα δίκτυα συνεργάζονται για να παρέχουν τις υπηρεσίες τους με οργανωμένο και καλά ορισμένο τρόπο. Η δική μας συνεισφορά στην έρευνα του πεδίου αυτού, έγκειται πρώτα στη μελέτη ήδη διαθέσιμων προτάσεων middleware για τον προγραμματισμό και τη διασύνδεση πολλαπλών και ετερογενών δικτύων αισθητήρων, με σκοπό τον εντοπισμό των θεμάτων και προβλημάτων που αντιμετώπισαν κατά το σχεδιασμό τους, την ανάλυση της αρχιτεκτονικής τους και την αξιολόγηση της απόδοσής τους. Επιθυμώντας να δώσουμε τη δική μας πρόταση στο πεδίο των middleware για δίκτυα αισθητήρων και αξιοποιώντας τα συμπεράσματά μας από την μελέτη των άλλων προτάσεων, σχεδιάσαμε και υλοποιήσαμε το middleware σύστημα ShareSense II. Το σύστημα ShareSense II προέρχεται από τον επανασχεδιασμό τού αρχικού και απλούστερου ShareSense και ενσωματώνει το middleware jWebDust επεκτείνοντας κατά ένα τρόπο την αρχιτεκτονική του, ώστε να υποστηρίζει δίκτυα επικάλυψης (overlay sensor networks) μεγάλης κλίμακας. Η πλατφόρμα του ShareSense II σχεδιάστηκε για να παρέχει λογική αφαίρεση των δικτύων αισθητήρων, ώστε ο προγραμματιστής να μπορεί εύκολα να ρυθμίσει τις υπηρεσίες που παρέχει ένα δίκτυο επικάλυψης, να διαχειρίζεται τις λειτουργίες των επιμέρους δικτύων, να μπορεί να προγραμματίσει δυναμικά τη συμπεριφορά τους και να καθορίσει τον τρόπο παρουσίασης της χρήσιμης πληροφορίας που αποκομίζει από αυτά, στον τελικό χρήστη. Βασιζόμενοι στην ευέλικτη υποδομή των peer-to-peer δικτύων, προτείνουμε μια λύση για τη διασύνδεση πολλαπλών ετερογενών δικτύων αισθητήρων με συσκευές και σταθμούς εργασίας πάνω από το διαδίκτυο. Δώσαμε έμφαση στην επεκτασιμότητα της αρχιτεκτονικής ως προς τις υποστηριζόμενες υπηρεσίες και τύπους δικτύων, την αξιοποίηση και τη συνεργασία με υπάρχοντα middleware που διαχειρίζονται κάποια επιμέρους δίκτυα και την παροχή χρήσιμων διεπαφών για την εύκολη υλοποίηση πρακτικών εφαρμογών. Υλοποιήσαμε, τέλος, μια εφαρμογή η οποία στηρίζεται στην πλατφόρμα του ShareSense II για να τεκμηριώσουμε την επάρκεια της αρχιτεκτονικής του συστήματός μας και να εντοπίσουμε τα σημεία όπου απαιτείται βελτίωσή της. Η εφαρμογή χρησιμοποιεί το περιβάλλον του Google Earth για την παρακολούθηση των επιμέρους δικτύων που συμμετέχουν στο σύστημα, επιτρέποντας παράλληλα τη δυναμική υποβολή ερωτημάτων και την αντιστοίχιση των δικτύων σε τρισδιάστατα μοντέλα κτιρίων και άλλων περιοχών, ώστε να είναι άμεση και εύληπτη η παρουσίαση της πληροφορίας στον τελικό χρήστη. / Sensor networks are a special case of distributed networks, which in the recent years have become increasingly interesting to the scientific community, due to their wide range of applications. These networks are comprised of devices that have sensors attached to them and possibly even actuators, and are scattered in a field, being able to comminucate with each other and process -to a certain degree- information that they forward in the network. Among the goals of these networks are the monitoring of physical phenomena, the detection of special events or conditions and consequently the communication of the acquired information towards a control center. These devices usually have strict constraints on their capabilities due to their small size, their low production cost and quite often their expendable role. The applications of these networks vary, from applications in the precision agriculture field, fire detection and monitoring environmental conditions in buildings and offices, to applications for the detection of enemy units' movements in the battlefield or observing a physical phenomenon in a inaccessible location. Some of the important challeges that emerge for these networks are the optimal management of the power resources of each node, the efficient aggregation of the in-network messages and the reliable routing of information acquired towards the control center, as well as the autonomous and adaptive network operation. The evolution in the sensor netorks research in combination with the desire to implement even more sophisticated applications, has led to highly heterogeneous networks, where nodes belong to different architectures, they use various sensor models, and they have different processing and communicating capabilities. Additionally, in many applications there is the need to interconnect multiple sensor networks and to distribute the information collected locally towards remote servers, databases, pda devices or cell phones, workstations and other end user devices. Thus, a new type of networks, the overlay networks, emerges. The administration and effecient usage of these networks require new management architectures for the local networs, adaptive protocols for the distribution of information and new software platforms that simplify application programming. Following these developments, the scientific community has focused in designing middleware software for the sensor networks. Such software have the role of managing low level or intermediate level issues, that should not burden a programmer every time s/he needs to design and implement a new application. The main goal of middleware is to provide high level services and unified logical abstractions over heterogeneous sensor networks, and to perform well in a global scale where multiple