Dissertations / Theses on the topic 'Mobile IPv6'
To see the other types of publications on this topic, follow the link: Mobile IPv6.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Mobile IPv6.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Darwich, Jamal. "Comparative study of Mobile IPv4 and Mobile IPv6." Thesis, Högskolan Väst, Institutionen för ekonomi och it, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-3437.
Full textAbstract:
This thesis has compared the Mobile IPv4 and Mobile IPv6 to find out which of them performs better when it comes to send datagram from the correspondent node to the mobile node. The tests that were made to measure performance were latency, TCP/UDP throughput, loss and delay, as well as time measurement for connectivity loss for the mobile node while roaming. The tests were done using Cisco equipments and Microsoft Windows 7 Professional OS. Due to the hardware and software used, the route of datagram was the same in both scenarios since Cisco routers and Microsoft Windows 7 OS does not support route optimization for Mobile IPv6. The results showed that Mobile IPv4 performed better in all the tests done.
2
Kintu, Zephernia. "Migrating to IPv6." Thesis, KTH, Kommunikationssystem, CoS, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96355.
Full textAbstract:
Today hundreds of millions of users are interconnected by communication channels allowing them to communicate and to share information. These users and the devices that interconnect them are what constitute the Internet. The Internet is a network of networks with a myriad of computer devices, including smartphones, game consoles (handheld/stationary), IP televisions, tablet computers, laptop computers, desktop computers, palmtop computers, etc. This network of computers flourishes because of careful planning and maintenance by Internet Service Providers (ISPs), backbone network operators, and others. An additional factor that enables the Internet to operate is the four logical layers of abstraction in the TCP/IP protocol stack. One of these layers is the layer responsible for the transfer of datagrams/packets from one host to another. This layer is known as the Internet Protocol (IP) layer. However, as originally conceived a 32 bit address was thought to be more than enough. The space of IP addresses was distributed among different regions rather disproportionately, driven largely by the numbers of addresses that were requested (ordered in time). Today after a series of inventions in the field (such as the world wide web) and a rapid growth in the number of devices that wish to connect to the Internet the available unassigned address space has largely been depleted. Regions with large populations, but with few assigned blocks of IP addresses have begun to exhaust all their assigned addresses, while other regions face the same fate in a few months. The need for a larger address space was predicted years ago and the next generation addressing scheme was devised as part of the development of Internet Protocol Version 6 (IPv6). Countries such as China and India had few IPv4 addresses and they have been forced to transition to IPv6 rather quickly. Today a significant number of the users in these countries are unable to communicate over IPv4 networks. The purpose of this thesis project is to discuss the transition to IPv6 and the transition to this new addressing scheme. IPv6 provides a much larger address space, along with a number of additional improvements in comparison to the previous version of IP (i.e., IPv4). Despite the advantages of adopting IPv6, the incentive to transition is low amongst well established businesses, especially those in regions that received a considerable number of IPv4 addresses initially. Instead different techniques have been employed in these places to mitigate the problem of IPv4 address exhaustion. It is also probable that this reluctance is a way to keep competing businesses out of the market for a while longer. This thesis aims to facilitate the transition from IPv4 to IPv6.Miljontals användare är idag sammankopplade genom kommunikationskanaler som tillåter utbyte av information. Datornätet Internet utgörs av dessa användare och de enheter som sammanbinder dem. Internet är ett nätverk av nätverk med en myriad av olika datorutrustning såsom; spelkonsoler, smartphones, bärbara datorer, stationära datorer, handdatorer, även IPTV, kylskåp, tvättmaskiner, osv. Detta nätverk blomstrar på grund av noggrann planering och underhåll av internetleverantörer, nätoperatörer och andra. En ytterligare faktor som gör det möjligt för Internet att fungera är de fyra logiska skikt av abstaktion i TCP/IP-protokollstacken, en standard för datakommunikation. Ett av dessa skikt ansvarar för överföring av datapaket från en ändpunkt till en annan. Detta skikt är kallad Internet Protocol(IP) layer. Ursprungligen ansågs en 32-bitars adress vara mer än tillräcklig. Dessa IP-adresser delades ut till olika regioner rätt så oproportionerligt till stor del beroende på antalet adresser en region begärt. Idag efter en rad uppfinningar inom området(såsom webben/world wide web) och en snabb tillväxt i antal enheter som önskar ansluta sig till Internet är det tillgängliga adressutrymmet i stort sett slut. Regioner med stor befolkning men med få tilldelade block av IP-addresser har börjat göra slut på sina tilldelade adresser medan andra regioner står inför samma öde inom några månader. Behovet av ett större adressrymd sågs flera år sedan och nästa generations addresseringsschema utformades som en del av utveckligen, Internet Protocol version 6(IPv6). Länder som Kina och Indien hade ett fåtal IPv4-adresser och de har varit tvungna att övergå till IPv6 ganska snabbt. Idag kan inte ett stort antal användare i dessa länder kommunicera över IPv4-nätverk. Syftet med detta examensarbete är att diskutera övergången till IPv6 samt övergången till detta nya adresseringsschema. IPv6 ger en mycket större adressrymd samt en rad ytterligare förbättringar i jämförelse med den tidigare versionen av IP(dvs IPv4). Trots fördelarna med att övergå till IPv6 är viljan låg bland väletablerade företag, särskilt i regioner som mottagit ett stort antal IPv4-adresser från början. Dessa regioner tillämpar istället olika tekniker för att bromsa utmattningen av IPv4-adresser. Det är också troligt att denna motvija är ett sätt att hålla konkurrerande företag från marknaden ett tag till. Detta examensarbete syftar till att underlätta övergången från IPv4 till IPv6.
3
Gungor, Vehbi Cagri. "Handover Algorithms For Mobile Ipv6." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1209329/index.pdf.
Full textAbstract:
With recent technological advances in wireless communication networks, the need for an efficient architecture for IP mobility is becoming more apparent. Enabling IP mobility architecture is a significant issue for making use of various portable devices appearing on the Internet. Mobile IP, the current standard for IP based mobility management, is capable of providing wireless Internet access to mobile users. The most important feature of Mobile IP is its ability to support the
changing point of attachment of the mobile user by an algorithm known as handover. A handover algorithm is needed to maintain connectivity to the Internet whenever the mobile users move from one subnet to another, while simultaneously
providing minimum disruption to ongoing sessions. This thesis gives an overview of Mobile IP, its open issues, some of the subsequent enhancements and extensions related to the handover management problem of the mobile user. Description and evaluation of various handover algorithms for Mobile IP which have been proposed to reduce packet loss and delay during handover constitute the core of the thesis. In this thesis, a comparative performance evaluation of the proposed protocols and the combination of them is also presented through simulations.
4
Valadon, Guillaume. "Mobile IPv6 : architectures et protocoles." Paris 6, 2008. http://www.theses.fr/2008PA066257.
Full textAbstract:
Cette thèse vise à améliorer les performances de Mobile IPv6 en contrôlant les limitations induites par l'utilisation du routeur gérant la mobilité: le home agent. Nous proposons deux approches compatibles avec l'infrastructure actuelle de l'Internet permettant de gérer la mobilité de façon transparente pour le réseau et les périphériques fixes. Tout d'abord, nous décrivons une nouvelle architecture de gestion de la mobilité appelée Home Agent Migration qui permet d'utiliser plusieurs home agents. Lors d'un déploiement, nous montrons qu'il est possible d'obtenir des performances comparables à celles de communications sans Mobile IPv6. Ensuite, nous définissons les propriétés des emplacements des home agents en terme de théorie des graphes. Nous quantifions alors l'impact du protocole Mobile IPv6 sur les communications. Enfin, nous proposons un nouvel algorithme permettant de traiter les déploiements de Mobile IPv6 et de Home Agent Migration dans des graphes modélisant des réseaux.
5
Klügl, Richard. "Analýza handoveru v Mobile IPv6." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218562.
Full textAbstract:
This master’s thesis is focused on IP mobility support for mobile users and their devices in IPv6-based wireless networks. Then the Mobile IPv6 (MIPv6) protocol was proposed for this purpose and that is also the main objective of the thesis. This consists of several basic sections and is organized as follows: The first one deals with the overview of the function of Mobile IP, which enables the mobility of nodes around the Internet, without a change of their original IP address. Moreover there are introduced the primary differences between MIPv6 and its previous version – i.e., MIPv4, proposed for IPv4-based environment. The second chapter of the master’s thesis thereafter describes detailed information about all the most important mechanisms and features of Mobile IPv6 and this way tries to explain principles of its functioning. Further the thesis analyses some of proposed MIPv6 extensions – i.e., Hierarchical Mobile IPv6 (HMIPv6), Mobile IPv6 Fast Handover (FMIPv6) a Fast Handover for HMIPv6 (F-HMIPv6) protocols, and mainly aim at signaling process during the handover of a mobile node. In the last main section of the master’s thesis an analytical method to evaluate the performance of IPv6-based mobility management protocols was proposed. Subsequently, this method is applied on the protocols which were mentioned above and are studied the effects of various network parameters on the performance of these protocols.
6
Žáček, Martin. "Mobile IPv6 v prostředí OPNET Modeler." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218278.
Full textAbstract:
Master’s thesis includes knowledges about mobility support in IPv4 networks and studies abilities for mobility support in IPv6 networks. Describes protocols for mobility support, their functions and topologies like MIPv6 (RFC 3775), FMIPv6 (RFC 5568), HMIPv6 (RFC 5380) and F-HMIPv6. The thesis contains a design of the simulation MIPv6 in the OPNET Modeler program and the measured results are explained. There are analysis of source code for mobility support in MIPv6 too, which were used for design a new protocol according to FMIPv6 in the OPNET. The following parts of the proposal have been successfully resolved. The link-layer events detection, which triggers FMIPv6 protocol and implementation of two new types of messages, RtSolPr and PrRtAdv. Knowledges from this thesis could be used for next development of FMIPv6 in the OPNET. But could be used for generaly development new protocols working at network-layer too.
