Thèses sur le sujet « Ngôn ngữ »
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1
Strelle, Torsten. « Next Generation Network (NGN) ». Ilmenau Universitätsbibliothek Ilmenau, 2010. http://d-nb.info/1000955737/34.
Texte intégral
2
Zangheri, Filippo. « Implementazioni di reti di nuova generazione (NGN) ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amslaurea.unibo.it/1274/.
Texte intégral
3
Sareh, Said Adel Mounir. « Ubiquitous sensor network in the NGN environment ». Thesis, Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0016/document.
Texte intégralRésumé :
Ubiquitous Sensor Network (USN) est un réseau conceptuel construit sur des réseaux physiques existantes. Il se sert des données détectées et fournit des services de connaissances à quiconque, n'importe où et à tout moment, et où l'information est générée en utilisant la sensibilité au contexte. Dispositifs et USN portables intelligents émergent rapidement en offrant de nombreux services fiables facilitant la vie des gens. Ces petits terminaux et terminaux très utiles besoin d'un substrat de communication globale pour fournir un service complet de l'utilisateur final global. En 2010, ITU -T a fourni les exigences pour supporter des applications et services USN dans le Next Generation Network (NGN) de l'environnement d'exploiter les avantages du réseau de base. L'un des principaux marchés prometteurs pour l'application et les services USN est la e- santé. Il fournit le suivi des patients en continu et permet une grande amélioration dans les services médicaux. D'autre part, des Véhicules Ad-hoc NETwork (VANET) est une technologie émergente qui permet une communication intelligente entre les véhicules mobiles. Intégrer VANET avec USN a un grand potentiel pour améliorer la sécurité routière et la fluidité du trafic. La plupart des applications VANET sont appliqués en temps réel et ils sont sensibles à retarder, en particulier ceux liés à la sécurité et à la santé. Dans ce travail, nous proposons d'utiliser l'IP Multimédia Subsystem (IMS) comme une sous- couche de contrôle de service dans l'environnement USN fournir un substrat mondiale pour un service complet de bout en bout. De plus, nous vous proposons d'intégrer VANETs avec USN pour des applications et des installations riches plus, ce qui facilitera la vie des humains. Nous avons commencé à étudier les défis sur la route pour atteindre cet objectifUbiquités Sensor Network (USN) is a conceptual network built over existing physical networks. It makes use of sensed data and provides knowledge services to anyone, anywhere and at anytime, and where the information is generated by using context awareness. Smart wearable devices and USNs are emerging rapidly providing many reliable services facilitating people life. Those very useful small end terminals and devices require a global communication substrate to provide a comprehensive global end user service. In 2010, the ITU-T provided the requirements to support USN applications and services in the Next Génération Network (NGN) environment to exploit the advantages of the core network. One of the main promising markets for the USN application and services is the e-Health. It provides continuous patients’ monitoring and enables a great improvement in medical services. On the other hand, Vehicular Ad-Hoc NETwork (VANET) is an emerging technology, which provides intelligent communication between mobile vehicles. Integrating VANET with USN has a great potential to improve road safety and traffic efficiency. Most VANET applications are applied in real time and they are sensitive to delay, especially those related to safety and health. In this work, we propose to use IP Multimedia Subsystem (IMS) as a service controller sub-layer in the USN environment providing a global substrate for a comprehensive end-to-end service. Moreover, we propose to integrate VANETs with USN for more rich applications and facilities, which will ease the life of humans. We started studying the challenges on the road to achieve this goal
4
Sareh, Said Adel Mounir. « Ubiquitous sensor network in the NGN environment ». Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0016.
Texte intégralRésumé :
Ubiquitous Sensor Network (USN) est un réseau conceptuel construit sur des réseaux physiques existantes. Il se sert des données détectées et fournit des services de connaissances à quiconque, n'importe où et à tout moment, et où l'information est générée en utilisant la sensibilité au contexte. Dispositifs et USN portables intelligents émergent rapidement en offrant de nombreux services fiables facilitant la vie des gens. Ces petits terminaux et terminaux très utiles besoin d'un substrat de communication globale pour fournir un service complet de l'utilisateur final global. En 2010, ITU -T a fourni les exigences pour supporter des applications et services USN dans le Next Generation Network (NGN) de l'environnement d'exploiter les avantages du réseau de base. L'un des principaux marchés prometteurs pour l'application et les services USN est la e- santé. Il fournit le suivi des patients en continu et permet une grande amélioration dans les services médicaux. D'autre part, des Véhicules Ad-hoc NETwork (VANET) est une technologie émergente qui permet une communication intelligente entre les véhicules mobiles. Intégrer VANET avec USN a un grand potentiel pour améliorer la sécurité routière et la fluidité du trafic. La plupart des applications VANET sont appliqués en temps réel et ils sont sensibles à retarder, en particulier ceux liés à la sécurité et à la santé. Dans ce travail, nous proposons d'utiliser l'IP Multimédia Subsystem (IMS) comme une sous- couche de contrôle de service dans l'environnement USN fournir un substrat mondiale pour un service complet de bout en bout. De plus, nous vous proposons d'intégrer VANETs avec USN pour des applications et des installations riches plus, ce qui facilitera la vie des humains. Nous avons commencé à étudier les défis sur la route pour atteindre cet objectifUbiquités Sensor Network (USN) is a conceptual network built over existing physical networks. It makes use of sensed data and provides knowledge services to anyone, anywhere and at anytime, and where the information is generated by using context awareness. Smart wearable devices and USNs are emerging rapidly providing many reliable services facilitating people life. Those very useful small end terminals and devices require a global communication substrate to provide a comprehensive global end user service. In 2010, the ITU-T provided the requirements to support USN applications and services in the Next Génération Network (NGN) environment to exploit the advantages of the core network. One of the main promising markets for the USN application and services is the e-Health. It provides continuous patients’ monitoring and enables a great improvement in medical services. On the other hand, Vehicular Ad-Hoc NETwork (VANET) is an emerging technology, which provides intelligent communication between mobile vehicles. Integrating VANET with USN has a great potential to improve road safety and traffic efficiency. Most VANET applications are applied in real time and they are sensitive to delay, especially those related to safety and health. In this work, we propose to use IP Multimedia Subsystem (IMS) as a service controller sub-layer in the USN environment providing a global substrate for a comprehensive end-to-end service. Moreover, we propose to integrate VANETs with USN for more rich applications and facilities, which will ease the life of humans. We started studying the challenges on the road to achieve this goal
5
Hammami, Ali. « La sécurité des futures architectures convergentes pour des services personnalisés : aspect architectural et protocolaire ». Thesis, Paris, ENST, 2013. http://www.theses.fr/2013ENST0039/document.
Texte intégralRésumé :
L’émergence et l’évolution des réseaux de nouvelles génération (NGN) a soulevé plusieurs défis surtout en termes d’hétérogénéité, de mobilité et de sécurité. En effet, l’utilisateur est capable, dans un tel environnement, d’avoir accès à plusieurs réseaux, à travers différents terminaux, avec un choix vaste de services fournis par différents fournisseurs. De plus, les utilisateurs finaux demandent à être constamment connectés n’importe où, n’importe quand et n’importe comment. Ils désirent également avoir un accès sécurisé à leurs services à travers une session dynamique, seamless et continue selon leurs préférences et la QoS demandée. Dans ce contexte, la sécurité représente une composante majeure. Face à cette session user-centric sécurisée, plusieurs défis se posent. L’environnement est de plus en plus ouvert, de multiples services ne sont pas connus d’avance et nous avons une diversité de communications entre les services et les utilisateurs. L’hétérogénéité des ressources (terminaux, réseaux et services) impliquées dans la session de l’utilisateur accentue la complexité des tâches de sécurité. Les différentes déclinaisons de mobilité (mobilité de l’utilisateur, mobilité du terminal, mobilité du réseau et mobilité du service) modifient la session user-centric que l’on veut unique, sécurisée et seamless avec la délivrance d’un service continuThe emergence and evolution of Next Generation Networks (NGN) have raised several challenges mainly in terms of heterogeneity, mobility and security. In fact, the user is able, in such environment, to have access to many networks, via multiple devices, with a vast choice of services offered by different providers. Furthermore, end-users claim to be constantly connected anywhere, anytime and anyhow. Besides, they want to have a secure access to their services through a dynamic, seamless and continuous session according to their preferences and the desired QoS. In this context, security represents an important concern. In fact, this user-centric session should obviously be secured. However, many challenges arise. In such environment, system boundaries, which were well delimited, become increasingly open. Indeed, there are multiple services which are unknown in advance and multiple communications between services and with users. Besides, heterogeneity of involved resources (terminals, networks and services) in the user session increases the complexity of security tasks. In addition, the different types of mobility (user, terminal, network and service mobility) affect the user-centric session that should be unique, secure and seamless and ensure continuity of services
6
Томак, В. В., et Ю. М. Колтун. « Модернізація традиційних телефонних мереж з використанням концептуальних принципів NGN ». Thesis, ФОП Петров В. В, 2021. https://openarchive.nure.ua/handle/document/18669.
Texte intégralRésumé :
Метою доповіді є аналіз принципів проведення модернізації або заміни функціонуючих комутаційних вузлів ТМЗК, а також засобів доступу до них, в аспекті здійснення переходу до NGN, що дозволить забезпечити передачу всіх видів інформації.
7
Nagy, Ľuboš. « Optimalizácia rozloženia signalizačnej záťaže subsystému IMS v sietiach NGN ». Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-263404.
Texte intégralRésumé :
One of causes of increased latency service over the whole IMS network can be unbalanced SIP (Session Initiation Protocol) signalling traffic through CSCF (Call Session Control Function). This thesis is devoted to the proposal of weight-based load balancing algorithm which can be used for the S-CSCF assignment performed by I-CSCF during the initial registration procedure of subscribers over the IMS architecture. The designed mechanism is implemented and evaluated in the mathematical model of IMS subsystem based on single servers with FIFO queues with the unlimited capacity in the numerical computing environment - Matlab. Two test-cases with different performance conditions of available S-CSCFs are described. The influence of measured latency affected by performance of other nodes (e.g. P-CSCF, I-CSCF, HSS, etc.) is minimized. Each of simulated test-cases is measured with various service times of SCSCFs and inter-arrival times. The obtained results of designed algorithm are compared with well-known selection algorithm – the round-robin algorithm. It is shown that new selection mechanism improved the service latency of whole IMS network. The possible weakness of the designed weight-based algorithm is sensitivity to traffic model over the modelled IMS architecture.
8
SILVA, RODRIGO MORGADO DA. « QOS RESOURCES USED IN NGN PROTOCOLS BASED TO THE UMTS STANDARD ». PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8559@1.
Texte intégralRésumé :
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROEste trabalho aborda um estudo sobre o desempenho de uma rede de dados IP/MPLS, com a implementação dos protocolos de NGN e (Sinalização sobre IP), utilizando a arquitetura Diffserv para oferecimento de QoS. O objeto do estudo está adequado aos padrões do IETF, definidos para arquitetura de core de rede UMTS all-IP. São detalhados o conceito, a arquitetura e os fluxos de chamadas do padrão UMTS e revistos conceitos básicos dos protocolos envolvidos na solução. Para a implementação de QoS no laboratório proposto, são revistos também os principais mecanismos de controle de tráfego Diffserv. Utilizando roteadores, switch´s, emuladores de protocolos e ferramentas de gerência por classes, avalia-se o desempenho do tráfego de uma rede com a implementação de VoIP e SS7oIP. Para o cenário especificado, são estudados: classificação dos protocolos para diferentes fontes de tráfego, disciplinas de serviço, procurando-se obter medidas de desempenho que possam ser úteis em projetos de core de rede, com qualidade de serviço, que possuam as características propostas pelo IETF para o padrão UMTS.
This work approaches a study about the performance of a data network IP/MPLS, with an implementation of NGN protocols (Signaling over IP), using the DiffServ architecture to offer the QoS. The purpose of the study is suitable to the IETF standards, determined by architecture of core network UMTS all-IP. The concept, the architecture and the flux of standards call UMTS are detailed. In order to implement the QoS in the proposed laboratory, the main mechanism of traffic DiffServ control are revised too. Using routers, switch´s, network emulators and classes´ management tools, the performance of a network traffic with the implementation of VoIP and SS7oIP is evaluated. To the specific cenary, are studied the classification protocols for different traffic sources and disciplines of service, searching to get the measures of perform that can be useful in core network projects, with quality of service, that own the proposal characteristics by IETF to UMTS standard.
9
Колтун, Ю. М., et В. Л. Соболь. « Транспортування сигнальних повідомлень SS#7 в мережі NGN з використанням технології SIGTRAN ». Thesis, ФОП Петров В. В, 2020. https://openarchive.nure.ua/handle/document/16405.
Texte intégralRésumé :
У збірнику подано тези доповідей восьмої міжнародної науково-технічної конференції “Проблеми інформатизації”. Розглянуті питання за такими напрямами: інформатизація навчального процесу; безпека функціонування, застосування та експлуатація телекомунікаційних систем та мереж; комп’ютерні методи і засоби інформаційних технологій та управління; методи швидкої та достовірної обробки даних в комп’ютерних системах та мережах; сучасні інформаційновимірювальні системи; цивільна безпека (інформаційна підтримка).