geographically disparate networks cooperate to provide services in an organized and well defined manner. Our contribution to this field, is foremost to study the state of the art middleware projects for overlay sensor networks, in an effort to understand the issues and problems that were faced during their design, to analyze their architecure and evaluate their performance. We have used the results of this study to design and implement a new middleware architecture, which we have named ShareSense II. Our middleware comes from the redesign and expansion of its simpler predecessor, the original ShareSense middleware, and also integrates the jwebdust middleware, bringing the services of that middleware to the large scal overlay networks. The ShareSense II platfrom was designed to provide logical abstractions for sensor networks, so that the programmer is able to tweak their services, maange the resources of the local networks and build flexible applications. For our overlay netowrk we have embedded an efficient peer-to-peer infrastructure that performs well in networks with frequent and temporary node disconnections and large scale applications. Finally, we implemented an application that uses the ShareSense II middleware, in order to show the benefits of our design and also locate the parts of the architecture that need further optimization. Our application uses the Google Earth software to monitor geographically disparate networks that participate in ShareSense II, allowing the online issuing of queries, as well as matching 3d models of buildings (and other areas) to local networks, in order to display information to the end user in an interesting and exciting way.

Next generation heterogeneous wireless networks are expected to interwork with Internet Protocol (IP)-based infrastructures. Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide IP-based packet access, it becomes attractive to break these “service silos” by offering a converged set of IP-based services to users who may access these services using a number of alternative access networks. This trend has started with third generation cellular mobile networks, which have standardized on the use of the IP Multimedia Subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. The future users of communication systems will subscribe to both IP-based and Circuit Switched (CS) based services and in the foreseeable future a single database that handles user profiles across all domains will be required. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of savings in signaling cost and better delay performance. The existing call delivery approaches in cellular networks may not be well suited for future communication systems because they suffer from unnecessary usage of network resources for call attempts that may fail which adds to excessive signaling delays and queuing costs. Reducing the number of queries and retrievals from the database will have a significant impact on the network performance. We present a new scheme based on Reverse Virtual Call setup (RVC) as a solution to the call delivery problem in heterogeneous wireless networks and evaluate the performance of this framework. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

Les futurs réseaux sans fil devront être conçus pour répondre aux besoins hétérogènes de systèmes entièrement différents. De nouveaux services soumis à des contraintes variées coexisteront avec les utilisateurs actuels sur la même bande de fréquences. L'OFDM, la couche physique utilisée par les systèmes actuels, souffre d’un mauvais confinement spectral et ne permet pas cette coexistence. De nombreuses nouvelles formes d'onde avec une localisation spectrale améliorée ont donc été proposées. Nous étudions la coexistence de nouveaux systèmes basés sur ces formes d'onde avec des utilisateurs OFDM préexistant. Nous fournissons la première analyse théorique et expérimentale de l'interférence inter-système qui se produit dans ces scenarios. Nous appliquons ensuite cette analyse pour évaluer les performances de différentes formes d'ondes avancées et nous étudions finalement les performances d'un réseau où des utilisateurs cellulaires OFDM coexistent avec des paires D2D utilisant l'une des formes d'ondes améliorées étudiées. / Future wireless networks are envisioned to accommodate the heterogeneous needs of entirely different systems. New services obeying various constraints will coexist with legacy cellular users in the same frequency band. This coexistence is hardly achievable with OFDM, the physical layer used by current systems, because of its poor spectral containment. Thus, a myriad of multi-carrier waveforms with enhanced spectral localization have been proposed for future wireless devices. In this thesis, we investigate the coexistence of new systems based on these waveforms with legacy OFDM users. We provide the first theoretical and experimental analysis of the inter-system interference that arises in those scenarii. Then, we apply this analysis to evaluate the merits of different enhanced waveforms and we finally investigate the performance achievable by a network composed of legacy OFDM cellular users and D2D pairs using one of the studied enhanced waveforms.