7
Abad, Camarero Daniel. "Performance analysis of IPv4 / IPv6 protocols over the third generation mobile network." Thesis, KTH, Kommunikationsnät, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158986.
Full textAbstract:
Currently, the IPv4 protocol is heavily used by institutions, companies and individuals, but every day there is a higher number of devices connected to the network such as home appliances, mobile phones or tablets. Each machine or device needs to have its own IP address to communicate with other machines connected to Internet. This implies the need for multiple IP addresses for a single user and the current protocol begins to show some deficiencies due to IPv4 address space exhaustion. Therefore, for several years experts have been working on an IP protocol update: the IPv6 128-bit version can address up to about 340 quadrillion system devices concurrently. With IPv6, today, every person on the planet could have millions of devices simultaneously connected to the Internet. The choice of the IP protocol version affects the performance of the UMTS mobile network and the browsers as well. The aim of the project is to measure how the IPv6 protocol performs compared to the previous IPv4 protocol. It is expected that the IPv6 protocol generates a smaller amount of signalling and less time is required to fully load a web page. We have analysed some KPIs (IP data, signalling, web load time and battery) in lab environment using Smartphones, to observe the behaviour of both, the network and the device. The main conclusion of the thesis is that IPv6 really behaves as expected and generates savings in signalling, although the IP data generated is larger due to the size of the headers. However, there is still much work as only the most important webpages and the applications with a high level of market penetration operate well over the IPv6 protocol.Cada día existe un mayor número de dispositivos conectados a la red, tales como electrodomésticos, teléfonos móviles inteligentes o tabletas, por lo que la red debe evolucionar constantemente y ser capaz de proveer servicio a todos los usuarios. Cada equipo necesita tener su propia dirección IP para comunicarse con otras máquinas conectadas a Internet, por lo que es necesario tener un gran número de direcciones IP y la versión del protocolo actual comienza a mostrar algunas deficiencias (debido fundamentalmente al agotamiento del espacio de direccionamiento IPv4 y algunas funciones de seguridad que han quedado obsoletas). Desde hace varios años, los expertos están trabajando en una actualización del protocolo IP: la versión seis (llamada IPv6) que utiliza 128 bits para el direccionamiento pudiendo administrar simultáneamente hasta unos 340 trillones de dispositivos al mismo tiempo. La elección de la versión del protocolo IP afecta al comportamiento de la red móvil, ya que los expertos todavía están optimizando y realizando cambios en la arquitectura de red y en los dispositivos para soportar el protocolo IPv6. El objetivo del proyecto consiste en comparar y evaluar las diferentes versiones del protocolo IP utilizado, en gran medida, para acceder a la red de internet. La principal conclusión del proyecto es que IPv6 realmente se comporta como se espera y genera ahorros en la señalización, aunque los datos IP generados son mayores. Sin embargo, aún queda mucho trabajo por hacer, ya que sólo las páginas más importantes y las aplicaciones más utilizadas por los usuarios funcionan bien sobre el protocolo IPv6.
8
Manepalli, Sarika. "Enhanced handoff algorithm for the co-existence of mobile IPV4 and IPV6 networks." Thesis, Wichita State University, 2009. http://hdl.handle.net/10057/2423.
Full textAbstract:
As wireless technology has improved, the demand for constant internet connectivity
increased. With the invention of Mobile IP, users are still more interested to have connection to
the internet while moving from one network to another. During the mobility, the mobile host
moves from one network to another, undergoes the handoff process, and registers with the new
network. Due to the scarcity of IPv4 addresses and other limitations, new Internet Protocol
version 6 (IPv6) has evolved. In the real world, planning is being done to deploy IPv6 along with
the IPv4 network. The IPv6 node should understand IPv4 addressing and its features while
communicating with it. When considering mobility in both IPv4 and IPv6 networks together, it is
a bit complicated where either the mobile host or any other entity in the network should
understand both IPv4 and IPv6 networks.
In this thesis, research was centralized in the scenario where both internet protocol
versions IPv4 and IPv6 are active and mobility is introduced between them. The research deals
with the handoff process and registration of the mobile node with the agent in the new network.
The author proposed a new handoff algorithm with the basic security involved in the process
which can be used as model before planning to introduce mobility between IPv4 and IPv6
protocols. The significance of the algorithm is to reduce the handoff latency by enhancing the
functionality of the Tunnel End Point (TEP); this in turn reduces the tunneling of the data twice.
The research, analysis is done on the complete handoff process by varying different
parameters involved in the process. An analytical model is proposed to support the algorithm.
The effects of the parameters are studied. The results of the proposed analytical model were
studied in comparison with the traditional schemes.Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical and Computer Engineering
9
Nunes, Fábio Pessoa. "Arquitetura de mobilidade IPv6 entre cidades digitais = Mobile IPv6 architecture between digital cities." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259452.
Full textAbstract:
Orientador: Leonardo de Souza MendesDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T21:10:42Z (GMT). No. of bitstreams: 1 Nunes_FabioPessoa_M.pdf: 6956532 bytes, checksum: 55194ac0a721f75279923f8424903edc (MD5) Previous issue date: 2012
Resumo: O resumo poderá ser visualizado no texto completo da tese digital
Abstract: The abstract is available with the full electronic document
Mestrado
Telecomunicações e Telemática
Mestre em Engenharia Elétrica
10
Jiang, Sheng. "Make Grid systems IPv6-enabled and provide mobility support in Grid systems based on mobile IPv6." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444796/.
Full textAbstract:
During the last few years, systems have emerged to perform large-scale computation and data storage over IP-enabled data communication networks using Grid middleware technology. Grid middleware integrates the computational resources, which may be distributed geographically, over networks. These Grid implementations are currently supported only over IPv4. The next generation Internet Protocol - IPv6 - is replacing IPv4 with a number of improvements. Since IPv6 is expected to become the core protocol for next generation networks, Grid computing systems should be able to continue to work as the lower-layer network protocols migrate to IPv6. Therefore, we studied in depth what needed to be done to integrate IPv6 functionality into Grid middleware here we include both Grid middleware itself and its interface to the underlying networking environment. We have also given consideration to how a Grid implementation can be made to work in heterogeneous IPv4/IPv6 networks. We have used the Globus Toolkit as our working example of a Grid implementation. However, the mechanisms and approaches for integrating IPv6 into the Globus Toolkit are generic. It should cover the integration of IPv6 into most other Grid implementations and even to other IP-based applications. Another aspect of my work relates to the provision of mobility support for Grid middleware, since a lot of Grid resources and users have to be mobile in the wide-area distributed computing environment. Amongst the many mobility solutions, Mobile IP we find the most suitable it has two main advantages in its provision of mobility support in the lower-layer network infrastructure. Firstly, it separates the mobility operations from upper-layer applications, here the Grid middleware. No resultant changes are required in either the applications or the Grid implementations. Secondly, Grid hosts can maintain the identities, so that they can work continuously. The use of Mobile IPv6 rather than Mobile IPv4 is more efficient. This shows that our effort in making Grid middleware IPv6-enabled has brought advantages into the Grid computations. The success of running Grid middleware over Mobile IPv6 builds up only the lower infrastructure for the mobile-enabled Grid by solving the transparent access and handover issues in mobility scenarios. The Grid needs to be modified and improved further in order to work effectively in the mobile environment. The study indicated the major Grid-relevant issue in mobility scenarios is that the status of the Grid changes frequently. Therefore, we introduce a dynamic Grid resource discovery mechanism. Then, we categorise these important characters into four aspects. They are monitored and parameterised dynamically allowing Grid middleware to assign Grid resources dynamically. Eventually, we provide Grid resource mobility functions. Finally, while we have concentrated on the Grid environment, most of methodology and the generic approach apply equally well to other environments.
11
Bansal, Saurabh. "Framework to facilitate smooth handovers between mobile IPv6 networks." Thesis, Middlesex University, 2006. http://eprints.mdx.ac.uk/9769/.
Full textAbstract:
Fourth generation (4G) mobile communication networks are characterised by heterogeneous access networks and IP based transport technologies. Different access technologies give users choices to select services such as levels of Quality of Service (QoS) support, business models and service providers. Flexibility of heterogeneous access is compounded by the overhead of scanning to discover accessible services, which added to the handoff latency. This thesis has developed mechanisms for service discovery and service selection, along with a novel proposal for mobility management architectures that reduced handoff latency. The service discovery framework included a service advertisement data repository and a single frequency band access mechanism, which enabled users to explore services offered by various operators with a reduced scanning overhead. The novel hierarchical layout of the repository enabled it to categorise information into various layers and facilitate location based information retrieval. The information made available by the repository included cost, bandwidth, Packet Loss (PL), latency, jitter, Bit Error Rate (BER), location and service connectivity information. The single frequency band access mechanism further enabled users to explore service advertisements in the absence of their main service providers. The single frequency access mechanism broadcasted service advertisements information piggybacked onto a router advertisement packet on a reserved frequency band for advertisements. Results indicated that scanning 13 channels on 802.11 b interface takes 189ms whereas executing a query with maximum permissible search parameters on the service advertisement data repository takes 67ms. A service selection algorithm was developed to make handoff decisions utilising the service advertisements acquired from the service discovery framework; based on a user's preference. The selection algorithm reduced the calculation overhead by eliminating unsuitable networks; based on interface compatibility, service provider location, unacceptable QoS (Quality of service) and unacceptable cost; from the selection process. The selection algorithm utilised cost, bandwidth, PL, latency, jitter, BER and terminal power for computing the most suitable network. Results indicated that the elimination based approach has improved the performance of the algorithm by 35% over non- elimination oriented selection procedures, even after utilising more selection parameters. The service discovery framework and the service selection algorithm are flexible enough to be employed in most mobility management architectures. The thesis recommends Seamless Mobile Internet Protocol (SMIP) as a mobility management scheme based on the simulation results. The SMIP protocol, a combination of Hierarchical Mobile Internet Protocol (HMIP) and Fast Mobile Internet Protocol (FMIP), suffered hand off latency increases when undergoing a global handoff due to HMIP. The proposed modification to the HMIP included the introduction of a coverage area overlap, to reduce the global handoff latency. The introduction of a Home Address (HA) in Wireless Local Area Networks (WLAN) binding table enabled seamless handoffs from WLANs by having a redirection mechanism for the user's packets after handoff. The thesis delivered a new mobility management architecture with mechanisms for service discovery and service selection. The proposed framework enabled user oriented, application centric and terminal based approach for selecting IPv6 networks.
12
Mathews, Mudhush Koruth. "Performance of video streaming in a Mobile IPv6 environment." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5168.
Full textAbstract:
Includes bibliographical references (leaves 77-81).A seamless video streaming handover scheme is formulated in this research to guarantee the continuity of a Video on Demand application in the context of IP mobility. The scheme is analysed and an evaluation framework is developed to assess its feasibility. This thesis presents an effective method of supporting real-time multimedia applications on IP-centric wireless networks using Mobile IPv6. From the results, the scheme shows a significant improvement in terms of the disruption time and packet loss that a Video on Demand application experiences during handover. The effects of Mobile IPv6 are mitigated by the use of the adaptive mobile video streaming scheme. Thus, it is feasible to use a combination of adaptation of video quality based on network conditions and Fast Mobile IPv6 to guarantee application continuity in the context of IP mobility.
13
Elshakankiry, Osama. "Securing home and correspondent registrations in mobile IPv6 networks." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/securing-home-and-correspondent-registrations-in-mobile-ipv6-networks(8cd1f092-9229-421d-8315-9220bb8f19f4).html.
Full textAbstract:
The Mobile IPv6 (MIPv6) protocol enables mobile nodes (MNs) to remain connected to other correspondent nodes (CNs) while roaming the IPv6 Internet. Home and correspondent registrations are essential parts of the MIPv6 protocol, whereby MNs register their care-of addresses (CoAs) with their home agents (HAs) and with their CNs, respectively. Security provision for home and correspondent registrations is a fundamental part of the MIPv6 protocol and has been an open research issue since the early stages of the protocol.This thesis examines state-of-the-art protocols for securing home and correspondent registrations in MIPv6 networks. The strengths and weaknesses of these protocols are discussed. The investigation of these protocols leads to the proposal of an enhanced home registration protocol and a family of correspondent registration protocols. The Enhanced Home Registration (EHR) protocol extends the basic home registration protocol defined in MIPv6 to support the location authentication of MNs to their HAs. The EHR is based on novel ideas of segmenting the IPv6 address space, using a symmetric CGA-based technique for generating CoAs, and applying concurrent CoAs reachability tests. As a result, EHR is able to reduce the likelihood of a malicious MN being successful in luring an HA to flood a third party with useless packets using MIPv6. In addition, EHR enables HAs to help in correspondent registrations by confirming MNs' CoAs to CNs. Simulation studies of EHR have shown that it only introduces a marginal increase in the registration delay, but a significant increase in the signalling overhead as a cost of supporting the location authentication of MNs.The thesis also proposes a family of correspondent registration protocols. These protocols rely on the assistance of home networks to confirm the MNs' ownership of the claimed HoAs and CoAs. The protocols consist of three phases: a creation phase, an update phase and a deletion phase. Informal and formal protocol analyses have confirmed the protocols' correctness and satisfaction of the required security properties. The protocols have been simulated extensively and the results show that they produce lower registration delay and a reduction in the signalling overhead during update and deletion phases. This is at the cost of a varying increase, depending on the protocol variant, in the registration delay and signalling overhead during the creation phase.
14
Ernst, Thierry. "Le support des réseaux mobiles dans IPv6." Phd thesis, Grenoble 1, 2001. http://tel.archives-ouvertes.fr/tel-00406508.
Full textAbstract:
Cette thèse est dédiée à l'étude du support des réseaux mobiles dans IPv6, la nouvelle génération du protocole qui régit les communications dans l'Internet. Les travaux traditionnels dans ce domaine se préoccupent de fournir une connectivité permanente pour les stations mobiles. En revanche, l'objet de la présente étude est de traiter séparément le cas d'un réseau tout entier qui migre dans la topologie Interne, ce qui pose un certain nombre de nouveaux problèmes. Nous étudions tout d'abord l'Etat de l'Art dans le domaine traditionnel du support de la mobilité des stations mobiles. cette étude nous permet de définir une taxonomie des propositions. En second lieu, nous définissons une nouvelle terminologie dédiée au support des réseaux mobiles, ainsi que leurs caractéristiques et les problèmes spécifiques causé par leur mobilité. Parmi un ensemble d'approches envisagées, nous nous consacrons tout particulièrement à l'usage de Mobile IPv6, le standard de l'IETF pour le support des stations mobiles. Dans un premier temps, nous proposons un certain nombre d'extensions nécessaires à ce protocole. Pour le long terme, nous proposons de réduire le coût des messages de contrôle induit par ce protocole au moyen de deux techniques multipoint. La première, dite traditionnelle, établit un arbre de distribution entre le réseau mobile et ses correspondants. La deuxième enregistre directement la liste des correspondants dans le message de contrôle. La performance de ces extensions multipoint est évaluée par simulation, et nous concluons cette dissertation par une vue d'ensemble d'une nouvelle architecture de gestion de la mobilité rassemblant diverses techniques, dont nos extensions multipoint.
15
Faizan, Jahanzeb. "Introducing reliability and load balancing in Mobile IPv6 based networks." Ann Arbor, Mich. : ProQuest, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3203791.
Full textAbstract:
Thesis (Ph.D. in Computer Science)--S.M.U.Title from PDF title page (viewed July 5, 2007). Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6721. Adviser: Hesham El-Rewini. Includes bibliographical references.
16
Wei, Guozhi. "Optimisation du Handover dans le protocole IPv6 mobile avec la méthode E-HCF." Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00462081.
Full textAbstract:
Les réseaux sans fil sont en plein développement du fait de la flexibilité de leur interface, qui permet aux utilisateurs de se communiquer directement entre eux ou de se connecter facilement à Internet en onde radio sans mettre en place préalablement d'infrastructures lourdes, telles que des câbles filaires. Parmi les différentes technologies de réseaux sans fil, l'IEEE 802.11/Wi-Fi est devenu une technologie plus connue et plus utilisée pour construire des réseaux sans fil à haut débit dans une zone à forte concentration d'utilisateurs, telle que les aéroports, les campus ou les sites industriels. L'engouement pour les réseaux sans fil et notamment pour les réseaux Wi-Fi a fait émerger de nouvelles nécessités, tel que se déplace dans les réseaux sans fil tout en restant connecté à Internet. Dans les réseaux sans fil, le déplacement d'un utilisateur implique parfois un changement de Point d'accès (AP) au réseau. On désigne généralement ce fait un handover de niveau 2, du fait que le changement d'AP n'implique que les deux premières couches du modèle OSI. Si les deux APs se situent dans des réseaux différents, le changement d'AP implique aussi le changement de réseau pour cet utilisateur. On dénomme généralement cette situation un handover de niveau 3, par le fait que cet utilisateur devrait changer son réseau d'attachement et son adresse IP pour maintenir la connexion à Internet et que ce changement intervient sur la couche réseau du model OSI. La procédure du handover de niveau 2 dans les réseaux Wi-Fi est gérée par la norme IEEE 802.11 et celle de niveau 3 est gérée par le protocole IP Mobile. Le protocole IP Mobile est un protocole standardisé par l'IETF qui permet à l'utilisateur de maintenir ses communications en cours et de rester connecté à Internet tout en masquant d'une manière transparente le changement de réseau. Ainsi, l'utilisateur peut se déplace dans les réseaux Wi-Fi tout en maintenant les communications en cours et restant connecté à Internet grâce à la norme IEEE 802.11 et au protocole IP Mobile. Cependant, le délai introduit par ces deux procédures du handover est trop long, les communications en cours sont interrompus pendant ces procédures, naturellement, cela ne peut pas répondre aux exigences qualitatives des applications temps réel comme la vidéo conférence ou la voix sur IP. Diverses propositions qui ont été faites pour réduire le délai de ces procédures du handover et améliorer leur performance. Cependant, ces propositions sont soit imparfaites, soit non-implémentables à cause de leur complexité. En partant du principe que les réseaux Wi-Fi et les routeurs d'accès sont déjà massivement implantés dans le monde universitaire et dans les entreprises, nous proposons d'ajouter une nouvelle fonctionnalité, appelé E-HCF (Extended Handover Control Function) dans un routeur sans modifier les autres équipements du réseau. Le routeur pourvu de cette fonctionnalité est dénommé le routeur E-HCF. Pour réduire le délai des procédures du handover, la fonctionnalité E-HCF permet au routeur de générer une topologie des APs en utilisant la théorie des graphes de voisinage et de maintenir un pool d'adresses IP disponibles dans sa base de données. Quand le Nœud mobile (MN) a besoin de changer son AP, le routeur E-HCF peut proposer au MN une liste des APs potentiellement utilisables qui sont choisis et classés par un algorithme de sélection et de classement que nous avons élaboré dans la thèse. Si le changement d'AP implique un changement de réseau, le MN doit changer d'adresse IP. Dans ce cas, le routeur E-HCF peut attribuer une adresse IP unique à ce MN. Le MN peut donc utiliser cette adresse sans exécuter la phase d'Auto-configuration d'adresses ni exécuter la procédure de Détection d'adresse dupliquée. Avec cette nouvelle fonctionnalité E-HCF, nous pouvons réduire le délai des procédures du handover de quelques secondes à une centaine de millisecondes. Pour réduire la perte de paquets due aux procédures du handover, nous proposons de modifier le protocole IPv6 Mobile. Le MN met fin à l'association entre son adresse mère et son adresse temporaire avec l'Agent mère (HA) et le Nœud correspondant (CN) avant de procéder la procédure du handover. Par ce moyen, le HA peut intercepter les paquets destinés à l'adresse mère du MN et les garder dans son mémoire tampon. Une fois le MN met à jour l'association entre son adresse mère et sa nouvelle adresse temporaire avec le HA, le HA peut envoyer les paquets stockés dans son mémoire de tampon au MN. Il intercepte et redirige également les paquets du CN ou du MN vers la nouvelle adresse temporaire du MN ou vers les adresses du CN respectivement pendant la phase de mise à jour d'association. Avec cette méthode, nous pouvons limiter la perte de paquets et garantir un délai acceptable. Pour étayer notre proposition, nous avons utilisé le simulateur OPNET pour simuler le déroulement des procédures du handover dans les réseaux Wi-Fi géré par la méthode E-HCF et celui géré par le protocole IPv6 Mobile. Les résultats obtenus montrent qu'avec notre méthode E-HCF, nous pouvons garantir un délai acceptable et limiter la perte des paquets. Ensuite, nous avons également validé notre méthode E-HCF avec la norme IEEE 802.11e qui supporte la Qualité de Service (QoS). Avec le support de QoS, les résultats obtenus par simulation illustrent les améliorations des performances significatives pour les communications de bout en bout dans les réseaux chargés. Nos travaux de recherche ont donné lieu à trois publications dans les conférences internationales et un article dans la revue internationale (Voir Index)
17
Banh, Mai Thi Quynh, and n/a. "Quantification, characterisation and impact evaluation of mobile IPv6 hand off times." Swinburne University of Technology, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20070608.094836.