10
Wu, Yijun. « «User-Centric session» et «QoS dynamique» pour une approche intégrée du NGN ». Phd thesis, Paris, Télécom ParisTech, 2010. https://pastel.hal.science/pastel-00579469.
Texte intégralRésumé :
La capacité à assurer la mobilité sans couture avec une E2E QoS sera capitale pour la réussite du NGN (Next Generation Network). Pour ce faire, les verrous à lever que nous avons relevés dans cette thèse se positionnent à l’interconnexion de trois domaines, à savoir : les mobilités, l’hétérogénéité et les préférences utilisateur. Notre première proposition d’ordres organisationnel et fonctionnel, pour laquelle nous préconisons la convergence des trois plans (user, contrôle et gestion) et les fonctionnalités associées. Ainsi nous obtenons une QoS dynamique pour satisfaire l’approche orientée «User-Centric ». Afin de mettre en œuvre la E2E QoS incluant la personnalisation dans la session «User-Centric», nous avons proposé une «Signalisation dynamique d’E2E QoS», qui est d’ordre protocolaire, sur le niveau de service afin de parvenir à la fourniture des services demandés par l’user et de se conformer au SLA. Pour couvrir tout impact de mobilité, nous avons ensuite proposé un « E2E Session Binding cross layer » au sein de notre architecture à quatre niveaux de visibilité (Equipement, Réseau, Service et User). Par le binding nous assurons la cohérence des informations entre les quatre niveaux de visibilité. Au-delà du binding, notre contribution sur la dimension informationnelle a porté sur les profils impliqués dans chaque étape du cycle de vie du service incluant les critères de QoS, les quels fournissent une image générique des composants du système de l'utilisateur et de toutes les ressources ambiantes. Finalement, nous montrons la faisabilité de nos contributions à travers des expérimentations sur notre plate-formeThe ability to provide seamless mobility with E2E QoS will be critical to the success of NGN (Next Generation Network). For this aim, the research of this thesis is positioned at the interconnection of three areas: mobility, heterogeneity and user preferences. Our first proposal is in organizational and functional levels, for which we advocate the convergence of three levels in the network (user, control and management) and associated functionality. Thus we get a dynamic QoS-oriented approach in order to satisfy the "User-Centric". For implementing the E2E QoS including personalization in the "User-Centric” session, we proposed a “dynamic E2E QoS Signalling” in the service layer. The proposal provides an end-to-end provisioning among the service components with information on four levels (equipment, access network, core network and service). Considering any impact of mobility, we proposed also a “cross layer E2E Session Binding” in our architecture for ensuring information consistency among the four levels of visibility. Meanwhile, our contribution in the informational dimension focused on the profiles involved in each stage of service life cycle including the QoS criteria, which provide a generic image of the components of the user's system and all environmental resources. Finally, we presented the feasibility of our proposals through the experiments on our platform
11
Wu, Yijun. « User-centric session et QoS dynamique pour une approche intégrée du NGN ». Phd thesis, Télécom ParisTech, 2010. http://pastel.archives-ouvertes.fr/pastel-00579469.
Texte intégralRésumé :
La capacité à assurer la mobilité sans couture avec une E2E QoS sera capitale pour la réussite du NGN (Next Generation Network). Pour ce faire, les verrous à lever que nous avons relevés dans cette thèse se positionnent à l'interconnexion de trois domaines, à savoir : les mobilités, l'hétérogénéité et les préférences utilisateur. Notre première proposition d'ordres organisationnel et fonctionnel, pour laquelle nous préconisons la convergence des trois plans (user, contrôle et gestion) et les fonctionnalités associées. Ainsi nous obtenons une QoS dynamique pour satisfaire l'approche orientée "User-Centric ". Afin de mettre en œuvre la E2E QoS incluant la personnalisation dans la session "User-Centric", nous avons proposé une "Signalisation dynamique d'E2E QoS", qui est d'ordre protocolaire, sur le niveau de service afin de parvenir à la fourniture des services demandés par l'user et de se conformer au SLA. Pour couvrir tout impact de mobilité, nous avons ensuite proposé un " cross layer E2E Session Binding" au sein de notre architecture à quatre niveaux de visibilité (Equipement, Réseau, Service et User). Par le binding nous assurons la cohérence des informations entre les quatre niveaux de visibilité. Au-delà du binding, notre contribution sur la dimension informationnelle a porté sur les profils impliqués dans chaque étape du cycle de vie du service incluant les critères de QoS, les quels fournissent une image générique des composants du système de l'utilisateur et de toutes les ressources ambiantes. Finalement, nous montrons la faisabilité de nos contributions à travers des expérimentations sur notre plate-forme.
12
Manco, Araujo Patricia Norma. « Estudio para la implementación de redes de nueva generación (NGN) en Lima-Metropolitana ». Bachelor's thesis, Pontificia Universidad Católica del Perú, 2012. http://tesis.pucp.edu.pe/repositorio/handle/123456789/1630.
Texte intégralRésumé :
El objetivo de la presente tesis es demostrar las ventajas y beneficios de la implementación
de la Red Next Generation Network (NGN) en Lima-Metropolitana. La Red NGN está basada
en una serie de plataformas y protocolos, los cuales deben trabajar de una manera
ordenada y jerárquica para el buen funcionamiento de la red y seguir ofreciendo los servicios
actuales así como nuevos servicios de redes avanzadas, todas ellas basadas en
plataformas de red IP. Se realizó un estudio mercado de los servicios ofrecidos actualmente
por los operadores, en donde se puede apreciar la cantidad de clientes por servicio y la
penetración de estos servicios a lo largo de los años 2007-2011. Seguidamente se
presentan además los servicios que se podrían ofrecer con el desarrollo de esta tecnología,
estos servicios tales como IPTV y teleconferencias, que son ofrecidos en otros países, como
México y España, por ejemplo.
La Ingeniería del proyecto propone la ubicación de puntos de presencia (PoP) en áreas
estratégicas, de tal manera que se atienda las necesidades de los usuarios. Se propone
además el tipo de topología a usar así como los elementos de red necesarios para su
puesta en servicio.
Finalmente se realiza el análisis financiero de los servicios ofrecidos en el sector de
telecomunicaciones del mercado de Lima – Metropolitana, basando el estudio en valores
obtenidos de los indicadores estadísticos del Regulador Osiptel, permitiendo demostrar la
rentabilidad de la implementación de la red propuesta en la presente tesis.Tesis
13
Tavares, Sidney Dias. « Análise qualitativa de infraestrutura para uma central de atendimento de nova geração – NGN ». reponame:Repositório Institucional da UnB, 2010. http://repositorio.unb.br/handle/10482/8591.
Texte intégralRésumé :
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2010.Submitted by Luiza Moreira Camargo (luizaamc@gmail.com) on 2011-06-21T19:22:19Z No. of bitstreams: 1 2010_SidneyDiasTavares.pdf: 2640225 bytes, checksum: 26135d27a8491fbe2e0e13e1195c532f (MD5)
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É possível utilizar a infra-estrutura da NGN com Servidor de Aplicação como Distribuidor Automático de Chamadas (DAC) e Servidores de Mídia como Unidade de Resposta Audível (URA) para substituir uma infraestrutura tradicional de Central de Atendimento com DAC e URAs TDM ? A maior parte das Centrais de Atendimento ( plataformas de “Call Center” ) existentes na planta da Brasil Telecom logo após a privatização eram resultado de aquisições realizadas pelas diversas Empresas do grupo Telebrás, ocasionando uma grande diversidade de tecnologias, portes e localização física das plataformas. Após a privatização das operadoras de telecomunicações, a Brasil Telecom com o objetivo obter uma nova visão centralizada e de holding, determinou uma ação em busca de uma centralização, racionalização e realocação das Centrais de Atendimento herdadas das Empresas anteriores. O principal objetivo na época era a padronização Centrais de Atendimento e obter ganhos de escala pela centralização do atendimento. Ao longo do tempo poucas ações foram tomadas no sentido de organizar o uso e aplicação das plataformas de atendimento, em especial no que diz respeito as tecnologias existentes, resultando em uma diversidade de condições, que vem impedindo um melhor uso desses recursos. Para se atingir as metas de melhoria produtividade e de redução de custos operacionais ações isoladas foram adotadas, porém sem considerar uma visão global da utilização do conjunto de plataformas existentes. Neste sentido o objetivo desta dissertação é realizar uma análise das mais recentes tecnologias de plataformas voltadas para atendimento à clientes verificar se ocorreram reduções de custos nas centrais de atendimento obtidas com a implantação de novas tecnologias IP convergentes. Além disso, este trabalho apresenta alguns estudos de caso de utilização de infraestrutura NGN associadas ao DAC como Servidor de Aplicação e as URAs IP como Servidores de Mídia em substituição de uma estrutura tradicional com DAC e URAs TDM. _______________________________________________________________________________ ABSTRACT
You can use the infrastructure of the NGN with Application Servers such as Automatic Call Distributor (ACD) and Media Servers as IVR (IVR) infrastructure to replace a traditional Call Center ACD and IVR with TDM? Most Service Centers (platforms "Call Center") on the plant in Brazil Telecom after privatization were the result of acquisitions made by various Group companies Telebras, causing a variety of technologies, sizes and physical location of platforms. After the privatization of telecom operators, the Brazil Telecom in order to obtain a new vision of centralized holding and determined action in search of centralization, rationalization and relocation of Central Support Services inherited from previous companies. The main objective then was to standardize Service Centers and obtain economies of scale through centralization of care. Over time, few actions have been taken to organize the use and implementation of service platforms, in particular as regards the existing technologies, resulting in a variety of conditions, which has prevented the best use of resources. To achieve the goals of improving productivity and reducing operating costs isolated actions were taken, but without considering an overview of the use of all the existing platforms. In this sense the goal of this dissertation is an analysis of the latest platform technologies focused on customer service to see if there were cost savings in call centers obtained with the deployment of new converged IP technologies. In addition, this paper presents some case studies of use of NGN infrastructure associated with the ACD as Application Server and IP IVR as Media Server to replace a traditional structure with ACD and TDM IVRs.
14
Weber, Frank Gerd. « Quality of Service optimisation framework for Next Generation Networks ». Thesis, University of Plymouth, 2012. http://hdl.handle.net/10026.1/1199.
Texte intégralRésumé :
Within recent years, the concept of Next Generation Networks (NGN) has become widely accepted within the telecommunication area, in parallel with the migration of telecommunication networks from traditional circuit-switched technologies such as ISDN (Integrated Services Digital Network) towards packet-switched NGN. In this context, SIP (Session Initiation Protocol), originally developed for Internet use only, has emerged as the major signalling protocol for multimedia sessions in IP (Internet Protocol) based NGN. One of the traditional limitations of IP when faced with the challenges of real-time communications is the lack of quality support at the network layer. In line with NGN specification work, international standardisation bodies have defined a sophisticated QoS (Quality of Service) architecture for NGN, controlling IP transport resources and conventional IP QoS mechanisms through centralised higher layer network elements via cross-layer signalling. Being able to centrally control QoS conditions for any media session in NGN without the imperative of a cross-layer approach would result in a feasible and less complex NGN architecture. Especially the demand for additional network elements would be decreased, resulting in the reduction of system and operational costs in both, service and transport infrastructure. This thesis proposes a novel framework for QoS optimisation for media sessions in SIP-based NGN without the need for cross-layer signalling. One key contribution of the framework is the approach to identify and logically group media sessions that encounter similar QoS conditions, which is performed by applying pattern recognition and clustering techniques. Based on this novel methodology, the framework provides functions and mechanisms for comprehensive resource-saving QoS estimation, adaptation of QoS conditions, and support of Call Admission Control. The framework can be integrated with any arbitrary SIP-IP-based real-time communication infrastructure, since it does not require access to any particular QoS control or monitoring functionalities provided within the IP transport network. The proposed framework concept has been deployed and validated in a prototypical simulation environment. Simulation results show MOS (Mean Opinion Score) improvement rates between 53 and 66 percent without any active control of transport network resources. Overall, the proposed framework comes as an effective concept for central controlled QoS optimisation in NGN without the need for cross-layer signalling. As such, by either being run stand-alone or combined with conventional QoS control mechanisms, the framework provides a comprehensive basis for both the reduction of complexity and mitigation of issues coming along with QoS provision in NGN.
15
Wu, Hao, et Zhangdui Zhong. « A SECURE MEDIA STREAM COMMUNICATION FOR NEXT GENERATION NETWORK ». International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604879.
Texte intégralRésumé :
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, NevadaIn NGN, the open interfaces and the IP protocol make the hazard of security aspect increased accordingly. Thereby, it is a very important premise for NGN network operation to afford a good secure media stream communication. In this paper, we will present a secure media stream communication for NGN. Then we will discuss the three parts of the media stream secure communication——media stream source authentication, secret key negotiation and distribution; media stream encryption/decryption in detail. It can effectively realize media stream end-to-end secure communication. Meanwhile, it also makes use of the expanding of former protocol during the secret key negotiation process.
16
Alaoui, Soulimani Houda. « Pilotage dynamique de la qualité de service de bout en bout pour une session "user-centric" ». Phd thesis, Télécom ParisTech, 2012. http://pastel.archives-ouvertes.fr/pastel-00834199.
Texte intégralRésumé :
Aujourd'hui, le marché des services est devenu de plus en plus concurrentiel. Les exigences des clients pour des offres de service en adéquation avec leurs usages et leurs préférences conduisent les fournisseurs à proposer de nouveaux services qui répondent à ce nouveau besoin pour se démarquer des concurrents et attirer de nouveaux clients. Avec la convergence des réseaux et celle des services de nouvelle génération (NGN/NGS), de nouveaux services sont apparus. Les utilisateurs sont nomades et veulent utiliser leurs services de différentes manières n'importe où, n'importe quand et par n'importe quel type de terminal, et cela avec une continuité de service et une qualité de service de bout en bout. Ainsi, fournir des services personnalisés aux clients dans un environnement hétérogène et mobile devient un challenge pour les opérateurs et les fournisseurs de service pour améliorer le retour sur investissement (ROI) et le délai de mise sur le marché (TTM). Nos réflexions à propos de la fourniture des services personnalisés selon les besoins fonctionnels et non-fonctionnels (QoS) des usagers, nous ont conduits à identifier les besoins du nouveau contexte NGN/NGS défini par l'intersection de ces trois éléments "user-centric, mobilité et QoS". Comment piloter dynamiquement la QoS de bout en bout pour une session unique "user-centric"? Comment assurer le " service Delivery" dans un contexte de mobilité et d'ubiquité? Ces nouveaux besoins, nous ont motivé à proposer des solutions à travers trois contributions principales qui prennent en considération la vision utilisateur et opérateur. Notre première contribution porte sur le modèle organisationnel. Nous proposons une nouvelle organisation avec un maximum de flexibilité, d'adaptabilité et d'autogestion, qui permet de piloter la QoS à chaque niveau de l'architecture (équipement, réseau et service). Dans cette organisation nous avons défini des acteurs et le rôle que joue chacun d'eux par rapport à la prise de décision au cours de la session de l'utilisateur, et cela pour maintenir la QoS de bout en bout dans un environnement qui est totalement hétérogène et mobile.Notre deuxième contribution traite du composant de service autonomique. Avec la complexité de la personnalisation des services dans un contexte hétérogène et mobile et le besoin de satisfaire la QoS de bout en bout, les ressources services doivent être prises en compte au même titre que les ressources réseaux. Donc, un degré élevé d'autosuffisance, d'autogestion et d'automatisation est demandé dans la ressource service (composant de service) pour améliorer le service delivery. Pour cela, nous proposons un composant de service autonomique "ASC: Autonomic Service Component" basé sur un agent de QoS intégré qui s'autocontrôle et s'autogère pour adapter dynamiquement ses ressources en réponse à un changement de situations au cours de la session de l'utilisateur. Notre troisième proposition couvre le modèle protocolaire. La session de services personnalisés nécessite des interactions plus flexibles au niveau service pour avoir une session unique avec une continuité de service. Nous proposons un protocole de signalisation SIP+ qui permet la négociation de la QOS des services personnalisés dès la phase d'initialisation de la session et de la renégociation de la QoS pendant l'usage, pour maintenir le service avec la QoS requise à travers une session unique.De façon plus concrète, nous présentons nos expérimentations à travers un scenario et une plate-forme de démonstration qui nous permet de tester la faisabilité et la performance de nos contributions. Les apports et les perspectives de cette thèse sont consignés en conclusion.
17
Malila, Bessie. « Implementation and Performance Evaluation of an NGN prototype using WiMax as an Access Technology ». Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/14363.
Texte intégralRésumé :
Telecommunications networks have evolved to IP-based networks, commonly known as Next Generation Networks (NGN). The biggest challenge in providing high quality realtime multimedia applications is achieving a Quality of Service (QoS) consistent with user expectations. One of the key additional factors affecting QoS is the existence of different QoS mechanisms on the heterogeneous technologies used on NGN platforms. This research investigates the techniques used to achieve consistent QoS on network technologies that use different QoS techniques. Numerous proposals for solving the end-to-end QoS problem in IP networks have adopted policy-based management, use of signalling protocols for communicating applications QoS requirements across different Network Elements and QoS provisioning in Network Elements. Such solutions are dependent on the use of traffic classification and knowledge of the QoS requirements of applications and services on the networks. This research identifies the practical difficulties involved in meeting the QoS requirements of network traffic between WiMax and an IP core network. In the work, a solution based on the concept of class-of-service mapping is proposed. In the proposed solution, QoS is implemented on the two networks and the concept of class-of-service mapping is used to integrate the two QoS systems. This essentially provides consistent QoS to applications as they traverse the two network domains and hence meet end-user QoS expectations. The work is evaluated through a NGN prototype to determine the capabilities of the networks to deliver real-time media that meets user expectations.
18
Umair, Muhammad. « Performance Evaluation and Elastic Scaling of an IP Multimedia Subsystem Implemented in a Cloud ». Thesis, KTH, Radio Systems Laboratory (RS Lab), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124578.
Texte intégralRésumé :
Network (NGN) technology which enables telecommunication operators to provide multimedia services over fixed and mobile networks. All of the IMS infrastructure protocols work over IP which makes IMS easy to deploy on a cloud platform. The purpose of this thesis is to analysis a novel technique of “cloudifying” the OpenIMS core infrastructure. The primary goal of running OpenIMS in the cloud is to enable a highly available and horizontally scalable Home Subscriber Server (HSS). The resulting database should offer high availability, and high scalability. The prototype developed in this thesis project demonstrates a virtualized OpenIMS core with an integrated horizontal scalable HSS. Functional and performance measurements of the system under test (i.e. the virtualized OpenIMS core with horizontally scalable HSS) were conducted. The results of this testing include an analysis of benchmarking scenarios, the CPU utilization, and the available memory of the virtual machines. Based on these results we conclude that it is both feasible and desirable to deploy the OpenIMS core in a cloud.IP Multimedia Subsystem (IMS) ramverk är ett Next Generation Network (NGN) teknik som möjliggör teleoperatörer att erbjuda multimediatjänster via fasta och mobila nät. Alla IMS infrastruktur protokollen fungera över IP som gör IMS lätt att distribuera på ett moln plattform. Syftet med denna uppsats är att analysera en ny teknik för “cloudifying” den OpenIMS kärninfrastrukturen. Det primära målet med att köra OpenIMS i molnet är att möjliggöra en hög tillgänglighet och horisontellt skalbara Server Home Subscriber (HSS). Den resulterande databasen bör erbjuda hög tillgänglighet och hög skalbarhet. Prototypen utvecklas i detta examensarbete visar en virtualiserad OpenIMS kärna med en integrerad horisontell skalbar HSS. Funktionella och prestanda mätningar av systemet under test (dvs. virtualiserade OpenIMS kärnan med horisontellt skalbara HSS) genomfördes. Resultaten av detta test inkluderar en analys av benchmarking scenarier, CPU-användning, och tillgängligt minne för de virtuella maskinerna. Baserat på dessa resultat drar vi slutsatsen att det är både möjligt och önskvärt att distribuera OpenIMS kärnan i ett moln.
19
Alphand, Olivier. « Architecture à qualité de service pour systèmes satellites DVB-S/RCS dans un contexte NGN ». Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2005. http://tel.archives-ouvertes.fr/tel-00011402.
Texte intégralRésumé :
L'objet de cette thèse est de doter les réseaux satellites d'accès géostationnaires d'une architecture de QoS compatible avec l'infrastructure NGN (Next Generation Network) qui entend réaliser la convergence des réseaux et services de communication existants et à venir. Dans une première étape, nous établissons un modèle de QoS NGN s'inspirant principalement de l'évolution des architectures de QoS dans les réseaux IP. Dans une deuxième étape, nous démontrons que les réseaux satellites ne disposent pas, en l'état actuel, d'une architecture de QoS suffisamment mature pour assurer un accès large bande aux futurs services IP multimédias. Afin d'y remédier, nous spécifions une architecture de QoS NGN unifiée assurant une étroite collaboration entre les mécanismes de QoS déployés à différents niveaux de communication (Application, Session, Réseau et MAC). Elle assure à la fois une différenciation de la QoS adaptée aux besoins des différentes classes d'applications au niveau IP tout en optimisant l'utilisation des ressources satellites via des mécanismes de bande passante à la demande au niveau MAC. Deux solutions applicatives assurant la corrélation dynamique entre les applications et les services réseaux différenciés sont également spécifiées et implémentées. Enfin un émulateur satellite de niveau réseau a été implémenté et nous a permis d'évaluer les garanties de QoS offertes par notre architecture et de valider leur conformité avec les besoins d'applications multimédias réelles.
20
García, Girón Giancarlo. « Propuesta de migración de la red NGN de una operadora implementada en IP hacia MPLS ». Bachelor's thesis, Pontificia Universidad Católica del Perú, 2009. http://tesis.pucp.edu.pe/repositorio/handle/123456789/1063.
Texte intégralRésumé :
La presente Tesis consiste en brindar una propuesta técnica para la migración del core de la
red NGN de una operadora implementada en IP hacia IP/MPLS. Durante el desarrollo de este
proyecto se presenta el marco teórico de las redes NGN y se realiza la comparación entre las
tecnologías IP y MPLS con el objetivo de observar las ventajas que presenta MPLS al brindar
QoS.
Luego, se presenta la Propuesta de migración en la cual se presenta el escenario inicial así
como los aspectos técnicos, plan de trabajo y el escenario final de la migración.
Por último, se detallan las conclusiones obtenidas al final de este proyecto, recomendaciones
y trabajos futuros.Tesis
21
Alphand, Olivier Diaz Michel. « Architecture à qualité de service pour systèmes satellites DVB-S/RCS dans un contexte NGN ». Toulouse : INP Toulouse, 2006. http://ethesis.inp-toulouse.fr/archive/00000231.
Texte intégral
22
Hammami, Ali. « La sécurité des futures architectures convergentes pour des services personnalisés : aspect architectural et protocolaire ». Electronic Thesis or Diss., Paris, ENST, 2013. http://www.theses.fr/2013ENST0039.
Texte intégralRésumé :
L’émergence et l’évolution des réseaux de nouvelles génération (NGN) a soulevé plusieurs défis surtout en termes d’hétérogénéité, de mobilité et de sécurité. En effet, l’utilisateur est capable, dans un tel environnement, d’avoir accès à plusieurs réseaux, à travers différents terminaux, avec un choix vaste de services fournis par différents fournisseurs. De plus, les utilisateurs finaux demandent à être constamment connectés n’importe où, n’importe quand et n’importe comment. Ils désirent également avoir un accès sécurisé à leurs services à travers une session dynamique, seamless et continue selon leurs préférences et la QoS demandée. Dans ce contexte, la sécurité représente une composante majeure. Face à cette session user-centric sécurisée, plusieurs défis se posent. L’environnement est de plus en plus ouvert, de multiples services ne sont pas connus d’avance et nous avons une diversité de communications entre les services et les utilisateurs. L’hétérogénéité des ressources (terminaux, réseaux et services) impliquées dans la session de l’utilisateur accentue la complexité des tâches de sécurité. Les différentes déclinaisons de mobilité (mobilité de l’utilisateur, mobilité du terminal, mobilité du réseau et mobilité du service) modifient la session user-centric que l’on veut unique, sécurisée et seamless avec la délivrance d’un service continuThe emergence and evolution of Next Generation Networks (NGN) have raised several challenges mainly in terms of heterogeneity, mobility and security. In fact, the user is able, in such environment, to have access to many networks, via multiple devices, with a vast choice of services offered by different providers. Furthermore, end-users claim to be constantly connected anywhere, anytime and anyhow. Besides, they want to have a secure access to their services through a dynamic, seamless and continuous session according to their preferences and the desired QoS. In this context, security represents an important concern. In fact, this user-centric session should obviously be secured. However, many challenges arise. In such environment, system boundaries, which were well delimited, become increasingly open. Indeed, there are multiple services which are unknown in advance and multiple communications between services and with users. Besides, heterogeneity of involved resources (terminals, networks and services) in the user session increases the complexity of security tasks. In addition, the different types of mobility (user, terminal, network and service mobility) affect the user-centric session that should be unique, secure and seamless and ensure continuity of services
23
Albini, Gabriele Luigi Aldo. « "An Analysis of the European Telecommunications Strategic Environment : How Can Strategic Actions Be Defined to Adapt to the New Scenario ? A Telefónica Case Study" ». Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124576.
Texte intégralRésumé :
This research presents an analysis of the European Telecommunication strategic environment with particular focus on the three macro-changes which have been influencing the recent history of such industry. These are, first of all, the shift from a government-controlled market to a privatized market. Second, the introduction of price limitations - called Eurotariff - which are supposed to regulate the mobile traffic throughout Europe. Finally, the constant growth of data and internet traffic demand, compared to the voice traffic demand, mainly due to the success of OTTs (Over-the-Tops) and the introduction of NGN (Next-Generation Network) applications and software. Such changes have increased the competition in an industry which was organized in monopolies and are forcing the companies to change, following the different customers' needs. Throughout the essay, a case study about Telefónica has been developed: after a presentation of the company and of Telefónica's deregulation process, the consequences of the environment analysis will be defined and, finally, some strategic actions will be proposed in order to adapt to the new strategic environment. The methodology which has been followed consists in a research on the models existing in literature designed to analyze the strategic environment. The best ones have been used and applied to the real case, involving Telefónica: the findings obtained have then been considered the basis to define the strategic actions. The purpose of the paper is twofold: first of all to offer an understanding of the telecommunications business with a particular focus on the Eurotariff, OTTs and NGN phenomena; second to show how a strategic environment can be effectively studied, focusing on the changes that characterize the industry, and how the consequences can be deduced. The information coming from this type of studies is very important for a company to understand what to change in order to adapt to a new context and achieve better performances.
24
Culverhouse, Mark. « User-centric quality of service provisioning in IP networks ». Thesis, University of Plymouth, 2012. http://hdl.handle.net/10026.1/1233.
Texte intégralRésumé :
The Internet has become the preferred transport medium for almost every type of communication, continuing to grow, both in terms of the number of users and delivered services. Efforts have been made to ensure that time sensitive applications receive sufficient resources and subsequently receive an acceptable Quality of Service (QoS). However, typical Internet users no longer use a single service at a given point in time, as they are instead engaged in a multimedia-rich experience, comprising of many different concurrent services. Given the scalability problems raised by the diversity of the users and traffic, in conjunction with their increasing expectations, the task of QoS provisioning can no longer be approached from the perspective of providing priority to specific traffic types over coexisting services; either through explicit resource reservation, or traffic classification using static policies, as is the case with the current approach to QoS provisioning, Differentiated Services (Diffserv). This current use of static resource allocation and traffic shaping methods reveals a distinct lack of synergy between current QoS practices and user activities, thus highlighting a need for a QoS solution reflecting the user services. The aim of this thesis is to investigate and propose a novel QoS architecture, which considers the activities of the user and manages resources from a user-centric perspective. The research begins with a comprehensive examination of existing QoS technologies and mechanisms, arguing that current QoS practises are too static in their configuration and typically give priority to specific individual services rather than considering the user experience. The analysis also reveals the potential threat that unresponsive application traffic presents to coexisting Internet services and QoS efforts, and introduces the requirement for a balance between application QoS and fairness. This thesis proposes a novel architecture, the Congestion Aware Packet Scheduler (CAPS), which manages and controls traffic at the point of service aggregation, in order to optimise the overall QoS of the user experience. The CAPS architecture, in contrast to traditional QoS alternatives, places no predetermined precedence on a specific traffic; instead, it adapts QoS policies to each individual’s Internet traffic profile and dynamically controls the ratio of user services to maintain an optimised QoS experience. The rationale behind this approach was to enable a QoS optimised experience to each Internet user and not just those using preferred services. Furthermore, unresponsive bandwidth intensive applications, such as Peer-to-Peer, are managed fairly while minimising their impact on coexisting services. The CAPS architecture has been validated through extensive simulations with the topologies used replicating the complexity and scale of real-network ISP infrastructures. The results show that for a number of different user-traffic profiles, the proposed approach achieves an improved aggregate QoS for each user when compared with Best effort Internet, Traditional Diffserv and Weighted-RED configurations. Furthermore, the results demonstrate that the proposed architecture not only provides an optimised QoS to the user, irrespective of their traffic profile, but through the avoidance of static resource allocation, can adapt with the Internet user as their use of services change.
25
Peña, Zamudio Paulina Natalia. « Estudio de Arquitecturas para la Convergencia de Telefonía Fija-Móvil ». Tesis, Universidad de Chile, 2007. http://repositorio.uchile.cl/handle/2250/104540.
Texte intégralRésumé :
El acelerado desarrollo de las tecnologías en telecomunicaciones tanto de telefonía fija y
móvil como de las redes de datos, junto con el surgimiento de nuevas tecnologías de acceso
para proveer distintos servicios han abierto las puertas a nuevos problemas y oportunidades
a las empresas. Mientras por un lado, la amplia gama de tecnologías ha permitido un mayor
número de servicios y de penetración en los distintos estratos y nichos de usuarios, por otro
lado, la interoperabilidad entre distintas redes se ha vuelto un problema no menor.
Desde hace algún tiempo se están viviendo una serie de cambios dentro de las redes de
los operadores de telecomunicaciones: ya no basta que una empresa de telefonía ofrezca
sólo servicios de telefonía e Internet, o que las empresas distribuidoras de televisión por
cable ofrezcan sólo servicios de televisión, sino que todas las redes de telecomunicaciones
se están orientando y evolucionando a brindar un amplio espectro de servicios. Este
fenómeno se conoce como convergencia de redes o FMC (Fixed Mobile Convergence). El
concepto de convergencia fija-móvil se enfoca a la provisión de servicios desde cualquier
tipo de terminal y sin importar la red de acceso utilizada. Para eso es necesario hacer que
todos los tipos de redes de telecomunicaciones interactúen entre sí, de forma de orientarlas
a los servicios y aplicaciones sin importar la naturaleza del acceso utilizado por el usuario.
Surgen así conceptos como el de NGN (Next Generation Network) para lograr este objetivo
y nuevas arquitecturas integradoras como lo son IMS (IP Multimedia Subsystem).
En este trabajo se presenta un estudio de las principales arquitecturas actuales de
telefonía tanto fijas como móviles, donde se contempla la telefonía fija tradicional, celular
e IP. Dentro de este estudio se examinan sus componentes funcionales, protocolos e
interfaces con la finalidad de plantear y estudiar las arquitecturas y componentes necesarias
para que estas redes sean interoperables, planteando una arquitectura convergente y
orientada a servicios.
Se expone como resultado principalmente un estudio de la arquitectura IMS como
una opción factible para lograr la convergencia, mostrando sus principales entidades
y procedimientos de interoperación con otras redes. Además, como un aporte a las
tecnologías de acceso inalámbricas emergentes en servicios de redes se plantea una
arquitectura con WiMAX como tecnología de acceso y se comparan sus ventajas y
desventajas en relación a otras tecnologías de acceso a las redes de telecomunicaciones.
La descripción detallada tanto de las componentes de IMS como paraguas de la
convergencia como de los procedimientos de interoperación entre esta arquitectura y
diferentes redes de acceso da pie para el desarrollo de nuevas memorias relativas a este
tema, como por ejemplo la implementación de una arquitectura convergente a nivel docente
basada en IMS utilizando tecnologías de acceso de interés en la actualidad, como lo son
las tecnologías inalámbricas y en particular WiMAX. Las futuras investigaciones y trabajos
de desarrollo basados en la convergencia de redes son de gran importancia en la formación
de ingenieros útiles y valiosos para el mercado de hoy en día.
26
Lopes, Roberto Rigolin Ferreira. « Uma abordagem ciente de contexto e embasada por feedbacks para o gerenciamento de handovers em ambientes NGN ». Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-05092012-143719/.
Texte intégralRésumé :
A evolução da computação móvel melhora a capacidade de comunicação e colaboração das pessoas. Os principais pilares desta transformação são: o desenvolvimento e produção de dispositivos móveis com capacidade multimídia e equipados com duas ou mais interfaces de rede, a disponibilidade de conectividade sem fio ubíqua e a popularização de aplicações sociais online. As redes sociais online merecem destaque pelas funcionalidades que permitem a criação e compartilhamento de conteúdo digital dentro de círculos sociais, também chamado de mídia social. Serviços na web anexam a localização geográfica do dispositivo ao conteúdo digital, criando as chamadas mídias sociais baseadas em localização. Equipadas com seus telefones e tablets, as pessoas estão criando e consumindo mídias sociais em qualquer lugar. Entretanto, é um desafio manter tais dispositivos móveis conectados nos ambientes de rede sem fio atuais e de próxima geração e.g., múltiplos provedores de acesso e múltiplas tecnologias de comunicação. Pesquisas recentes propõem componentes para o gerenciamento de conectividade sem fio que fazem uso simultâneo do contexto de conectividade atual e de um conjunto destes dados coletados no passado. Tais componentes são preditores de mobilidade, mecanismos de handover ou gerenciadores de mobilidade que utilizam dados de contexto de conectividade de forma particular para atingir seus propósitos. Na presente investigação, propomos uma metodologia que orquestra os principais componentes de gerenciamento de conectividade em um laço retro alimentado. Argumentamos que a coleta de dados de contexto de conectividade pode ser projetada como um sistema de sensoreamento, cujo sensores são as interfaces de rede sem fio. Como parte deste sistema de sensoriamento, os círculos sociais podem assistir o gerenciamento de conectividade compartilhando dados de contexto de conectividade. A ideia central é utilizar serviços baseados em localização para compartilhar dados de contexto de conectividade dentro dos círculos sociais. Desta forma, as redes sociais online adicionam escala para o sistema e permite colaboração em volta de dados de contexto recentes, locais, personalizados e sociais. O objetivo é melhorar experiências de conectividade sem fio e.g., métricas de QoS (Quality of Service) como: vazão, latência e qualidade do sinal. Relatamos como os dados de contexto de conectividade são manipulados com um modelo baseado em grafos e métricas como: intensidade do vértice e grau centralidade. Com isso, identificamos áreas com alta densidade de handovers, definimos a reputação dos usuários e revelamos a cobertura das redes. Resultados de experimentos mostram que a colaboração pode melhorar métricas de QoS de ~18 a ~30% se comparado ao uso de um preditor de mobilidade ou um sistema operacional moderno, respectivamente. Esta discussão se desdobra com foco na viabilidade da solução em termos de sobrecarga de armazenamento e consumo de energia. Os promissores resultados experimentais indicam que nossa solução pode melhorar experiências de conectividade sem fio de usuários móveisThe evolution of mobile computing improves communication and collaboration among people. The main pillars of this transformation are: the development and production of mobile devices with multimedia capabilities and equipped with two or more network interfaces, the availability of ubiquitous wireless connectivity and the popularity of online social applications. Online social networks noteworthy features that allow for the creation and sharing of digital content within social circles, also called textit Social Media. Web Services attach the geographic location of the device to the digital content, creating the so-called textit location-based social media. Equipped with their phones and tablets, people are creating and consuming social media anywhere. However, it is a challenge to keep such mobile devices connected in current and next generation wireless network environments textit e.g., multiple ISPs (Internet Service Provider) and multiple communication technologies. Recent researches proposes components for managing wireless connectivity that make simultaneous use of the current and past connectivity context data. Such components are mobility predictors, handovers mechanisms or mobility managers that use connectivity context data in a particular way to achieve its purposes. In this research, we propose feasiable a methodology that orchestrates the main components of the connectivity management in a feedback loop. We argue that the process of gathering connectivity context data can be designed as a sensing system, whose sensors are wireless network interfaces. As part of this sensing system, the social circles may assist the management of connectivity by sharing connectivity context data. The main idea is to use location-based services to share connectivity context data within social circles. Thus, online social networks add scale to the system and enables collaboration around recent, local, and social context data. The goal is to enhance wireless connectivity experiences in terms of QoS ( textit Quality of Service) metrics textit e.g., throughput, latency and signal quality. We report how this data is handled using complex networks metrics e.g., vertexs strength and centrality degree, to identify high density handover areas, define the mobile users reputation and to reveal the networks coverage. Real experiments showed that collaboration can improve QoS metrics from ~18 to ~30% if compared to just use a mobility predictor or a modern operational system, respectively. The discussion unfolds with focus on the collaborations efficiency as function of time, number of users, discovered area size and mobility patterns. The promising experimental results indicate that our solution can enhance mobile users wireless connectivity experiences
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Augusto, Mario Ezequiel. « Acessos sob demanda em NGN : impactos das trocas dinâmicas entre provedores Wi-Fi para o usuário móvel ». Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-27032013-163511/.
Texte intégralRésumé :
Atualmente tem crescido o uso de aparelhos móveis com mais de uma interface de rede para o acesso à Internet, caracterizando em parte as Redes de Próxima Geração (NGN). Outras características da NGN são o acesso sob demanda, no qual o cliente de acesso não seria, necessariamente, usuário de um único provedor e usaria a rede de outros provedores conforme a necessidade, e o gerenciamento de handover (trocas de rede) centrado no usuário, no qual o usuário é quem decide à qual rede vai se conectar e em que momento. Existem algumas implicações relacionadas ao acesso sob demanda que podem melhorar ou piorar a experiência de acesso do usuário e causar certos impactos relacionados à vazão recebida, valor gasto, número de handovers, entre outros. Para o dispositivo móvel gerenciar os handovers, ele precisa obter informações sobre as redes disponíveis como, por exemplo, preço e incentivos, além das informações já obtidas atualmente como força do sinal recebido e identificador do provedor (SSID). Porém, os provedores não possuem um sistema automatizado para fornecer tais informações aos dispositivos móveis. Esta tese apresenta uma avaliação dos impactos das trocas dinâmicas entre provedores Wi-Fi para o usuário móvel, comparando o acesso sob demanda com o acesso tradicional (como é feito atualmente). Como metodologia para esta avaliação, foram realizadas simulações de redes em um cenário com provedores Wi-Fi com perfis diferentes, nas quais foram analisados o número de handovers realizados, a quantidade de bytes recebidos e o valor gasto com o acesso. Nestas simulações o usuário pôde priorizar o custo da conexão, a força do sinal recebido e a carga de trabalho no ponto de acesso para decidir a troca de rede. Esta tese também apresenta uma arquitetura para provimento de informações adicionais sobre as redes disponíveis em um ambiente de acesso sob demanda com gerenciamento de handover centrado no usuário, chamada MYHand (MIH-based and Y-Comm-based Handover Management). Para isso foi utilizada a arquitetura para acesso sob demanda chamada Y-Comm e o padrão IEEE 802.21 (MIH Media Independent Handover). Os resultados desta tese contribuem no gerenciamento das trocas de rede e ubiquidade do acesso à Internet em NGN. A arquitetura MYHand auxiliará o dispositivo móvel a obter mais informações necessárias à decisão de handover, podendo otimizá-la. Com os resultados das simulações, o dispositivo móvel poderá prever o quanto determinada decisão poderá beneficiar a experiência do usuário em termos de qualidade da conexão e custoCurrently, the usage of mobile devices with multiple network interfaces for Internet access has been growing, characterizing partially the Next Generation Networks (NGN). Other features of the NGN are access on demand, in which the customer is not, necessarily, user of a single provider and would use the network of other providers as needed, and the user-centric handover management, in which the user decides which network to connect to and at which time. There are some implications related to access on demand which can improve or worsen the user access experience and cause some impacts related to throughput, paid value, number of handovers, among others. The mobile can manage the handovers but he needs to obtain information about available networks as, for example, price and incentives, in addition to the information already obtained currently as received signal strength and provider identifier (SSID). However, providers do not have an automated system to provide such information to mobile devices. This thesis presents an evaluation of the impacts of dynamic switching between Wi-Fi providers for the mobile user, comparing access on demand to the traditional approach (as currently done). As methodology for this evaluation, simulations were performed in a scenario with Wi-Fi providers with different profiles, in which the number of handovers performed, the amount of received bytes, and the paid value were analyzed. In these simulations the mobile user could prioritize the cost of the connection, the received signal strength, and the load on the access point to decide the handover. This thesis also presents an architecture for additional information provisioning about available networks in an access on demand environment with user-centric handover management, called MYHand (MIH-based and Y-Comm-based Handover Management). For this purpose, an architecture for access on demand called Y-Comm and the IEEE 802.21 standard (MIH Media Independent Handover) were used. The results of this thesis contribute to the handover management and ubiquity of Internet access in NGN. The MYHand architecture will assist the mobile device to obtain more information, necessary to the handover decision, optimizing it. With the results of the simulations, the mobile device can predict how much a particular decision may benefit the user experience in terms of connection quality and cost
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Campacci, Rodrigo Bellotto. « Handover vertical em redes NGN : integrando a sinalização do domínio de comutação de circuitos e o IMS ». Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-15092008-152814/.
Texte intégralRésumé :
Este trabalho visa estudar e implementar a integração entre o domínio de comutação de circuitos e o IP Multimedia Subsystem (IMS) para suportar handovers verticais, ou seja, entre redes de acesso distintas, por exemplo, Global System for Mobile communications (GSM) e WiFi, em especial no Serviço Voice Call Continuity (VCC). Entretanto muito pouco é especificado sobre a integração entre os domínios nas normas das diversas entidades de padronização que tratam sobre o assunto. Assim, apresenta-se uma proposta para essa integração, criando-se uma nova entidade funcional para realizá-la, o Call Data Storage Function (CDSF), que interage com os demais módulos do Serviço VCC e garante que algumas informações que devem ser trocadas entre os módulos não sejam perdidas, devido à conversão de protocolos de sinalização na interface entre tais domínios. O CDSF auxilia também no controle da alocação de endereços de referência utilizados no encaminhamento de chamadas de um domínio para o outro. São definidos os protocolos de acesso ao CDSF, bem como os métodos disponíveis. Em sua concepção, recorre-se a uma modelagem modular, que permite futuras melhorias, apenas por troca de módulos. Como estudos de caso para validar a proposta são apresentados cenários de chamadas que utilizam o Serviço VCC, passando pelo CDSF. Por fim, conclui-se que a integração entre os domínios é viável se a proposta deste trabalho for utilizada. Também se demonstra que a separação dos planos de controle dos planos de dados (de usuário) é uma das contribuições fundamentais da arquitetura NGN para o sucesso de suas implementações, como por exemplo o IMS.Além disso, destacam-se as vantagens que o Serviço VCC pode agregar ao IMS, contribuindo para sua adesão em menor prazo pelas operadoras de telecomunicações, dado que esse serviço contribui para a integração de redes, cada vez mais convergentes, agregando mobilidade e continuidade à sua utilização.This work intends to study and implement the integration between the circuit switching domain and the IP Multimedia Subsystem (IMS) to support vertical handovers that are between different access networks, such as Global System for Mobile communications (GSM) and WiFi. Therefore the specifications are incomplete about this topic in standards from the entities who works with this subject. Then, is presented a new proposal for this integration: a new functional entity to realize this integration: the Call Data Storage Function (CDSF), which interacts with other modules of VCC Service and guarantees that some information shared between modules are not lost, due to conversion of signalling protocols in the interface between domains. Besides that, CDSF helps in the control of allocation of reference address that are used to route calls from one domain to another. Access protocols to CDSF are defined and CDSF methods are exposed. The CDSF design uses a modular approach, which allows future improvements, just changing modules. As case studies to validate this work proposal, call scenarios are presented that uses the VCC Service, using CDSF. Finally, it is concluded that the integration between domains is viable if this work proposal is used. It is presented, as well, that the separation between control plans and data plans is one of the main contributions of NGN architecture to the success of its implementations, like IMS. Furthermore, it is exposed the advantages that VCC Service can aggregate to IMS, contributing for more rapidly adoption by telecommunications operators, considering that this service helps the networks integration, adding convergence, mobility and continuity.
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Yokoyama, Roberto Sadao. « Gerenciamento de handovers em next generation networks com agregação de contexto ». Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-26082009-172814/.
Texte intégralRésumé :
Em NGN (Next Generation Networks), os usuários podem se conectar em diferentes tecnologias de rede e desejam, além de uma comunicação transparente, novos serviços personalizados. Neste sentido, este trabalho explora informações de contexto em NGN. O principal objetivo é capturar as informações de contexto envolvidas no momento da utilização da rede sem fio, na escolha do novo ponto de acesso e no procedimento do handover. Este contexto capturado é aplicado para serviços cientes de contexto. A proposta é validada por meio de dois cenários, o primeiro é um mashup que exibe as redes sem fio disponíveis de um determinado local e o segundo um protótipo gerenciador de conexões para atender as preferências do usuário. Adicionalmente, são realizadas duas avaliações do impacto do uso de contexto em handovers. Para tanto, foi implantado um testbed NGN com o protocolo Mobile IPIn the NGN (Next Generation Networks) users can connect their Internet devices to different network technologies. In addition to a seamless communication, users desire new and personalized services. In this sense, this thesis exploits the context-aware information in NGN environments. The main propose is to capture the context information about the time involved by the use of wireless link for selecting the target access point and on the handover procedure. This context information is applied to the context-aware services. The propose is validated through two scenarios: the first is a mashup that shows the availability of wireless networks in a particular location, and the second is a prototype of a connection manager to attend user´s preferences. In addition, two evaluations are accomplished on the impact by the use of context information over handovers. Thus, an NGN testbed is deployed with Mobile IP protocol
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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/.
Texte intégralRésumé :
Dans le nouveau paysage de convergence multiservices de l'approche NGN/IMS et en considérant les besoins de l'utilisateur NGN qui est mobile dans un environnement très hétérogène, nous avons proposé des adaptations informationnelles, architecturales et organisationnelles. Ces adaptations permettent de surveiller la mobilité inter et intra réseaux et de garantir la continuité de la QoS de bout en bout dans un environnement mono et multi provider(s). En effet, nous avons constaté que les bases de connaissances des profils des utilisateurs manquaient d'informations de QoS. Notre première contribution est donc d'ordre informationnel. Des informations de QoS sont ajoutées à la base HSS afin de l'enrichir. Ce que nous y exprimons sous forme de " profil de QoSd ". Ces nouvelles informations renseignent directement sur les décisions à prendre en fonction du profil utilisateur (préférences de QoS et de tarification, bandwidth, localisation, etc. ). Ainsi cette nouvelle base de connaissances orientée QoS permettra les adaptations dynamiques et rendra, par conséquent, la session IMS plus efficace. Nous avons proposé une modélisation de ces informations de QoS relatives aux profils des utilisateurs et aux services IMS offerts en utilisant les classes CIM que nous appelons " Pattern d'information IMS orienté QoS ". Du point de vue architectural, nous avons été amenés à définir de nouveaux composants afin d'intercepter les nouvelles informations de QoS nécessaires pour gérer et garantir la QoS demandée lors d'une session IMS en temps réel. Cette deuxième contribution forme le sous système " Interworking QoS Management Subsystem : IQMS ". IQMS collecte les informations extraites des protocoles impliqués lors d'une session IMS mobile et gère la mobilité des utilisateurs (QoS handover et QoS interworking) et de la session. Notre troisième contribution consiste à proposer un sous-système organisationnel pour la gestion de la QoS supportant la personnalisation du service dans un environnement multi providers, où un utilisateur pourrait s'abonner à un ou plusieurs opérateurs selon des critères de QoS. Cette approche constitue notre " Interworking QoS Management Subsystem multiple providers: IQMSmp "In 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"
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Johansson, Jonatan. « An IMS-based VOD Service Supporting Session Continuation ». Thesis, Linköping University, Department of Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-52343.
Texte intégralRésumé :
IP-based TV (IPTV) is gradually replacing traditional means for broadcasting. At the same time, players from the telecom industry is seeking to create a new, standardized architectural framework for delivering all kinds of multimedia services over IP to end users; the IP Multimedia Subsystem (IMS).
This thesis is about video on demand, one of the more popular services enabled by IPTV. The thesis starts out by introducing the reader to IMS and IPTV and presents the current work in the area of IMS-based IPTV, done by the TISPAN committee of the ETSI.
The author then takes an explorative approach in investigating how a signaling schema for an IMS-based VOD service could look like, based on TISPAN’s existing work. The service is subject to an extra requirement; it should support session continuity, meaning it should be possible to resume the streaming of a video where the user left off, possibly on a different device. The investigation shows that it is possible to combine SIP and RTSP in several ways to get the desired behaviour.
The second part of the results consists of a proof of technology-implementation of the signaling schema that is the output from the first part. The implemented service runs on an IPTV set-top box on the client side, and a regular PC on the server side. The service uses open source software to a great extent and is fairly portable. A sample VOD session using the implemented system is presented along with full message contents.
The thesis concludes with a summary of the results and a discussion on what has been left out from the implementation and possibly subject to further studies. Finally, there is a brief summary on the recent developments within the field of IMS-based IPTV.
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Бураківська, А. О., et А. В. Омельченко. « Аналіз методів забезпечення якості послуг мультисервісних мереж ». Thesis, ХНУРЕ, 2021. https://openarchive.nure.ua/handle/document/16487.
Texte intégralRésumé :
The concept of Next Generation Network NGN (Next Generation Network), which uses TCP / IP technology as a basis for building multiservice networks, gives the operator great opportunities to organize a virtually unlimited number of services. But at the same time it sets new challenges in terms of creating and
implementing new methods of traffic service. The struggle for resources affects the quality of service for all types of traffic, including IPTV traffic. The modern model of differentiated service provides for the division of traffic into classes with giving them different priorities in service. The problem of establishing priorities for different types of traffic was solved by the method of reducing individual quality indicators to a generalized value function of the additive type using weights.
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Larsen, Dana B. « IN SEARCH OF THE THIRD FORCE : THE AMERICAN LOBBY FOR NGO DINH DIEM (VIETNAM) ». Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/292095.
Texte intégral
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ONALI, TATIANA. « Quality of service technologies for multimedia applications in next generation networks ». Doctoral thesis, Università degli Studi di Cagliari, 2008. http://hdl.handle.net/11584/265976.
Texte intégralRésumé :
Next Generation Networks are constantly evolving towards solutions that allow the operator to provide advanced multimedia applications with QoS guarantees in heterogeneous, multi-domain and multi-services networks. Other than the unquestionable advantages inherent the ability to simultaneously handle traffic flows at different QoS levels, these architectures require management systems to efficiently perform quality guarantees and network resource utilization. These issues have been addressed in this thesis.
DiffServ-aware Traffic Engineering (DS-TE) has been considered as reference architecture for the deployment of the quality management systems. It represents the most advanced technology to accomplish either network scalability and service granularity goals. On the basis of DS-TE features, a methodology for traffic and network resource management has been defined. It provides some rules for QoS service characterization and allows to implement Traffic Engineering policies with a class-based approach. A set of basic parameters for quality evaluation has been defined, that are the Key Performance Indicators; some mathematical model to derive the statistical nature of traffic have been analyzed and an algorithm to improve the fulfillment of quality of service targets and to optimize network resource utilization. It is aimed at reducing the complexity inherent the setting of some of the key parameters in the NGN architectures. Multidomain scenarios with technologies different from DS-TE have been also evaluated, defining some methodologies for network interoperability. Simulations with Opnet Modeler confirmed the efficacy of the proposed system in computing network configurations with QoS targets.
With regard to QoS performance at the application level, video streaming applications in wireless domains have been particularly addressed. A rate control algorithm to adjust the rate on a per-window basis has been defined, making use of a short-term prediction of the network delay to keep the probability of playback buffer starvation lower than a desired threshold during each window.
Finally, a framework for mutual authentication in web applications has been proposed and evaluated. It integrates an IBA password technique with a challenge-response scheme based on a shared secret key for image scrambling. The wireless environment is mainly addressed by the proposed system, which tries to overcome the severe constraints on security, data transmission capability and user friendliness imposed by such environment.
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Roman, Jennie, et Lisa Ringberg. « Ngn som oxå känner att d e så ball med språk ? *s* : - En kvalitativ studie om språket i gästböcker på communities på Internet ». Thesis, Jönköping University, School of Education and Communication, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1243.
Texte intégralRésumé :
Someone that also feels language is fun? *lol*
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A qualitative study about the language used in community guest books on the Internet
Lisa Ringberg and Jennie Roman
This is a study about the written language used in two different internet community guestbooks were there is an age difference of 11,2 years between the registered users of the two communitiess. The two communities chosen for the study were LunarStorm, with an average age of 18 years and Familjeliv, with an average age of 29,2 years. During 4 weeks, from 071106-071201, 50 randomly selected guestbook posts were collected from each community. Out of these posts, 25 were written by women and 25 were written by men. We have chosen to concentrate our study on the use of expression symbols – by this we mean the images that can be created with symbols that sometimes go under the name of smilies. We also looked at the use of symbol combinations – by this we mean a combination of characters and letters that go together to create some sort of symbol. We studied the use of shortenings, alternative spellings and the use of sound imitating words. Since we were not able to find much earlier research in this specific subject area, much of this study is based on our own pre comprehension. The earlier research we managed to acquire is more concerned with how the language is used on the Internet in general and is not specifically aimed at internet communities and guestbooks. It’s aimed at what a conversation is and how it’s built, since much of the written language used on the Internet resembles our own spoken language. The written language on the Internet generally contains uses of shortenings, expression symbols, alternative spellings, sound imitating words and symbol combinations and also ungdomsspråk. The method we implemented in this study was a qualitative approach and we especially focused on a text - and contents analysis. We chose this method mainly because we wanted to see what is unique in each community and the writing in the guestbook posts and not what is general. We want to highlight the unique and the qualitative aspects from the guestbook posts and not for example the number of expression symbols. The study has been tested for its validity and reliability to ensure the accuracy of its results.
The results we got didn’t agree with what we believed before the study. We thought that the younger community members of LunarStorm would use the categories we studied far more often than those of Familjeliv, but instead it showed that the members of LunarStorm and the members of Familjeliv used about the same expression symbols and symbol combinations. When it came to shortenings the members of Familjeliv used more correct shortenings than the members of LunarStorm. The alternative spellings differed, since one word had a number of different alternative spellings. When it came to the last category, sound imitating words, these were more frequently used by the members of LunarStorm than the members of Familjeliv. The younger target group used many different variations of these, but the most common was the sound imitating words for a laugh for example *hehe*.
Keywords: Internet, communities, guestbooks, expression symbols, symbol combinations, alternative spellings, shortenings, sound imitating words
Ngn som oxå känner att d e så ball me språk? *s*
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En kvalitativ studie om språket i gästböcker på communities på Internet
Lisa Ringberg och Jennie Roman
Detta är en studie som handlar om det skrivna språket i gästböcker på två communities på Internet med en medelålderskillnad på 11,2 år. De två communities vi valt att samla in vårt material ifrån är ungdomscommunityt LunarStorm med en medelålder på 18 år och föräldrarcommunityt Familjeliv med en medelålder på 29,2 år. Vår studie gick ut på att vi under 4 veckor, från 071106-071201, samlade in 50 stycken slumpmässigt utvalda gästboksinlägg från vardera community, varav 25 stycken var skrivna av kvinnor och 25 stycken var skrivna av män. Det vi har inriktat vår studie på är förekomsten av uttryckssymboler – med uttryckssymboler menar vi de små bilder som även ibland går under namnet smilies, symbolkombinationer– med symbolkombinationer menar vi kombinationer av tecken och bokstäver som tillsammans bildar någon form av symbol, förkortningar, alternativa stavningar samt förekomsten av ljudhärmande ord. Eftersom det inte finns mycket tidigare forskning inom detta område specifikt har mycket av studien baserats på vår egen förförståelse. Den tidigare forskning vi tagit del av handlar mer om hur språket generellt används på Internet och inte specifikt på communities och i gästböcker. Den tidigare forskning vi tagit del av behandlar vad ett samtal är och hur det är uppbyggt eftersom mycket av det skrivna språket på Internet liknar vårt talspråk, det skrivna språket på Internet mer generellt innehållande förkortningar, uttryckssymboler, alternativa stavningar, ljudhärmande ord samt symbolkombinationer och tillsist ungdomsspråk. Som metod för att genomföra denna studie har vi använt oss av en kvalitativ ansats och då speciellt inriktat oss text- samt innehållsanalys. Denna metod valde vi främst för att vi ville se vad som är unikt för varje community och dess skrift i gästböcker och inte vad som är generellt. Vi vill framhäva det unika och kvalitativa i gästboksinläggen och inte antal av till exempel uttryckssymboler. Undersökningen har sedan testats genom validitet och reliabilitet.
Resultaten vi kom fram till gick emot den förförståelse vi hade sedan tidigare, där vi trodde att de yngre medlemmarna på LunarStorm skulle använda sig mer av samtliga kategorier vi studerat. Istället visade det sig att medlemmarna på LunarStorm och medlemmarna på Familjeliv använde sig av ungefär samma uttryckssymboler och symbolkombinationer. När det kommer till förkortningar använde sig medlemmarna på Familjeliv av fler korrekta förkortningar än medlemmarna på LunarStorm. De olika sätten att stava skiljde sig sedan mycket åt i utseende då ett ord kunde ha flertalet alternativa stavningar. När det kommer till den sista kategorin, ljudhärmande ord användes dessa mycket flitigare bland LunarStorm användare än bland Familjelivs. Den yngre målgruppen använde sig av många olika varianter av dessa, men vanligast var ljudhärmande ord för skratt som till exempel *hehe*.
Nyckelord: Internet, communities, gästböcker, uttryckssymboler, symbolkombinationerr, alternativa stavningar, förkortningar, ljudhärmande ord
36
Song, Songbo. « Advanced personalization of IPTV services ». Thesis, Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0001/document.
Texte intégralRésumé :
Le monde de la TV est en cours de transformation de la télévision analogique à la télévision numérique, qui est capable de diffuser du contenu de haute qualité, offrir aux consommateurs davantage de choix, et rendre l'expérience de visualisation plus interactive. IPTV (Internet Protocol TV) présente une révolution dans la télévision numérique dans lequel les services de télévision numérique sont fournis aux utilisateurs en utilisant le protocole Internet (IP) au dessus d’une connexion haut débit. Les progrès de la technologie IPTV permettra donc un nouveau modèle de fourniture de services. Les fonctions offertes aux utilisateurs leur permettent de plus en plus d’autonomie et de plus en plus de choix. Il en est notamment ainsi de services de type ‘nTS’ (pour ‘network Time Shifting’ en anglais) qui permettent à un utilisateur de visionner un programme de télévision en décalage par rapport à sa programmation de diffusion, ou encore des services de type ‘nPVR’ (pour ‘network Personal Video Recorder’ en anglais) qui permettent d’enregistrer au niveau du réseau un contenu numérique pour un utilisateur. D'autre part, l'architecture IMS proposée dans NGN fournit une architecture commune pour les services IPTV. Malgré les progrès rapides de la technologie de télévision interactive (comprenant notamment les technologies IPTV et NGN), la personnalisation de services IPTV en est encore à ses débuts. De nos jours, la personnalisation des services IPTV se limite principalement à la recommandation de contenus et à la publicité ciblée. Ces services ne sont donc pas complètement centrés sur l’utilisateur, alors que choisir manuellement les canaux de diffusion et les publicités désirées peut représenter une gêne pour l’utilisateur. L’adaptation des contenus numériques en fonction de la capacité des réseaux et des dispositifs utilisés n’est pas encore prise en compte dans les implémentations actuelles. Avec le développement des technologies numériques, les utilisateurs sont amenés à regarder la télévision non seulement sur des postes de télévision, mais également sur des smart phones, des tablettes digitales, ou encore des PCs. En conséquence, personnaliser les contenus IPTV en fonction de l’appareil utilisé pour regarder la télévision, en fonction des capacités du réseau et du contexte de l’utilisateur représente un défi important. Cette thèse présente des solutions visant à améliorer la personnalisation de services IPTV à partir de trois aspects: 1) Nouvelle identification et authentification pour services IPTV. 2) Nouvelle architecture IPTV intégrée et comportant un système de sensibilité au contexte pour le service de personnalisation. 3) Nouveau service de recommandation de contenu en fonction des préférences de l’utilisateur et aussi des informations contextesInternet Protocol TV (IPTV) delivers television content to users over IP-based network. Different from the traditional TV services, IPTV platforms provide users with large amount of multimedia contents with interactive and personalized services, including the targeted advertisement, on-demand content, personal video recorder, and so on. IPTV is promising since it allows to satisfy users experience and presents advanced entertainment services. On the other hand, the Next Generation Network (NGN) approach in allowing services convergence (through for instance coupling IPTV with the IP Multimedia Subsystem (IMS) architecture or NGN Non-IMS architecture) enhances users’ experience and allows for more services personalization. Although the rapid advancement in interactive TV technology (including IPTV and NGN technologies), services personalization is still in its infancy, lacking the real distinguish of each user in a unique manner, the consideration of the context of the user (who is this user, what is his preferences, his regional area, location, ..) and his environment (characteristics of the users’ devices ‘screen types, size, supported resolution, ‘‘ and networks available network types to be used by the user, available bandwidth, ..’) as well as the context of the service itself (content type and description, available format ‘HD/SD’, available language, ..) in order to provide the adequate personalized content for each user. This advanced IPTV services allows services providers to promote new services and open new business opportunities and allows network operators to make better utilization of network resources through adapting the delivered content according to the available bandwidth and to better meet the QoE (Quality of Experience) of clients. This thesis focuses on enhanced personalization for IPTV services following a user-centric context-aware approach through providing solutions for: i) Users’ identification during IPTV service access through a unique and fine-grained manner (different from the identification of the subscription which is the usual current case) based on employing a personal identifier for each user which is a part of the user context information. ii) Context-Aware IPTV service through proposing a context-aware system on top of the IPTV architecture for gathering in a dynamic and real-time manner the different context information related to the user, devices, network and service. The context information is gathered throughout the whole IPTV delivery chain considering the user domain, network provider domain, and service/content provider domain. The proposed context-aware system allows monitoring user’s environment (devices and networks status), interpreting user’s requirements and making the user’s interaction with the TV system dynamic and transparent. iii) Personalized recommendation and selection of IPTV content based on the different context information gathered and the personalization decision taken by the context-aware system (different from the current recommendation approach mainly based on matching content to users’ preferences) which in turn highly improves the users’ Quality of Experience (QoE) and enriching the offers of IPTV services
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Armant, Olivier. « A genomic approach to study the molecular pathways of differentiation regulated by the proneural genes Mash 1 and Ngn 2 during development of the mouse telencephalon ». Université Louis Pasteur (Strasbourg) (1971-2008), 2005. https://publication-theses.unistra.fr/public/theses_doctorat/2005/ARMANT_Olivier_2005.pdf.
Texte intégralRésumé :
Les principales phases cellulaires de la neurogenèse chez les mammifères sont aujourd'hui bien décrites. Toutefois les mécanismes moléculaires à l'origine de la diversité des neurones produis à partir d'une population restreinte de cellules souches neurales ne sont toujours pas correctement compris. L'activité proneurale de certains facteurs de transcriptions à domaine bHLH (" basic Helix Loop Helix ") a été conservée au cours de l'évolution de la Drosophile aux mammifères, et démontré comme essentielle pour la différentiation des cellules souches neurales en neurones. Ma thèse porte sur l'étude au niveau transcriptionnel des voies moléculaires régulées par les facteurs proneuraux Neurogénines et Mash1 lors de la différenciation du télencéphale de la souris. Je démontre tout d'abord que les gènes proneuraux sont capables d'instruire un programme de différenciation spécifique de sous-types neuronaux. En effet, lors des phases précoces du développement du cortex cérébral, les gènes Ngn1 et Ngn2 régulent de manière positive un phénotype neuronal de type glutamatergique tout en inhibant le phénotype subcortical GABAergique spécifiquement induit par Mash1. Ce travail m'a également permis d'identifier des gènes cibles directs des facteurs proneuraux. En particulier de nombreux gènes impliqués dans la voie de signalisation Notch, notamment les gènes de la famille Delta, sont vraisemblablement directement régulés par Mash1 dans le télencéphale. Enfin, l'analyse génomique du programme de différentiation régulé par les gènes proneuraux fourni un outil remarquable pour la découverte de nouveaux gènes potentiellement impliqués dans la différentiation de population neuronales ayant des fonctions importantes et affectés dans certaines maladies neurologiques. Je décris ici une analyse fonctionnelle préliminaire de deux gènes, Delta like homologue 1 et Nemo like kinase, régulés dans le télencéphale par les facteurs proneurauxThe main cellular steps of neurogenesis start to be well established in mammals. But the molecular mechanisms leading to the neuronal diversity produced from a reduced population of neural stem cells are still not understood. The proneural activity of several transcription factors of the bHLH (basic Helix Loop Helix) family is conserved through evolution from Drosophila to mammals and play crucial roles to instruct the differentiation of neurons from neural stem cells. I have studied, at the transcriptional level, the molecular pathways regulated by proneural factors Neurogenins and Mash1 during development of the mouse telencephalon. First, I show that in parallel to the activation of a generic neuronal differentiation programme, proneural genes specify different neuronal subtype identities. Indeed, during the early phase of cortical development Ngn1 and Ngn2 induce a glutamatergic fate, while in the same time inhibit the subcortical GABAergic phenotype regulated by Mash1. I show also the characterisation of target genes directly regulated by proneural genes. In particular numerous genes from the Delta family, involved in the Notch signalling pathway, are presumably directly regulated by Mash1 in the telencephalon. Finally the genome wide analysis of the neuronal differentiation pathways regulated by proneural genes provide a very efficient tool for the discovery of new genes putatively involved in the differentiation of neuronal populations, and potentially affected in neurological diseases. I describe in this work preliminary results for the functional analysis of two genes, Delta like 1 and Nemo like kinase, regulated in the telencephalon by proneural genes
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Kessal, Ouanouche Soumia. « Gestion Dynamique de Service de Bout en Bout dans un Contexte de Mobilité et d'Ubiquité : du Déploiement au Delivery des services ». Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00679283.
Texte intégralRésumé :
L'intensification de la concurrence et les exigences des clients pour des services toujours plus innovants et fiables conduisent l'opérateur à accélérer le renouvellement de son portefeuille de services et à vouloir devancer ses concurrents dans leur mise sur le marché. Mais dans le nouveau contexte NGN/NGS où l'utilisateur est nomade, change de terminal, change d'environnement et désire une continuité de service en tout lieu et selon ses préférences, la fourniture de services depuis la stratégie jusqu'à l'exploitation devient de plus en plus complexe et longue à maîtriser. Ainsi, avoir une gestion dynamique qui permet d'améliorer le TTM et le ROI devient un challenge pour les opérateurs. Dans cette thèse, nous nous intéressons à la résolution de problèmes de gestion du cycle de vie des services depuis le Déploiement jusqu'au Delivery dans un environnement ubiquitaire et mobile. Pour ce faire, dans un premier temps, nous commençons par analyser les travaux existants en termes de gestion du cycle de vie des services, puis nous identifions plus précisément les besoins du nouveau contexte NGN/NGS du point de vue de l'utilisateur et de l'opérateur. Les verrous à lever concernent les différentes phases du cycle de vie des services. Comment les repenser afin d'avoir une continuité de service et un maintien de la QoS dans ce contexte de mobilité et d'ubiquité. Nos contributions sont au nombre de quatre et concerne le Déploiement, le Provisioning, le Delivery et l'Assurance des services. Deux champs d'application sont directement impactés par nos propositions et permettent de valoriser nos travaux. Le premier se déduit de la gestion de la mobilité de la session de l'utilisateur par la QoS. Le deuxième est les standards télécom et plus particulièrement les processus business.
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Schreiner, Florian [Verfasser], Thomas [Akademischer Betreuer] Magedanz, Odej [Akademischer Betreuer] Kao, Serge [Akademischer Betreuer] Fdida et Alfonso [Akademischer Betreuer] Ehijo. « Resource efficient quality of service management for NGN services in federated cloud environments / Florian Schreiner. Gutachter : Thomas Magedanz ; Odej Kao ; Serge Fdida ; Alfonso Ehijo. Betreuer : Thomas Magedanz ». Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1068255986/34.
Texte intégral
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González, Santana Arturo. « Cambios en la expresión de los genes PDX-1 y NGN-3 relacionados con la falla de la célula beta en pacientes mexicanas con DMG en comparación con pacientes embarazadas sin DMG ». Tesis de maestría, Universidad Autónoma del Estado de México, 2020. http://hdl.handle.net/20.500.11799/109120.
Texte intégralRésumé :
Gestational diabetes mellitus (DMG) is a condition characterized by the increment of glucose concentrations in blood during pregnancy. DMG and diabetes mellitus type 2 (DM2) share part of their physiopathology and some shared genetic factors have been identified, such as altered expression the PDX-1 and NGN-3 genes that are involved in the pancreatic beta cell failure associated with an insulin resistant state, morphologic alterations in the pancreas and deficiencies with the insulin production and glucose management in glucotoxicity and lipotoxicity statuses. In Mexico the DMG prevalence rates are unknown, however DMG has been identified as a secondary cause of maternal mortality, which has a heterogeneous distribution in the Mexican Republic and in certain regions there are high maternal mortality rates. On a global scale, DMG prevalence is heterogeneously distributed and it varies among the different ethnic groups due to genetic and epigenetic factors. This study utilized molecular methods to extract RNA from blood samples and amplifying them with the polymerase chain reaction with a retrotranscriptase enzyme to obtain complementary DNA (cDNA) and along with the Western Blot technique, analyzed the expression of the genes of interest in patients with DMG during their pregnancy, as well as to compare the results with those of patients with a normal pregnancy, in the Maternal and Perinatal Hospital “Mónica Pretelini Saénz” (HMPMPS) in Toluca, Mexico. Data was obtained from 38 patients of which 22 belonged to the control group and 16 to the experimental group, the mean age was of 29.00 ± 7.74 years. Using the ΔΔCt method the expression fold change for PDX-1 was 0.458 and for NGN-3 it was 0.361. In the correlation analysis there was a statistically significant correlation between the expression values of both genes in both groups. The multiple regression was significant for both genes expression and glucose levels in case of having normal weight. Conclusion: PDX-1 and NGN-3 low serum expression could be predictors of higher glucose levels.Ciprés Grupo Médico
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BENETTI, Elisa. « Architetture, Servizi e Multimedialità nei Nuovi Media ». Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2388784.
Texte intégralRésumé :
Taking inspiration from the emergence of new potentialities proposed by the introduction of Digital Television in the national territory, the initial aim of the thesis was the study of the adaptation of audio/video and informative content for this device, that has always been the best known and the most widespread media in Italian families. The logical consequence has been an extension to the concept of multichannel modality, that would develop the same services trough several communication media, standardizing them due to facilitate their usage, moving from one media to another one. This process allows to have the widest target of users, overcoming the well-known problems of digital and knowledge divide.
Firstly, wireless networks have been analyzed, in this case DVB-T broadcasting and its standards for the development of services, MHP and Teletext, showing how the different transport streams could be implemented through the OpenSource software adopted, and studying an optimization of each bit rate depending on the importance and usage rate of services.
Secondly, moving on to wired networks, a survey has been carried out about different existing architectures for Next Generation Networks, focusing on pros and cons of point-to -point and PON solutions. Assuming, then, IPTV as a future killer application developed over optical networks, a research has been carried out about existing multicast routing algorithms and protocols, which are necessary for the deployment of this kind of service. Moreover a schematization through AUML has been proposed, in order to standardise the great heterogeneity of these protocols.
Different types of MHP services are then presented, in compliance with arrangements that allow a weak interactivity, that is no return channel is used: informative content, navigable through a double filtering of news included; conditional acces for the visualization of sensitive data; galleries composed by alternate images and text, thought for guided tours and self-evaulation tests associated to a t-learning system. Informative services have also been developed through Teletext technology due to be available on any device, given the limited distribution of interactive decoders in Italy. Performances of this service implemented through MHP and Teletext have been measured and compared to highlight strength and weaknesses of both technologies. The totality of services, including the Teletext version, have been then proposed, with the same graphics and features, even on a website.
At the same time several projects have been implemented, allowing the collection of multiple data of public interest, that could be available for citizens through the multichannel system created. For first a data Management Center for environmental monitoring has been developed: this collects data gathered from heterogeneous sensors, located throughout the regional territory, that could be correlated, providing more complex information. Furthermore, a project has been implemented due to have a joint monitoring of networks and services, thaks to the Lepida Network, collecting, standardizing, aggregating data about the network traffic and the frequency of use of some services provided through the same network. Finally, a portal born for the collection of Open Data has been implemented, at the request of the Emilia Romagna Region: this results in a point of convergence of all data gathered both by projects previously explained, and by other local institutions and organizations, providing heterogeneous information about land register, population, cartographical data, and so on.
Multichannel modality has been mantained also in audio/video context. First of all a conversion chain has been studied that allows to have a hight quality even with a low bandwidth, both in case of regular TV programming and in case of live events. Morover the stream has been doubled in order to view it in simulcast on the web; in addition, audio/video content are available in On Demand mode on the same web site. Finally, critical situations regarding IPTV have been highlited and a survey has been done about which multicast protocols should be more efficient to distribute IPTV throughout the various parts of an NGN.
Lastly, one more extension of the multichannel system is illustrated through the development of an audio/video streaming and an informative service, on an emerging, OpenSource, multimedia platform named OpenBOXware.
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Blomberg, Mikael. « Jag fattar inte att man kan kalla ngn jävla hora på skämt : en enkätstudie om könsord som används vid mobbning och sexuella trakasserier hos ungdomar i år 7-9 ». Thesis, Linköping University, Department of Educational Science (IUV), 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1607.
Texte intégralRésumé :
Arbetets huvudsyfte var bland annat att undersöka könsord och ord med könsanknytning som används vid mobbning/sexuella trakasserier i skolan. Enkätstudien nådde 141 pojkar och 136 flickor i år 7-9. Enligt de redovisade resultaten är användning av kränkande ord i mobbningssammanhang mest förekommande, före ryktesspridning och fysisk kontakt. Åtta procent av alla eleverna anser sig ha känt sig mobbade/sexuellt trakasserade dagligen. Fem procent har mobbat eller utsatt någon för sexuella trakasserier varje dag. Fyrtionio procent av eleverna använder sig av kränkande ord oftast i skolan. Orden används mest i skolans korridor. De flesta elever är överens om att deras föräldrar ingriper i större utsträckning än andra vuxna då de hör ifrågavarande ord. Totalt sett har ett fyrtiotal ord presenterats av eleverna. De mest frekventa orden har analyserats kvantitativt. Eleverna i alla åldrar är medvetna om de grova ordens kränkningsgrad. Ungefär hälften av alla svarande anger att samma ord kan ha större eller mindre kränkningsgrad beroende på situationen i vilken orden används. Både flickor och pojkar anser generellt sett att könsord används i större utsträckning mot flickor.
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Vingarzan, Dragos [Verfasser], Thomas [Akademischer Betreuer] Magedanz, Klaus [Akademischer Betreuer] David, Nöel [Akademischer Betreuer] Crespi, Paolo [Akademischer Betreuer] Bellavista et Axel [Akademischer Betreuer] Küpper. « Design and implementation aspects of open source Next Generation networks (NGN) test-bed software toolkits / Dragos Vingarzan. Gutachter : Axel Küpper. Betreuer : Thomas Magedanz ; Klaus David ; Nöel Crespi ; Paolo Bellavista ». Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1067385576/34.
Texte intégral
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Scata', Marialisa. « Security Analysis of ICT Systems based on Bio-Inspired Models ». Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/1095.
Texte intégralRésumé :
In recent years, information and communication technology (ICT) has
been characterized by several evolving trends and new challenges. The
design and management of each information system must address is-
sues related to planning an ICT infrastructure. The design of an ICT
infrastructure can not ignore the technological and social analysis, to
be also linked to the economic aspects, and now also linked to the
sustainability. Dwawing inspiration from biology that has led to useful approaches to problem solving, this Ph.D. dissertation propose and develop a risk analysis model and security analysis and management model. This Ph.D. thesis proposes and shows a new kind of research topic, Bio-Inspired Telecommunication Security. It will be key to reach efficiency of the future networks and to obtaine a sustainable ICT infrastructure in terms of energy consumption, economic investment and in terms of privacy and security.
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Gregor, Lukáš. « Ověřování stabilního provozu sítě nové generace měřením přenosových parametrů ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377341.
Texte intégralRésumé :
This thesis deals with the measurement of transmission parameters in the new generation access networks NGA. The aim of the thesis is to build and configure a test network and scenarios for the measurement of service quality parameters and then verify the transmission stability. The theoretical part describes general functioning of NGN networks, the requirements of different telecommunications services on quality parameters, methodology and recommendations for measuring transmission parameters in packet networks. The practical part deals with the configuration of scenarios using mainly MPLS technology and methodology of their testing. Measurements were performed according to recommendations IETF RFC 2544, IETF RFC 6349 with the ExacTCP test and ITU-T Y.1564 with the EtherSAM test. For measurements were used measuring instruments of EXFO brand. In conclusion, the measurement results according to the mentioned standards were evaluated and also the advantages of using the measurement according to the given standard in NGA access networks were discussed.
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von, Essen Rickard. « Threat Analysis of Video on Demand Services in Next Generation Networks ». Thesis, Linköpings universitet, Institutionen för datavetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-63082.
Texte intégralRésumé :
IP Multimedia Subsystem (IMS) is the next generation of telecommunication systems. The system is based on an IP network and uses technologies from the Internet. The IMS system is designed to evolve from a telephone system into a general information and communication system. It is meant to include television, Video on Demand (VoD), interactive services etc, etc. It is designed to simplify the implementation of newservices in telecom networks. This report investigates security aspects of VoD services when merging an IP Television (IPTV) system with IMS. The investigation covers security functions in IMS, transitionsolutions for authentication of the Set-Top-Box (STB) in IMS, and identifies problems inthe integration of IPTV and IMS. The report concludes that IMS has good solid Authentication, Authorization, and Accounting (AAA) functions that will provide security and billing functionality. One problemis found in the media control between the STB and the streaming server. This interface lacked specification at the time of investigation, and some problems have been identified. These problems have to be solved before a system can be brought into service and beregarded as secure.
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Alaoui, Soulimani Houda. « Pilotage dynamique de la qualité de service de bout en bout pour une session "user-centric" ». Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0021.
Texte intégralRésumé :
Aujourd’hui, le marché des services est devenu de plus en plus concurrentiel. Les exigences des clients pour des offres de service en adéquation avec leurs usages et leurs préférences conduisent les fournisseurs à proposer de nouveaux services qui répondent à ce nouveau besoin pour se démarquer des concurrents et attirer de nouveaux clients. Avec la convergence des réseaux et celle des services de nouvelle génération (NGN/NGS), de nouveaux services sont apparus. Les utilisateurs sont nomades et veulent utiliser leurs services de différentes manières n’importe où, n’importe quand et par n’importe quel type de terminal, et cela avec une continuité de service et une qualité de service de bout en bout. Ainsi, fournir des services personnalisés aux clients dans un environnement hétérogène et mobile devient un challenge pour les opérateurs et les fournisseurs de service pour améliorer le retour sur investissement (ROI) et le délai de mise sur le marché (TTM). Nos réflexions à propos de la fourniture des services personnalisés selon les besoins fonctionnels et non-fonctionnels (QoS) des usagers, nous ont conduits à identifier les besoins du nouveau contexte NGN/NGS défini par l’intersection de ces trois éléments «user-centric, mobilité et QoS». Comment piloter dynamiquement la QoS de bout en bout pour une session unique «user-centric»? Comment assurer le « service Delivery» dans un contexte de mobilité et d’ubiquité? Ces nouveaux besoins, nous ont motivé à proposer des solutions à travers trois contributions principales qui prennent en considération la vision utilisateur et opérateur. Notre première contribution porte sur le modèle organisationnel. Nous proposons une nouvelle organisation avec un maximum de flexibilité, d’adaptabilité et d’autogestion, qui permet de piloter la QoS à chaque niveau de l’architecture (équipement, réseau et service). Dans cette organisation nous avons défini des acteurs et le rôle que joue chacun d’eux par rapport à la prise de décision au cours de la session de l’utilisateur, et cela pour maintenir la QoS de bout en bout dans un environnement qui est totalement hétérogène et mobile.Notre deuxième contribution traite du composant de service autonomique. Avec la complexité de la personnalisation des services dans un contexte hétérogène et mobile et le besoin de satisfaire la QoS de bout en bout, les ressources services doivent être prises en compte au même titre que les ressources réseaux. Donc, un degré élevé d’autosuffisance, d’autogestion et d’automatisation est demandé dans la ressource service (composant de service) pour améliorer le service delivery. Pour cela, nous proposons un composant de service autonomique «ASC: Autonomic Service Component» basé sur un agent de QoS intégré qui s’autocontrôle et s’autogère pour adapter dynamiquement ses ressources en réponse à un changement de situations au cours de la session de l’utilisateur. Notre troisième proposition couvre le modèle protocolaire. La session de services personnalisés nécessite des interactions plus flexibles au niveau service pour avoir une session unique avec une continuité de service. Nous proposons un protocole de signalisation SIP+ qui permet la négociation de la QOS des services personnalisés dès la phase d’initialisation de la session et de la renégociation de la QoS pendant l’usage, pour maintenir le service avec la QoS requise à travers une session unique.De façon plus concrète, nous présentons nos expérimentations à travers un scenario et une plate-forme de démonstration qui nous permet de tester la faisabilité et la performance de nos contributions. Les apports et les perspectives de cette thèse sont consignés en conclusionNowadays, the services market has become increasingly competitive. Customer requirements for service offerings in line with their uses and preferences led providers to offer new services to meet this new need and to stand out from competitors and attract new customers. With the success of the network and service convergence (NGN / NGS), new services have emerged. A mobile user desires to access his services anywhere, anytime and on any type of terminal.Thus, providing customized services to clients while ensuring the service continuity and the end-to-end quality of service in a heterogeneous and mobile environment became a challenge for mobile operators and service providers to improve the return on investment (ROI) and time-to-market (TTM). Our thinking about the provision of customized services according to the functional and non-functional (QoS) needs of the users has led us to identify the needs of the new context NGN / NGS defined by the intersection of these three elements "user-centric, mobility and QoS". How to dynamically control the end-to-end QoS for a single "user-centric" session? How to ensure the "Service Delivery" in the context of mobility and ubiquity? These new needs have led us to propose solutions through three main contributions that take into account the user and the operator vision. Our first contribution concerns the organizational model. We have proposed a new organization with a maximum of flexibility, adaptability and self-management which allows the control of the QoS at each level of the architecture (equipment, network and service). In this organization, we have defined actors and the role of each one in relation to the decision-making process during the user session in order to maintain the end-to-end QoS in an environment that is totally heterogeneous and mobile. Our second contribution addresses the autonomic service component. With the complexity of services personalization in a heterogeneous and mobile context and the need to satisfy the end to end QoS, services and network resources must be taken into account. Therefore, a high degree of self-sufficiency, self-management and automation is required in the resource service to improve the service delivery. We have therefore proposed an autonomic service component based on an integrated QoS-agent which is self-controlled and self-managed to dynamically adapt its resources in response to changing situations during the user’s session. Our third proposal covers the model protocol. The personalized services session requires more flexible interactions at the service level in order to obtain a single session with service continuity. We have proposed a signalling protocol SIP + that allows the negotiation of the QoS of personalized services at the session initialization phase and the renegotiation of the QoS during the utilization to maintain the service with the required QoS through a unique session. More concretely, we have presented our experiments through a scenario and demonstration platform that allows us to test the feasibility and the performance of our contributions. The contributions and perspectives of this thesis are stated in the conclusion
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Huang, Cuiting. « Service composition in converged service environment ». Thesis, Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0009/document.
Texte intégralRésumé :
L'objectif de cette thèse est de fournir des mécanismes améliorés pour déployer des services compétitifs par des manières rapides et rentables. Nous proposons un modèle de composition de service basé sur un environnement IMS/Web convergent. Ce modèle permet aux utilisateurs non professionnels de réutiliser les services existants pour créer de nouveaux services facilement. Pour améliorer la fonctionnalité de composition automatique, trois stratégies, y compris mise à jour passive, mise à jour active et mise à jour hybride sont proposées et analysées. Nous introduisons ensuite une plateforme centralisée d'exposition de service pour une variété de services, y compris services de Télécom / Web / appareil / services générés par les utilisateurs. Cette plateforme vise à renforcer les caractéristiques de centrée-sur-utilisateur et convergence, et fournir l'accès unifié à différents services. Par la suite, deux modèles basés sur le P2P sont conçus pour compléter le modèle centralisé: i) Un modèle hiérarchique basé sur Chord pour garantir l'efficacité de la découverte de services. Il adopte le concept de publication et découverte de service abstrait pour permettre à la recherche de service ambiguë. ii) Un modèle de superposition-triplex et P2P basé, qui cible principalement des services offerts par les appareils. Dans ce modèle, nous utilisons des passerelles pour déléguer des appareils résidant en eux pour l'exposition globale de services, et utilisons une architecture basée sur une superposition triplex, qui comprend une couche P2P non structurée, une couche de réseau sémantique (SON), et une couche de dépendance de service, pour la partage de l'information de service et la découverte de servicesThe goal of this thesis is to provide enhanced mechanisms to deploy competitive services in a rapid and cost-effective manner. To achieve this goal, we first propose an automatic service composition model relying on an IMS/Web converged environment. This service composition model is intended to be one in which even non-professional users can easily reuse existing services to create new services. To further improve the automatic service composition feature, three strategies including passive update, active update and hybrid update are proposed and analyzed. We then propose a centralized service exposure framework for a variey of services, including Telecom / Web / Device / user-generated services. This framework aims at enhancing the user-centric and convergence features, and providing the unified access to diverse services.Subsequently, two P2P based service information sharing models are designed to complement the centralized service exposure model : i) A hierarchical P2P based model, which reuses Chord for guaranteeing the service discovery efficiency, meanwhile adopts the concept of abstract service publication and discovery for enabling the ambiguous services searching. ii) A triplex P2P overlay based model, which mainly targets the devices offered services. In this model, we use the gateways to delegate the devices residing in them for the global service exposure, and use a triplex overlay based architecture, which includes an underlying unstructured P2P layer, a Semantic Overlay Network (SON) based overlay and a service dependency overlay, for the service information sharing and discovery
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Маслак, Михайло Олексійович. « Транспортні мережі на основі технології MPLS, принципи, перспективи розвитку ». Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/41589.
Texte intégralRésumé :
Мета роботи – дослідження транспортних мереж на основі технології MPLS. Аналіз напрямків адаптації технології MPLS для досягнення відповідності вимогам транспортних мереж.
У даній роботі розглядається транспортна мережа як невід’ємна частина телекомунікаційної системи, аналізуються технічні принципи функціювання мереж MPLS, проводиться огляд основних технічних принципів транспортних мереж MPLS TP та їх відмінностей від принципів MPLS, аналізується питання моніторингу і керування мережами MPLS TP та питання щодо напрямку подальшого розвитку мереж MPLS TP, зокрема, переходу до технології GMPLS.The purpose of the work is to study transport networks based on MPLS technology. Analysis of directions of MPLS technology adaptation to achieve compliance with the requirements of transport networks. This paper considers transport network as an integral part of telecommunication system, analyzes technical principles of MPLS networks operation, reviews main technical principles of MPLS TP transport networks and their differences from MPLS principles, analyzes the issue of monitoring and management of MPLS TP networks and the direction of further development of MPLS TP networks, in particular, the transition to GMPLS technology.
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SONG, Songbo. « Advanced personalization of IPTV services ». Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00814620.
Texte intégralRésumé :
Internet Protocol TV (IPTV) delivers television content to users over IP-based network. Different from the traditional TV services, IPTV platforms provide users with large amount of multimedia contents with interactive and personalized services, including the targeted advertisement, on-demand content, personal video recorder, and so on. IPTV is promising since it allows to satisfy users experience and presents advanced entertainment services. On the other hand, the Next Generation Network (NGN) approach in allowing services convergence (through for instance coupling IPTV with the IP Multimedia Subsystem (IMS) architecture or NGN Non-IMS architecture) enhances users' experience and allows for more services personalization. Although the rapid advancement in interactive TV technology (including IPTV and NGN technologies), services personalization is still in its infancy, lacking the real distinguish of each user in a unique manner, the consideration of the context of the user (who is this user, what is his preferences, his regional area, location, ..) and his environment (characteristics of the users' devices 'screen types, size, supported resolution, '' and networks available network types to be used by the user, available bandwidth, ..') as well as the context of the service itself (content type and description, available format 'HD/SD', available language, ..) in order to provide the adequate personalized content for each user. This advanced IPTV services allows services providers to promote new services and open new business opportunities and allows network operators to make better utilization of network resources through adapting the delivered content according to the available bandwidth and to better meet the QoE (Quality of Experience) of clients. This thesis focuses on enhanced personalization for IPTV services following a user-centric context-aware approach through providing solutions for: i) Users' identification during IPTV service access through a unique and fine-grained manner (different from the identification of the subscription which is the usual current case) based on employing a personal identifier for each user which is a part of the user context information. ii) Context-Aware IPTV service through proposing a context-aware system on top of the IPTV architecture for gathering in a dynamic and real-time manner the different context information related to the user, devices, network and service. The context information is gathered throughout the whole IPTV delivery chain considering the user domain, network provider domain, and service/content provider domain. The proposed context-aware system allows monitoring user's environment (devices and networks status), interpreting user's requirements and making the user's interaction with the TV system dynamic and transparent. iii) Personalized recommendation and selection of IPTV content based on the different context information gathered and the personalization decision taken by the context-aware system (different from the current recommendation approach mainly based on matching content to users' preferences) which in turn highly improves the users' Quality of Experience (QoE) and enriching the offers of IPTV services