La présente thèse s’intéresse aux communications descendantes, plus spécifiquement aux canaux de multidiffusion, pour lesquels un émetteur diffuse un message commun destiné à tous les utilisateurs d’un groupe. Pour que le débit ne soit pas limité par le plus faible utilisateur en terme de qualité de canal, différentes solutions reposant sur des techniques entrées multiples sorties multiples massives ou multi-débit ont été proposées dans la littérature. Cependant, si tous les utilisateurs souhaitaient obtenir le même niveau de qualité, le plus faible utilisateur établirait le débit et/ou nécessiterait une quantité de ressources démesurée, ce qui impacterait tout le groupe. Les études récentes portant sur les communications d’appareil à appareil ouvrent la voie à la coopération entre utilisateurs proches, ce qui pourrait bénéficier à tous les utilisateurs, en garantissant le même niveau de qualité tout en maintenant un faible coût en ressource et en énergie. C’est pour ces raisons que cette thèse s’intéresse aux canaux de multidiffusion avec coopération entre récepteurs. La théorie de l’information formalise l’étude de ces réseaux et fournit des bornes universelles portant sur le débit transmissible. Le schéma de coopération proposé se base sur une superposition appropriée d’opérations de compresse-relaie (CF) et décode-relaie (DF), et il est prouvé que ses performances surpasse celles des schémas de coopérations non-interactifs pour le scénario à deux récepteurs. Les propriétés de la coopération interactive émergent de l’asymétrie de construction du schéma de coopération, ce qui permet d’adapter l’ordre des CFs et DFs en fonction de la qualité du canal. L’idée derrière cette interaction, les intuitions concernant les points clés de la construction, et des résultats numériques sont donnés pour des réseaux de petites tailles. Des simulations au niveau du système illustrent le gain potentiel que la coopération entre récepteurs pourrait apporter pour des réseaux de plus grandes tailles. / The present thesis concentrates on downlink communications. In order to tackle one part of this challenging problem, we focus on the multicast channel in which one transmitter broadcasts a common message intended to a whole group of users. To ensure that the transmission rate is not limited by the weakest user in terms of channel quality, different solutions using massive multiple-input multiple-output or multirate strategies have been proposed in the literature. However, if all users wish to obtain the same content quality, the weakest user would set the rate and/or require a disproportionate amount of resource, and thus impact the whole group. With the recent study of device-to-device mechanisms, user cooperation in close proximity becomes possible and would benefit to all users by ensuring the same content quality while maintaining a low cost in terms of amount of resource and energy. Consequently, this thesis is centered around the multicast network with receiver cooperation. Information-theoretic tools formalize the study of the network considered and provide general bounds on the achievable transmission rate. The proposed cooperation scheme is based on an appropriate superposition of compress-forward (CF) and decode-forward (DF) operations, and provenly outperform non-interactive schemes in the two-receiver scenario. Properties of the interactive cooperation emerge from the asymmetric construction of the scheme which permits to adapt the order of CFs and DFs according to the channel condition. The core idea of the interaction, some insights on key construction points, and numerical results are given for small size networks. System level simulations illustrate the potential gain of receiver cooperation for larger networks.