Full textAbstract:
There is a growing range of IP-based data and voice applications using mobile devices (e.g. 3rd ,
4th generation mobile phones and PDAs) and new access technologies (e.g. Bluetooth, 802.11,
GPRS, ADSL). This growth is driving a desire to support mobility at the IP level � in other
words, allowing an IP host to keep on communicating with other hosts while roaming between
different IP subnetworks.
Mobile IPv6 allows hosts to move their physical and topological attachment points around
an IPv6 network while retaining connectivity through a single, well-known Home Address.
Although Mobile IPv6 has been the subject of simulation studies, the real-world dynamic
behavior of Mobile IPv6 is only gradually being experimentally characterised and analysed.
This thesis reviews the use of Mobile IPv6 to support mobility between independent
802.11b-attached IPv6 subnets, and experimentally measures and critically evaluates how long
an end to end IP path is disrupted when a Mobile IPv6 node shifts from one subnetwork to
another (handoff time). The thesis describes the development of an experimental testbed
suitable for gathering real-world Mobile IPv6 handoff data using publicly available, standards compliant
implementations of Mobile IPv6. (An open-source Mobile IPv6 stack (the KAME
release under FreeBSD) was deployed).
The component of handoff time due to 802.11b link layer handoff is measured separately to
assess its impact on the overall Mobile IPv6 handoff time. Using Mobile IPv6 handoff results,
the likely performance impact of Mobile IPv6 handoff on a common webcam application and a
bulk TCP data transfer is also evaluated. The impact of handoff on these applications clearly
shows that a default Mobile IPv6 environment would be highly disruptive to real-time and
interactive applications during handoff events, even if the underlying link-layer handoff was
instantaneous.
18
Banh, Mai. "Quantification, characterisation and impact evaluation of mobile IPv6 hand off times." Australasian Digital Thesis Program, 2007. http://adt.lib.swin.edu.au/public/adt-VSWT20070608.094836/index.html.
Full textAbstract:
Thesis (MEng) - Swinburne University of Technology, Centre for Advanced Internet Architectures, 2005.[A thesis submitted in total fulfillment of the requirements of for the degree of ] Masters of Engineering by Research, Centre for Advanced Internet Architectures (CAIA), Faculty of Information and Communication Technologies, Swinburne University of Technology, 2005. Typescript. Bibliography p. 153-159.
19
Georgiades, Andrew. "A security protocol for authentication of binding updates in Mobile IPv6." Thesis, Middlesex University, 2011. http://eprints.mdx.ac.uk/7955/.
Full textAbstract:
Wireless communication technologies have come along way, improving with every generational leap. As communications evolve so do the system architectures, models and paradigms. Improvements have been seen in the jump from 2G to 3G networks in terms of security. Yet these issues persist and will continue to plague mobile communications into the leap towards 4G networks if not addressed. 4G will be based on the transmission of Internet packets only, using an architecture known as mobile IP. This will feature many advantages, however security is still a fundamental issue to be resolved. One particular security issue involves the route optimisation technique, which deals with binding updates. This allows the corresponding node to by-pass the home agent router to communicate directly with the mobile node. There are a variety of security vulnerabilities with binding updates, which include the interception of data packets, which would allow an attacker to eavesdrop on its contents, breaching the users confidentiality, or to modify transmitted packets for the attackers own malicious purposes. Other possible vulnerabilities with mobile IP include address spoofing, redirection and denial of service attacks. For many of these attacks, all the attacker needs to know is the IPv6 addresses of the mobile's home agent and the corresponding node. There are a variety of security solutions to prevent these attacks from occurring. Two of the main solutions are cryptography and authentication. Cryptography allows the transmitted data to be scrambled in an undecipherable way resulting in any intercepted packets being illegible to the attacker. Only the party possessing the relevant key will be able to decrypt the message. Authentication is the process of verifying the identity of the user or device one is in communication with. Different authentication architectures exist however many of them rely on a central server to verify the users, resulting in a possible single point of attack. Decentralised authentication mechanisms would be more appropriate for the nature of mobile IP and several protocols are discussed. However they all posses' flaws, whether they be overly resource intensive or give away vital address data, which can be used to mount an attack. As a result location privacy is investigated in a possible attempt at hiding this sensitive data. Finally, a security solution is proposed to address the security vulnerabilities found in binding updates and attempts to overcome the weaknesses of the examined security solutions. The security protocol proposed in this research involves three new security techniques. The first is a combined solution using Cryptographically Generated Addresses and Return Routability, which are already established solutions, and then introduces a new authentication procedure, to create the Distributed Authentication Protocol to aid with privacy, integrity and authentication. The second is an enhancement to Return Routability called Dual Identity Return Routability, which provides location verification authentication for multiple identities on the same device. The third security technique is called Mobile Home Agents, which provides device and user authentication while introducing location privacy and optimised communication routing. All three security techniques can be used together or individually and each needs to be passed before the binding update is accepted. Cryptographically Generated Addresses asserts the users ownership of the IPv6 address by generating the interface identifier by computing a cryptographic one-way hash function from the users' public key and auxiliary parameters. The binding between the public key and the address can be verified by recomputing the hash value and by comparing the hash with the interface identifier. This method proves ownership of the address, however it does not prove the address is reachable. After establishing address ownership, Return Routability would then send two security tokens to the mobile node, one directly and one via the home agent. The mobile node would then combine them together to create an encryption key called the binding key allowing the binding update to be sent securely to the correspondent node. This technique provides a validation to the mobile nodes' location and proves its ownership of the home agent. Return Routability provides a test to verify that the node is reachable. It does not verify that the IPv6 address is owned by the user. This method is combined with Cryptographically Generated Addresses to provide best of both worlds. The third aspect of the first security solution introduces a decentralised authentication mechanism. The correspondent requests the authentication data from both the mobile node and home agent. The mobile sends the data in plain text, which could be encrypted with the binding key and the home agent sends a hash of the data. The correspondent then converts the data so both are hashes and compares them. If they are the same, authentication is successful. This provides device and user authentication which when combined with Cryptographically Generated Addresses and Return Routability create a robust security solution called the Distributed Authentication Protocol. The second new technique was designed to provide an enhancement to a current security solution. Dual Identity Return Routability builds on the concept of Return Routability by providing two Mobile IPv6 addresses on a mobile device, giving the user two separate identities. After establishing address ownership with Cryptographically Generated Addresses, Dual Identity Return Routability would then send security data to both identities, each on a separate network and each having heir own home agents, and the mobile node would then combine them together to create the binding key allowing the binding update to be sent securely to the correspondent node. This technique provides protection against address spoofing as an attacker needs two separate ip addresses, which are linked together. Spoofing only a single address will not pass this security solution. One drawback of the security techniques described, however, is that none of them provide location privacy to hide the users IP address from attackers. An attacker cannot mount a direct attack if the user is invisible. The third new security solution designed is Mobile Home Agents. These are software agents, which provide location privacy to the mobile node by acting as a proxy between it and the network. The Mobile Home Agent resides on the point of attachment and migrates to a new point of attachment at the same time as the mobile node. This provides reduced latency communication and a secure environment for the mobile node. These solutions can be used separately or combined together to form a super security solution, which is demonstrated in this thesis and attempts to provide proof of address ownership, reachability, user and device authentication, location privacy and reduction in communication latency. All these security features are design to protect against one the most devastating attacks in Mobile IPv6, the false binding update, which can allow an attacker to impersonate and deny service to the mobile node by redirecting all data packets to itself. The solutions are all simulated with different scenarios and network configurations and with a variety of attacks, which attempt to send a false binding update to the correspondent node. The results were then collected and analysed to provide conclusive proof that the proposed solutions are effective and robust in protecting against the false binding updates creating a safe and secure network for all.
