Rozprawy doktorskie: „Mobility Management”

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ARCO, EMERE. "Geomatics for Mobility Management. A comprehensive database model for Mobility Management". Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2711582.

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In urban and metropolitan context, Traffic Operations Centres (TOCs) use technologies as Geographic Information Systems (GIS) and Intelligent Transport Systems (ITS) to tackling urban mobility issue. Usually in TOCs, various isolated systems are maintained in parallel (stored in different databases), and data comes from different sources: a challenge in transport management is to transfer disparate data into a unified data management system that preserves access to legacy data, allowing multi-thematic analysis. This need of integration between systems is important for a wise policy decisions. This study aims to design a comprehensive and general spatial data model that could allow the integration and visualization of traffic components and measures. The activity is focused on the case study of 5T Agency in Turin, a TOC that manages traffic regulation, public transit fleets and information to users, in the metropolitan area of Turin and Piedmont Region. In particular, the agency has set up during years a wide system of ITS technologies that acquires continuously measures and traffic information, which are used to deploy information services to citizens and public administrations. However, the spatial nature of these data is not fully considered in the daily operational activity, with the result of difficulties in information integration. Indeed the agency lacks of a complete GIS that includes all the management information in an organized spatial and “horizontal” vision. The main research question concerns the integration of different kind of data in a unique GIS spatial data model. Spatial data interoperability is critical and particularly challenging because geographic data definition in legacy database can vary widely: different data format and standards, data inconsistencies, different spatial and temporal granularities, different methods and enforcing rules that relates measures, events and physical infrastructures. The idea is not to replace the existing implemented and efficient system, but to built-up on these systems a GIS that overpass the different software and DBMS platforms and that can demonstrate how a spatial and horizontal vision in tackling urban mobility issues may be useful for policy and strategies decisions. The modelling activity take reference from a transport standards review and results in database general schema, which can be reused by other TOCs in their activities, helping the integration and coordination between different TOCs. The final output of the research is an ArcGIS geodatabase, tailored on 5T data requirements, which enable the customised representation of private traffic elements and measures. Specific custom scripts have been developed to allow the extraction and the temporal aggregation of traffic measures and events. The solution proposed allows the reuse of data and measures for custom purposes, without the need to deeply know the entire ITS environment system. In addition, The proposed ArcGIS geodatabase solution is optimised for limited power-computing environment. A case study has been deepened in order to evaluate the suitability of the database: a confrontation between damages, detected by Emergency Mapping Services (EMS), and Traffic Message Channel traffic events, has been conducted, evaluating the utility of 5T historical information of traffic events of the Piedmont floods of November 2016 for EMS services.

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PATRIARCA, FABIO. "Mobility management in IP networks". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2015. http://hdl.handle.net/2108/214297.

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Tantayakul, Kuljaree. "Mobility Management in New Internet Architectures". Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/23732/1/Tantayakul_Kuljaree.pdf.

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The software integration with new network architectures via Software-Defined Networking (SDN) axis appears to be a major evolution of networks. While this paradigm was primarily developed for easy network setup, its ability to integrate services has also to be considered. Thus, the mobility service for which solutions have been proposed in conventional architectures by defining standardized protocols should be rethought in terms of SDN service. Mobile devices might use or move in SDN network. In this thesis, we proposed a new mobility management approach which called "SDN-Mobility" and has shown that SDN can be implemented without IP mobility protocol for providing mobility like as Proxy Mobile IPv6 (PMIPv6) that is the solution adopted by 3GPP, with some performance gain. However, PMIPv6 and SDN-Mobility have some packets loss during Mobile Node (MN) handover. Thus, in this thesis, we proposed a new paradigm based on caching function to improve the quality of transfer during handover. Caching policy cooperates with SDN controller for automatic buffering of the data during the handover. We proposed two caching policies that are compared through a performance analysis regarding the quality of transfer for the user and for the operator. This thesis also presented that SDN-Mobility with caching policy can be applied easily for mobility management in heterogeneous network architectures able to integrate the future Internet based on the Information-Centric Networking (ICN).

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Gelinder, Martin. "Mobility Management : Ett nygammalt koncept med fokus på beteendeförändring". Thesis, Uppsala universitet, Kulturgeografiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-315000.

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Mobility Management (MM) eftersträvar ett helhetstänk där all samhällsplanering bedöms påverka trafikflöden och resmönstren. Områden som traditionellt inte tillhör trafikplanering anses inom konceptet Mobility Management vara medskapare i att nå effektiv mobilitet. Syftet med uppsatsen är att undersöka konceptets ursprung och dess innebörd, med tonvikt på de argument som åberopas för att få människor att ändra sitt resebeteende i hållbar riktning. Jag jämför även Mobility Management med tidigare planeringideal för att placera konceptet i ett sammanhang och finna ursprunget till idéerna. Genom att läsa dokument från nätverket Möjligheter med Mobility Management i Samhället (MMMiS), Trafikverket, SKL, Trivector och regeringen bildar jag en uppfattning om Mobility Managements innebörd i Sverige idag och sökte granska innehållet efter generella drag. Uppsatsen är därigenom en dokumentsanalys och en kvalitativstudie av Mobility Management. I uppsatsen finner jag att Mobility Management som koncept inte står ensamt mot sitt ursprung och innebörden är inte helt frånskild från tidigare trafikplanering. Skillnaden är dock att vi nu tydligare kan se att trafikplanering och övrig samhällsplanering hör samman.

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Shiaa, Mazen Malek. "Mobility management in adaptable service systems". Doctoral thesis, Norwegian University of Science and Technology, Department of Telematics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-882.

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Telecommunication service systems have been developing rapidly during the last five decades. The service architectures as well as the technologies for design, implementation, deployment, execution, and management of the services have been under continuous development. The focus of this thesis is mobility management in adaptable service systems. Adaptable service systems are service systems that adapt dynamically to changes in both time and position related to users, nodes, capabilities, status and changed service requirements and mobility management is the handling of movements of the various components that can potentially move. As examples persons, services, terminals, nodes, capabilities, data and programs can move. Mobility management allows services to find locations, and to deliver certain content to the users or terminals regardless of their location. This thesis is focusing on the movement of persons, services, programs and terminals.

The thesis is related to TAPAS (Telematics Architecture for Playbased Adaptable Service Systems) research project. This project started in 1997 and has been founded by the Norwegian Research Council and the Department of Telematics at NTNU.

The thesis has four main parts: 1) a generic terminology framework, 2) a mobility management architecture, 3) a design model for the basic mechanism used to specify and realize the services, i.e. the role-figure model, and 4) a formal model and analysis of the role-figure model. The terminology framework is the basis for the mobility management architecture. Three main mobility types are handled. These types are personal mobility, role-figure mobility, and terminal mobility. For each of these mobility types a set of generic concepts, definitions, and requirement rules are presented.

The mobility management architecture defines the structure and the functionality of the entities needed to handle the various mobility types. The mobility management architecture is worked out within the context of TAPAS.

The role-figure model is an abstract model for the implemented rolefigure functionality. It has parts such as behaviour, capabilities, interfaces, messages, and executing methods. By using an ODP (Open Distributed Processing) semantic framework and the rewriting logic, the structure of the cooperating role-figures and their behaviour is defined.

This model will be used as the basis for a formal model specified in Maude, which is a language and tool supporting specification and analysis of rewriting logic theories. It is used to reason about the structure and the behaviour of the role-figures and the proposed solution for role-figure mobility.

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Robèrt, Markus. "Mobility Management and Climate Change Policies". Doctoral thesis, KTH, Samhällsplanering och miljö, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4539.