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Made available in DSpace on 2016-04-29T13:30:58Z (GMT). No. of bitstreams: 1 Jacy Correa Curado.pdf: 1878864 bytes, checksum: 30c8d5cefd3066c88698e38bd8dced21 (MD5) Previous issue date: 2012-07-03 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This dissertation addresses poverty as a multiple and complex phenomenon performed by a network of heterogeneous materials from contemporary public policies. To delimit these assumptions, theoretical and epistemological dialogues based on Discursive Social Psychology were articulated, addressing aspects such as the historical construction of poverty, importance of language in this construction, polysemy of meanings, and corresponding linguistic repertoires. Poverty was interpreted as a manifestation of the governmentalization of the Modern State that allowed the pursuit of a specific and complex form of government targeting the poor. Strategies for combating poverty also underwent resignifications accompanying the processes of metamorphosis and reconversion of social issues, bringing about changes in the framework of contemporary social policies, ultimately taking on the form of income transfer. To understand how the Public Policy for Combating Poverty is performed by a heterogeneous network of human and nonhuman actors through the Bolsa Família Income Allowance Program, a dialogue was articulated with selected inputs from the Actor-Network Theory and epistemological references questioning the ontological bases of truth and reality through the notions of multiplicity and performativity. Drawing on observations, interviews, conversations, and readings of public documents addressing actions of the Bolsa Família Program, three versions of "poverty" emerged: calculated, officially recorded, and controlled. These versions coexist and should not be interpreted in isolation, since taken together they would yield a joint entity or comprise a portrait of poverty that is homogeneous, stable, and permanent, understood from diverse viewpoints and perspectives. By contrast, a focus on a multiplicity of poverties is proposed in the present study. Connections between and bifurcations from versions of poverty produced by the materialities and socialities of the heterogeneous network of public policies for combating poverty are also highlighted, in a bid to destabilize, deterritorialize, and impart flexibility to the traditional notions of poor and poverty" / Esta tese apresenta a pobreza como múltipla e complexa, performada por uma rede de materiais heterogêneos nas políticas públicas contemporâneas. Para chegarmos a esses pressupostos construímos diálogos teóricos e epistemológicos com a abordagem da Psicologia Social Discursiva, tais como a construção histórica da pobreza, a importância da linguagem nessa construção, a polissemia de sentidos e seus repertórios linguísticos. Procurou-se entendê-la como manifestação de governamentalização do Estado Moderno, que permitiram o exercício de uma de forma específica e complexa de governo, que tem por alvo a população pobre. O enfrentamento à pobreza também passou por ressignificações trazidas pelos processos de metamorfose e reconversão da questão social, produzindo mudanças no marco das políticas sociais contemporâneas, assumindo o formato da transferência de renda. Para compreender como a Política Pública de Enfrentamento à Pobreza é performada por uma rede heterogênea de atores humanos e não humanos via o Programa Bolsa Família, articulou-se ainda um diálogo com algumas pontuações da Teoria Ator-rede e referenciais epistemológicos que questionam os fundamentos ontológicos de verdade e realidade por meio das noções de multiplicidade e performatividade. A partir das observações, entrevistas, conversas e leitura de documentos públicos das ações do Programa Bolsa Família, descrevemos três versões de pobrezas : a pobreza calculada, a cadastrada e a controlada. Essas versões coexistem entre si, e não devem ser entendidas de forma isoladas de tal modo que somadas produziriam um todo ou comporiam um retrato da pobreza homogênea, estável e permanente, apreendida por uma diversidade de olhares e perspectivas. Ao contrário, propomos aqui se trate de uma multiplicidade de pobrezas . Pontuamos também as conexões e bifurcações entre as versões de pobrezas produzidas pelas materialidades e socialidades da rede heterogênea das políticas públicas de enfrentamento à pobreza, como forma de desestabilizar, desterritorializar e flexibilizar as noções tradicionais de pobre e pobreza