20
Ali, Ahmad Hassan. "Design and Analysis of Distributed Mobility Management in IPv6 Mobile Networks." Télécom Bretagne, 2014. http://www.telecom-bretagne.eu/publications/publication.php?idpublication=14185.
Full textAbstract:
Les architectures des réseaux actuels ainsi que les protocoles de gestion de mobilité sont généralement déployés de manière centralisée. Par ailleurs, ces protocoles sont conçus pour être toujours activés, même s'il n'y pas besoin. Comme le nombre des utilisateurs mobiles et le volume de leur trafic augmentent, ces architectures centralisées sont susceptibles de rencontrer des problèmes de passage à l'échelle ainsi que des problèmes de performances. Récemment, les opérateurs de réseaux mobiles rencontrent une augmentation rapide du trafic de données mobile. Pour y faire face, une nouvelle tendance est d'aplatir les architectures de réseaux et donc les protocoles de gestion de mobilité IP doivent être adaptés à cette évolution. Par conséquent, il est nécessaire de définir des nouveaux mécanismes de gestion de mobilité qui sont distribués et actives de manière dynamique. Cette thèse concerne la conception, l'analyse et l'évaluation des nouvelles architectures de réseaux IPv6 et des protocoles de mobilité distribués et dynamiques. En particulier, nous étudions la DMM (Distributed Mobility Management). Tout d'abord, nous classons les protocoles de mobilité existants et effectuons une analyse comparative sur chaque catégorie. Ensuite, nous proposons un nouveau protocole de gestion distribuée et dynamique de mobilité basé sur MIPv6 (Mobile IPv6), avec une extension optionnelle pour l'utilisation conjointe avec SIP (Session Initiation Protocol). Après, nous effectuons une analyse de performance en termes de coûts de mobilité, du handover, et de la qualité de service. Enfin, nous étudions les impacts sur d'autres aspects tels que la sécurité et la joignabilitéCurrent network architectures, as well as mobility management protocols, are generally deployed in a centralized manner. Moreover, these protocols are designed to be always activated, even when not needed. As the number of mobile users and the volume of their traffic increase, such centralized architectures are expected to encounter scalability issues as well as performance issues. Recently, mobile network operators are experiencing a rapid increase in mobile data traffic. In order to cope with this, a new trend is to flatten networks architectures and hence IP mobility management protocols need to be adapted for such evolution. Therefore, there is a need to define novel mobility management mechanisms that are both distributed and offered dynamically. In order to cope with this context, the thesis concerns designing, analyzing, and evaluating novel IPv6 network architectures and mobility protocols that are distributed and dynamic, and in particular Distributed Mobility Management (DMM). Before proposing any extension, we categorize the existing mobility schemes and carry out a comparative analysis on each category. Then, we propose a new distributed dynamic mobility management scheme based on the Mobile IPv6 (MIPv6) protocol, with an optional extension for the joint use with the Session Initiation Protocol (SIP). After, we carry out a performance analysis in terms of mobility costs, handover, and quality-of-service. Finally, we study the impacts on other aspects such as security considerations and location management
21
Ben, Rayana Rayene. "A smart management framework for multihomed mobile nodes & mobile routers." Télécom Bretagne, 2010. http://www.theses.fr/2010TELB0130.
Full textAbstract:
Le paysage du monde des télécommunications a beaucoup changé ces dernières années. Les nouveaux mobiles, dits de quatrième génération, sont dotés de plusieurs interfaces de communication afin de mieux exploiter les différents réseaux d'accès disponibles. La prochaine étape : utiliser la multi-domiciliation, ou multihoming, pour exploiter cette diversité et assurer une connectivité fiable et peu onéreuse. Cependant, plusieurs problématiques résultent de l'utilisation simultanée de plusieurs réseaux : la consommation d'énergie, préoccupation majeure des équipementiers; l'augmentation du coût, pour la facturation à la durée; le choix des réseaux les plus “utiles” à un moment donné. . . Cette thèse décrit SmartMob6 : une architecture de gestion de la mobilité qui se propose de résoudre ces problématiques. Un algorithme de décision détermine les réseaux les plus “utiles” et désactive les interfaces inutilisées afin de préserver l'énergie et réduire les coûts. Pour le calcul dynamique de l'utilité d'un réseau, l'algorithme combine les besoins en QoS et en sécurité des flux avec les caractéristiques du réseau. La décision prend en compte les préférences de l'administrateur et celles des opérateurs. Si la demande dépasse le niveau de ressources disponibles, l'architecture propose l'utilisation d'applications adaptatives qui réduisent leur besoins en fonction des conditions. Dans ce manuscrit, nous appliquons ces idées à la mobilité IPv6 (Mobile IPv6, NEMO) dans le cadre des transports intelligents (ITS); nous exposons les résultats d'évaluation sur plate-forme réelle et nous présentons NetPyLab : Un simulateur développé afin de tester l'architectureMobile communication technologies are now moving toward full heterogeneity support. Fourth-generation mobile devices incorporate multiple interfaces with diverse access technologies. The next step: derive benefit from this heterogeneity to ensure a ubiquitous and inexpensive access to mobile devices through multihoming. However, being multihomed is intrinsically complicated. It raises several issues such as energy overconsumption, additional usage costs and it strongly motivates the proposal of decision mechanisms to choose the « right » access networks among the available ones. This thesis describes SmartMob6: A mobility management framework that addresses these issues. A decision algorithm selects the most « useful » networks and proposes to deactivate the unused interfaces to save energy and money. For the dynamic evaluation of a network utility, it suggests to combine the flow's QoS and security requirements with the network characteristics. Flows are distributed over the remaining interfaces with respect to their compatibility and their priority. This decision takes into account high-level policies coming from the administrator and also from operators as well as ISPs. In addition, the framework supports adaptive applications: When the resource level decreases, applications are asked to reduce their expectations to ensure a minimal service level. In this manuscript, we adapt these ideas to the contexts of IPv6 Mobility (Mobile IPv6, NEMO) and Intelligent Transportation Systems (ITS); we present the results of a testbed experimentation and we introduce NetPyLab: a simulator developed to test the framework
22
Wei, Guozhi Dupeyrat Gérard Wei-Liu Anne. "Optimisation du Handover dans le protocole IPv6 mobile avec la méthode E-HCF." S. l. : Paris Est, 2008. http://doxa.scd.univ-paris12.fr:80/theses/th0411965.pdf.
Full text
23
Nursimloo, Deeya Shakti. "A two-layered mobility support architecture : fast mobile IPv6 and session initiation protocol." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/5133.
Full textAbstract:
Includes bibliographical references (leaves 76-78).Real-time communications are likely to playa key role in the convergence of the Internet withvarious access network technologies. The Next Generation Network aims at providing thesereal-time services to nomadic users with roaming devices within the Internet infrastructure.Therefore, the objective of the study is to minimize the handover latency and packet lossduring any ongoing real-time communication by inter/intra domain mobility.Mobile IP (MIP) is a well-known network layer protocol that can support transparentmacromobility, and variants of the protocol such as Fast Handover for Mobile IP has beenproposed to provide an optimized handover scheme for micromobility within IP networks.Fast Mobile IP relies extensively on layer 2 information to anticipate a network handover andto redirect the traffic to the new location the mobile device is about to move to. However, theprotocol is burdened with triangular routing that introduces unacceptable delays for real-timecommunications. The Session Initiation Protocol (SIP) is an application layer protocol that provides different types of mobility from service to terminal mobility. Terminal mobility in SIP supports realtime communications over User Datagram Protocol (UDP). The main drawbacks in the SIP mobility framework are the call disruption delays incurred when a mobile device is in an overlapped region and the absence of mobility management on the Transport Control Protocol (TCP) connections. This project proposes an integrated mobility scheme that combines procedures of Fast Handover for Mobile IP and SIP mobility for real-time communications over UDP. An analysis of the existing protocols i.e. network layer Fast Mobile Handover for IP and SIP mobility is presented. The integrated proposed scheme efficiently aims at reducing the handover latency and packet loss for ongoing real-time conversations, i.e. Voice over IP (VoIP) call and the streaming of a video application. Simulation results presented are based on the network simulator ns-2. The simulation results compare and analyze the performance of the proposed integrated scheme to the existing protocols. Thus, the proposed architecture presents a powerful handover mobility support for Next Generation IP-based wireless systems. Recommendations for future work have been presented to further evaluate and optimize the use of the proposed integrated handover scheme.
24
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.
Full textAbstract:
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.
25
Blomqvist, Mattias. "An implementation of Mobile IPv6 over theVDL Mode 4 data link for civil aviation." Thesis, Linköping University, Department of Computer and Information Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57608.
Full text
26
Lau, Chee Kong Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Improving mobile IP handover latency on end-to -end TCP in UMTS/WCDMA networks." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/22806.
Full textAbstract:
Due to terminal mobility and change of service area, efficient IP mobility support is an important aspect in UMTS networks in order to provide mobile users negligible packet loss rate and low handover latency, and thus some level of guaranteed quality-ofservice (QoS) to support real-time applications. 3G/UMTS has been specified and implemented as an end-to-end mobile communications system. The underlying WCDMA access systems manage radio access handover (layer 1) and provide linklayer mobility (layer 2) in terms of connection setup and resource management. For the UMTS nodes to have seamless connectivity with the Internet, the UMTS core networks need to be able to support continuous and no network service session handover (layer 3 and above). A long IP handover latency results in high packet loss rate and severely degrades its end-to-end transport level performance. Network-layer handover latency has therefore been regarded as one of the fundamental limitations in IP-based UMTS networks. Therefore, it is crucial to provide efficient network-layer mobility management in UMTS/WCDMA networks for seamless end-to-end TCP connection with the global Internet. Mobility of UMTS nodes necessitates extra functionalities such as user location tracking, address registration and handover related mechanisms. The challenge to provide seamless mobility in UMTS requires localised location management and efficient IP handover management. Mobile IPv6 protocol offers a better mobility support as the extended IPv6 features with mobility mechanism are integrated to the mobile nodes. To mitigate the effect of lengthy IP handover latency, two well-known handover reducing mechanisms based on Mobile IPv6 support have been proposed in the literature. They are designed with hierarchical network management and address pre-configuration mechanism. Hierarchical management aims to reduce the network registration time, and fast-handover attempts to minimise the address resolution delay. S-MIP (Seamless Mobile IP) integrates the key benefits of the above IP mobility mechanisms coupled with local retransmission scheme to achieve packet lossless and extremely low handover latency, operating in WLAN environments. In this thesis, we explore the possible Mobile IP solutions and various IP handover optimisation schemes in IPv6 to provide seamless mobility in UMTS with the global Internet. It aims at developing an optimised handover scheme that encompasses the packet lossless and extremely low handover latency scheme in S-MIP, and applying it into the UMTS/WCDMA packet data domain. Therefore, the hybrid UMTS-SMIP architecture is able to meet the requirements of delay sensitive real-time applications requiring strict delay bound, packet lossless and low handover latency performance for end-to-end TCP connection during a UMTS IP-based handover. The overall seamless handover architecture in UMTS facilitates integrated, scalable and flexible global IP handover solution enabling new services, assuring service quality and meeting the user???s expectations in future all-IP UMTS deployment. The viability of the seamless mobility scheme in UMTS is reflected through and validated in our design model, network protocol implementation, and service architecture. We illustrate the performance gained in QoS parameters, as a result of converged UMTS-SMIP framework compared to other Mobile IPv6 variants. The simulation results show such a viable and promising seamless handover scheme in UMTS on IP handover latency reduction on its end-to-end TCP connection.
27
Steinleitner, Niklas. "Firewall Traversal in Mobile IPv6 Networks." Doctoral thesis, 2008. http://hdl.handle.net/11858/00-1735-0000-0006-B3B0-2.
Full text
28
Tsaur, Ding-Bang, and 曹定邦. "The Implementationof Mobile-IP in IPv6." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/47792169914457941409.
Full textAbstract:
碩士國立交通大學
資訊科學研究所
86
The previous version of Mobile-IP was designed within the IETF to serve the mobile computer users who wish to connect to the Internet as they move from place to place. With the explosive growth in the number of Internet hosts and the multimedia environment, IPv6 and Mobile-IPv6 are being designed as a replacement for IPv4 and Mobile-IP. In this thesis, we follow the latest version of the internet drafts to implement the Mobile-IPv6 system in Linux IPv6 environment. In our system, each mobile host can communicate with other hosts correctly without modifying any network configuration, regardless of its current point of attachment to the Internet.
29
Chen, Tzu-Cheng, and 陳子成. "Enhanced MAP Selection for Hierarchical Mobile IPv6." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/44197729889309323088.
Full text
30
Vojini, Sumith Dev. "Reducing handoff latency in proxy mobile IPv6." Thesis, 2014. http://hdl.handle.net/1805/4449.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)Mobile IP though allows mobility features to a node it suffers from signaling Latencies which are mainly incurred due to the fact that the MN itself is involved in the handover process. To overcome this problem proxy mobile IPv6(PMIPv6) was defined where the mobility signaling is taken care of by a proxy server while keeping track of the MN's movement. PMIPv6 has considerably reduced the handover latency but the demand for real time applications over the network has increased tremendously due to recent explosion of the cloud era. My thesis focuses on increasing the L3 handoff signaling efficiency by reducing the latency. This is achieved by our idea to do both the AAA authentication as well as the LMA registration in PMIPv6 at the same time. The simulation results show that our proposed approach perform better than the current PMIPv6 L3 handover signaling reducing the latency as well as packet loss.
31
Liu, Hao-Fan, and 劉浩帆. "A DIFFSERV MUTLICASTING IN MOBILE IPV6 NETWORKS." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/29651628367988558827.
Full textAbstract:
碩士銘傳大學
資訊工程學系碩士班
97
In this paper we propose an approach to establish a DiffServ-aware multicast tree in a mobile IPv6 network. First, we use a modified Dijkstra algorithm to compute the maximum available bandwidth map (MABM) to all nodes. Then, a DiffServ-aware multicast tree can be constructed by referring to the MBM. Each core router in the established multicast tree must maintain a new quality of service (QoS) table in order to forward the received multicast packets to the mobile node (MN). Finally, when a MN moves to a new network, a tunnel must be established in order to satisfy the MN’s QoS. The simulation results have shown that the proposed approach has better performance, especially in the case where the traffic is high.
32
Chuang, Ming-Chin, and 莊明晉. "Authentication Mechanism of Mobile Ad Hoc Network based on Mobile IPv6." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/vc6r69.
Full textAbstract:
碩士朝陽科技大學
資訊工程系碩士班
93
In recent years, the wireless communication technology rapidly develops and the mobile devices are in widespread used. The Internet Engineering Task Force (IETF) Mobile IP working group has proposed the Mobile IP to support IP mobility, and it keeps a session connected when a mobile node roams from subnet to subnet. Novel network type is the mobile ad hoc network (MANET) which is formed by a set of mobile devices with limited power and using multi-hop communication capabilities without through any infrastructure. In order to move to an all-IP environment, we use mobile IP to provide global Internet connectivity for ad hoc networks. However, the security problems are seemed more and more important. We must avoid routing packet attacks such as packet forgery attack and packet modification attack. In addition, we also must consider the authentication problem. Before using the resource, the mobile node must be verified whether legally or not. In this thesis, we will propose an efficient authentication mechanism in mobile IP, and secure routing protocol in MANET. Finally, we propose an authentication mechanism in mobile ad hoc network which is aided with mobile IP. And we can achieve the security routing and verify the user.
33
Jun-WeiHuang and 黃俊維. "Improved aDAD Mechanism in Fast Mobile IPv6 implementation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/25764961325754850116.
Full textAbstract:
碩士國立成功大學
電信管理研究所
98
While wireless technology is more and more popular nowadays, there are still some technical obstacles that must be overcome before mobile networking can become wide-spread. Mobile IP technology is used to maintain users’ network connections when mobile hosts are traveling between different subnetworks. However, in order to avoid the address collisions, MIPv6 must perform the address duplicate detection (DAD). The DAD procedure is defined in RFC 3775 standard and is a time-consuming task. Although techniques such as advanced DAD (aDAD) and optimistic DAD (oDAD) have improved this latency, both methods have limitations. In this thesis, we enhance aDAD handover protocol by reducing the delay while handover messages are exchanged between base stations. Therefore, mobile users can immediately receive responds from serving-router after they make their requests to handover to new subnetworks. We use the “Network Simulator version 2” to evaluate the performance of the proposed mechanism. Furthermore, we set up different simulation scenario to compare the handover performance of our mechanism in this thesis with the ordinary aDAD handover strategy.
34
Chiu, Jung-Chia, and 邱榮嘉. "Improved Handoff Performance in Hierarchical Mobile IPv6 Networks." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/40164624388905464269.
Full textAbstract:
碩士國立中山大學
資訊工程學系研究所
92
In wireless/mobile networks, users freely change their service point while they are communicating with other users. In order to support the mobility of mobile nodes, Mobile IPv6 (MIPv6) is proposed in IETF, in which an MN must inform its home agent the binding of its home address and the current care-of address (CoA). The home agent forwards packets to CoA when it receives packets for the MN. There is a significant problem in MIPv6 due to its inability to support micro-mobility cause by long delay and high packet loss during handover. Hierarchical mobile IPv6 (HMIPv6) is proposed to separate mobility into micro-mobility (within one domain) and macro-mobility (between domains). HMIPv6 introduced a new protocol element called Mobility Anchor Point (MAP) to manage the mobility. HMIPv6 can reduce the delay and the amount of signaling during handover. However HMIPv6 only improves micro mobility problem where the significant delay still occurs in macro mobility management. Duplicate address detection and the transmission time during the handoff operation could cause high delays. This paper considers handover operations. By simulations, we show that the proposed scheme can realize low handoff delay and packet loss during handover.
35
CHEN, LIANG-YU, and 陳亮宇. "A Novel Predictive Scheduling Handover on Mobile IPv6." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/53022564905230425730.
Full textAbstract:
碩士國立東華大學
電機工程學系
94
Wireless network provide the possibility of mobile network phone, but we still need a smooth handover mechanism. In this paper, we pro-posed a Scheduling Handover mechanism based on Mobile IPv6 (SMIPv6). In SMIPv6, new care-of-address is gated by IP preconfiguration. After that, we calculate a good timing to proceed the handover. Compared with FMIPv6(Fast handover for MIPv6), SMIPv6 leave out the tunnel mechanism, and reduce the waste of bandewith. Otherwise, without the tunnel mechanism, we can reduce the CPU loading of Access Routers. Finally in our simulaction, SMIPv6 have good handover efficiency, and won't account packets sequence disorder.
36
Cheng, Yu-Hsin, and 鄭育欣. "An Enhanced Handoff Scheme for Mobile IPv6 Networks." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/g3pa5m.
Full textAbstract:
博士國立中興大學
資訊科學與工程學系所
101
In the MIPv6 Networks, when a mobile node (MN) moves and changes its point of attachment, a handoff process is triggered to retain the communication. Since the high handoff delay may be unacceptable for delay-sensitive applications such as VoIP, this study focuses on the handoff efficiency in the IPv6 network. As for the handoff execution, both the movement detection and the IP address acquisition are the most time-consuming procedures. Especially, the IP address acquisition requires the lengthy Duplicate Address Detection (DAD) process to ensure the uniqueness of the Care-of Address (CoA). In this study, a cross-layer fast handoff scheme is proposed to effectively reduce the handoff latency. In addition, a predictive AP selection algorithm is proposed to avoid unnecessary handoffs. To validate the feasibility of the proposed approach, several scenarios are simulated to compare the performances of the proposed approach and two most commonly referenced mobility management protocols, namely Mobile IP (MIP) and Session Initiation Protocol (SIP). The simulation results show that for SIP mobility, handoff latency of the proposed scheme is about one-fourth of the time required by applying the conventional scheme. For Mobile IPv6 mobility, handoff latency of the proposed scheme is only one-half of the latency required by applying the conventional scheme. The average handoff frequency improvement in the scenarios of moving randomly and moving straight are 3% and 27%, respectively. Moreover, a Time-Oriented Care-of Address (TOCoA) generation method is also presented in the proposed cross-layer fast handoff scheme to effectively reduce the probability of duplicate CoA.
37
Wang, Hong-Ting, and 王宏庭. "Investigation for High Performance Mobile IPv6 Addressing Scheme." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/p3amn8.
Full textAbstract:
碩士逢甲大學
電子工程所
90
Computer, telephony, and cable systems will be integrated and become an All-IP environment. We have almost run out of IPv4 addresses. Although some solutions are developed to solve the lack of address, IPv4 still can’t support the huge address requirement in the future. IPv6 address can provide the requirement and is defined as the next generation addressing scheme. To develop IPv6 related technologies in Taiwan earlier, to develop a good communication scheme for 4G All-IP environment, this paper develops a new scheme for mobile IP addressing. Some fields are added or redefined in IPv6 to simplify the trivial addressing scheme in original mobile IPv6 scheme, to improve the efficiency that from addressing to registering. And devise a way to solve triangle routing and communication broken while changing address since roaming. In the data structure of Binding Cache, this paper takes advantage of the hierarchical aspect of IPv6 address to reduce it’s storage, and to accelerate the routing speed and reduce the quantity of data transmission.
38
Lin, PO-chun, and 林柏均. "Design and Implementation of Dual Stack Mobile IPv6." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/19162154990138108251.
Full textAbstract:
碩士國立中正大學
通訊工程研究所
97
IPv4 address space will be exhausted and IPv6 is an imperative under this situation. However, in the early stage of IPv6 deployment, many networks still support IPv4 only. Instead of complete replacement, IPv6 networks and services will co-exist with IPv4 for quite a long time. With the rapid growing of mobile users, IP mobility management is more and more important. IETF defines Mobile IPv4 and Mobile IPv6 (MIPv6). Mobile users require accessing IPv4 or IPv6 services through IPv4 or IPv6 networks in IPv4 and IPv6 co-existed networks. To provide full mobility, we need a turnkey mobility management schemes in such IPv4 and IPv6 co-existed networks during the transition to full IPv6. Dual Stack Mobile IPv6 (DSMIPv6) extends MIPv6 to allow the registration of IPv4 addresses and the transport of both IPv4 and IPv6 packets over the tunnel between the home agent and mobile nodes. It also allows mobile nodes to seamlessly roam over both IPv6 and IPv4 networks, even if over pure IPv4 networks. For the scenarios mentioned above, the author implements DSMIPv6. The author modifies the MIPv6 package from UMIP, and fills the gap of IPv4 with new modules. Finally the verification and assessment of this implementation is presented.
39
Yang, Fu-Chen, and 楊富丞. "Security of Route Optimization in Mobile IPv6 Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/58583980722893404099.
Full textAbstract:
碩士國立暨南國際大學
資訊管理學系
97
Many wireless applications and mobile communication services are provided through IP networks. This brings the increased popularity of mobile users, but also introduces the problems of IP address shortage and demands for mobility support in IP networks. Therefore, IETF defines mobility support in IPv6, i.e. MIPv6, to allow nodes to remain reachable while moving around in the IPv6 internet. When a node moves and visits a foreign network, it is still reachable through the indirect packet forwarding from its home network. This triangular routing feature provides node mobility but increases the communication latency between nodes. In order to further eliminate triangular routing, IETF proposes a binding update (BU) scheme, which enables nodes communicate directly. This process of enabling direct packet delivering is called Route Optimization. To protect the security of BU message, a Return Routability (RR) procedure was proposed. However, it was found that RR is vulnerable to many attacks. In this thesis, we consider two different mobile IPv6 authentication architectures and propose two securing Binding Update message schemes for each architecture. In the infrastructureless environment, neither trusted third party nor certificate authority exists. We adopt CGA (Cryptographic Generated Address) scheme to propose two solutions based on Diffie Hellman key agreement and geometric computation respectively. In the infrastructure environment, there exists a third-party trusted Certificate Authority (CA) and different AAA servers, which also behave as PKGs (private key generators), distributed in different network domains. According to distinct privacy requirements, we present two secure BU schemes, adopting ID-based multi-signature and encryption respectively across multi-PKGs.
40
Sun, Shih-Feng, and 孫世峰. "IPv6-based Mobile Routers for Network Mobility Applications." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/48636113372985023548.
Full textAbstract:
碩士國立東華大學
資訊工程學系
93
As wireless networking technology advances and the increasing users’ geographical mobility increases, many Mobile Nodes (MN) could use their own IP addresses to communicate through wireless media. Mobile IPv6 (MIPv6) allows MNs using their permanent home address to remain reachable regardless of their locations on an IPv6 network. The IETF has recently explored Network Mobility (NEMO) issues to achieve ubiquitous computing. NEMO is concerned with managing the mobility of an entire network, viewed as a single unit, which keeps its reachability in the Internet topology when it changes its attachment point. This study integrates NEMO and Virtual Private Networks (VPN) to develop IPv6-based Mobile Routers (MR) for mobility applications. The proposed method is simple, yet it enhances the functionality of MIPv6-enabled MN to form the MR and establish the NEMO environment. Then, the developed MR is experimented with the IPv6-based applications, ping6 and VideoLAN. A NEMO networking environment with ICMPv6 applications was created to study the developed MR performance. Experimental results indicate that the round-trip time increases when the packets increase in size. Although using MR may increase transmission time and packet loss caused by the encapsulation and decapsulation process, it also reduces handoff latency when the number of MNs reaches two or more. Instead of the MNs, MR will perform the handoff process only once. The MR also offers an easy central point for managing the mobility features of the entire network to reach to better manageability. In the aspects of power consumption, the radio transmission distance from the nodes within mobile network to the MR is potentially shorter than to Access Router (AR) on the Internet. If the MR is employed as an AR, the nodes need only communicate with the MR with minimal power. We believe that the vehicles with the proposed MRs make Internet applications easy to access in the future.
41
Kuei-Ping, Wang, and 王貴平. "Integration and Verification of Mobile IPv6 with GPRS." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/49431497257733535909.
Full textAbstract:
碩士國立臺灣大學
電機工程學研究所
91
A single generic mobility handling mechanism that allows roaming between all types of access networks would allow users to conveniently move between fixed and mobile networks, between public and private networks as well as between PLMNs with different access technologies. The ongoing work in the IETF Mobile IP working group is targeted towards such a mechanism. To offer Mobile IP also to UMTS and GPRS users, a solution is needed for how to use Mobile IP in overlay to UMTS/GPRS. The main goal of this thesis is to offer Mobile IPv6 to GPRS users by defining enhancements to the current GPRS standards to allow Mobile IPv6 to be used as an overlay to UMTS/GPRS for release 99. In this thesis, the concepts of GPRS, Mobile IPv6, and SDL are introduced in turn. At the same time, we would research and analysis integrating Mobile IPv6 with IPv6 Address Autoconfiguration in GPRS to offer Mobile IPv6 to GPRS users. At last, the implementation of the enhancements to the current GPRS standards to allow Mobile IPv6 to be used as an overlay to UMTS/GPRS for release 99 are presented in the thesis.
42
Chen, Rui-Yi, and 陳瑞鎰. "Mobile IPv6 and AAA Architecture based on WLAN." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/62322986353203373304.
Full textAbstract:
碩士國立東華大學
電機工程學系
91
Mobility support for Internet devices is quite important for consumer electronics or Internet appliance (IA) and the number of the handled device is growing up quickly. However, the IP addresses are not enough for the number of the rapidly grow devices in the All-IP generation. So the Internet Protocol version 6(IPv6) is adopted to solve these problems. Our purpose structure is based on the IEEE 802.11, but the IEEE 802.11 has denounced drawback in its security issues. Further, for various Internet Service Providers’ point of view, the accounting is even a more important problem. So we combine Mobile IPv6 and AAA based on IEEE 802.11 to overcome these problems. Both Internet Protocol version 4 (IPv4) and IPv6 was supported by IP security when they exchange data packets across IP network. IPsec operates at the IP layer, it can keep the network safe. In a master and client system, the master system can authenticate the client node identity. If the clients pass the authentication then the master node will authorize it. So IPsec can support the system authentication and authorization. But it is in lack of system accounting function. So ISPs can not have correct bills and their benefit will fall victim. This is the reason why we choose to let the wireless network combine AAA functions. There are other kinds of security mechanism. For example, VPN or SSL are also well known security mechanisms. It maintains the safety between master and client too. But it is not suitable for the mobility environment. In VPN, there will have some difficult routing problems. In SSL, it must be operated through browser. In the finally, we will try to add the SSL structure that to protect the security in wireless communication. Hence, in this thesis we use AAA mechanism to protect the security, let the architecture have the functionality of authentication, authorization, and accounting. Maybe AAA mechanism is not useful but we will discuss the benefit of AAA with the others and the reason why we choose AAA to combine the mobility architecture.
43
孫正忠. "Using Mobile IPv6 to Integrate the Internet and Mobile Ad Hoc Networks." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/20813133042027357028.
Full textAbstract:
碩士國立交通大學
電機資訊學院碩士在職專班
92
Computers and other electronic equipments are already widely used in our daily life. Recently, there is a trend to provide users to access networks in an any-time any-where manner. Wireless network technologies have progressed rapidly. Using wireless local networks to access the Internet has become popular in the last few years. On the other hands, an ad hoc network is an infrastructureless network which does not need any base station. To support IP mobility in an ad hoc Internet integrated environment, we consider IPv6. IPv6 supports security, auto configuration, enhanced routing, and host mobility. It will be the best choice for an ad hoc Internet integrated environment. In this thesis, we modify Mobile IPv6 to facilitate network discovery. The related protocols are investigated and feasibility study is reported.
44
Lin, Wen-Ching, and 林文慶. "Mobility Management of Mobile Nodes in Multi-level Hierarchical Mobile IPv6 Network." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/j48a3r.
Full textAbstract:
碩士朝陽科技大學
資訊管理系碩士班
92
Hierarchical Mobile IPv6(HMIPv6) provides a solution to manage the local movements of Mobile Nodes’(MN) based on a hierarchical architecture. HMIPv6 utilizes a Mobility Anchor Point(MAP) to reduce the considerable number of Mobile IPv6 Binding Update messages(BU) among the MN, Correspondent Nodes(CN), and its Home Agent(HA). It achieves a faster handover time. HMIPv6 is especially effective in a wide area network having a multilevel hierarchy. More than one MAP above the Access Router(AR) can be used for redundancy and as an optimization for the different mobility scenarios(i.e., high mobility or low mobility) experienced by MN. However a MN cannot know whether it has a high or a low mobility in a multilevel HMIPv6 network. Therefore, the MN cannot reasonably select an appropriate MAP. This may cause frequent re-registrations of MN and load-unbalanced MAP. Hence, it is important that (1) a MN register to an appropriate MAP to avoid frequent re-registrations, and (2) too many MNs concentrate on a MAP for load balancing. A fast MN will perform more frequent handoffs than a slow MN. But, in a HMIPv6 domain where several MAPs are discovered by the MN in one domain. This article proposes a scheme by using Router Renumbering mechanism combined with fuzzy location management mechanism to select an appropriate MAP in multilevel HMIPv6 wireless network. This scheme achieves that (1) A MN can select an appropriate MAP according to the mobility type of the MN in the multilevel HMIPv6 wireless network. (2) The frequent re-registrations of MN are reduced. (3) The load of MAP is balanced.
45
Yen-Ming, Chu, and 朱彥銘. "Smooth Handoff for the Next Generation Cellular Mobile System: Cellular Mobile IPv6." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/60180955035639799510.
Full textAbstract:
碩士國立東華大學
電機工程研究所
88
Recent initiatives to add mobility to the Internet and packet data services for next generation cellular systems are being considered by many mobile service providers. IPv6 is a new version of the Internet Protocol that was standardized by the Internet Engineering Task Force (IETF). It supports mobility and is presently being standardized by the IETF Mobile IP Working Group. At the same time, cellular is an inevitable and developing architecture for the Personal Communication Service system (PCS). In this thesis, Cellular Mobile IPv6 (CMIv6), a new solution that is migrated from Mobile IPv6 is proposed for mobile nodes moving among small wireless cells at high speed. It is important for future mobile communication environments and should eventually integrate its functions with the Internet. The purpose of this thesis is to solve the problems of communication break within smaller cellular coverage during high-speed movement with packet-switched data or the real-time voice messages. Thus, voice over IP (VoIP) packets were chosen to implement the system. Simulation results show smooth and non-breaking handoff during high-speed movement using the proposed algorithm.
46
Ming-Fu, Hsieh, and 謝明甫. "Neighbor-Cooperated Multicast for seamless Handoff in Mobile IPv6." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/83456901209544213496.
Full textAbstract:
碩士國立臺灣大學
資訊管理研究所
90
As the development of mobile Internet ,various of services such as real-time video conferencing and data transferring. Mobile IP provides Internet users of capability to mobile usage of Internet, users of Mobile IP can keep their own home IP after attached to new network and communicate with other hosts with it. IPv6 is a next generation Internet Protocol, it solved the problem of insufficient address space in IPv4, which helped to encourage the development of mobile Internet which acquire a large number of Internet addresses. The main environment of mobile computing is wireless network, when a host move between different wireless network, the handoff procedure will trigger the rediction of packets in Mobile IP, which enable mobile users to keep their connection after changes of IP network. But the redirection procedure proceeded by Mobile IP incur long latenct and further incur loss of packets during handoff. The work is to design a architecture for minimizing the handoff latency and packets lost during handoff in Mobile IPv6. Proposed new architecture deploys hierarchical nodes in local network to proceed with so-called Neighbor Cast, minimizing handoff latency. Also we take advantage of buffering to recover the loss packets during handoff, thus achieving seamless handoff. After some simple analysis and simulation results, we found that with our new architecture, we can achieve seamless independent of lower layer with justifiable overhead.
47
hsün, chuang ming, and 莊明勳. "Handover Management for Mobile Node in IPv6 Wireless Networks." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/00980588848469172481.
Full textAbstract:
碩士亞洲大學
電腦與通訊學系碩士班
95
Third generation(3G) personal wireless communication networks,provide wide range but low data rate services, while the wireless local area networks(WLAN) provide limited range but high data rate services. Thus, 3G and WLAN are complementary in the services their provide. As a consequence of progress in technology, a common goal of the telecommunication industry is to provide service for mobile users to roam among heterogeneous networks. As far as the roaming service is concerned, how to reduce the handover latency is a big challenge. Moreover, when the mobile nodes are fast moving, the care-of address is frequently changed. As a result, the foreign agents in the mobile IPv6 networks can not forward the packets to the care-of-address of the mobile nodes currently used. In turn, communications interrupt may occur. This these studies the problems of the mobile nodes in wireless mobile IPv6 networks switching among WLAN and 3G heterogeneous networks. We propose a mobility management mechanism to reduce the handover latency and the probability of communication interruption due to incorrect care-of address
48
Tseng, Guan-Hua, and 曾冠樺. "Enhanced MIPv6(EMIPv6):Mobile IPv6 Extensions for Existent Internet." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99043719454794255038.
Full textAbstract:
碩士大葉大學
資訊工程學系碩士班
95
Mobile IP is developed by IETF for increasing needs of user mobility. Mobile IP defines a global mobility solution that provides host mobility management on the Internet. In Internet environments, when an MN (Mobile Node) moves from its HN (Home Network) and attaches itself to FN (Foreign Network), it obtains a new IP address to retain its network connectivity. Moreover, Mobile IPv6 has been introduced by IETF, in order to adapt the next generation internet protocol IPv6. Most internet backbone today is still supporting IPv4 only. However, Mobile IP and Mobile IPv6 are designed for IPv4 only and IPv6 only respectively. We propose a novel mechanism to integrate Mobile IPv6 and existent internet. This mechanism also introduces the IPv6 destination options extension header for route optimization. We compared our mechanism with EMIPv4 [10] to investigate the loading on HNGW (Home Network Gateway) and the end to end delay between MN and CN. According the discussion, we claim that our method yields significant improvement, and does not introduce much burden to network equipments.
49
Li, Cheng-Ying, and 李政穎. "A Self-organized IPv6-based Mobile Ad Hoc Network." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/83621445514553715820.
Full textAbstract:
碩士國立中正大學
通訊工程研究所
93
The IPv6-enabled network architecture has recently attracted much attention. In this thesis, we address the issue of connecting MANETs to global IPv6 networks while supporting IPv6 mobility. Specifically, we propose a self-organizing, self-addressing, self-routing IPv6-enabled MANET infrastructure, referred to as SOMANET. The proposed self-organization addressing protocol automatically organizes nodes into tree architecture and configures their global IPv6 addresses. Novel unicast and multicast routing protocols, based on longest prefix matching and soft state routing cache, are specially designed for the SOMANET. Mobile IPv6 is also supported such that a mobile node can move from one SOMANET to another. Moreover, a P2P information sharing system is also designed over the proposed SOMANET. We have implemented a prototyping system to demonstrate the feasibility and efficiency of the SOMANET and the P2P information sharing system. Simulations are also conducted to show the efficiency of the proposed routing protocols.
50
Huang, Ming-Jen, and 黃銘仁. "Study of MAP Selection Algorithm in Hierarchical Mobile IPv6." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/81622359946268733512.
Full textAbstract:
碩士國立中央大學
通訊工程研究所
93
The Mobile IPv4 and Mobile IPv6 were proposed by IETF as the main protocols for supporting IP mobility. Because of some shortcomings of Mobile IPv6, Hierarchical Mobile IPv6 (HMIPv6) has been proposed to minimize the signaling overhead and handover latency by deploying Mobility Anchor Point (MAP) in the network. In this thesis, we proposed a MAP selection algorithm in a network with tree-based hierarchy. Mobile Node (MN) can select an appropriate MAP to register according to its mobility pattern. And we introduce the concept of abstract MAP, it can effectively reduce the frequency of Inter-domain handoff and then to minimize the signaling overhead and handover latency. Additionally, we introduce the load balance mechanism in the abstract MAP to avoid the overload in some MAP. Finally, the performance of the proposed scheme is evaluated through simulation experiments. The simulation results show that our scheme can minimize the handover latency and the load of each MAP node can be more balance. It also shows that the amount of MNs in the network and the mobility pattern of all MNs shall be carefully considered for the achievement of a suitable abstract MAP.