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Globally, the transport system faces a paradigmatic shift where, in addition to increased local traffic problems, climate change and depletion of fossil oil reserves will foster a successive transition to renewable fuels and a need for more resource-efficient mobility management and communication alternatives. Foresighted countries, cities or companies taking the lead in adapting to these tougher conditions might well not only solve those problems, but also turn the problems into business advantages. This thesis is based on six studies that attempt to develop future strategies based on rigorous principled emission and energy efficiency targets and to modulate the impact of travel policies, technical components and behaviours in economically advantageous ways. The modelling frameworks developed throughout the thesis build on a target-orientated approach called backcasting, where the following general components are applied: (1) target description at a conceptual level i.e. the potential for sustainable energy systems, emissions, costs, behavioural patterns, preferences, etc.; (2) mapping of the current situation in relation to target description; and (3) modelling of alternative sets of policies, technologies, behaviours and economic prerequisites to arrive at target achievement. Sustainable travel strategies are analysed from two main viewpoints. The first four studies focus on company travel planning, where behavioural modelling proved to be an important tool for deriving targetorientated travel policies consistent with employee preferences. The latter two studies focus on strategies and preconditions to meet future emission targets and energy efficiency requirements at a macroscopic regional level by 2030. Backcasting’s role as a generic methodology for effective strategic planning is discussed.
QC 20100816

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Lattanzi, Fabio. "Mobility management in DVB-RCS networks". Thesis, University of Surrey, 2009. http://epubs.surrey.ac.uk/843648/.

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The undergoing spread of broadband Internet shows that high-speed services are now perceived as a commodity worldwide. Several research programmes have proposed low-cost mobility enhancements to the DVB-RCS standard to intercept the market segment represented by the increasing number of airlines, land-mobile, and maritime passengers. This thesis investigates link and network-layer mobility issues related to a multi-beam network topology with a particular emphasis on backward-compatible protocol modifications minimising the impact over the signalling mechanisms of the original DVB-RCS normative. The availability of GPS equipment onboard collective vehicles and their pattern predictability suggest using position and route information as driving parameters for mobility protocols. Estimations of the terminal residence time within spot-beams are used to prioritise ongoing communications over fresh traffic. Their superiority over distance- based schemes is demonstrated in congested airborne-railroad scenarios, whilst specific solutions are proposed to counteract the sensitivity of the signalling exchange to error modelling. Admission control in wireless networks determines the trade-off between QoS guarantee and resource utilisation. A novel scheme for inbound and outbound traffic estimation is proposed and compared with several existing static and probabilistic approaches. This is proved effective at reducing blocking probabilities without sacrificing much bandwidth in resource reservation. The mathematical characterisation of a threshold-based queuing mechanism for handover traffic is also presented and its accuracy confirmed via simulation results in airborne-railway scenarios. The integration with terrestrial cellular systems is investigated to ensure connectivity in urban centres. A hybrid satellite-terrestrial architecture is envisaged where gap-fillers provide service continuity when intra-satellite mobility cannot be guaranteed. It is proven that the temporary terrestrial diversion of active connections contributes to decrease blocking probabilities and to increase the network utilisation. Because such an approach incurs in roaming costs, an optimisation tool is developed that identifies the conditions under which vertical handover is preferable.

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Robèrt, Markus. "Mobility management and climate change policies /". Stockholm : Arkitektur och samhällsbyggnad, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4539.

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Brännström, Robert. "Mobility management in heterogeneous access networks /". Luleå : Division of Media Technology, Department of Computer Scince and Electrical Engineering, Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1544/2007/57/.

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Ho, Joseph S. M. "Mobility management for personal communications networks". Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14882.

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Ma, Wenchao. "Mobility management for wireless mobile networks". [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001252.

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POLIDORO, ANDREA. "Mobility management in next generation networks". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/1128.

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La definizione che l’ITU-T fornisce delle “Next Generation Network” (NGN) include la possibilità di poter utilizzare differenti tecnologie di accessi a banda larga e di supportare la mobilità. Inoltre le reti NGN hanno la necessità di integrare le diverse tecnologie di accesso alla rete IP in maniera del tutto trasparente. In questa tesi dapprima si definiscono i requisiti che una soluzione per la gestione della mobilità nei sistemi di comunicazione real-time dovrebbe avere. Successivamente si analizzano le soluzioni per la gestione della mobilità presenti in letteratura. A partire da quest’analisi nasce MMUSE (Mobility Management Using Extension) una soluzione per la gestione della mobilità a livello applicativo basata sul protocollo SIP in grado di soddisfare la maggior parte dei requisiti richiesti ad un sistema di gestione della mobilità fra reti eterogenee. Tale soluzione è stata inoltre implementata, per testare sul campo le sue capacità e la sua interoperabilità con diversi terminali e Server SIP. Inoltre, al fine di valutarne le prestazioni è stata effettuata una campagna di misure nel mondo reale utilizzando alcune reti di accesso commerciali (sia 3G che WiFi). Infine, si propone una metodologia per la valutazione delle prestazioni delle differenti soluzioni di gestione della mobilità precedentemente illustrate. Tale metodologia si compone di un semplice modello analitico applicabile sia ad un caso ideale (senza perdite) che un caso reale con un predefinito tasso di perdita dei pacchetti. Il modello è stato applicato a tre soluzioni MMUSE, MIPv4 e SIP re-INVITE.
The ITU-T definition of Next Generation Networks includes the ability to make use of multiple broadband transport technologies and to support generalized mobility. Next Generation Networks will need to integrate several IP-based access technologies in a seamless way. In this Thesis, we first describe the requirements of a Mobility Management scheme for multimedia real-time communication services; then, we report a survey of the Mobility Management schemes proposed in the recent literature to perform vertical handovers between heterogeneous networks. Based on this analysis, we propose an application-layer solution for Mobility Management called MMUSE (Mobility Management Using SIP Extension), which is based on the SIP protocol, and satisfies the most important requirements demanded for a proper implementation of vertical handovers. We also implemented our proposed solution, testing it on the field and proving its overall feasibility and its interoperability with different terminals and SIP servers. In our work we also report measurements results which analyze the performance of the solution in a real world environment, using commercial access networks (WiFi, 3G) Finally we discuss a methodology for performance evaluation of the solutions for vertical handovers previously described. The performance evaluation is based on simple analytical models and covers both the ideal case (no packet loss) and the real case where there is a given packet loss rate. The methodology is applied to a comparison among three solutions, namely MIPv4, classical SIP mobility management using re-INVITE messages and the proposed MMUSE SIP based solution.

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Khan, Mohammad Arifin Rahman. "Mobility management in 5G heterogeneous networks". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2252.

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In recent years, mobile data traffic has increased exponentially as a result of widespread popularity and uptake of portable devices, such as smartphones, tablets and laptops. This growth has placed enormous stress on network service providers who are committed to offering the best quality of service to consumer groups. Consequently, telecommunication engineers are investigating innovative solutions to accommodate the additional load offered by growing numbers of mobile users. The fifth generation (5G) of wireless communication standard is expected to provide numerous innovative solutions to meet the growing demand of consumer groups. Accordingly the ultimate goal is to achieve several key technological milestones including up to 1000 times higher wireless area capacity and a significant cut in power consumption. Massive deployment of small cells is likely to be a key innovation in 5G, which enables frequent frequency reuse and higher data rates. Small cells, however, present a major challenge for nodes moving at vehicular speeds. This is because the smaller coverage areas of small cells result in frequent handover, which leads to lower throughput and longer delay. In this thesis, a new mobility management technique is introduced that reduces the number of handovers in a 5G heterogeneous network. This research also investigates techniques to accommodate low latency applications in nodes moving at vehicular speeds.

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Mahbas, Ali. "Challenges imposed by user's mobility in future HetNet : offloading and mobility management". Thesis, University of Kent, 2017. https://kar.kent.ac.uk/62522/.

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The users' mobility imposes challenges to mobility management and, the offloading process, which hinder the conventional heterogeneous networks (HetNets) in meeting the huge data traffic requirements of the future. In this thesis, a trio-connectivity (TC), which includes a control-plane (C-plane), a user-plane (U-plane) and an indication-plane (I-plane), is proposed to tackle these challenges. Especially, the I-plane is created as an indicator to help the user equipment (UE) identify and discover the small cells in the system prior to offloading her from the overloaded cells e.g. macro cells, to the cells with abundant resources e.g. small cells. In order to show the advantages of the proposed TC structure, a comparison between the TC and the dual-connectivity (DC) is presented in this thesis, in terms of uplink energy efficiency (ULEE) and energy consumption. Furthermore, the complexity of mobility management is addressed in this thesis as the HetNets will have to handle a large number of UEs and their frequent handoffs due to very dense small-footprint small cells. Considering an accurate mobility framework is essential not only to find the potential offloading to the small cells but also to show the mobility impact on the quality of service (QoS). This thesis presents a framework to model and derive the coverage of small cells, the cell sojourn time and the handoff rate in a multi-tier HetNet by taking into account the overlap coverage among the small cells. The results show the effects of a number of parameters, including the density and the transmit power of the small cells and the power control factor, on the system performance. They also show that the TC can outperform the DC in dense HetNets in terms of energy efficiency and energy consumption.

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Jain, Akshay. "Enhanced mobility management mechanisms for 5G networks". Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/669824.

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Many mechanisms that served the legacy networks till now, are being identified as being grossly sub-optimal for 5G networks. The reason being, the increased complexity of the 5G networks compared previous legacy systems. One such class of mechanisms, important for any wireless standard, is the Mobility Management (MM) mechanisms. MM mechanismsensure the seamless connectivity and continuity of service for a user when it moves away from the geographic location where it initially got attached to the network. In this thesis, we firstly present a detailed state of the art on MM mechanisms. Based on the 5G requirements as well as the initial discussions on Beyond 5G networks, we provision a gap analysis for the current technologies/solutions to satisfy the presented requirements. We also define the persistent challenges that exist concerning MM mechanisms for 5G and beyond networks. Based on these challenges, we define the potential solutions and a novel framework for the 5G and beyond MM mechanisms. This framework specifies a set of MM mechanisms at the access, core and the extreme edge network (users/devices) level, that will help to satisfy the requirements for the 5G and beyond MM mechanisms. Following this, we present an on demand MM service concept. Such an on-demand feature provisions the necessary reliability, scalability and flexibility to the MM mechanisms. It's objective is to ensure that appropriate resources and mobility contexts are defined for users who will have heterogeneous mobility profiles, versatile QoS requirements in a multi-RAT network. Next, in this thesis we tackle the problem of core network signaling that occurs during MM in 5G/4G networks. A novel handover signaling mechanism has been developed, which eliminates unnecessary handshakes during the handover preparation phase, while allowing the transition to future softwarized network architectures. We also provide a handover failure aware handover preparation phase signaling process. We then utilize operator data and a realistic network deployment to perform a comparative analysis of the proposed strategy and the 3GPP handover signaling strategy on a network wide deployment scenario. We show the benefits of our strategy in terms of latency of handover process, and the transmission and processing cost incurred. Lastly, a novel user association and resource allocation methodology, namely AURA-5G, has been proposed. AURA-5G addresses scenarios wherein applications with heterogeneous requirements, i.e., enhanced Mobile Broadband (eMBB) and massive Machine Type Communications (mMTC), are present simultaneously. Consequently, a joint optimization process for performing the user association and resource allocation while being cognizant of heterogeneous application requirements, has been performed. We capture the peculiarities of this important mobility management process through the various constraints, such as backhaul requirements, dual connectivity options, available access resources, minimum rate requirements, etc., that we have imposed on a Mixed Integer Linear Program (MILP). The objective function of this established MILP problem is to maximize the total network throughput of the eMBB users, while satisfying the minimum requirements of the mMTC and eMBB users defined in a given scenario. Through numerical evaluations we show that our approach outperforms the baseline user association scenario significantly. Moreover, we have presented a system fairness analysis, as well as a novel fidelity and computational complexity analysis for the same, which express the utility of our methodology given the myriad network scenarios.
Muchos mecanismos que sirvieron en las redes actuales, se están identificando como extremadamente subóptimos para las redes 5G. Esto es debido a la mayor complejidad de las redes 5G. Un tipo de mecanismo importante para cualquier estándar inalámbrico, consiste en el mecanismo de gestión de la movilidad (MM). Los mecanismos MM aseguran la conectividad sin interrupciones y la continuidad del servicio para un usuario cuando éste se aleja de la ubicación geográfica donde inicialmente se conectó a la red. En esta tesis, presentamos, en primer lugar, un estado del arte detallado de los mecanismos MM. Bas ándonos en los requisitos de 5G, así como en las discusiones iniciales sobre las redes Beyond 5G, proporcionamos un análisis de las tecnologías/soluciones actuales para satisfacer los requisitos presentados. También definimos los desafíos persistentes que existen con respecto a los mecanismos MM para redes 5G y Beyond 5G. En base a estos desafíos, definimos las posibles soluciones y un marco novedoso para los mecanismos 5G y Beyond 5G de MM. Este marco especifica un conjunto de mecanismos MM a nivel de red acceso, red del núcleo y extremo de la red (usuarios/dispositivos), que ayudarán a satisfacer los requisitos para los mecanismos MM 5G y posteriores. A continuación, presentamos el concepto de servicio bajo demanda MM. Tal característica proporciona la confiabilidad, escalabilidad y flexibilidad necesarias para los mecanismos MM. Su objetivo es garantizar que se definan los recursos y contextos de movilidad adecuados para los usuarios que tendrán perfiles de movilidad heterogéneos, y requisitos de QoS versátiles en una red multi-RAT. Más adelante, abordamos el problema de la señalización de la red troncal que ocurre durante la gestión de la movilidad en redes 5G/4G. Se ha desarrollado un nuevo mecanismo de señalización de handover, que elimina los intercambios de mensajes innecesarios durante la fase de preparación del handover, al tiempo que permite la transición a futuras arquitecturas de red softwarizada. Utilizamos los datos de operadores y consideramos un despliegue de red realista para realizar un análisis comparativo de la estrategia propuesta y la estrategia de señalización de 3GPP. Mostramos los beneficios de nuestra estrategia en términos de latencia del proceso de handover y los costes de transmisión y procesado. Por último, se ha propuesto una nueva asociación de usuarios y una metodología de asignación de recursos, i.e, AURA-5G. AURA-5G aborda escenarios en los que las aplicaciones con requisitos heterogéneos, i.e., enhanced Mobile Broadband (eMBB) y massive Machine Type Communications (mMTC), están presentes simultáneamente. En consecuencia, se ha llevado a cabo un proceso de optimización conjunta para realizar la asociación de usuarios y la asignación de recursos mientras se tienen en cuenta los requisitos de aplicaciónes heterogéneas. Capturamos las peculiaridades de este importante proceso de gestión de la movilidad a través de las diversas restricciones impuestas, como son los requisitos de backhaul, las opciones de conectividad dual, los recursos de la red de acceso disponibles, los requisitos de velocidad mínima, etc., que hemos introducido en un Mixed Integer Linear Program (MILP). La función objetivo de este problema MILP es maximizar el rendimiento total de la red de los usuarios de eMBB, y a la vez satisfacer los requisitos mínimos de los usuarios de mMTC y eMBB definidos en un escenario dado. A través de evaluaciones numéricas, mostramos que nuestro enfoque supera significativamente el escenario de asociación de usuarios de referencia. Además, hemos presentado un análisis de la justicia del sistema, así como un novedoso análisis de fidelidad y complejidad computacional para el mismo, que expresa la utilidad de nuestra metodología.

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

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

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Morris, Daniel. "Mobility management techniques for cellular overlay networks". Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427818.

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GONDIM, PAULO ROBERTO DE LIRA. "MOBILITY MANAGEMENT IN MOBILE CELLULAR COMMUNICATION NETWORS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8478@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Nos últimos anos, considerável debate tem ocorrido a respeito do tema gerência de mobilidade, face à necessidade de se fazer uso judicioso dos recursos de sinalização destinados para esse fim no âmbito de sistemas de comunicação móvel celular e de sistemas de comunicação pessoal (PCS). Dentre as estratégias de gerência de mobilidade, destaca-se a utilização do conceito de áreas de registro, amplamente empregadas a partir dos sistemas de 2a. geração, e permitindo reduzir o consumo de recursos devido a atualizações de localização. Outro conceito, o de áreas de paging, tem também se tornado bastante difundido, propiciando a economia de recursos gastos na procura de terminais móveis por ocasião de tentativas de completamento de chamadas para estes terminais. Este trabalho inicia-se com discussão a respeito de modelos de mobilidade empregados no estudo de problemas e técnicas da área de comunicações móveis. Dentre tais modelos, destacam- se no contexto do trabalho o modelo baseado em fluxo de fluídos e o modelo gravitacional. O problema de particionamento em áreas de localização (LAPP) é então tratado como um problema de particionamento de grafos, cuja elevada complexidade enseja a utilização de heurísticas capazes de propiciar a obtenção de soluções próximas da ótima. As heurísticas propostas destinam-se ao caso mais comum, em que áreas de localização são coincidentes com áreas de paging. Com base em metodologia utilizada para o LAPP, são propostas soluções para um outro problema, o ISHMP (Inter-Switch Handover Minimization Problem), cuja importância se prende não só ao elevado consumo de recursos mas também aos atrasos impostos pelo sistema aos usuários quando estes trocam de área de Mobile Switching Center. Assim, reduzir ao máximo a ocorrência de tais eventos é vantajoso tanto do ponto de vista do usuário quanto do sistema. As heurísticas propostas são essencialmente as mesmas para ambos os problemas, e mostram superioridade em termos de qualidade das soluções obtidas quando comparadas com propostas de outros autores, através de casos-padrão publicados na literatura e de testbed construído especialmente para a comparação. Apresenta-se ainda discussão a respeito de modelos de mobilidade empregados no estudo de problemas e técnicas da área de comunicações móveis. Dentre tais modelos, destacam- se o modelo baseado em fluxo de fluidos e o modelo gravitacional. O trabalho apresenta também estudo relativo às cargas de sinalização que ocorrem tnato na rede fixa (incluindo o tráfego de consultas e atualizações sobre as bases de dados) quanto na interface aérea. No apêndice, considerando o grafo que modela a rede celular, apresenta-se comprovação formal da conversão de pesos de nós e de arestas em novos pesos de arestas, permitindo o tratamento dos dois problemas de particionamento aqui abordados como problemas de edgepartitioning puros.
In the past few years there hás been considerable debate over the question of mobility management in móbile cellular communication networks, due to the need of using the signaling system resources in a careful way. Among the strategies of location management, the utilization of registration areas has been difunded since the emergence of the second generation mobile communication systems, allowing to reduce the resource consumption due to location updates. Another concept, named paging areas, has also been extensively employed, allowing to save resources utilized localization of mobile terminals during the call setup for mobile stations. Initially, the Location Area Partitioning Problem (LAPP) is treated as a graph partitioning problem, largely recognized as NP-complete ([GARE 79], [LENG 90]) and leading to the utilization of heuristics, able to produce good sub-optimal solutions. The heuristics are proposed to solve the more usual case, where location areas are coincident with paging areas, and the frequency spectrum (radio resources). With the same methodology, another problem, named Inter- Switch Handover Minimization Problem (ISHMP), is adequately solved, being its relevance due to the elevated system resource consumption and to the severe delays imposed to users when their Mobile Switching Centers are changed. Thus, the diminution of the occurrence of such events id advantageous from both the user`s and the system`s points of view. The heuristics are eddentially the same for the two problems, and it is shown the superiority of the quality of the quality of the obtained solutions, when comparing them with other published results. The work also presents discussion about mobility models employed in the study of problems and techniques in the mobile communications area. Among such models, the fluid flow and the gravitational models are highlighted. A study concerning to the signaling load imposed to the fixed network (including queries and location update traffic over databases) and to the air interface is presented. Finally, starting from the average rate of mobile terminated calls and from a previously defined user impatience threshold, a new proposal for the definition of the optimal number of cells per paging area is presented.

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Nguyen-Vuong, Quoc-Thinh. "Mobility management in 4G wireless heterogeneous networks". Thesis, Evry-Val d'Essonne, 2008. http://www.theses.fr/2008EVRY0007/document.

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L’évolution des technologies réseaux sans fils et cellulaires associée au développement des terminaux mobiles est en train d’ouvrir de nouvelles perspectives pour les usagers à savoir un accès universel et ininterrompu au réseau, aux informations et aux services. La capacité à fournir un accès ubiquitaire et une mobilité transparents à travers des réseaux hétérogènes permettra d'enrichir l'expérience des usagers. Néanmoins, la mise en place de cet environnement pose des challenges de recherche extrêmement importants que cette thèse a comme pour objectif d’aborder. Elle présente une ensemble de solutions qui contribuent à l'évolution de la convergence de technologies en améliorant différentes aspects du handover vertical, de la synergie entre technologies cellulaires et sans fils afin que la mobilité sans couture devienne une réalité. La première partie de la thèse examine le rôle de l'utilisateur dans la gestion de la mobilité inter-système. Nous montrons comment les utilisateurs avec leurs terminaux mobiles intelligents peuvent surmonter certains obstacles dans la gestion de handover vertical et améliorer ses performances. Une solution de la mobilité contrôlée par le terminal d'usager a été proposée. Elle consiste en un nouveau mécanisme de sélection de réseaux d'accès avec de nouvelles fonctions d'utilité. Le terminal est en mesure de contrôler ses interfaces radio pour optimiser la consommation d'énergie ainsi que de contrôler l'initiation et la préparation de handover pour assurer des services sans interruption. Une nouvelle méthode de prédiction du handover pour assister à la préparation d’un basculement sans couture est proposée. Dans la deuxième partie de la thèse, il s’agit d’aborder le rôle du contrôle du réseau dans la gestion de la mobilité inter-système. Une solution d'interfonctionnement entre UMTS et WiMAX, qui comprend l'architecture d'intégration, les procédures exactes de handover, la mesure inter-système et le chevauchement nécessaire entre deux cellules avoisinantes pour assurer un handover sans couture est proposée. Pour faciliter l'interfonctionnement et l'itinérance (roaming) entre différents réseaux d’accès indépendamment et sans accords directes entre opérateurs, des plateformes intermédiaires ont été proposées. Finalement, une contribution finale qui consiste à introduire une nouvelle définition de la charge, un nouvel indice de l'équilibrage de charge et un algorithme de répartition de charge qui permettent de définir une solution unifié de gestion de la mobilité dans un contexte de réseaux hétérogènes
In the forthcoming era of seamless mobility, people will have an easy, universal, uninterrupted access to information, entertainment and communication ... when, where and how they want it. The ability to provide a seamless transition across heterogeneous networks will enable a new level of customer experience. This thesis contributes to the evolution of technology convergence by improving different aspects of the vertical handover management to make seamless mobility a reality. In the first part of the thesis, we emphasize on the role of user control in the mobility management. We show how users with their smart mobile terminals can overcome some obstacles in the vertical handover management and improve its performance. We propose a terminal-controlled handover management which is built on the top of a new utility-based access network selection. The terminal is shown to be able to control its radio interface to optimize the power consumption as well as to control the handover initiation or handover preparation to ensure seamless services. We develop a new handover prediction scheme to assist the handover preparation at the application level by the terminal itself. In the second part of the thesis, we consider the role of network control in the inter-system mobility management. We study a UMTS-WiMAX interworking solution including integration architecture, handover procedure, intersystem measurement and required cell overlap for seamless handovers. We also study the interworking and roaming solution across independent access networks using intermediary entities. Last contributions include a new load definition, a new load balancing index and a new algorithm which can hide the heterogeneities of different access technologies from the load balancing

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

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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada
This paper tries to discuss the mobility management when Internet technology is applied along the whole path from spacecraft to ultimate customers in ground. In addition to Mobile IP protocol, micromobility solution is introduced during cross-support. Those competing micromobility solutions in mobile network research area are compared to select one that is most suitable to space network topology characteristics and operation traditions. Other issues are also taken into account, such as deployment and compatibility with Mobile IP when cross-support is not provided. Simulation comparison for hand-off performance with and without micro-mobility solution during cross-support is presented to justify our proposition.

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Vasudeva, Karthik. "Mobility Analysis and Management for Heterogeneous Networks". FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3348.

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The global mobile data traffic has increased tremendously in the last decade due to the technological advancement in smartphones. Their endless usage and bandwidth-intensive applications will saturate current 4G technologies and has motivated the need for concrete research in order to sustain the mounting data traffic demand. In this regard, the network densification has shown to be a promising direction to cope with the capacity demands in future 5G wireless networks. The basic idea is to deploy several low power radio access nodes called small cells closer to the users on the existing large radio foot print of macrocells, and this constitutes a heterogeneous network (HetNet). However, there are many challenges that operators face with the dense HetNet deployment. The mobility management becomes a challenging task due to triggering of frequent handovers when a user moves across the network coverage areas. When there are fewer users associated in certain small cells, this can lead to significant increase in the energy consumption. Intelligently switching them to low energy consumption modes or turning them off without seriously degrading user performance is desirable in order to improve the energy savings in HetNets. This dynamic power level switching in the small cells, however, may cause unnecessary handovers, and it becomes important to ensure energy savings without compromising handover performance. Finally, it is important to evaluate mobility management schemes in real network deployments, in order to find any problems affecting the quality of service (QoS) of the users. The research presented in this dissertation aims to address these challenges. First, to tackle the mobility management issue, we develop a closed form, analytical model to study the handover and ping-pong performance as a function of network parameters in the small cells, and verify its performance using simulations. Secondly, we incorporate fuzzy logic based game-theoretic framework to address and examine the energy efficiency improvements in HetNets. In addition, we design fuzzy inference rules for handover decisions and target base station selection is performed through a fuzzy ranking technique in order to enhance the mobility robustness, while also considering energy/spectral efficiency. Finally, we evaluate the mobility performance by carrying out drive test in an existing 4G long term evolution (LTE) network deployment using software defined radios (SDR). This helps to obtain network quality information in order to find any problems affecting the QoS of the users.

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Santos, Bruno Filipe Silva. "Localized mobility management protocol implementation using PMIPv6". Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7198.

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Mestrado em Engenharia de Electrónica e Telecomunicações
A popularidade dos dispositivos m oveis, a evolu cão das suas funcionalidades e aplica ções que requerem conectividade a Internet sem interrup ções, têm exigido um aumento cont nuo de largura de banda e a convergência de todos os servi cos para redes IP. V arias tecnologias têm vindo a ser desenvolvidas para fazer face a estas exigências, tornando a redes actuais e futuras bastante heterog eneas. O desa o e desenvolver uma solu ção capaz de providenciar mobilidade IP nas redes actuais e de pr oxima gera ção. O Internet Engineering Task Force (IETF) desenvolveu v arios protocolos para mobilidade IP, em que o Mobile IPv4 e o Mobile IPv6 foram os primeiros. No entanto estes protocolos requerem a participa ção do n o m ovel na sinaliza ção do protocolo, e por causa do desempenho da mudan ca de ponto de acesso, foram desenvolvidas v arias extensões. Em particular, o IETF desenvolveu o protocolo Proxy Mobile IPv6, in uenciado pela popularidade das redes locais sem os. Este e baseado em gestão de mobilidade pela rede o que o torna transparente para o n o m ovel. A sinaliza ção tamb em e muito mais simples e a detec ção de movimento e agn ostica a tecnologia. Nesta disserta ção de mestrado e apresentada uma implementa ção de gestão de mobilidade localizada usando Proxy Mobile IPv6 (PMIPv6). A implementa c~ao resultante, conhecida como Open Proxy Mobile IP (OPMIP), foi avaliada numa plataforma de testes com vista a medi ção dos parâmetros de desempenho, permitindo chegar a conclus~oes quanto as vantagens da abordagem seguida. Tamb em e apresentada e analisada uma solu ção que utiliza uma implementa ção do IEEE 802.21, dispon vel em c odigo aberto, para o suporte de detec ção de movimento independente da tecnologia e mobilidade sem interrup c~oes. Os resultados obtidos demonstram a aplicabilidade da solu ção em alternativa as extensões ao PMIPv6 para melhoria do desempenho na mudan ca de ponto de acesso.
The popularity of mobile devices with the ever increase of features and more rich applications requiring Internet connectivity, has led to a continuous increase in bandwidth requirements and a convergence of all services to all-IP networks. Several network access technologies have been developed to face these requirements, making today's and future networks highly heterogeneous. The challenge is to provide a solution to manage and provide IP Mobility in today's and next generation heterogeneous networks. The IETF has developed several protocols to provide IP mobility functionality, with Mobile IPv4 and Mobile IPv6 being the rst ones. But these protocols require a mobile node to participate in the protocol signaling and, due to handover performance concerns, several protocol extensions where developed. In particular, the IETF developed the Proxy Mobile IPv6 (PMIPv6) protocol, in uenced by the popularity of WLAN networks. This protocol is a network managed solution that makes IP mobility transparent to the mobile node. Signaling is also signi cantly simpler and the movement detection technology agnostic and outside of the speci cation. In this Master Thesis an implementation of localized mobility management using PMIPv6 standard is presented. The resulting implementation, dubbed Open Proxy Mobile IPv6 (OPMIP), was evaluated on a testbed and its performance measured, drawing conclusions on the advantages of the approach taken. This thesis also presents a solution that uses an open-source IEEE 802.21 implementation to support media independent movement detection and seamless handover. The results obtained show the applicability of the seamless handover with PMIPv6, an alternative to PMIPv6 protocol extensions to improve handover performance.

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

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

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Nguyen-Vuong, Quoc-Thinh Agoulmine Nazim. "Mobility management in 4G wireless heterogeneous networks". S. l. : Evry-Val d'Essonne, 2008. http://www.biblio.univ-evry.fr/theses/2008/2008EVRY0007.pdf.

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Goyal, Anupam. "Mobility management in global wireless communication networks". Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284056.

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Several issues have become important due to recent developments in communication devices and services, especially with increase in wireless and wireline devices and networking options. These are, congestion in area codes, number portability, need to support intelligent networking, wireless-wireline integration, and demand for new user services. For meeting the requirements needed to overcome the associated problems, new numbering schemes are being proposed. Such schemes would not only relieve the extra burden on conventional geographical area codes due to the addition of vast numbers of wireless units, but also provide additional implementation benefits. Such schemes would also make it possible to associate multiple devices with a person, and multiple persons with a device, while giving people the option to have a single point where they can define who can reach them, at what device, and at what times. The proposed scheme, termed Globally Unique Portable Numbering (GUPN), uses data compression to achieve a format which has the same number of digits as the North American Numbering Plan and offers easy integration into current telephone numbering. An addressing scheme is also proposed for fixed components of communication systems and for reporting current locations of mobile devices. We call this the Globally Unique Fixed Location Numbering (GUFLN) addressing for fixed components. A performance analysis of the proposed scheme is conducted in comparison with existing schemes by considering the following criteria---number congestion with increase in number of persons and devices, amount of data transmitted and stored, and call routing and location update costs. Further studies are conducted using a queuing theory framework for evaluating a variety of possible database architectures with different levels of data replication for implementation of this person-based numbering scheme. Delays in query and update operations are used as the performance metrics for four such representative database architectures. The practical issues arising from implementation considerations are also discussed with possible solutions. This scheme is expected to offer contributions towards Number Portability (NP), Wireless Intelligent Networks (WIN), and wireless-wireline integration.

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Bouallegue, Seifeddine. "Mobility and Security Management in Femtocell Networks". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066084/document.

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Les réseaux de télécommunications sont soumis à des processus d'amélioration et d'optimisation continue. Chaque nouvelle itération apporte son lot de défis et limites. En effet, la croissance exponentielle des appareils de télécommunication, des stations de base aux équipements utilisateurs conduisent à de sérieux problèmes d'economie d'énergie. En plus des menaces à la vie privée, en particulier pour les réseaux sans fil car les canaux utilisés par les opérateurs peuvent également être utilisés par une oreille indiscrète quelconque. L'optimisation de l'utilisation du spectre est également un défi en raison du fait que le spectre disponible dans les systèmes de communication sans fil est devenu une ressource très rare en raison de la demande croissante. Les réseaux émergents, tels que les femtocells, souffrent également des défis mentionnés précédemment. Le travail de thèse actuel se concentre sur la proposition de solutions aux défis cités précédemment: l'efficacité énergétique, le partage du spectre et la sécurité. Le travail de recherche présenté dans cette thèse a porté sur trois axes principaux: Premièrement, trouver un moyen de réduire au minimum la consommation d'énergie des femtocellules dans les reseaux BWA femto/macro-cellulaire en diminuant le nombre d'événements de mobilité non désirées et l'introduction de nouveaux états de puissance pour la femtocellule. En second lieu, proposer une solution qui vise à réduire le temps de transmission prévu dans le temps de séjour de l'utilisateur secondaire (SU) dans la couverture d'une femtocellule en utilisant un algorithme basé sur le temps minimum prévu de transmission dans le temps de séjour de l'équipement utilisateur (UE). Enfin, introduire un nouveau modèle qui basé sur la sélection du meilleur relais qui maximise le taux de confidentialité et les avantages de l'augmentation du nombre de relais sous la contrainte de qualité de service à la destination
Telecommunications networks are subject to continuous improvement and enhancement processes. Every new iteration brings its set of challenges and limitations. In fact, the exponential growth in telecommunication devices, from base stations to user equipments lead to serious energy efficiency issues. Along with the privacy threats, especially for wireless networks as the channels used by operators can also be used by any eavesdropper. Spectrum usage optimization is also a challenge due to the fact that the available spectrum in wireless communications systems has been a very rare resource because of the increasing demand. Emerging networks, such as femtocells, suffer also from the previously mentioned challenges. The current thesis work focuses on proposing several solutions to the previously cited challenges: energy efficiency, spectrum sharing and security. The research work introduced in this thesis has focused on three main axes: First, find a way to minimize the energy consumption of femtocells in macro/femto-cellular BWA networks by decreasing the number of unwanted mobility events and introducing new power states for the femtocell device. Second, propose a solution that aims to reduce the expected transmission time within the dwell time of Secondary User (SU) in the coverage of a femtocell using an algorithm based on the minimum expected transmission time within the dwell time of the User Equipment (UE) in the coverage of the femtocell. Finally, introduce a new scheme that is based on best relay selection method that maximizes the secrecy rate and benefits from increasing the number of relays under QoS constraint at the destination

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Bouallegue, Seifeddine. "Mobility and Security Management in Femtocell Networks". Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066084.pdf.

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Les réseaux de télécommunications sont soumis à des processus d'amélioration et d'optimisation continue. Chaque nouvelle itération apporte son lot de défis et limites. En effet, la croissance exponentielle des appareils de télécommunication, des stations de base aux équipements utilisateurs conduisent à de sérieux problèmes d'economie d'énergie. En plus des menaces à la vie privée, en particulier pour les réseaux sans fil car les canaux utilisés par les opérateurs peuvent également être utilisés par une oreille indiscrète quelconque. L'optimisation de l'utilisation du spectre est également un défi en raison du fait que le spectre disponible dans les systèmes de communication sans fil est devenu une ressource très rare en raison de la demande croissante. Les réseaux émergents, tels que les femtocells, souffrent également des défis mentionnés précédemment. Le travail de thèse actuel se concentre sur la proposition de solutions aux défis cités précédemment: l'efficacité énergétique, le partage du spectre et la sécurité. Le travail de recherche présenté dans cette thèse a porté sur trois axes principaux: Premièrement, trouver un moyen de réduire au minimum la consommation d'énergie des femtocellules dans les reseaux BWA femto/macro-cellulaire en diminuant le nombre d'événements de mobilité non désirées et l'introduction de nouveaux états de puissance pour la femtocellule. En second lieu, proposer une solution qui vise à réduire le temps de transmission prévu dans le temps de séjour de l'utilisateur secondaire (SU) dans la couverture d'une femtocellule en utilisant un algorithme basé sur le temps minimum prévu de transmission dans le temps de séjour de l'équipement utilisateur (UE). Enfin, introduire un nouveau modèle qui basé sur la sélection du meilleur relais qui maximise le taux de confidentialité et les avantages de l'augmentation du nombre de relais sous la contrainte de qualité de service à la destination
Telecommunications networks are subject to continuous improvement and enhancement processes. Every new iteration brings its set of challenges and limitations. In fact, the exponential growth in telecommunication devices, from base stations to user equipments lead to serious energy efficiency issues. Along with the privacy threats, especially for wireless networks as the channels used by operators can also be used by any eavesdropper. Spectrum usage optimization is also a challenge due to the fact that the available spectrum in wireless communications systems has been a very rare resource because of the increasing demand. Emerging networks, such as femtocells, suffer also from the previously mentioned challenges. The current thesis work focuses on proposing several solutions to the previously cited challenges: energy efficiency, spectrum sharing and security. The research work introduced in this thesis has focused on three main axes: First, find a way to minimize the energy consumption of femtocells in macro/femto-cellular BWA networks by decreasing the number of unwanted mobility events and introducing new power states for the femtocell device. Second, propose a solution that aims to reduce the expected transmission time within the dwell time of Secondary User (SU) in the coverage of a femtocell using an algorithm based on the minimum expected transmission time within the dwell time of the User Equipment (UE) in the coverage of the femtocell. Finally, introduce a new scheme that is based on best relay selection method that maximizes the secrecy rate and benefits from increasing the number of relays under QoS constraint at the destination

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Ahlfridh, Emmy, i Anna Tiljander. "Mobilitetshus för ett hållbart resande : En studie om bäst praktik angående mobilitetshus". Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-44314.

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Sammanfattning Mobilitetsplaneringen har växt fram från globala trender som stärks av urbaniseringen, den tekniska utvecklingen och nya mobilitetsbehov. Mobilitetsplaneringen framför nya krav gällande sociala, ekonomiska och hållbara aspekter och är i behov av nya mobilitetslösningar. Bäst praktik, används inom internationella och nationella nätverk, för att dela nya lösningar, processer och innovationer. En mobilitetslösning som delas genom kunskapsdelningsmetoden bäst praktik, är det nya fenomenet mobilitetshus. Idag saknas en gemensam definition av mobilitetshus, vilket skapar oklarhet för mobilitetsplaneringen. Syftet med studien är att undersöka fenomenet mobilitetshus; dels vilken funktion ett mobilitetshus är tänkt att fylla och vilka transportbehov det är tänkt att adressera och dels att undersöka planeringen av bäst praktik angående mobilitetshus i Sverige. Studien undersöker exempel på befintliga och planerade mobilitetshus i Sverige. Studiens valda metoder grundas av befintlig teori och metodologi gällande bäst praktik. Kunskapsdelningen av bäst praktik kommer att förstås som en diskursiv process. Metoderna har ett förhållningssätt till befintlig data som innefattar Sveriges planering av det nya fenomenet mobilitetshus. Genom dokumentstudie, litteraturstudie och platsbesök, samlas en omfattande data för bäst praktik angående mobilitetshus i Sverige. Studiens resultat för de empiriska frågeställningarna delger att det finns en otydlighet av mobilitetshus definition och innehåll. Studien konstaterar att det saknas uppföljningsdokument, som redogör mobilitetshusens inverkan, resultat och funktion i staden. Studien rekommenderar att planeringen med bäst praktik angående mobilitetshus skulle kunna underlättas, genom att skapagemensamma förståelser av vad för “problem” mobilitetshus ska förväntas lösa i staden. I studien framkommer även att bäst praktik som kunskapsdelningsmetod, bidrar till en läroprocess. Lärprocessen tydliggörs vid undersökningen av befintliga och planerade mobilitetshus i Sverige.

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

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

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

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Chen, Yingying, i 陳穎穎. "Micro-mobility management for next-generation wireless network". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29148212.

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Liu, Liang Qui. "Dynamic anticipatory mobility management for personal communication networks". Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284844.

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Kiss, Zoltan. "Predictive Mobility Management for future mobile telecommunication networks". Thesis, De Montfort University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391858.

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Sivagnanasundaram, Suthaharan. "GSM mobility management using an intelligent network platform". Thesis, Queen Mary, University of London, 1997. http://qmro.qmul.ac.uk/xmlui/handle/123456789/3820.

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BAPTISTA, GUSTAVO LUIZ BASTOS. "MOBILITY MANAGEMENT AND DISCONNECTION HANDLING BASED ON SIP". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14109@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Os avanços nas tecnologias de redes de computadores, telecomunicações, e dispositivos móveis portáteis têm gerado uma demanda por aplicações e serviços que sejam apropriados para ambientes com conectividade intermitente e mobilidade dos dispositivos. Uma questão central para a viabilização de tais aplicações em ambientes como estes são as possíveis soluções para o Gerenciamento de Mobilidade, isto é, a manutenção automática da conectividade entre componentes de um sistema em cenários nos quais os dispositivos mudam de endereço IP dinamicamente, à medida que se reconectam a diferentes domínios de rede. Partindo de uma investigação inicial das principais soluções existentes, este trabalho apresenta a implementação de uma solução na camada de aplicação baseada no protocolo SIP. Em seguida, apresenta a adaptação de um sistema publish/subscribe existente para fazer com que o mesmo utilize a solução implementada, com o objetivo de prover suporte à mobilidade e à desconexão dos produtores e consumidores de eventos, bem como para a travessia de firewalls e NATs, permitindo que o sistema publish/subscribe possa ser usado na Internet, e não somente em redes locais. O modelo publish/subscribe foi escolhido como estudo de caso, pois oferece interações assíncronas e anônimas que se adéquam muito bem aos requisitos de um cenário de mobilidade. A adaptação deste sistema partiu da investigação de alguns dos principais requisitos que um sistema pub/sub deve atender para tratar mobilidade e desconexão de dispositivos. O referido sistema foi testado para diferentes cenários, e seu desempenho foi avaliado para diferentes configurações, e comparado ao do sistema publish/subscribe convencional.
Advances in computer networks, telecommunications, and portable mobile devices have increased the demand for applications and services that are suitable for environments with intermittent connectivity and mobility of devices. A central question for the viability of such applications on environments like these are the possible solutions for Mobility Management, i.e., the automatic maintenance of the connectivity between system components in scenarios where the devices change their IP addresses dynamically as they reconnect to different network domains. Starting from an initial investigation of the main solutions for Mobility Management, this dissertation presents the development of a solution on the application layer based on the SIP protocol. Then, it presents the adaptation of an existing publish/subscribe system to make it use the developed Mobility Management solution, in order to provide support for the mobility and disconnection of event producers and consumers, and also NAT and firewall traversal, enabling the system to be used on the Internet, and not only on local networks. The publish/subscribe model has been chosen as a case study for the implemented solution, because it provides asynchronous and anonymous interactions that are very well suited to the requirements of a mobility scenario. The adaptation of the publish/subscribe system started from an investigation of the main requirements a system like this should meet in order to support mobility and disconnection of devices. The referred system has been tested for different scenarios, and its performance has been evaluated for different configurations, and it has been compared to the conventional publish/subscribe system.

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Nevala, Christian. "Mobility management for software defined wireless sensor networks". Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-31936.

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By advancing technologies in both hardware and software, it is possible to support more complex applications. Wireless Sensor Networks (WSNs) comprised of tiny sensing devices with wireless radios are the key enablers for future Internet of Things(IoT) applications, where collecting measurements and delivering them to their destination is the most important task. In traditional sensor networks, sensor nodes were typically stationary and each node periodically measured and sent data to the next predefined router. However, in current applications, some nodes are expected to move. For instance, in health monitoring applications, where patients with sensors attached to their body are free to move in the hospital or their houses. Software Defined Networking (SDN) is a technique that was conventionally used in wired networks, and recently was used in some wireless networks, such as cellular and wireless local area networks. The idea of SDN is to provide more flexibility in the network by getting the advantage of re-programmability of the network devices during run-time. In networks based on SDN, the control plane is shifted from the infrastructure to a higher level in order to provide re-configuration. The controller decides on updating forwarding rules by getting some feedback from nodes in the network. In wireless sensor networks, the feedback may contain information related to the link quality and available resources such as battery level and the location of the sensor node (number of hops away from the sink). In this thesis, a study ofseveral relevant SDN-based architectures for wireless sensor networks is given, outlining the main advantages and disadvantages for each. In addition, some mobility solutions in sensor networks such as localization, routing and hand-off algorithms are explored. One of the drawbacks with SDN is that it was originally built for wired networks there experience with mobility does not exist. Thus the thesis considers the possibility to use SDN solutions in WSN were certain applications are in need of mobility. Finally, the thesis propose mobility solution for sensor networks that takes advantage of SDN and uses a handoff algorithm. In fact, the hand-off mechanism is achieved by means of control message exchanges that is supervised by the controller.

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Niri, Shahram Ghaheri. "Advanced mobility management techniques for hierarchical cell structure". Thesis, University of Surrey, 1999. http://epubs.surrey.ac.uk/844101/.

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Increasing demand for global wireless mobile communication services has motivated extensive research and development activities surging the way towards the 3rd generation personal communication systems, focusing in particular- on flexible control mechanisms and efficient mobility management. The Hierarchical Cell Structure (HCS)/multi layer cell architecture represents one of the most efficient techniques used in the radio environment to extend the coverage and provide greater capacity. It also offers flexibility to operators to tailor-fit capacity to match traffic demands in a growing market. However, the performance of such a system is influenced by many factors, dictating additional challenges in system design. This thesis focuses on enhanced mobility management, control mechanism, and relevant issues in a hierarchical cell structure in 3rd generation mobile communication system. The network integration issue in a multi-layer cell architecture, when each layer exploits different radio and network technologies, is thoroughly investigated. Various integration solutions are proposed. Within the selected scenario, location management, call routing, cell selection and handover are investigated and improved signalling message sequences are identified. New mobility management mechanisms leading to significant reduction of the signalling traffic in the integrated system are proposed. The handover issues in a two-layer cell architecture are also studied. New inter-system handover algorithms are proposed and their performances are analysed via both mathematical and simulation models. Novel methods are also proposed to optimise the inter-system handover performance in terms of reduction of unnecessary handover probability and mean number of handovers. The handover control mechanism and handover time, are thoroughly investigated and suitable control methods are suggested for such a system. The signalling load issue is examined and the performance of the proposed techniques is evaluated. Finally, the Grade of Service (GoS) issue is thoroughly investigated. The performance of the various overflow policies are examined through an analytical model and an optimum policy is recommended. The impacts of the proposed handover algorithms on the GoS are evaluated. A new methodology is also proposed to estimate the optimum channel allocation ratio between layers providing a uniform GoS between layers.

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

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

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Azevedo, João Pedro Coelho de. "Wireless distributed mobility management on a road scenario". Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14936.

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Mestrado em Engenharia Eletrónica e Telecomunicações
In today's world, connectivity is an important requirement for the population. People want and, in a broad range of cases, need to be connected with each other and with the world. To share a video, attend an e-meeting or just keep in touch with friends and family, Internet is truly part of our everyday life. However, this massive growth of the connected world presented a lot of challenges to the engineering task-forces and research teams in computer networks. One of these challenges is mobility. The network mobility theme is not a recent matter in the networking world since people want to reach the Internet everywhere and still be able to do it like when at home. Several solutions have been presented and applied over the years; however, with the expansion of vehicular networks, new solutions must be presented in order to ful ll the requirements of such networks. In this work a study on the available mobility management solutions is performed. The studied mobility management solutions include both centralized and distributed solutions; however, the focus of the work presented is in the distributed category. In this context an implementation for a new distributed mobility management protocol, DMIPA, suitable to be used in a vehicular environment is presented. This new protocol aims to deliver mobility management in a distributed way, avoiding the disadvantages of centralized solutions, even in networks that do not provide any support for mobility without any hardware or network changes. Moreover, the protocol was tested in laboratory and on the road in order to acquire real data about the performance and behaviour of the implementation. These tests were based on the access technologies IEEE 802.11g, commonly used in WiFi access points, and IEEE 802.11p, a technology tailored for vehicular networks.
Actualmente, a conectividade ubíqua é uma necessidade importante para a generalidade da população. As pessoas querem e, em muitos casos, têm a necessidade de estar ligadas entre si e com o mundo. Para partilhar um vídeo, participar numa reunião online ou apenas para manter contacto com os amigos e familiares, a Internet faz verdadeiramente parte do nosso dia-a-dia. No entanto, este crescimento maciço do mundo online apresentou uma série de desafios às equipas de engenharia e investigação em redes de computadores. Um desses desafios é a mobilidade. O tema da mobilidade na rede não é uma questão recente, uma vez que as pessoas desejam aceder à Internet em todos os lugares e querem poder fazê-lo como se estivessem em casa. Várias soluções foram apresentadas e aplicadas ao longo dos anos; no entanto, com a expansão das redes veiculares, novas soluções são necessárias de modo a cumprir os requisitos de tais redes. Neste trabalho foi realizado um estudo sobre as soluções de gestão de mobilidade disponíveis. As soluções de gestão de mobilidade estudadas incluem soluções centralizadas e distribuídas; no entanto, o foco do trabalho apresentado está nas soluções distribuídas. Neste contexto, é apresentada uma implementação de um novo protocolo de gestão distribuída de mobilidade, DMIPA, adequado para ser utilizado num ambiente veicular. Este novo protocolo pretende aplicar a gestão da mobilidade de forma distribuída pelos vários nós da rede, evitando as desvantagens de soluções centralizadas, mesmo em redes que não oferecem qualquer apoio à mobilidade, sem quaisquer mudanças de hardware ou de rede. Além disso, o protocolo foi testado em laboratório e na estrada, a fim de obter dados reais sobre o seu desempenho e comportamento. Este teste foi realizado utilizando as tecnologias de acesso IEEE 802.11g, utilizado em pontos de acesso Wi-Fi, e IEEE 802.11p, uma tecnologia desenvolvida em especial para redes veiculares.

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Saleem, Muhammad Shoaib. "Mobility management for the information centric future internet". Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00790419.

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The contemporary Internet ecosystem today has gone through series of evolutionary changes during the last forty or fifty years. Though it was designed as a network with fixed nodes, it has scaled well enough with the development of new technologies both in fixed and wireless networks. Initially, the communication model of the Internet was based on the telephone network (and can be considered as the 1st Generation Internet). Later, its transition as a client-server model made it a network where communication systems exchange data over dedicated links. This 2nd Generation Internet, over the years, has been challenged by many problems and issues such as network congestion, path failure, DOS attacks, mobility issues for wireless networks, etc. The Internet users always look for some information, irrespectively where it is located or stored. This approach is the basic building block for a network architecture where information is considered as the premier entity. Such networks, in general, are termed as Information Centric Network (ICN), where information takes centric position superseding the node centric approach like in the current Internet. The problems faced by the current Internet architecture, mentioned above, can be handled with a unifying approach by putting the information at the centre of the network architecture. On a global scale, this network architecture design is termed as the Future Information Centric Internet. Similarly, Mobile Internet usage has increased overwhelmingly in the last decade. There has been an estimated 1.2 billion mobile broad-band subscriptions for 2.4 billion Internet users in 2011. Because of the increased spectrum efficiency and ubiquitous availability of cellular connectivity, the seamless mobility and connectivity is now considered as daily life commodity. However, in the case of the Internet, IP based mobility solutions cannot catch up in performance with the fast evolution of cellular networks. Therefore, one of the primary goals for the Future Internet is the design of mobility management schemes that overcome the issues in wireless networks such as handover and location management, multihoming, security, etc. In this thesis, we have proposed a mobility management solution in wireless networks in the context of ICN in general and in the context of Network of Information (NetInf) in particular. NetInf is ICN-based Future Internet architecture. We propose a NetInf Mobile Node (NetInf MN) architecture which is backward compatible with the current Internet architecture as well. This cross architecture design for mobility support works closely with Central Control Unit (CCU) (network entity) for improved performance in case of handover management in wireless networks. The Virtual Node Layer (VNL) algorithm explains how different modules of NetInf MN and CCU units work together. The game theoretical and Reinforcement Learning (CODIPAS-RL) scheme based mathematical model shows how handover management and data relaying in the wireless networks can increase the network coverage through cooperative diversity. Simulation results show that the proposed model achieves both Nash and Stackelberg equilibria where as the selected CODIPAS-RL scheme reaches global optimum. Finally, as a use case example of NetInf architecture, we propose the NetInf Email service that does not require dedicated servers or dedicated port unlike the current email service. The use of asymmetric keys as user's ID is the unique feature proposed for this service. The NetInf email service architecture framework presented, explains how different architectural components work together. We discuss different challenges and requirements related to this service. The prototype developed for the Network of Information will be used for the implementation of this service

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Saleem, Muhammad Shoaib. "Mobility management for the information centric future internet". Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0035.

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L'Internet d'aujourd'hui a traversé série de changements évolutionnaires dans les quarante ou cinquante dernières années. Il a été conçu pour un réseau avec des nœuds fixes. Au début, le modèle de communication de l'Internet a été basé sur le réseau téléphonique (considéré comme 1er Génération Internet). Plus tard, il a été mis à jour comme un modèle client-serveur où la communication des systèmes d'échanger des données sur des liaisons dédiées. Cette 2ème génération Internet, au cours des années, a été contestée par de nombreux problèmes tels que la congestion du réseau, panne de chemin, les attaques DOS, gestion de la mobilité pour les réseaux sans fil, etc. Les utilisateurs d'Internet recherchent toujours des informations, indépendamment de la localisation (nœud ou serveur) où il se trouve ou stockées. Cette approche est la base d'une architecture où l'information est considérée comme l'unité primaire. Ces réseaux, en général, sont appelés en tant que Network of Information (NetInf), où l'information prend une position centrée remplaçant l'approche centrée sur nœud comme dans l'Internet aujourd'hui. Les problèmes rencontrés par l'Internet aujourd’hui, mentionné ci-dessus, peuvent être traitées avec une approche unificatrice en mettant l'information au centre de l'architecture du réseau. À l'échelle mondiale, cette conception de l'architecture réseau est nommée « Future Information Centric Internet ». En parallèle, l'utilisation de l'Internet mobile a été augmentée durant la dernière décennie. Il a été environ 1,2 milliard abonnements de mobile broad band pour 2,4 milliards d’utilisateurs d'Internet en 2011. En raison d’augmentation de l'efficacité spectrale et ubiquitaire disponibilité de la connectivité cellulaire, la mobilité et la connectivité transparente est désormais considérée comme des produits de base la vie quotidienne. Néanmoins, en cas d'Internet, les solutions de mobilité basées sur IP ne peuvent pas rattraper son retard dans la performance avec l'évolution rapide des réseaux cellulaires. Par conséquent, l'un des principaux objectifs pour l'internet du futur est de concevoir des systèmes de gestion de mobilité qui permettent de surmonter les problèmes dans les réseaux sans fil tels que handover et la gestion de la localisation, multihoming, sécurité, etc. