Dissertations / Theses: 'Mobilité IP'

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Sabeur, Mehdi. "Gestion de la mobilité dans les réseaux IP sans fil." Evry, Institut national des télécommunications, 2008. http://www.theses.fr/2008TELE0006.

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La gestion de la mobilité dans les réseaux IP sans fil souffre encore du manque de solutions efficaces et scalables. Cette problématique reste donc d'un grand intérêt au sein de la communauté des réseaux et télécom. A la différence des systèmes de télécommunications traditionnels, considérant principalement des services de voix et donnée bas débit, les réseaux IP sans fil sont conçus pour supporter des services de données haut débit tout en garantissant la mobilité. Les solutions existantes telles que protocoles Mobile IP et NEMO ont pu résoudre une partie des problèmes liés à cette mobilité, néanmoins de grandes lacunes persistent dans les cas des réseaux imbriqués (nested networks), muti-connectés (multihomed) et maillés (mesh). Dans cette thèse, nous proposons trois nouvelles solutions pour contribuer à améliorer la gestion de la mobilité sur ces réseaux et architectures. La solution Light-NEMO est proposée pour optimiser le routage dans les réseaux mobiles imbriqués et pour réduire la latence du handover. Nous proposons ensuite une nouvelle architecture pour permettre le support des réseaux mobiles multi-connectés par le protocole NEMO. Nous introduisons ensuite la solution "Mobile Party" comme un nouveau mécanisme de routage et de gestion de la mobilité, pour les réseaux sans fil maillés. Les performances des solutions proposées ont été évaluées à l'aide de modèles analytiques et par simulation
The mobility management feature within the new IP-based wireless access Networks is of a great interest. Different from classical cellular systems, new solutions have to be conceived in order to guarantee seamless mobile communications. Even if the Mobile IP/NEMO protocols have succeeded to fulfil the lack of mobility with IP protocol, they suffer from many drawbacks in special situations such as nesting, multihoming and mesh architectures. In this thesis, we propose three solutions to solve the mobility management issues for each of the three environments cited above. The first, Light-NEMO solution, optimize the route established in a nested mobile network context by eliminating the pinball problem and provides a seamless handoff solution. The second proposal enhances the NEMO operation in order to support multihoming in mobile networks. Finally, Mobile Party protocol is a new routing and mobility management scheme for wireless mesh network. The reliability and the efficiency of each of the three solution has been demonstrated by both analytical and simulation studies

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Mitharwal, Pratibha. "A study of IP network mobility in a multihomed context." Thesis, Télécom Bretagne, 2016. http://www.theses.fr/2016TELB0407/document.

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Cette thèse présente une solution pour améliorer la mobilité des réseaux, dans le cadre de communications véhiculaires ainsi que pour la distribution de contenu. Les solutions actuelles pour les communications véhiculaires (c'est-à-dire lorsqu'un réseau est mobile) reposent sur la mise en place de tunnels, permettant également d'utiliser simultanément les différentes interfaces disponibles sur le véhicule (multi-homing). Même avec des tunnels, ces solutions ne sont pas en mesure d'équilibrer le trafic sur les interfaces réseau disponibles, elles ne parviennent pas à tirer partie du multi-homing. De plus, certaines des solutions existantes pour la mobilité de réseau cachent la mobilité aux hôtes connectés au routeur mobile. De fait, cela empêche les hôtes de participer aux décisions relatives au multi-homing, telles que le choix de l'interface réseau à utiliser, ce qui est pourtant utile pour réaliser du routage à moindre coût. Dans cette thèse, nous proposons de combiner un protocole de mobilité réseau (tel que NEMO) avec le protocole de TCP-multivoies (MPTCP), ce qui permet aux nœuds hôtes de participer à la mobilité et au multi-homing. Cette nouvelle combinaison améliore significativement le routage et l'encapsulation de paquets causée par les tunnels. En outre, cela augmente le débit, la tolérance de panne, le temps d'aller-retour et réduit le délai de transmission. La deuxième contribution de ce travail propose une solution de continuité de session pour la distribution de contenu dans les réseaux 5G. Dans le réseau 5G, les équipements d'accès IP seront au plus proche des nœuds terminaux afin d'améliorer l'expérience utilisateur et de réduire la charge de trafic dans le réseau central. Le fait est qu'à un instant donné un terminal ne peut être raccordé qu'à une seule passerelle (SGW/PGW) à la fois. Et comme la passerelle change lors de la mobilité, les sessions en cours seront rompues, impactant les applications temps réelle, le streaming vidéo, les jeux, etc. Pour cela, la thèse présente une solution de continuité de session avec l'aide de TCP-multivoie en bénéficiant du fait que les serveurs de contenu sont stationnaires
This thesis presents a solution for boosting network mobility in the context of vehicular communications and content distribution in fixed network. Existing solutions for vehicular communications (i.e., network mobility), relies on tunneling in order to use multiple available interfaces on a vehicle. Even with tunnels, these solutions are unable to balance the traffic over available network interfaces thus do not reach the goal to provide optimum multi-homing benefits. Moreover, some of the existing solutions for network mobility, hide the mobility from the hosts connected to the mobile router. This in result inhibits the host nodes from participating in multi-homing related decisions such as interface selection which can be helpful in performing least cost routing. In this thesis, we propose to combine network mobility protocol with MPTCP which enables the host nodes to participate in mobility and multi-homing. This novel combination significantly improves routing and tunneling packet overhead. Moreover it increases throughput, fault tolerance, round-trip time and reduces transmission delay. The second contribution of this work is providing a solution for session continuity in context of content distribution in 5G networks. In 5G network, the IP edges will be closer to the host nodes in order to improve the user experience and reduce traffic load in the core network. The fact that a host can only be connected to a single gateway (SGW/PGW) at a time, would break the ongoing sessions for real time applications like video streaming or gaming during an occurrence of mobility event requiring gateway relocation. The thesis presents the solution for session continuity with the help of multipath TCP by benefiting from the fact that the content servers are stationary

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Gurkas, Aydin Gulsum Zeynep. "IP mobility enhancements for heterogeneous wireless networks." Thesis, Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0006/document.

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Au cours des dernières décennies, le besoin pour des communications multimédia en mobilité est devenu indéniable dans les réseaux de type IP, ainsi la gestion de la mobilité et la continuité de session est depuis plusieurs années un problème de recherche très important aussi bien pour le milieu académique qu’industriel. Comme l'hétérogénéité des réseaux d’accès est en perpétuelle évolution, l'intégration des différents types de réseaux sans fil au niveau de la couche IP est devenue un domaine de recherche difficile et inévitable. L'un des problèmes les plus importants liés à l'exécution de la gestion de la mobilité concerne le fait que la couche d'application souffre de la modification d'adresses IP au cours du mouvement du nœud mobile alors que celle-ci construit sa session sur la base de l’adresse IP de connexion au réseau. Une nouvelle approche d'amélioration de la prise en charge de la mobilité propose de séparer l'identification de session et l'identification de l’emplacement ou l’attachement au réseau. Donc, par la séparation de ces deux concepts, les sessions ne sont pas identifiés par les adresses IP qui elles sont dynamiques puisque la mobilité dans le réseau impose le changement d’adresse IP, mais les nouveaux identificateurs uniques qui définissent un nœud et qui ne change pas à cause de la mobilité ce qui offrirait une stabilité pour le niveau applicatif. Selon ces concepts, Host Identity Protocol (HIP) est l'une des solutions dominantes en recherches qui est proposé par l'IETF et l’IRTF. Dans cette thèse, le protocole HIP est principalement examiné et de nouvelles améliorations de la mobilité sur la base de ce protocole ont été conçues et mises en place
Over the last decades, with rapid and tremendous growth of IP networks in mobile and wireless environments, mobility management and session continuity has become a more important issue. As the heterogeneity increases in network environments and gradual spread of Internet of Things wave, the integration of different types of wireless networks in the IP layer became a challenging and inevitable research area. One of the most important issues related to mobility management is related to the fact that the application layer suffers from the changing of IP addresses during the movement of the mobile node. It is expected the network layer and above layers to be aware of movement of mobile nodes. New wave in the improvement ideas on this concept is separating the session identification and the location identification. This avoids the applications to suffer when the IP address changes during the mobility. This new approach needs to introduce a new layer in the TCP/IP protocol stack, on top of the IP layer that will handle the new identifiers correspondent with the current IP address or new complete architecture designs which are inheriting locator/identifier separation idea. According to these concepts, Host Identity Protocol (HIP) is one of the dominant and prominent researches that is proposed by IETF and IRTF. This protocol proposes to solve the locator/identifier split problem by also including the security support. In this thesis, predominantly HIP protocol is examined and new mobility enhancements based on this protocol have been designed and introduced

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Benmammar, Badr. "La gestion dynamique de la qualité de service dans les réseaux IP mobiles." Bordeaux 1, 2006. http://www.theses.fr/2006BOR13160.

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Notre contribution dans le cadre de cette thèse est la proposition d'une nouvelle procédure de réservation de ressources à l'avance dans les réseaux IP mobiles et sans fil. Cette procédure fait appel à un nouvel objet nommé MSpec (Mobility Specification) qui représente lesfutures localisations du terminal mobile. Nous avons proposé un format pour cet objet ainsi qu'un profil de mobilité pour les utilisateurs mobiles qui inclut l'objet MSpec. Ce profil de mobilité découle de l'analyse du comportement de l'utilisateur durant une phase d'observation. Nous avons proposé, également, une extension de ce profil afin de pouvoir gérer le handover vertical (passage d'une technologie d'accès à une autre). Durant la phaase d'observation,l'utilisateur est nouveau et le sytme ne peut donc pas réserver de ressources à l'avance car il ne connaît pas le profil de mobilité de l'utilisateur, et par conséquent le contenu de l'objet MSpec. Sans réservation de ressources à l'avance, nous utilisons la technologie Agent afin d'améliorer la qualité de service demandée par l'utilisateur mobile. Le rôle des agents, dans cette phase, est d'adapter le handover horizontal (passage d'une cellule à une autre en utilisant la même technologie d'accès) et le hadover vertical aux besoins de qualité de service de l'utisateur.

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Benzaid, Mounir. "Utilisation des techniques des réseaux ad-hoc pour l'optimisation de la mobilité dans les réseaux IP." Paris 11, 2004. http://www.theses.fr/2004PA112060.

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Cette thèse s'inscrit dans le cadre des réseaux de communication mobile de 4e génération et se donne comme objectif d'étudier les opportunités d'une mobilité universelle IP. Elle contribue à offrir une solution alternative à l'UMTS. Cette solution, basée totalement sur IP, utilise des réseaux d'accès sans-fil ad-hoc. La thèse aborde trois thèmes majeurs :- La gestion de la macro-mobilité et de la micro-mobilité. Nous avons conçu et implémenté une architecture hiérarchique combinant d'une part IP Mobile pour la gestion de la macro-mobilité et d'autre part le routage ad-hoc pour la gestion de la micro-mobilité. L'idée de base est d'offrir l'équivalent du roaming et du handoff des réseaux cellulaires. Une localisation globale est assurée par IP Mobile et une localisation locale est donnée par OLSR. OLSR, protocole de routage par état des liens pour les réseaux ad-hoc, est basé sur les relais multipoint qui permettent une diffusion optimisée des messages de contrôle. Nous avons montré comment intégrer IP Mobile et OLSR. Notons que cette architecture permet également l'interconnexion des réseaux ad-hoc à Internet. - La faisabilité de l'architecture, ainsi que la coopération entre les protocoles IP Mobile et OLSR ont été démontrées par des tests et des mesures de performances réalisés sur une plate-forme interconnectant plusieurs réseaux ad-hoc. - La gestion de la mobilité rapide. Afin de permettre aux mobiles d'un réseau d'accès OLSR de se déplacer à grande vitesse, avec un surcoût de contrôle raisonnable, nous avons proposé le protocole Fast-OLSR. Les performances de ce protocole ont été évaluées par simulation dans des réseaux de taille moyenne, ainsi qu'à grande échelle
This PhD thesis deals with fourth generation mobile communication networks and aims at studying universal IP mobility. This solution, totally based on IP, uses ad-hoc wireless access networks. This thesis focuses on three main topics:- Macro-mobility and micro-mobility management. We have designed and implemented a hierarchical architecture combining, on the one hand, Mobile IP for macro-mobility management, and on the other hand, ad-hoc routing for micro-mobility management. The basic idea consists in providing the equivalent of roaming and handoff facilities used in cellular networks. Global location is ensured by Mobile IP and local location is given by OLSR. OLSR, link state routing protocol for ad-hoc networks, is based on multipoint relays that ensure optimized flooding of control messages. We have shown how to integrate Mobile IP and OLSR. Notice that this architecture also allows ad-hoc networks to be interconnected to the Internet. - The feasibility of this architecture and the cooperation between Mobile IP and OLSR protocols, have been demonstrated by tests and performance measurements, carried out on a platform interconnecting several ad-hoc networks. - Fast mobility management. In order to allow mobile nodes to move fast will keeping the overhead reasonable, we have proposed the Fast-OLSR protocol. Performances and scalability of Fast-OLSR have been evaluated by simulation

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Zagrouba, Rachid. "Contrôle de la mobilité et de la QoS dans les réseaux cellulaires tout IP." Télécom Bretagne, 2007. http://www.theses.fr/2007TELB0051.

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Cette thèse est consacrée à la gestion de la QoS et de la mobilité dans les réseaux d'accès IP. Elle s'inscrit dans l'optique de la définition d'un réseau radio-mobile tout IP aussi bien au niveau du réseau d'accès que dans le coeur du réseau. Le coeur du réseau est supposé ici construit autour de DiServ et du protocole Mobile IP. Nous nous intéressons donc principalement aux réseaux d'accès et en particulier à la signalisation de la QoS et à la gestion de handover. Le premier travail de cette thèse consiste à étudier les solutions proposées pour la gestion de la QoS et de la mobilité dans un réseau sans fils IP, à en faire l'analyse et à les comparer. Puis, nous définissons les nouveaux défis pour les opérateurs de réseaux sans fils et nous identifions certaines problématiques à résoudre pour mettre en oeuvre la gestion de la QoS et de la mobilité dans les réseaux sans fils IP. Enfin, nous proposons un nouveau protocole afin de fournir un ensemble de scénarios et de fonctions nécessaires pour coupler la gestion de la QoS et de la mobilité. Le protocole proposé, appelé " gestion de la QoS et de la micro mobilité " (Q3M en anglais) permet à un opérateur réseau de maximiser l'utilisation des ressources réseaux, d'améliorer la performance du réseau et de réduire le trafic de signalisation. Le protocole Q3M prend en considération les mécanismes de signalisation et le concept de contrôle par le réseau. L'implémentation du protocole Q3M sur une maquette de mobilité de France Télécom R&D (Rennes) ainsi que les résultats analytiques et des simulations montrent que le protocole Q3M donne de bons résultats en terme de délai d'établissement d'une session de QoS et en terme de probabilité de blocage. Les performances du protocole Q3M présentent des valeurs raisonnables comparées aux autres solutions. Les avantages du protocole Q3M deviennent plus importants lorsque le mobile change fréquemment son point d'attachement et lorsque le réseau est congestionné.
This study deals with QoS and mobility management in the wireless access networks. It is interested in the definition of wireless mobile IP networks both on the access network and the core network. The core network is supposed built on DiffServ and Mobile IP Protocol. We are thus focus mainly in the access network and in particular in the QoS signaling and handover management. The first part of this thesis consists in studying the basic concepts and proposals of QoS and mobility management in wireless IP networks. Then, we give an analysis and comparison of the main frameworks. Next, we define the new challenges for wireless operators and we address some important issues that arise when managing QoS within a wireless IP network. Lastly, we propose a new protocol to provide a set of scenarios and functions needed to couple QoS and mobility management. The proposed protocol, called QoS and Micro Mobility Management (Q3M), enables a network operator to use its network resources more efficiently, increase network performance and minimize signaling traffic. The implementation of Q3M protocol on the France Telecom R&D (Rennes) testbed, as well as the analytical and simulation results, show that Q3M protocol has a good performance in terms of delay establishment of QoS session and blocking probability. The performance of Q3M protocol is very reasonable compared to other related works. The Q3M advantage becomes more important when mobility is high and the network is congested

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Langar, Rami. "Mécanismes de Gestion de la Mobilité et Evaluation de Performance dans les Réseaux Cellulaires tout-IP." Phd thesis, Télécom ParisTech, 2006. http://pastel.archives-ouvertes.fr/pastel-00001871.

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Dans cette thèse, nous proposons différents mécanismes de gestion de la mobilité et de support de qualité de service (QoS) dans les réseaux cellulaires tout-IP. Avant d'entamer nos travaux de recherche, nous examinons et analysons tout d'abord l'architecture des réseaux mobiles tout-IP ainsi que la complexité et les problèmes liés aux performances des protocoles de macro- et micro-mobilité existants. Les résultats de cette analyse seront ensuite exploités pour présenter et discuter nos propositions. L'objectif recherché est d'assurer, au moindre coût, le meilleur support de la mobilité et d'offrir les garanties de QoS exigées par les applications temps réel. Notre solution de base, intitulée ``Micro Mobile MPLS'', repose sur l'intégration du protocole Mobile IP hiérarchique avec le protocole de commutation de labels (MPLS). Outre le support de la QoS, notre architecture est flexible, scalable (résiste au passage à l'échelle) et supporte les modèles Diffserv et Intserv. En effet, les chemins ou LSPs (Label witched Paths) peuvent être établis soit à l'avance par provisioning (on parle dans ce cas de LSPs statiques), soit dynamiquement sur demande (on parle dans ce cas de LSPs dynamiques). Dans un second temps, nous exposons trois variantes protocolaires proposées pour compléter notre solution de base ``Micro Mobile MPLS''. La première variante, intitulée ``FH-Micro Mobile MPLS'', supporte le fast handover pour réduire les perturbations des communications en cours en minimisant le temps de handover. La deuxième variante, intitulée ``FC-Micro Mobile MPLS'', est basée sur une suite de chemins construits dynamiquement pour réduire le coût de signalisation lors des mises à jour de localisation. En effet, en utilisant ce mécanisme, le terminal mobile a la capacité de s'enregistrer auprès de son ancien sous-réseau au lieu du noeud d'entrée du domaine formant ainsi une suite de chemins de tous les sous-réseaux visités. Enfin, la troisième variante protocolaire, intitulée ``MFC-Micro Mobile MPLS'', propose de réduire la charge de signalisation au sein du réseau d'accès en contrôlant dynamiquement le nombre des mises à jour de localisation auprès du noeud d'entrée du domaine. Ceci permet d'assurer une flexibilité et une adaptabilité optimales, en tenant compte des caractéristiques du réseau et de la mobilité des utilisateurs. Tout au long de ce travail, des études de performances, basée sur des analyses théoriques et également sur des simulations ont été réalisées afin d'évaluer l'efficacité de nos propositions. Des modèles de mobilité basés sur des chaînes de Markov sont développés en adoptant des configurations cellulaires à une dimension (1-D) et à deux dimensions (2-D). Les critères de performances utilisés correspondent au coût d'utilisation des liens, au coût de signalisation lors des mises à jour de localisation ou encore coût d'enregistrement, à la latence d'un handover et au taux de perte des paquets. Les résultats de cette analyse ont montré une nette amélioration du délai de handover et du taux de perte des paquets ainsi qu'une réduction importante du coût de signalisation permettant par ailleurs de garantir une bonne qualité de service pour les applications temps réel.

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Badr, Benmammar. "La gestion dynamique de la qualité de service dans les réseaux IP mobiles." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2006. http://tel.archives-ouvertes.fr/tel-00657640.

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Notre contribution dans le cadre de cette thèse est la proposition d'une nouvelle procédure de réservation de ressources à l'avance dans les réseaux IP mobiles et sans fil. Cette procédure fait appel à un nouvel objet nommé MSpec (Mobility Specification) qui représente les futures localisations du terminal mobile. Nous avons proposé un format pour cet objet ainsi qu'un profil de mobilité pour les utilisateurs mobiles qui inclut l'objet MSpec. Ce profil de mobilité découle de l'analyse du comportement de l'utilisateur durant une phase d'observation. Nous avons proposé, également, une extension de ce profil afin de pouvoir gérer le handover vertical (passage d'une technologie d'accès à une autre). Durant la phase d'observation, l'utilisateur est nouveau et le système ne peut donc pas réserver de ressources à l'avance car il ne connaît pas le profil de mobilité de l'utilisateur, et par conséquent le contenu de l'objet MSpec. Sans réservation de ressources à l'avance, nous utilisons la technologie Agent afin d'améliorer la qualité de service demandée par l'utilisateur mobile. Le rôle des agents, dans cette phase, est d'adapter le handover horizontal (passage d'une cellule à une autre en utilisant la même technologie d'accès) et le handover vertical aux besoins de qualité de service de l'utilisateur.

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Belghoul, Farouk. "Mécanismes de Gestion de Mobilité Généralisée dans un Système Hétérogène Fixe/Mobile." Phd thesis, Télécom ParisTech, 2005. http://pastel.archives-ouvertes.fr/pastel-00001320.

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Le support de la mobilité dans les protocoles réseaux existants est devenu primordial, à cause du nombre croissant d'utilisateurs de terminaux mobiles désirant garder une connexion constante au réseau, tout en se déplaçant librement à travers des segments de réseaux d'accès sans fil hétérogènes. Le protocole de routage dominant dans les architectures réseaux filaires est IP "Internet protocole". Ce protocole est en passe de dominer aussi le mode des réseaux sans fils. Ainsi, il est naturel d'introduire des mécanismes de gestion de mobilité basés sur IP, dont un processus de handover (passage d'une point d'accès radio à une autre point) efficace et flexible afin de garantir aux utilisateurs une qualité de service minimale de transmission des donnés. En effet, un handover inefficace génère de la latence, de la gigue et des pertes de paquets. La transmission des données est affectée et dégrade la qualité de services de l'application utilisant les services du réseau. Dans cette thèse, nous examinons et analysons d'abord la complexité et l'efficacité des principales techniques de handover et de gestion de mobilité basée sur IP. Les résultats de cette analyse seront ensuite exploités pour présenter finalement notre proposition de soft handover basé sur IPv6. Cette solution permettra l'extension de mobile IPv6 avec une gestion efficace, transparente et locale du multihoming. Bien sur la duplication des flux est bidirectionnel entre le réseau et le mobile et permet un changement de point d'accès au réseau sans perte de données. Nous analysons ensuite les performances de notre approche à travers des résultats de simulations. Ces simulations sont effectuées dans un simulateur développé par notre équipe nommé Gemini2. Cette partie inclut également une comparaison des performances par rapport au fast handover bicasting et Mobile IPv6 basique. Finalement, le dernier chapitre de la thèse inclut notre expérience de l'implémentation d'un prototype mobile multi interfaces et un testbed mobile IPv6 soft handover. Cette implémentation a comme but principal la validation de nos travaux. Ce banc de test nous permettra, en plus, d'analyser les performances du soft handover dans des conditions réelles et avec différents types d'applications et de flux multimédia.

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Langar, Rami. "Mécanismes de gestion de la mobilité et évaluation de performance dans les réseaux cellulaires tout IP." Paris, ENST, 2006. http://www.theses.fr/2006ENST0012.

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Dans cette thèse, nous proposons différents mécanismes de gestion de la mobilité et de support de qualité de service (QoS) dans les réseaux cellulaires tout-IP. Dans un premier temps, nous présentons notre solution de base, intitulée ``Micro Mobile MPLS'', qui repose sur l'intégration du protocole Mobile IP hiérarchique avec le protocole de commutation de labels (MPLS). Outre le support de la QoS, notre architecture est flexible, scalable et supporte les modèles Diffserv et Intserv. Dans un second temps, nous exposons trois variantes protocolaires proposées pour compléter notre architecture de base. La première variante (FH) supporte le fast handover et réduit les perturbations des communications en cours en minimisant le temps de handover. La deuxième variante (FC) est basée sur une suite de chemins construits dynamiquement pour réduire le coût de signalisation lors des mises à jour de localisation. Enfin, la troisième variante (MFC) propose de réduire la charge de signalisation au sein du réseau d'accès en contrôlant dynamiquement le nombre des mises à jour de localisation auprès du noeud d'entrée du domaine. Ceci permet d'assurer une flexibilité et une adaptabilité optimales, en tenant compte des caractéristiques du réseau et de la mobilité des utilisateurs. Tout au long de ce travail, des études de performances, basée sur des analyses théoriques et également sur des simulations ont été réalisées afin d'évaluer l'efficacité de nos propositions. Des modèles de mobilité basés sur des chaînes de Markov sont développés en adoptant des configurations cellulaires à une dimension (1-D) et à deux dimensions (2-D). Cette étude analytique a pour but la validation de nos travaux
In this thesis, we propose a new micro-mobility management scheme, called Micro Mobile MPLS, that supports both mobility and QoS management in wireless networks. Our approach relies on integrating the Mobile IP Regional Registration and MPLS protocols. The major strength of our proposed scheme is its ability to support both the fast handoff and QoS via traffic engineering path and also to reduce the total signaling cost by controlling dynamically the number of registration updates with the root of the domain. Three protocol variants are then defined. In the first variant (FH), we consider the fast handoff mechanism, which anticipates the LSP procedure setup with an adjacent neighbor subnet that an MN is likely to visit. In the second variant (FC), the forwarding chain concept, which is a set of forwarding path, is provided to track efficiently the host mobility within a domain. Finally, the third protocol variant (MFC) aims to reduce the total signaling cost by controlling dynamically the number of registration updates with the root of the domain according to a cost comparison and using the mobility characteristics of users and network environments. In order to assess the efficiency of our proposals, all underlying protocols are compared through analysis and simulations. Analytical models using Markov chains are developed to evaluate the handoff latency, the link usage and the signaling cost function for both two-dimensional (2-D) and one-dimensional (1-D) mobility models. Numerical and simulation results show that the proposed mechanisms can significantly reduce the registration updates cost and provide low handoff latency and packet loss rate under various scenarios

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Bellahsene, Samir. "Prédistion de la mobilité pour la gestion des handovers dans les réseaux IP : modèles et algorithmes." Versailles-St Quentin en Yvelines, 2012. http://www.theses.fr/2012VERS0018.

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Dans les réseaux cellulaires, la procédure du handover qui consiste à transférer un terminal mobile en communication d'une interface radio vers une autre reste un problème majeur pour la garantie de la continuité des services. Ces handovers qui reposent principalement sur des phases de mesures introduisent des délais proportionnels au nombre de cellules voisines à scanner. En effet, durant la phase du handover, le terminal mobile doit scanner continuellement son voisinage pour déterminer la station de base qui offre la meilleure qualité de signal et de service. Étant donné que les couvertures actuelles sont de plus en plus denses et que, dans le but d'augmenter la capacité des réseaux, les opérateurs optent pour une planification cellulaire avec des cellules de faibles largeurs (ex. Picocells et Femtocells), les temps qu'occupent ces phases de handover deviennent longs et critiques au point de ne pas respecter les contraintes temporelles imposées par les applications mobiles. Dans ce cas, le mobile risque de perdre sa communication avec sa station de base d'origine, avant que la liaison avec la nouvelle station qui offre la meilleure qualité de service ne soit établie. Dans ce contexte et dans le cadre des réseaux mobiles tout IP, à l'image du LTE et du Wimax, nous proposons dans notre thèse une solution fondée sur la prédiction de la mobilité pour anticiper les handovers et garantir la continuité des communications des utilisateurs mobiles. Cette solution qui suppose un apprentissage permanent des mouvements antérieurs de chaque utilisateur, consiste en une approche algorithmique basée sur la théorie des graphes et les chaînes de Markov. Nous définissons deux notions importantes : les profils locaux et les profils globaux. Les profils locaux reposent sur l'hypothèse qu'un utilisateur a toujours tendance à suivre régulièrement les mêmes chemins. Ainsi, un profil local se définit comme une séquence de cellules régulièrement empruntées par l'utilisateur entre deux cellules, la source et la destination. Un profil global se définit comme étant un parcours très fréquenté par plusieurs utilisateurs et il représente la séquence des cellules traversées par ces mêmes utilisateurs entre une cellule source et une autre de destination. La difficulté principale dans cette notion réside dans le fait qu'un profil, local ou global, ne se traduit pas nécessairement dans le graphe de voisinage des cellules par un chemin unique, mais par un ensemble de chemins quasi identiques que nous avons réussi à détecter grâce à la théorie des graphes. Ainsi, le principe de base de notre approche consiste à combiner dans un modèle de prédiction les chaînes de Markov avec la notion de profils locaux et globaux pour prédire les prochains déplacements des utilisateurs dans le réseau. Nous avons présenté un schéma d'implémentation au niveau de l'architecture du LTE qui tient compte de la disposition des entités de gestion de la mobilité et des besoins en termes de la confidentialité des données des utilisateurs. L'évaluation de notre approche a été réalisée en utilisant des données de mobilité réelles. L'analyse de ces données a confirmé la validité de la notion des profils locaux et globaux. La comparaison des taux de réussite des prédictions réalisées avec notre approche et avec les meilleures méthodes trouvées dans la littérature prouvent l'efficacité de notre modèle qui offre des résultats significatifs en termes de prédictions réussies
Service continuity is one of the main quality of service requirements in cellular networks. However, the continuity of user sessions is not always guaranteed as the changes of radio channel, namely handovers, during mobile user movements between the network cells, imposes short session disconnections. Thus, in the case of applications such as multimedia applications where a session discontinuity cannot be transparent to the users, the continuity of a service like VoIP is not guaranteed unless an efficient handover procedure is implemented. The handover procedure consists in handing off a call to a new cell when the mobile user crosses the current-cell boundaries and moves to an adjacent cell while the call is in progress. During this procedure, the mobile terminal should scan all the neighbouring cells to determine the one offering the best quality of signal a service. The coverage density of current mobile networks is often important and, to increase network capacity, mobile operators further deploy cells with small size, like picocells and femtocells. Thus, the time needed by any mobile terminal to scan all its neighbouring cells and classify those offering the best quality of signal and service can be long enough to become a critical issue for service continuity. Consequently, for multimedia applications that require short service interruption time, the number of cells to scan, before a handover is initiated, may play a decisive role in service continuity. In this context and in the case of mobile IP networks, like LTE and Wimax, we propose in this thesis a solution based on mobility prediction to limit the number of cells to scan. The objective is to predict the next cell(s) to be visited by the mobile user. If a unique cell is predicted, no radio signal measurement is needed, otherwise only the predicted cells will be scanned and the one offering the best quality of signal is selected. Thus, mobility prediction allows the network to anticipate the preparation of the handover in the predicted cell, enabling seamless handovers and thus limited call dropping rates. The solution we propose requires regular learning from the past movements of mobile users. It consists on an algorithmic approach based on graph theory and Markov chains. We define the notion of local and global profiles. The local profile is a set of closed sequences of cells the user has the tendency to regularly cross in the same way. Similarly, the global profile is a set of cell sequences often followed by a large number of users. A major difficulty of this approach is that a local or global profile does not necessarily translate into a unique path in the neighbourhood graph of cells, but as a set of paths sufficiently close, that we detect with the use of graph theory. Thus, our mobility prediction model consists in combining the notion of local and global profiles in order to compute the probability of the next moves, and thus predict the next cell of the user. We provide an implementation scheme of this model in LTE architecture. This scheme is aware of the elementary position in the network of the entities dedicated to manage mobility of users. It also takes into account the needs in terms of user data confidentiality. In order to assess the performance of our prediction model, we use data sets from real networks. The analysis of these data approves the validity of our local and global profiles approach. The comparison between prediction accuracies obtained with our prediction model and one of the best models found in the literature proves the efficiency of our prediction approach

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12

Ramirez, Rojas Octavio. "Architectures pour la gestion de la mobilité dans les réseaux IEEE 802. 11." Versailles-St Quentin en Yvelines, 2005. http://www.theses.fr/2005VERS0016.

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The goal of this thesis has been to propose different solutions in order to manage user mobility into 802. 11 networks. In this thesis, we have developed two architectures. At first, we have introduced a secured architecture in order to manage roaming services of mobile nodes in wireless IP networks. The goal of this architecture SMMArc (Service Mobility Management Architecture) was to offer different services according to user profile. The second architecture is focused on the management of persistent TCP connections when mobile node makes handover. This architecture, ATHOMIC (Architecture managing Tcp Handoff Over Mobile Ip Connections) reduces the probability of TCP packet loss when the mobile node changes of IP domains
Le but de cette thèse a été l'étude et la proposition de solutions pour gérer la mobilité de l'utilisateur dans des réseaux utilisant le standard IEEE 802. 11. Dans cette thèse, nous avons développé deux architectures. Dans la première, nous avons introduit une architecture sécurisée pour gérer le roaming des nœuds mobiles dans les réseaux sans fil. Le but de cette architecture SMMArc (Service Mobility Management Architecture) a consisté à offrir des services à l'utilisateur d'après son profil. La deuxième architecture a été développée de manière à gérer des connexions TCP lorsque les nœuds mobiles changent de domaine en cours de communication. Cette architecture ATHOMIC (Architecture managing Tcp Handoff Over Mobile Ip Connections) a permis de réduire la probabilité de perte des segments lorsque les nœuds mobiles changent de domaines IP

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Elleuch, Wajdi. "Mobilité des sessions dans les communications multimédias en mode-conférence basées sur le protocole SIP." Thèse, Université de Sherbrooke, 2011. http://hdl.handle.net/11143/5799.

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Ce mémoire traite la problématique de la mobilité des sessions pour le transfert des communications multimédias basées sur le protocole SIP. Plusieurs aspects sont étudiés et des mécanismes proposés afin de permettre la mobilité des sessions avant, durant et après leur établissement. En plus d'une communication impliquant deux intervenants, Il a été possible d'étendre l'utilisation de la mobilité des sessions pour l'appliquer aux scénarios de communications en mode conférence regroupant plusieurs intervenants. Les mécanismes de mobilité de session développés au cours de cette thèse sont par la suite déployés pour (1) permettre des transformations entre différentes topologies de conférences et (2) construire un modèle de conférence adapté pour l'échange de la voix au sein des groupes de communication à large échelle.

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Naja, Rola. "Gestion de la mobilité et allocation de ressources dans les réseaux multiservices sans fil." Phd thesis, Télécom ParisTech, 2003. http://tel.archives-ouvertes.fr/tel-00005726.

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Avec l'augmentation du nombre d'utilisateurs mobiles et l'évolution rapide des réseaux mobiles sans fil, les demandes des utilisateurs en terme de qualité de service (QoS) deviennent de plus en plus exigeantes. La gestion de la ressource radio est de loin le problème critique des réseaux mobiles sans fil d'autant plus que l'interface radio représente le goulet d'étranglement dans ces réseaux. Dans cette optique, un protocole dallocation de ressources doit pouvoir gérer efficacement la bande passante tout en fournissant la qualité de service à différentes classes de service.
Dautre part, la gestion de la mobilité constitue un important défi technique à relever. En effet, un protocole de mobilité efficace doit empêcher la terminaison forcée de lappel et permettre lexécution des applications dune manière transparente à la mobilité.
Nos travaux réalisés portent sur la gestion des ressources radio et la mobilité dans les réseaux multiservices sans fil. Les environnements qui sont visés dans ce travail concernent les réseaux de seconde, troisième et quatrième génération.
Dans un premier temps, nous avons proposé et étudié un contrôle d'admission multiservice servant quatre classes de service. Deux types d'ordonnancement: HOL (Head of the Line) et QLT (Queue Length Threshold) ont été mis en place afin d'ordonnancer les requêtes handover en attente. L'analyse des performances prouve que le schéma proposé avec QLT améliore la qualité de service des données sans pour autant induire une dégradation perceptible de la qualité de service de la voix.
Dans un second temps, nous avons proposé une architecture dynamiquement adaptable DYNAA dont le but est d'absorber les fluctuations du réseau en terme de capacité en introduisant de la dynamique dans la gestion de ces ressources. Grâce à l'adaptabilité introduite par DYNAA, la QoS de bout en bout est élaborée conjointement entre l'application et le réseau afin de respecter le contrat de service établi avec l'utilisateur.
Puisque les réseaux publics d'accès mobile sont en train d'évoluer rapidement vers une définition de réseau entièrement IP, nous avons poursuivi nos études et mis l'accent sur les problèmes de handover et de routage dans le sens montant dans les réseaux Cellular IPv6. Ensuite, nous nous sommes focalisés sur la gestion de la qualité de service dans le même environnement. L'étude est menée au moyen de l'architecture DYNAA déjà étudiée et permet de très bons résultats en couplant une utilisation du protocole de type DiffServ dans le réseau coeur et IntServ dans le réseau d'accès. Cette étude constitue une bonne approche de l'appréhension de la qualité de service de bout en bout.
Une autre contribution dans notre thèse concerne la qualité de service dans les réseaux IEEE 802.11. Ainsi, nous avons proposé un mécanisme au niveau de la couche MAC, nommé P3-DCF qui introduit une bonne différentiation de service.
Enfin, nous avons abordé les réseaux UMTS où nous avons étudié la couche MAC. Cette étude nous a permis d'analyser le trafic Web et de tirer des règles de dimensionnement des réseaux UMTS.

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Zhang, Xiaofei. "Contrôle de transmission multi-chemin et gestion de mobilité pour protocoles de transport multihoming." Paris 6, 2012. http://www.theses.fr/2012PA066130.

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Un terminal mobile d'aujourd'hui possède plusieurs interfaces des réseaux. Ces interfaces pourraient être connectées aux différents réseaux et obtenir plusieurs adresses IP. Le terminal transmet les données sur ces interfaces en parallèle. Nous étudions les problèmes multihoming à la couche transport pour améliorer la performance de bout en bout. En outre, la coordination entre le multihoming et la gestion de mobilité est étudiée ce qui nous permet de proposer la gestion de mobilité coopérative. D'abord, nous proposons une solution inter-couches pour l'optimisation des performances avec l'extension Concurrent Multipath Transfer (CMT) de SCTP dans les réseaux sans fil. Deux paramètres, Frame Error Rate (FER) à la couche liaison et Round Trip Time (RTT) à la couche transport sont utilisés pour évaluer les conditions des chemins. Les résultats montrent que notre proposition améliore les débits. Deuxièmement, nous nous concentrons sur les liens hétérogènes sans fil. Nous choisissons le filtre de Kalman pour estimer les conditions des chemins. Les résultats ont montré que notre proposition réduit le degré de déséquencement et augmente le débit total. Enfin, une architecture de la gestion de la mobilité coopérative est proposé pour le Post-IP. Les caractéristiques de multihoming sont analysés afin de présenter la proposition de Multihoming-based Cooperative Mobility Management (MCMM). Notre proposition optimise le délai de handover dans les réseaux hétérogènes. Notre proposition est implémenté en C++. Les résultats expérimentaux montrent que le délai de handover peut être réduit par l'envoi des messages de mise à jour via l'interface correspondant au chemin le plus rapide
Most of mobile devices today are equipped with multiple network interfaces that could be connected to different network and obtain multiple IP addresses. In this dissertation, we investigate the multihoming problems at transport layer to improve the end-to-end performance in wireless networks. Moreover, the coordination between multihoming and mobility management is studied which permit us to propose a cooperative mobility management for an environment Post-IP. Firstly, we propose a cross-layer solution for performance optimization with the Concurrent Multipath Transfer (CMT) extension of SCTP in wireless networks. Two parameters, Frame Error Rate (FER) at the link layer and Round Trip Time (RTT) at the transport layer are used to evaluate the path conditions. The simulation results show that our proposal improves the goodput. Secondly, we focus on the heterogeneous wireless links. We chose Kalman filter for the estimation of path conditions. The simulation results show that our proposal reduces the reordering degree and increases the total goodput. Finally, a cooperative mobility management architecture is proposed for Post-IP. Multihoming and end-to-end features are analyzed to present the proposal of Multihoming-based Cooperative Mobility Management (MCMM). The cooperative mobility management optimizes the handover delay in the heterogeneous access networks. The MCMM is implemented in C++ under Linux with a test-bed. The experimental results show that the handover delay can be reduced by sending update messages over the interface of the fastest path

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Le, Grand Gwendal. "Qualité de service dans des environnements Internet mobile." Paris 6, 2001. http://www.theses.fr/2001PA066140.

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Zouari, Anis. "Contrôle de la mobilité et de la qualité de service entre des réseaux d'accès hétérogènes dans un réseau de coeur tout IP." Télécom Bretagne, 2009. http://www.theses.fr/2008TELB0092.

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L'utilisation d'Internet doit pouvoir se faire en confiance pour l'utilisateur, mais cette sécurité a un coût pour les FAIs (Fournisseurs d'Accès à Internet) en terme de consommation de la bande passante et de calcul du matériel cryptographique. Dans un contexte de mobilité, cette sécurité doit être remise en place après chaque déplacement et pour chaque client. Ainsi, un nouveau type de mécanisme a vu le jour dans les instances de standardisation : le transfert de contexte. Celui-ci a pour but de transmettre, d'un équipement à un autre, les données adéquates pour que les services rendus n'aient pas de discontinuités. Ce mécanisme pourrait être un atout pour un opérateur car il lui permettrait d'assurer le même niveau de sécurité pendant les déplacements des usagers dans le réseau tout en ayant des coûts aussi bas que possible. Dans ce travail de thèse, nous avons utilisé le protocole CXTP (Context Transfer Protocol) défini à l'IETF (Internet Engineering Task Force) pour transférer des contextes de sécurité entre routeurs d'accès. Après une analyse pratique en utilisant l'outil AVISPA et une autre plus conceptuelle, nous avons prouvé que ce protocole n'est pas exempt de failles de sécurité. Nous avons donc défini une première solution destinée à combler ces failles, mais celle-ci dégrade les performances du transfert de contexte. Nous avons alors proposé une deuxième solution basée sur les adresses générées de manière cryptographique qui garantit le même niveau de sécurité que la première solution tout en étant aussi efficace que la spécification originelle de CXTP. Nous avons ensuite présenté deux cas d'utilisation du transfert de contexte pour la sécurité : PANA et IPsec. Dans le premier cas, nous avons isolé le contexte PANA et montré comment il peut être transféré avec CXTP. Dans le second cas, nous avons isolé les quatre contextes IPsec (SAD, SPD, PAD et IKE) et implémenté le transfert de contexte IPsec/IKEv1 par le protocole CXTP afin d'obtenir des résultats concrets. Les mesures de performances montrent que le transfert de contexte peut réduire de manière drastique le temps nécessaire au réétablissement d'un tunnel IPsec après déplacement du mobile. Nous avons également proposé une solution de gestion des collisions de SPIs après déplacement du mobile en utilisant MOBIKE lorsque les associations sont mises en place grâce à IKEv2. Nous avons montré que certains problèmes peuvent survenir après le déplacement d'un contexte, et qu'il est généralement nécessaire qu'il soit reconfiguré. Enfin, nous avons comparé par simulation le transfert de contexte et la pré-authentification pour PANA dans l'environnement OMNeT++. Même si les résultats obtenus montrent que le transfert de contexte permet d'obtenir de meilleures performances, nous pensons que les deux mécanismes sont complémentaires.

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18

Ouakil, Laurent. "Filtrage et qualité de service pour la téléphonie sur IP dans une architecture de gestion par politique dédiée au nomadisme et à la mobilité." Paris 6, 2006. http://www.theses.fr/2006PA066542.

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La téléphonie sur IP s’impose progressivement comme une alternative à la téléphonie traditionnelle par circuits. Mais la technologie doit être à la hauteur de ce à quoi elle se substitue. Or, les contraintes de la téléphonie sur IP sont difficiles à maîtriser et dans un environnement sans fil où le réseau lui-même est instable. Cette thèse examine cette problématique et propose des solutions pour améliorer la gestion des flux de téléphonie sur IP en entreprise. Nous analyserons les contraintes et architectures de la voix sur IP en sans fil. Nous mettrons alors en évidence deux problèmes: le filtrage des flux multimédias et la qualité de service. Nous définirons alors une architecture de contrôle, dédiée aux services, et conforme aux besoins de la téléphonie sur IP. Cette architecture sera ensuite exploitée pour optimiser les ressources de traitement sollicitées par le filtrage. Finalement, nous concluons par une proposition d’un mécanisme de qualité de service basé sur le filtrage.

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Wongsaardsakul, Thirapon. "P2P SIP over mobile ad hoc networks." Phd thesis, Institut National des Télécommunications, 2010. http://tel.archives-ouvertes.fr/tel-00712171.

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This work presents a novel Peer to Peer (P2P) framework for Session Initiation Protocol (SIP) on Mobile Ad Hoc Network (MANET). SIP is a client-server model of computing which can introduce a single point of failure problem. P2P SIP addresses this problem by using a distributed implementation based on a P2P paradigm. However, both the traditional SIP and P2P SIP architectures are not suitable for MANETs because they are initially designed for infrastructured networks whose most nodes are static. We focus on distributed P2P resource lookup mechanisms for SIP which can tolerate failures resulting from the node mobility. Our target application is SIP-based multimedia communication in a rapidly deployable disaster emergency network. To achieve our goal, we provide four contributions as follows. The first contribution is a novel P2P lookup architecture based on a concept of P2P overlay network called a Structured Mesh Overlay Network (SMON). This overlay network enables P2P applications to perform fast resource lookups in the MANET environment. SMON utilizes a cross layer design based on the Distributed Hashing Table (DHT) and has direct access to OLSR routing information. Its cross layer design allows optimizing the overlay network performance during the change of network topology. The second contribution is a distributed SIP architecture on MANET providing SIP user location discovery in a P2P manner which tolerates single-point and multiple-point of failures. Our approach extends the traditional SIP user location discovery by utilizing DHT in SMON to distribute SIP object identifiers over SMON. It offers a constant time on SIP user discovery which results in a fast call setup time between two MANET users. From simulation and experiment results, we find that SIPMON provides the lowest call setup delay when compared to the existing broadcast-based approaches. The third contribution is an extended SIPMON supporting several participating MANETs connected to Internet. This extension (SIPMON+) provides seamless mobility support allowing a SIP user to roam from an ad hoc network to an infrastructured network such as Internet without interrupting an ongoing session. We propose a novel OLSR Overlay Network (OON), a single overlay network containing MANET nodes and some nodes on the Internet. These nodes can communicate using the same OLSR routing protocol. Therefore, SIPMON can be automatically extended without modifying SIPMON internal operations. Through our test-bed experiments, we prove that SIPMON+ has better performance in terms of call setup delay and handoff delay than MANET for Network Mobility (MANEMO). The fourth contribution is a proof-of-concept and a prototype of P2P multimedia communication based on SIPMON+ for post disaster recovery missions. We evaluate our prototype and MANEMO-based approaches through experimentation in real disaster situations (Vehicle to Infrastructure scenarios). We found that our prototype outperforms MANEMO-based approaches in terms of call setup delay, packet loss, and deployment time.

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Kassar-Ben, Jemaa Meriem. "Gestion du handover vertical dans les réseaux sans fil hétérogènes." Paris 6, 2009. http://www.theses.fr/2009PA066742.

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Cette thèse se base sur le besoin pour un utilisateur mobile d'accéder à ses services IP en tout lieu, à tout moment et de la meilleure manière possible (ABC, Always Best Connected). Elle étudie une architecture d'Interworking 3G/UMTS-WLAN en couplage loose pour faire coopérer des réseaux sans fil hétérogènes. Cette architecture, prouvée par sa faisabilité et sa simplicité, se base sur le protocole Mobile IP afin de gérer la mobilité des utilisateurs pour une continuité de service. Cette thèse propose un schéma de gestion du handover contrôlé par le mobile que nous intégrons à l'architecture d'Interworking dans un contexte multi-opérateurs en collaboration, répondant aux besoins des utilisateurs mobiles d'une part, et assurant la continuité de service d'autre part. Ce schéma, efficace et intelligent, collecte les informations nécessaires, décide du besoin d'initier le handover en temps opportun à l’aide d’un système de logique floue, choisit le réseau le plus approprié parmi les réseaux d'accès hétérogènes disponibles à l’aide d’un processus AHP (Analytic Hierarchy Process). Pour une solution de type seamless, la procédure d'exécution du handover, basée sur une combinaison Mobile IP-AAA, est préparée grâce à la stratégie élaborée de la décision du handover au niveau du terminal mobile

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Vatn, Jon-Olov. "IP telephony : Mobility and security." Doctoral thesis, Stockholm : Telecommunications Systems Laboratory, Dept. of Microelectronics and Information Technology (IMIT), KTH, Royal Institute of Technology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260.

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Boukis, Konstantinos. "Terminal reconfigurability on IP mobility protocols." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433597.

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Mihailovic, Andrej. "Mobility support for IP-based wireless networks." Thesis, King's College London (University of London), 2004. https://kclpure.kcl.ac.uk/portal/en/theses/mobility-support-for-ip--based-wireless-networks(b643754c-5730-4c62-a323-f5bf17768e89).html.

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Moodie, Myron L., Maria S. Araujo, Todd A. Newton, Ben A. Abbott, and Thomas B. Grace. "Accomplishing Seamless IP Mobility in iNET Systems." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595612.

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ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada
One of the core philosophies of the integrated Network Enhanced Telemetry (iNET) project is to leverage standard networking technologies whenever possible to both reduce development cost and to allow standard networking applications to function. This also provides the best long-term scalability to new unforeseen applications, much as the Internet has grown through its open standards. Unfortunately, the radio frequency (RF) channel characteristics do not fully lend themselves to the typical physical layer approaches utilized by IP technologies. As such, the iNET program has developed a specialized communication link management control. But, combining this specialized link management approach with the standardized IP infrastructure on the range and test article provides some challenges. The program has chosen a method to encapsulate the special concepts within a set of components that together (at their boundaries) form a classic router. Construction of this router is quite unique in that portions of it are geographically separate: antenna sites, test article, and mission control room. This paper describes the construction of what the program calls a "virtual router" and explains the performance issues that required it.

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Condeixa, Tiago Silvestre. "Decentralizing IP mobility management in future networks." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14853.

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Doutoramento em Engenharia Electrotécnica
The massive adoption of sophisticated mobile devices and applications led to the increase of mobile data in the last decade, which it is expected to continue. This increase of mobile data negatively impacts the network planning and dimension, since core networks are heavy centralized. Mobile operators are investigating atten network architectures that distribute the responsibility of providing connectivity and mobility, in order to improve the network scalability and performance. Moreover, service providers are moving the content servers closer to the user, in order to ensure high availability and performance of content delivery. Besides the e orts to overcome the explosion of mobile data, current mobility management models are heavy centralized to ensure reachability and session continuity to the users connected to the network. Nowadays, deployed architectures have a small number of centralized mobility anchors managing the mobile data and the mobility context of millions of users, which introduces issues related to performance and scalability that require costly network mechanisms. The mobility management needs to be rethought out-of-the box to cope with atten network architectures and distributed content servers closer to the user, which is the purpose of the work developed in this Thesis. The Thesis starts with a characterization of mobility management into well-de ned functional blocks, their interaction and potential grouping. The decentralized mobility management is studied through analytical models and simulations, in which di erent mobility approaches distinctly distribute the mobility management functionalities through the network. The outcome of this study showed that decentralized mobility management brings advantages. Hence, it was proposed a novel distributed and dynamic mobility management approach, which is exhaustively evaluated through analytical models, simulations and testbed experiments. The proposed approach is also integrated with seamless horizontal handover mechanisms, as well as evaluated in vehicular environments. The mobility mechanisms are also speci ed for multihomed scenarios, in order to provide data o oading with IP mobility from cellular to other access networks. In the pursuing of the optimized mobile routing path, a novel network-based strategy for localized mobility is addressed, in which a replication binding system is deployed in the mobility anchors distributed through the access routers and gateways. Finally, we go further in the mobility anchoring subject, presenting a context-aware adaptive IP mobility anchoring model that dynamically assigns the mobility anchors that provide the optimized routing path to a session, based on the user and network context. The integration of dynamic and distributed concepts in the mobility management, such as context-aware adaptive mobility anchoring and dynamic mobility support, allow the optimization of network resources and the improvement of user experience. The overall outcome demonstrates that decentralized mobility management is a promising direction, hence, its ideas should be taken into account by mobile operators in the deployment of future networks.
Na última década verificou-se uma massificação dos dispositivos móveis e das suas aplicações, o que tem vindo a aumentar o consumo de dados móveis. Este aumento dificulta o planeamento e dimensionamento das redes devido principalmente aos modelos extremamente centralizados adoptados por estas. Os operadores móveis têm vindo a estudar modelos mais até para as redes, os quais distribuem a responsabilidade de fornecer conectividade e mobilidade, no sentido de melhorar a escalabilidade e desempenho da rede. Além disso, de forma a garantir um desempenho elevado na entrega dos conteúdos, os fornecedores de serviço têm vindo a mover os servidores de conteúdos para locais mais próximos do utilizador. Apesar do esforço na procura de soluções para o crescente consumo de dados móveis, os modelos atuais de gestão de mobilidade são demasiado centralizados para conseguir assegurar a continuidade de sessão aos utilizadores conectados à rede. As arquiteturas implementadas têm um número muito reduzido de âncoras móveis centralizadas que gerem todos os dados móveis e a informação de contexto da mobilidade, o que leva a uma diminuição de desempenho e escalabilidade, solucionadas através de mecanismos de rede dispendiosos. A gestão da mobilidade precisa de ser repensada de forma a poder lidar com arquiteturas de rede até com a distribuição dos servidores de conteúdos para nós mais próximos dos utilizadores, que é o objectivo principal da Tese apresentada. Primeiro, é apresentada a caracterização da gestão de mobilidade em blocos funcionais, a interação entre eles e potenciais agrupamentos dos mesmos. A gestão da mobilidade descentralizada é estudada através de modelos analíticos e simulações, em que diferentes abordagens distribuem as funcionalidades da mobilidade pela rede. Como resultado deste estudo verificou-se que a descentralização da mobilidade traz vantagens claras. Com base nestes resultados foi proposta uma nova abordagem de gestão de mobilidade distribuída e dinâmica, que é exaustivamente avaliada através de modelos analíticos, simulações e experiências numa bancada de testes. A abordagem proposta é também integrada com mecanismos de handovers horizontais transparentes, assim como é avaliada em ambientes veiculares. Os mecanismos de mobilidade da abordagem proposta são também especificados para cenários de multihoming, de forma a proporcionar o offloading de dados com suporte de mobilidade das redes celulares para outras redes de acesso. Com o objectivo de optimizar o encaminhamento de dados móveis, foi criada uma nova estratégia para o suporte da mobilidade localizada, em que um sistema de replicação de bindings é integrado nas âncoras de mobilidade distribuídas através dos routers de acesso e dos gateways. Finalmente apresenta-se um modelo de ancoramento adaptativo para a mobilidade com base em contexto, o qual dinamicamente determina as âncoras de mobilidade que oferecem a melhor rota para uma dada sessão, baseado na informação do utilizador e da rede. A integração de conceitos de dinamismo e de distribuição na gestão da mobilidade, como o ancoramento adaptativo e o suporte dinâmico da mobilidade, permitem a optimização dos recursos da rede e uma melhor experiência por parte do utilizador. Os resultados demonstram, de uma forma geral, que a gestão descentralizada da mobilidade é um caminho promissor, logo este deve ser tomado em consideração pelas operadoras móveis aquando do desenvolvimento das redes do futuro.

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26

Chew, Kar Ann. "Mobility management in all-IP mobile network." Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/842897/.

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With convergence of the Internet and mobile telecommunications, mobile networks are taking more and more IP-based protocols onboard. Mobile networks are expected to evolve and become IP-based packet data networks with various fuctionalities supported by IP-based protocols. This thesis investigates IP protocols for mobility management an all-IP mobile network. The design principles of mobility management in packet data network are first explored by studying GPRS. It is realised that GPRS is only an emulated IP network and lacks of the flexibility of IP networks. Packet scheduling techniques for enhancing mobility management performance and its implementation in GPRS are also studied. Evolution of GPRS to an all-IP based network, in which IP protocols can be used for mobility management, is subsequently proposed. Mobility management protocols in IP networks can be segregated into inter-domain (or macro) mobility, intra-domain (or micro) mobility and mobile ad hoc networking. Mobile IP is a proposal by the IETF as a solution to support mobility of IP terminal. In addition, SIP has been extended by research community to support terminal mobility. Both Mobile IP and extended SIP are compared for their ability to support mobility. It is found that Mobile IP is more suitable for supporting terminal mobility. However, Mobile IP is not sufficient for supporting intra-domain and high-speed mobility. An optimised solution therefore consists of Mobile IP and a specialised intra-domain mobility scheme. Having identified the characteristics and design principles of various existing inti-a-domain mobility protocols, a novel protocol known as Mobility-Aware Routing Protocol, MARP, is proposed. It is compared to some existing protocols and is proven to be superior in term of better handoff support, flexibility in packet routing and scalability. Mobile ad hoc networks are expected to be integral part of all-IP mobile network. Interworking of ad hoc and infrastructure-backed mobile networks enables extension of wireless networks coverage and provision of Internet access to mobile node with relaying. Key issues related to such a hybrid networking topology, in the context of ad hoc IP routing protocol and mobility management protocol, are identified. Mechanisms that allow interworking of mobility protocols and ad hoc routing protocols are designed. Interworking of both protocols significantly increases capability of ad hoc mobile nodes to interact with fixed network elements, but is at the cost of high control overhead. Effective techniques for reducing control overhead in the hybrid network is subsequently proposed.

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Wei, Huang, and Wu Weiling. "MOBILITY MANAGEMENT IN IP-BASED SPACE NETWORK." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604804.

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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, Nevada
This paper tries to discuss the mobility management when Internet technology is applied along the whole path from spacecraft to ultimate customers in ground. In addition to Mobile IP protocol, micromobility solution is introduced during cross-support. Those competing micromobility solutions in mobile network research area are compared to select one that is most suitable to space network topology characteristics and operation traditions. Other issues are also taken into account, such as deployment and compatibility with Mobile IP when cross-support is not provided. Simulation comparison for hand-off performance with and without micro-mobility solution during cross-support is presented to justify our proposition.

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So, Yick Hon Joseph, and joseph so@rmit edu au. "Wireless IP Network Mobility Management: Advancing from Mobile IP to HIP-Based Network." RMIT University. Electrical and Computer Engineering, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090507.123036.

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Wireless networking introduces a whole range of challenges to the traditional TCP/IP network. In particular, IP address the issue of overloading because IP addresses are used as a network locator and an end point identity in the different layers in an OSI model. Even though Mobile IP is widely deployed, it has significant problems relating to performance and security. The Host Identity Protocol (HIP) provides secure mobility management by solving the IP address overloading from another angle. It restructures the TCP/IP model and introduces a new layer and a new namespace. The performance of HIP has proven to be better than Mobile IP and also opens a range of new research opportunities. This dissertation proposes and analyses a new step-stone solution from the Mobile IP-based network into a HIP-based network. The main advantage of this new solution is that much less change is required to the operating system kernel of the end point compared to a full HIP implementation. The new step-stone solution allows Mobile IP to use some HIP features to provide better security and handover performance. This dissertation also proposes several new and novel HIP-based wireless communication network architectures. An HIP-based heterogeneous wireless network architecture and handover scheme has been proposed and analysed. These schemes limit the HIP signalling in the wireless network if no communication to external networks is needed. Beside the network architecture modification, the hybrid Session Initial Protocol (SIP) and HIP-based Voice over IP (VoIP) scheme is proposed and analysed. This novel scheme improves the handover latency and security. This dissertation also proposes and analyses a new and novel extension to HIP, a HIP-based micro-mobility management, micro-HIP (mHIP). mHIP provides a new secure framework for micro-mobility management. It is a more complete HIP-based micro-mobility solution than any other proposed in existing studies. mHIP improves the intra-domain handover performance, the security, and the distribution of load in the intra-domain handover signalling. The new work presented opens up a number of very interesting research opportunities.

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Wang, Meng. "Mobility management protocols for All-IP cellular networks." Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.548368.

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Ernest, Petro Pesha. "Distributed IP mobility management for hosts and networks." Doctoral thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/8682.

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Includes bibliographical references.
The Internet was originally designed for stationary nodes. With the advancement of mobile nodes (such as smartphones and tablets) that have wireless Internet access capability, the original design of the Internet is no longer sufficient. These mobile nodes are capable of communicating while moving and changing their point of attachment in the Internet. To maintain communication session(s) continuity for these mobile nodes, the Internet needs mobility management mechanisms. The main mobility management protocols standardised by the Internet Engineering Task Force (IETF) are mobile IP (MIPv6 and MIPv4) and their numerous extensions and variants, including proxy MIP (PMIPv6 and PMIPv4). The architectural structures of these protocols employ a centralized mobility anchor to manage the mobility of the mobile nodes in the control and data planes. The mobility anchor manages the mobility binding information and the forwarding of data packets for all mobile nodes registered in the network. However, in the context of the rapid growth in the number of mobile users and the data traffic volume, as well as the trend towards a flat architecture in mobile networks, the centralized mobility management approach provides insufficient mobility support to the mobile nodes. For example, to manage the demand for increased mobile users, a huge amount of data traffic will be pushed to the centralized mobility anchor. Yet, routing huge volumes of traffic via the centralized mobility anchor can be non-optimal in terms of routing efficiency. Thus, the centralised mobility anchor can be a potential bottleneck, and a single point of failure. Consequently, failure of the mobility anchor may lead to a service outage for a large number of mobile nodes. Ultimately, the centralized mobility management approach does not scale well with the increase in number of mobile users and the data traffic volume. These problems are also costly to resolve within the centralized mobility management approach and its related centralized network architecture. Distributed mobility management (DMM) is one recent approach that can efficiently address the shortcomings of centralized mobility management. It provides an alternative paradigm for developing IP mobility management â€“ without employing centralized mobility anchors. In this paradigm, either the mobility anchors, or their mobility management functions, are distributed to different networks/elements. The mobility anchors, or the mobility management functions, are brought to the edge of the networks, which is closer to the mobile nodes. Distributed mobility management also offers dynamic mobility features that allow a mobile node to anchor traffic at different mobility anchors. However, to date, mobility management schemes that have been developed based on the DMM approach are still in the preliminary stages, and there is no current standard in place. These developed DMM schemes are still experiencing problems, such as long routing paths, especially for long-lasting data traffic, a lack of route optimization for ongoing communication, and a lack of synchronization of the mobile nodesâ€Ÿ location in different networks. Moreover, the majority of these proposed schemes still need to be analysed, in order to quantify their feasibility. The thesis proposes three novel network-based distributed mobility management schemes, which are based on the DMM approach. The schemes enhance PMIPv6 to work in a distributed manner, in order to address the problems of centralized mobility management. Furthermore, the schemes address the following issues: (1) the lack of route optimization for ongoing communication; (2) the lack of synchronization of the mobile nodesâ€Ÿ location in different networks; and (3) the long end-to-end packet delivery delay problems in recently proposed DMM schemes. The first scheme, called the network-based distributed mobility management scheme with routing management function at the gateways (DM-RMG), decomposes the logical mobility management functions of the Local Mobility Anchor (LMA) in PMIPv6 into internetwork location management (LM), routing management (RM), and home network prefix allocation (HNP) functions. After the decomposition, the RM function is collocated at the gateways of different networks. In this way, the data-plane routing function of the respective mobile nodes is served by the corresponding local RM function at the network gateway. The DM-RMG scheme offers distributed mobility management for individual mobile nodes (i.e., mobile hosts) during mobility events. DM-RMG also implements a mechanism to optimize the handover delay. The results obtained from analytical modelling and simulation show that the DM-RMG scheme outperforms the centralized mobility management schemes, as well as currently proposed distributed mobility management schemes in terms of the end-to-end packet delivery delay under different network load conditions. The optimized handover performance of the DM-RMG scheme, investigated under different traffic patterns and mobile node speeds, shows that the scheme also mitigates the internetwork handover delay and packet loss. The second proposed scheme, called network-based distributed mobility management for the network mobility (NDM-RMG), uses a similar approach to DM-RMG. However, it proposes a network-based DMM scheme for Network Mobility (NEMO). The main goal of the NDMRMG scheme is to address the problems of centralized mobility management protocols for NEMO, including the pinball routing problem in nested NEMO. NDM-RMG is compared with centralized mobility management schemes for NEMO, and recently proposed distributed IP mobility management schemes for NEMO by means of analytical modelling and simulation evaluations. NDM-RMG shows better performance in terms of reducing the packet delivery latency, the size of the packet header, and the packet overhead experienced over the wireless link. The third proposed scheme, called network-based distributed mobility management scheme with RM and HNP allocation functions distributed to the access routers (DM-RMA), distributes the RM and the HNP allocation functions at the access routers with the mobility client function. This brings the mobility-related functions closer to the mobile nodes, that is, to the edge of the network. An analytical model is developed to investigate the mobility cost performance of the scheme, due to signalling, packet delivery, and tunnelling. The analytical results indicate that DM-RMA performs better than the previous DMM schemes in terms of packet delivery, tunnelling and total costs. Network simulator-2 (ns-2) is used to model the DM-RMA scheme. The simulated scenarios confirm that DM-RMA performs better than other proposed DMM schemes in terms of reducing the location update latency at the location managers, end-to-end packet delivery delay, handover delay, and packet loss. In addition to the three proposed DMM schemes, this thesis proposes a routing optimization scheme for PMIPv6. The main goal of this scheme is to enable PMIPv6 to offer route optimization to mobile nodes in a PMIPv6 domain. The scheme reduces the route optimization-establishment latency, the packet delivery latency, and the packet loss. Using ns-2 simulations and considering different simulated scenarios, the results show that the scheme reduces route optimization-establishment latency and delayed packets during the route optimization operation, as compared to previously proposed PMIPv6 route optimization schemes. The results also show that the scheme reduces packet loss when a mobile node undergoes handover in the PMIPv6 domain.

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Bergh, Andre E. "Prediction assisted fast handovers for seamless IP mobility." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/5248.

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Includes bibliographical references (leaves 94-98).
This research investigates the techniques used to improve the standard Mobile IP handover process and provide proactivity in network mobility management. Numerous fast handover proposals in the literature have recently adopted a cross-layer approach to enhance movement detection functionality and make terminal mobility more seamless. Such fast handover protocols are dependent on an anticipated link-layer trigger or pre-trigger to perform pre-handover service establishment operations. This research identifies the practical difficulties involved in implementing this type of trigger and proposes an alternative solution that integrates the concept of mobility prediction into a reactive fast handover scheme.

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32

Li, Zhaojun. "Mobility management for beyond 3G all-IP networks." Thesis, University of Surrey, 2006. http://epubs.surrey.ac.uk/842805/.

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The rapid growth of Internet and increased demand for ubiquitous wireless access in recent years have led to intense research activities towards the design of all IP wireless networks. The convergence of the wireless evolutionary systems and the Internet aims to offer seamless IP multimedia services to mobile hosts across a variety of heterogeneous access technologies such as UMTS Terrestrial Radio Access Network, Wireless LANs and emerging 4G systems. This will meet the demands of both enterprise and public environments, anywhere and anytime. One of the research challenges for next-generation all-IP wireless systems is the design of the intelligent mobility management techniques that take advantage of IP-based technologies to achieve global roaming among heterogeneous networks. This thesis addresses mobility management issues in the evolving all-IP wireless networks, namely beyond 3G networks, with particular-emphasis on inter-system handover management and location management. The cross-layer solutions for vertical handover management are considered with special focus on seamless IP Multimedia service continuity. A novel cross-layer signalling design is proposed to enable the communication between Mobile IP and SIP, which enhances the mobility support for real time multimedia services in pure IP wireless networks. Having carefully investigated the seamless IP Multimedia service continuity support in UMTS-WLAN interworking scenarios, an improved cross-layer solution is proposed and analysed, which is designed for better coordination between the link layer, network layer and application layer. The location management strategies in UMTS and future networks are studied. An improved local anchor scheme is proposed for UMTS networks for reducing the signalling cost. An analytical model is developed to investigate the performance of the inactivity counter mechanism proposed in 3GPP, followed by the proposal of a novel scheme that can be used to reduce the overall location management cost for users in PMM-Idle state. In addition a novel cell-mapping mechanism is proposed as a location management solution in UMTS-WLAN interworking architecture.

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33

Persaud, Rajendra. "Core network mobility: active MPLS." Aachen : Shaker, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?idn=981656382.

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34

Mussabbir, Qazi Bouland. "Mobility management across converged IP-based heterogeneous access networks." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/4666.

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In order to satisfy customer demand for a high performance “global” mobility service, network operators (ISPs, carriers, mobile operators, etc.) are facing the need to evolve to a converged “all-IP” centric heterogeneous access infrastructure. However, the integration of such heterogeneous access networks (e.g. 802.11, 802.16e, UMTS etc) brings major mobility issues. This thesis tackles issues plaguing existing mobility management solutions in converged IP-based heterogeneous networks. In order to do so, the thesis firstly proposes a cross-layer mechanism using the upcoming IEEE802.21 MIH services to make intelligent and optimized handovers. In this respect, FMIPv6 is integrated with the IEEE802.21 mechanism to provide seamless mobility during the overall handover process. The proposed solution is then applied in a simulated vehicular environment to optimize the NEMO handover process. It is shown through analysis and simulations of the signalling process that the overall expected handover (both L2 and L3) latency in FMIPv6 can be reduced by the proposed mechanism by 69%. Secondly, it is expected that the operator of a Next Generation Network will provide mobility as a service that will generate significant revenues. As a result, dynamic service bootstrapping and authorization mechanisms must be in place to efficiently deploy a mobility service (without static provisioning), which will allow only legitimate users to access the service. A GNU Linux based test-bed has been implemented to demonstrate this. The experiments presented show the handover performance of the secured FMIPv6 over the implemented test-bed compared to plain FMIPv6 and MIPv6 by providing quantitative measurements and results on the quality of experience perceived by the users of IPv6 multimedia applications. The results show the inclusion of the additional signalling of the proposed architecture for the purpose of authorization and bootstrapping (i.e. key distribution using HOKEY) has no adverse effect on the overall handover process. Also, using a formal security analysis tool, it is shown that the proposed mechanism is safe/secure from the induced security threats. Lastly, a novel IEEE802.21 assisted EAP based re-authentication scheme over a service authorization and bootstrapping framework is presented. AAA based authentication mechanisms like EAP incur signalling overheads due to large RTTs. As a result, overall handover latency also increases. Therefore, a fast re-authentication scheme is presented which utilizes IEEE802.21 MIH services to minimize the EAP authentication process delays and as a result reduce the overall handover latency. Analysis of the signalling process based on analytical results shows that the overall handover latency for mobility protocols will be approximately reduced by 70% by the proposed scheme.

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SANTOS, LUCIANO DA SILVA. "FAULT TOLERANCE OF MOBILITY AGENTS OF PROTOCOL MOBILE IP." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7583@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
O crescimento da Internet, tanto do ponto de vista do número de usuários como dos serviços oferecidos, e o rápido progresso da tecnologia de comunicação sem fio, tornou possível uma demanda crescente por sistemas sem fios que permitam o acesso a Internet. Porém, um dos principais fatores desafiadores para o desenvolvimento desta nova forma de acesso é a mobilidade das estações móveis. A fim de resolver todos os problemas relacionados à introdução da mobilidade nesta nova forma de acesso, a Internet Engineering Task Force (IETF) através de pesquisas definiu o Mobile IP como o protocolo padrão para esse novo cenário. Embora este protocolo receba inúmeras contribuições que visam melhorar o seu desempenho tanto nas questões de handoff e de segurança dos registros dos usuários, este protocolo não recebe a mesma atenção para a questão da falha dos seus Agentes de Mobilidade. Estes agentes suportam as conexões das estações móveis integrando as redes sem fio com as redes IP amplamente difundida. Portanto, o objetivo desta dissertação é apresentar uma proposta de tolerância à falha dos Agentes de Mobilidade a fim de contribuir nesta linha de pesquisa.
The growth of the Internet, as much of the point of view of the number of users as of the offered services, and the fast progress of the wireless communication technology, it became possible a demand for wireless systems that allow the access the Internet. However, one of the main challenging factors for the development this new access way is the mobility of the mobile stations. In order to solve all of the problems related to the introduction of the mobility in this new access form, the Internet Engineering Task Forces (IETF) through researches it defined Mobile IP as the standard protocol for that new scenery. Although this protocol receives countless contributions that seek to improve it so much acting in the handoff subjects and of safety of the users' registrations, this protocol doesn't receive the same attention for the subject of the fault of their Mobility Agents. These agents support the connections of the mobile stations integrating the wireless networks with IP netowrks spread. Therefore, the objective of this dissertation is to present a proposal of fault tolerance of the Mobility Agents in order to contribute in this research line.

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García, Hijes Raúl. "Corporate Wireless IP Telephony." Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92268.

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IP telephony is defined as the transport of telephony calls over an IP network. IP telephony exploits the integration of voice and data networks. However, enterprises are still reluctant to deploy IP telephony despite the potential increase in productivity and reduction of costs. The principal concerns are: can IP telephony provide the same level of performance in terms of security, reliability, and scalability as traditional telephony? If so, are its proclaimed benefits such as flexibility and mobility cost-effective? The aim of this thesis is to analyze how to deploy IP telephony in large corporations - while providing the necessary security and facilitating mobility. Through the different parts of this thesis, we will analyze the applicable technologies, along with their integration and management. We will focus on the essential requirements for an enterprise of scalability, reliability, flexibility, high-availability, and cost-effectiveness. The massive changes brought about due to the deregulation of telecommunications in nearly all countries, the increasingly global nature of business, and the progressively affordable and power technology underlying information and communication technologies have lead to increasing adoption of IP telephony by residential and commercial users. This thesis will examine these technologies in the context of a very large distributed corporation.
IP telefoni är definierat som transporten av telefon samtal genom ett IP nätverk. IP telefoni utnyttjar integrationen av tal och data nätverk. Dock är affärsföretag fortfarande motsträviga till att införa IP telefoni trots potentiell ökning i produktivitet och minskade kostnader. Huvud bekymren är: kan IP telefoni tillhandahålla samma nivå av prestanda med avseende på säkerhet, tillförlitlighet, och skalbarhet som traditionell telefoni? Och i så fall, är dom proklamerade fördelarna flexibilitet och rörlighet kostnadseffektiva? Målet för detta examensarbete är att analysera hur IP telefoni kan införas i stora affärsföretag - medan samtidigt tillhandahålla nödvändig säkerhet och främja rörlighet. Genom olika delar av detta examensarbete, analyserar vi tillämpliga teknologier, inklusive deras integrering och skötsel. Vi kommer att fokusera på de grundläggande kraven för ett affärsföretag gällande skalbarhet, tillförlitlighet, flexibilitet, hög tillgänglighet, och kostnadseffektivitet. Dom massiva förändringarna frambringade i och med avregleringen av telekommunikation i stort sett alla länder, affärsverksamhetens alltmer globala natur, och de progressivt kostnadseffektiva och kraftfulla underliggande teknologier bakom informations och kommunikations system har lett till ökande adoptering av IP telefoni av både privata och kommersiella användare. Detta examensarbete undersöker relevanta teknologier i samband med mycket stora utbredda affärsföretag.

Exchange student from Centro Politecnico Superior (University of Zaragoza, Spain).

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37

Xie, Jiang (Linda). "Mobility Management in Next Generation All-IP Based Wireless Systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5190.

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Next generation wireless systems have an IP-based infrastructure with the support of heterogeneous access technologies. One research challenge for next generation all-IP based wireless systems is to design intelligent mobility management techniques that take advantage of IP-based technologies to achieve global roaming between various access networks. To support global roaming, next generation wireless systems require the integration and interoperation of heterogeneous mobility management techniques. Mobility in a hierarchical structure or multilayered environment should be supported. The objective of this study is to develop new mobility management techniques for global roaming support in next generation all-IP based wireless systems. More specifically, new schemes for location management and paging in Mobile IP for network layer mobility support, and new schemes for location management and handoff management in heterogeneous overlay networks for link layer mobility support are proposed and evaluated. For network layer mobility support, a distributed and dynamic regional location management mechanism for Mobile IP is proposed. Under the proposed scheme, the signaling burden is evenly distributed and the regional network boundary is dynamically adjusted according to the up-to-date mobility and traffic load for each terminal. Next, a user independent paging scheme based on last-known location and mobility rate information for Mobile IP is proposed. The proposed scheme takes the aggregated behavior of all mobile users as the basis for paging. For link layer mobility support, an IP-based system architecture for the integration of heterogeneous mobility management techniques is proposed. Three location management schemes under this IP-based architecture are proposed. All the three schemes support user preference call delivery which is a very important feature of next generation wireless communications. A threshold-based enhancement method is also proposed to further improve the system performance. Finally, a hybrid resource allocation scheme for handoff management in wireless overlay networks is proposed. Under this scheme, the overall system resources can be optimally allocated when mobile users are covered by multiple overlay networks.

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38

Khan, Shoaib. "Towards a reliable seamless mobility support in heterogeneous IP networks." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/4065.

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Next Generation networks (3G and beyond) are evolving towards all IP based systems with the aim to provide global coverage. For Mobility in IP based networks, Mobile IPv6 is considered as a standard by both industry and research community, but this mobility protocol has some reliability issues. There are a number of elements that can interrupt the communication between Mobile Node (MN) and Corresponding Node (CN), however the scope of this research is limited to the following issues only: • Reliability of Mobility Protocol • Home Agent Management • Handovers • Path failures between MN and CN First entity that can disrupt Mobile IPv6 based communication is the Mobility Anchor point itself, i.e. Home Agent. Reliability of Home Agent is addressed first because if this mobility agent is not reliable there would be no reliability of mobile communication. Next scenario where mobile communication can get disrupted is created by MN itself and it is due to its mobility. When a MN moves around, at some point it will be out of range of its active base station and at the same time it may enter the coverage area of another base station. In such a situation, the MN should perform a handover, which is a very slow process. This handover delay is reduced by introducing a “make before break” style handover in IP network. Another situation in which the Mobile IPv6 based communication can fail is when there is a path failure between MN and CN. This situation can be addressed by utilizing multiple interfaces of MN at the same time. One such protocol which can utilize multiple interfaces is SHIM6 but it was not designed to work on mobile node. It was designed for core networks but after some modification in the protocol , it can be deployed on mobile nodes. In this thesis, these issues related to reliability of IPv6 based mobile communication have been addressed.

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Politis, Christos. "QoS provisioning and mobility management for IP-based wireless LAN." Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/796/.

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Today two major technological forces drive the telecommunication era: the wireless cellular systems and the Internet. As these forces converge, the demand for new services, increasing bandwidth and ubiquitous connectivity continuously grows. The next-generation mobile systems will be based solely or in a large extent, on the Internet Protocol (IP). This thesis begins by addressing the problems and challenges faced in a multimedia, IP-based Wireless LAN environment. The ETSI HiperLAN/2 system has been mainly selected as the test wireless network for our theoretical and simulation experiments. Apart from the simulations, measurements have been taken from real life test scenarios, where the IEEE 802.11 system was used (UniS Test-bed). Furthermore, a brief overview of the All-IP network infrastructure is presented. An extension to the conventional wireless (cellular) architecture, which takes advantage of the IP network characteristics, is considered. Some of the trends driving the 3G and WLANs developments are explored, while the provision of quality of service on the latter for real-time and non-real-time multimedia services is investigated, simulated and evaluated. Finally, an efficient and catholic Q0S framework is proposed. At the same time, the multimedia services should be offered in a seamless and uninterrupted manner to users who access the all-IP infrastructure via a WLAN, meeting the demands of both enterprise and public environments anywhere and anytime. Thus providing support for mobile communications not only in terms of terminal mobility, as is currently the case, but also for session, service and personal mobility. Furthermore, this mobility should be available over heterogeneous networks, such as WLANs, IJMTS, as well as fixed networks. Therefore, this work investigates issues such as, multilayer and multi-protocol (SIP-Mobile IP-Cellular IP) mobility management in wireless LAN and 3G domains. Several local and global mobility protocols and architectures have been tested and evaluated and a complete mobility management framework is proposed. Moreover, integration of simple yet efficient authentication, accounting and authorisation mechanisms with the multimedia service architecture is an important issue of IP-based WLANs. Without such integration providers will not have the necessary means to control their provided services and make revenue from the users. The proposed AAA architecture should support a robust AAA infrastructure providing secure, fast and seamless access granting to multimedia services. On the other hand, a user wishing a service from the All-IP WLAN infrastructure needs to be authenticated twice, once to get access to the network and the other one should be granted for the required service. Hence, we provide insights into these issues by simulating and evaluating pre-authentication techniques and other network authentication scenarios based on the wellknown IEEE 802.lx protocol for multimedia IP-based WLANs.

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Georgiades, Michael. "Context transfer support for mobility management in all-IP networks." Thesis, University of Surrey, 2008. http://epubs.surrey.ac.uk/842937/.

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This thesis is a description of the research undertaken in the course of the PhD and evolves around a context transfer protocol which aims to complement and support mobility management in next generation mobile networks. Based on the literature review, it was identified that there is more to mobility management than handover management and the successful change of routing paths. Supportive mechanisms like fast handover, candidate access router discovery and context transfer can significantly contribute towards achieving seamless handover which is especially important in the case of real time services. The work focused on context transfer motivated by the fact that it could offer great benefits to session re-establishment during the handover operation of a mobile user and preliminary testbed observations illustrated the need for achieving this. Context transfer aims to minimize the impact of certain transport, routing, security-related services on the handover performance. When a mobile node (MN) moves to a new subnet it needs to continue such services that have already been established at the previous subnet. Examples of such services include AAA profile, IPsec state, header compression, QoS policy etc. Re-establishing these services at the new subnet will require a considerable amount of time for the protocol exchanges and as a result time- sensitive real-time traffic will suffer during this time. By transferring state to the new domain candidate services will be quickly re-established. This would also contribute to the seamless operation of application streams and could reduce susceptibility to errors. Furthermore, re-initiation to and from the mobile node will be avoided hence wireless bandwidth efficiency will be conserved. In this research an extension to mobility protocols was proposed for supporting state forwarding capabilities. The idea of forwarding states was also explored for remotely reconfiguring middleboxes to avoid any interruption of a mobile users' sessions or services. Finally a context transfer module was proposed to facilitate the integration of such a mechanism in next generation architectures. The proposals were evaluated analytically, via simulations or via testbed implementation depending on the scenario investigated. The results demonstrated that the proposed solutions can minimize the impact of security services like authentication, authorization and firewalls on a mobile user's multimedia sessions and thus improving the overall handover performance.

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Dzaferagic, Samir. "Secure Session Mobility for VoIP." Thesis, KTH, Kommunikationssystem, CoS, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91676.

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High data rate wireless packet data networks have made real-time IP based services available through mobile devices. At the same time, differences in the characteristics of radio technologies (802.11/WiFi and 3G networks) make seamless handoff across heterogeneous wireless networks difficult. Despite this, many believe that the ultimate goal of next generation networks (often referred to as the fourth generation) is to allow convergence of such dissimilar heterogeneous networks. Supporting voice over Internet Protocol in next-generation wireless systems is thought by some to require support for mobility and quality of service features. Currently a mobile node can experience interruptions or even sporadic disconnections of an on going real-time session due to handovers between both networks of different types and networks of the same type. Many tests have already been done in this area and one may wonder why it is worth spending even more time investigating it? This thesis focuses on the important problem of providing session security despite handovers between networks (be they operated by the same operator or different operators and be they the same link technologies or different). One of the goals in this thesis is to investigate how an ongoing speech session can continue despite a change in transmission media1. Additionally, a number of security threats that could occur due to the handover will be identified and presented. Finally, the most suitable solution to address these threats will be tested in a real environment. Eventual shortcomings and weaknesses will be identified and presented; along with suggestions for future work. 1 When utilizing IP over carriers such as wired Ethernet, WLAN, and 3G.
Trådlösa hög-hastighets datanät har möjliggjort appliceringen av realtids tjänster på mobil utrustning över IP. Samtidigt har skillnaderna i de olika radioteknologierna (802.11/WiFi och 3G näten) introducerat nya problem med att upprätthålla trådlösa kommunikationen tvärs den heterogena trådlösa accessen. Många tror att slutmålet för nästa generations nätverk (ofta refererade som fjärde generationens nätverk) är att tillåta konvergensen av dessa olika heterogena nätverk. Stödet för Voice over Internet Protokollet (VoIP) i nästa generations trådlösa nät tror somliga kräver ett inslag av kombination mellan mobilitet samt upprätthållandet av kvaliteten. För närvarande kan den mobila noden (MN) råka ut för störningar och även sporadiska avbrott av en pågående realtidssessionen på grund av övergångar mellan samma eller olika typer av medier. Många tester har redan gjorts inom det här området och man kan fråga sig varför det är värt att lägga ner ännu mer tid på att undersöka det här? Det här examensarbetet fokuserar på det viktiga problemet som handlar om att kunna erbjuda sessions säkerhet trots övergångar mellan näten (oavsett om dessa drivs av samma eller olika operatörer samt oavsett om de är av samma eller olika nätverks typ). Ett av målen för det här examensarbetet är att undersöka hur en pågående talsession behålls vid byte av transmissionsmedia2. Vidare kommer olika säkerhetsaspekter och hot som kan tänkas uppstå vid bytet att identifieras och presenteras. Slutligen kommer den mest lämpade lösningen till problemet att testas i verklig miljö. Eventuella brister och svagheter kommer att identifieras och redovisas i slutet av rapporten tillsammans med förslag på framtida arbete. 2 Då man nyttjar IP bärare som trådbundet Ethernet, WLAN och 3G.

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Jaff, Esua Kinyuy. "IP mobile multicast over next generation satellite networks : design and evaluation of a seamless mobility framework for IP multicast communications over a multi-beam geostationary satellite network." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14581.

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The inherent broadcast nature of satellites, their global coverage and direct access to a large number of subscribers give satellites unrivalled advantages in supporting IP multicast applications. A new generation of satellite systems that support regenerative on-board processors and multiple spot beam technology have opened new possibilities of implementing IP multicast communication over satellites. These new features enable satellites to make efficient use of their allocated bandwidth resources and provide cost effective network services but equally, create new challenges for mobile satellite terminals. IP mobility support in general and IP mobile multicast support in particular on mobile satellite terminals like the ones mounted on continental flights, maritime vessels, etc., still remain big challenges that have received very little attention from the research community. Up till now, there are no proposed mechanisms to support IP multicast for mobile receivers/sources in multi-beam satellite networks in open literature. This study explores the suitability of IP multicast mobility support schemes defined for terrestrial networks in a satellite environment and proposes novel schemes based on the concepts of Home and Remote subscription-based approaches, multiple interface and PMIPv6 protocol. Detailed analysis and comparison of results obtained from the proposed schemes, Mobile IP (MIP) Home and Remote subscription-based approaches (for terrestrial networks) when implemented on a reference multi-beam satellite network are presented. From these results, the proposed schemes outperform the MIP Home and Remote subscription-based approaches in terms of gateway handover latency, number of multicast packets lost and signalling cost over the satellite air interface.

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Jaff, Esua K. "IP Mobile Multicast over Next Generation Satellite Networks. Design and Evaluation of a Seamless Mobility Framework for IP Multicast Communications over a Multi-beam Geostationary Satellite Network." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14581.

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The inherent broadcast nature of satellites, their global coverage and direct access to a large number of subscribers give satellites unrivalled advantages in supporting IP multicast applications. A new generation of satellite systems that support regenerative on-board processors and multiple spot beam technology have opened new possibilities of implementing IP multicast communication over satellites. These new features enable satellites to make efficient use of their allocated bandwidth resources and provide cost effective network services but equally, create new challenges for mobile satellite terminals. IP mobility support in general and IP mobile multicast support in particular on mobile satellite terminals like the ones mounted on continental flights, maritime vessels, etc., still remain big challenges that have received very little attention from the research community. Up till now, there are no proposed mechanisms to support IP multicast for mobile receivers/sources in multi-beam satellite networks in open literature. This study explores the suitability of IP multicast mobility support schemes defined for terrestrial networks in a satellite environment and proposes novel schemes based on the concepts of Home and Remote subscription-based approaches, multiple interface and PMIPv6 protocol. Detailed analysis and comparison of results obtained from the proposed schemes, Mobile IP (MIP) Home and Remote subscription-based approaches (for terrestrial networks) when implemented on a reference multi-beam satellite network are presented. From these results, the proposed schemes outperform the MIP Home and Remote subscription-based approaches in terms of gateway handover latency, number of multicast packets lost and signalling cost over the satellite air interface.

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Bauer, Christian [Verfasser]. "Secure and Efficient IP Mobility Support for Aeronautical Communications / Christian Bauer." Karlsruhe : KIT Scientific Publishing, 2013. http://www.ksp.kit.edu.

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Sivchenko, Dmitry. "Qos aware seamless mobility support in IP based next generation networks." Thesis, City University London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516239.

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John, Charna Tina. "Network-based IP flow mobility support in 3GPPs evolved packet core." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/9087.

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Includes bibliographical references.
Mobile data traffic in cellular networks has increased tremendously in the last few years. Due to the costs associated with licensed spectrum, Mobile Network Operators (MNOs) are battling to manage these increased traffic growths. Offloading mobile data traffic to alternative low cost access networks like Wi-Fi has been proposed as a candidate solution to enable MNOs to alleviate congestion from the cellular networks. This dissertation investigates an offloading technique called IP flow mobility within the 3rd Generation Partnership Project (3GPP) all-IP mobile core network, the Evolved Packet Core (EPC). IP flow mobility would enable offloading a subset of the mobile user‟s traffic to an alternative access network while allowing the rest of the end-user‟s traffic to be kept in the cellular access; this way, traffic with stringent quality of service requirements like Voice over Internet Protocol (VoIP) would not experience service disruption or interruption when offloaded. This technique is different from previous offloading techniques where all the end-user‟s traffic is offloaded. IP flow mobility functionality can be realised with either host- or network-based mobility protocols. The recommended IP flow mobility standard of 3GPP is based on the host-based mobility solution, Dual-Stack Mobile IPv6. However, host-based mobility solutions have drawbacks like long handover latencies and produce signaling overhead in the radio access networks, which could be less appealing to MNOs. Network-based mobility solutions, compared to the host-based mobility solutions, have reduced handover latencies with no signaling overhead occurring in the radio access network. Proxy Mobile IPv6 is a networkbased mobility protocol adapted by 3GPP for mobility in the EPC. However, the standardisation of the Proxy Mobile IPv6-based IP flow mobility functionality is still ongoing within 3GPP. A review of related literature and standardisation efforts reveals shortcomings with the Proxy Mobile IPv6 mobility protocol in supporting IP flow mobility. Proxy Mobile IPv6 does not have a mechanism that would ensure session continuity during IP flow handoffs or a mechanism enabling controlling of the forwarding path of a particular IP flow i.e., specifying the access network for the IP flow. The latter mechanism is referred to as IP flow information management and flow-based routing. These mechanisms represent the basis for enabling the IP flow mobility functionality. To address the shortcomings of Proxy Mobile IPv6, this dissertation proposes vi enhancements to the protocol procedures to enable the two mechanisms for IP flow mobility functionality. The proposed enhancements for the session continuity mechanism draw on work in related literature and the proposed enhancements for the IP flow information management and flow-based routing mechanism are based on the concepts used in the Dual- Stack Mobile IPv6 IP flow mobility functionality. Together the two mechanisms allow the end-user to issue requests on what access network a particular IP flow should be routed, and ensure that the IP flows are moved to the particular access network without session discontinuity.

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Wells, John Dowling. "A Network Mobility Survey and Comparison with a Mobile IP Multiple Home Address Extension." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/36459.

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This thesis addresses the paucity of research on network mobility with a taxonomy and a quantitative comparison on a real test bed of existing and forthcoming network mobility solutions. Broadly, network mobility solutions can be divided into two broad categories, intra-domain and inter-domain solutions. The two are distinct enough to warrant separate solutions. Network mobility solutions can also be divided into four catogories according to their implementation, (i) Mobile IP-based solutions, (ii) Mobile IP Mobile Routing, (iii) intra-domain routing protocols, and (iv) Mobile IP Foreign Agent-based solutions. This latter division by implementation serves as a useful starting point for a discussion and study of these protocols. The qualitative and quantitive comparisons presented here yield two "winning" solutions, Mobile IP with Network Address Translation (NAT) and Mobile IP Mobile Routing, both based on Mobile IP, the draft standard for Internet mobility. The two were chosen because they are the only solutions fit for production networks, not necessarily because they are the best performing solutions. Indeed, nearly all of the other solutions are promising alternatives and some, such as mobile ad hoc network (MANET) routing protocols and the solutions based on the next generation Internet (IPv6) version of Mobile IP, are particularly so. One of the solutions uses a novel extension for Mobile IP, the Multiple Home Address extension, developed and specified in this thesis, that turns a Mobile IP mobile node into a mobile router able to support dynamically sizing mobile networks while using the existing Mobile IP infrastructure.
Master of Science

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Shi, Xyiu. "Support For IP mobility and diversity in a broadband wireless access network." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/4646.

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Broadband wireless access (BWA) network working at millimetre bands possesses the advantages of quick deployment, more flexibility, wide service coverage and cost efficiency. The range of services to be provided via the system includes broadband digital television, Internet data, telephony and videoconference. Apart from broadcast digital television, all traffic is carried in Internetworking Protocol (IP) format. Unfortunately the services of such a system are susceptible to impairment by buildings, vegetation, terrain and attenuation caused by rain, snow and sleet, etc. Accordingly the service availability and system performance can drop dramatically. In the worst case, the system will experience heavy packet loss and the services might be completely unavailable. An extended multiprotocol label switching (MPLS) network architecture is proposed in this thesis, which allows fast mobile IP access and diversity routing for traffic under fade condition. This supports nomadic access, reduced packet loss and improved service availability in BWA network during system outage. Also developed herein is a Diversity and Shadow Flow Merging Mechanism, which, besides sending a packet on its normal path, also duplicates the packet and sends it on a separate, diverted labelled path. The shadow flow merging mechanism is responsible for merging the normal flow and shadow flow together and delivering the merged packet to its destination. It is anticipated that the packet can be successfully delivered to the destination even if one path fails completely during the system outage. The protocol is tested on a general BWA network that is configured with Digital Video Broadcast (DVB) downlink and Multi-Frequency Time Division Multiplex Access (MF-TDMA) uplink equipments. The protocol’s ability of reducing packet loss and improving service availability, during the period of link failure, is verified. It is concluded that the protocol is effective in improving the service availability of BWA network.

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He, Weiping. "Integrated Mobility and Service Management for Future All-IP Based Wireless Networks." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/26615.

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Mobility management addresses the issues of how to track and locate a mobile node (MN) efficiently. Service management addresses the issues of how to efficiently deliver services to MNs. This dissertation aims to design and analyze integrated mobility and service management schemes for future all-IP based wireless systems. We propose and analyze per-user regional registration schemes extending from Mobile IP Regional Registration and Hierarchical Mobile IPv6 for integrated mobility and service management with the goal to minimize the network signaling and packet delivery cost in future all-IP based wireless networks. If access routers in future all-IP based wireless networks are restricted to perform network layer functions only, we investigate the design of intelligent routers, called dynamic mobility anchor points (DMAPs), to implement per-user regional management in IP wireless networks. These DMAPs are access routers (ARs) chosen by individual MNs to act as regional routers to reduce the signaling overhead for intra-regional movements. The DMAP domain size is based on a MN's mobility and service characteristics. A MN optimally determines when and where to launch a DMAP to minimize the network cost in serving the user's mobility and service management operations. We show that there exists an optimal DMAP domain size for each individual MN. We also demonstrate that the DMAP design can easily support failure recovery because of the flexibility of allowing a MN to choose any AR to be the DMAP for mobility and service management. If access routers are powerful and flexible in future all-IP based networks to perform network-layer and application-layer functions, we propose the use of per-user proxies that can run on access routers. The user proxies can carry service context information such as cached data items and Web processing objects, and perform context-aware functions such as content adaptation for services engaged by the MN to help application executions. We investigate a proxy-based integrated mobility and service management architecture (IMSA) under which a client-side proxy is created on a per-user basis to serve as a gateway between a MN and all services engaged by the MN. Leveraging Mobile IP with route optimization, the proxy runs on an access router and cooperates with the home agent and foreign agent of the MN to maintain the location information of the MN to facilitate data delivery by services engaged by the MN. Further, the proxy optimally determines when to move with the MN so as to minimize the network cost associated with the user's mobility and service management operations. Finally we investigate a proxy-based integrated cache consistency and mobility management scheme called PICMM to support client-server query-based mobile applications, to improve query performance, the MN stores frequently used data in its cache. The MN's proxy receives invalidation reports or updated data objects from application servers, i.e., corresponding nodes (Cans) for cached data objects stored in the MN. If the MN is connected, the proxy will forward invalidation reports or fresh data objects to the MN. If the MN is disconnected, the proxy will store the invalidation reports or fresh data objects, and, once the MN is reconnected, the proxy will forward the latest cache invalidation report or data objects to the MN. We show that there is an optimal ``service area'' under which the overall cost due to query processing, cache consistency management and mobility management is minimized. To further reduce network traffic, we develop a threshold-based hybrid cache consistency management policy such that whenever a data object is updated at the server, the server sends an invalidation report to the MN through the proxy to invalidate the cached data object only if the size of the data object exceeds the given threshold. Otherwise, the server sends a fresh copy of the data object through the proxy to the MN. We identify the best ``threshold'' value that would minimize the overall network cost. We develop mathematical models to analyze performance characteristics of DMAP, IMSA and PICMM developed in the dissertation research and demonstrate that they outperform existing schemes that do not consider integrated mobility and service management or that use static regional routers to serve all MNs in the system. The analytical results obtained are validated through extensive simulation. We conclude that integrated mobility and service management can greatly reduce the overall network cost for mobile multimedia and database applications, especially when the application's data service rate is high compared with the MN's mobility rate.
Ph. D.

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QUENTAL, Nivia Cruz. "CPMIPV6: uma abordagem intradomínio e interdomínio para redes IP móveis." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/21127.

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A continuidade de sessões de comunicação entre sistemas finais, denominados nós, sobre redes móveis heterogêneas mediante handover tem sido objeto de estudo de pesquisas recentes. A ampla difusão de aplicativos multimídia para dispositivos móveis, permitindo a interação entre usuários que se deslocam em uma rede móvel, tornam esse problema ainda mais relevante e atual. No âmbito da mobilidade IP, alguns dos principais desafios envolvem aliar interoperabilidade entre tecnologias de acesso e baixa latência de handover, além de permitir a transição entre redes de domínios diferentes de forma transparente. O protocolo Proxy MIP versão 6 (PMIPv6) torna locais as operações de gerenciamento de mobilidade de modo a reduzir o overhead de comunicação em relação ao Mobile IP (MIP). Entretanto, o consequente isolamento da gerência de mobilidade ao domínio local impede que a transição entre diferentes domínios ocorra de forma transparente ao usuário. A presente tese apresenta o Clustered PMIPv6 (CPMIPv6) como uma abordagem intradomínio e interdomínio de baixo custo e latência para a camada de rede baseada no Protocolo PMIPv6. Essa abordagem consiste em utilizar gerenciamento de mobilidade distribuído como forma de compartilhar e antecipar informações de nós móveis à entidadeâncora de cada domínio. Para tal, um cluster é formado por essas entidades-âncora e a comunicação entre elas ocorre por meio de um protocolo P2P. Esse gerenciamento torna a obtenção de informações dos nós móveis simplificada em handovers interdomínios futuros. O caráter distribuído do CPMIPv6 associado ao mínimo de acréscimo de mensagens de sinalização além daquelas existentes no PMIPv6 permite manter a infraestrutura da rede original, sem introduzir entidades centralizadoras. Comparações entre soluções do Estado da Arte e o CPMIPv6 são realizadas por meio de modelagem e simulação. Com auxílio do simulador NS-3, um subconjunto dessas soluções são avaliadas em um cenário básico com baixo número de usuários e de redes disponíveis. Os resultados de experimentos utilizando modelagem executados em cenários com alta densidade de nós indicam que o CPMIPv6 obteve custo de sinalização ao menos 12% menor, latência no mínimo 16% inferior e perda de pacotes ao menos 16% menor. Ademais, o CPMIPv6 obtém goodput superior às demais abordagens. Ambos experimentos confirmam o CPMIPv6 como a abordagem intradomínio e interdomínio com melhor desempenho nos cenários avaliados. O CPMIPv6 é um importante salto na evolução dos sistemas de comunicações móveis extrapolando as fronteiras das tecnologias de enlace e limites de domínio sem perder as vantagens da comunicação no âmbito local.
Communication sessions continuity among wireless devices during handover in heterogeneous networks have been studied in recent research. The evolution and widespread multimedia applications for mobile gadgets make that problem even more relevant. Some of the main challenges in IP mobility include associating access technologies interoperability, low handover latency, and seamless handover among different domains. Proxy MIP version 6 (PMIPv6) protocol aims at reducing signaling overhead in comparison to Mobile IP (MIP) making local the management operations. However, that local management prevents the possibility of seamless interdomain handover. This thesis presents Clustered PMIPv6 (CPMIPv6) as a low-cost and low-latency approach for intradomain and interdomain handover in the network layer based on PMIPv6. That approach consists in using distributed mobility management as a mean to share and anticipate mobile nodes information to anchor entities in each domain. In order to achieve this, domain entities from each domain forms a cluster and uses a P2P protocol for communication. That management simplifies mobile nodes information gathering used in future interdomain handovers. CPMIPv6 distributed feature associated to a minimum set of additional signaling messages to PMIPv6 allows to maintain the original networks infrastructure without introducing centralized entities. Comparisons among state of the art approaches and CPMIPv6 are made by means of analytical modeling and simulation. Simulations were run with the NS- 3 network simulator with a subset of the approaches in a small scenario with low number of nodes and available networks. Modeling results in scenarios with high node densities have shown that CPMIPv6 reduced cost in at least 12%, reduced latency at least in 16%, and caused at least 16% reduction on packet loss. CPMIPv6 additionally obtained better goodput values. Both experiments confirmed CPMIPv6 as the best interdomain approach in the selected scenarios. Thus, CPMIPv6 is an important leap to the mobile communication systems evolution going beyond link-layer technologies and domain frontiers without losing the advantages of local signaling.

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Dissertations / Theses on the topic 'Mobilité IP'

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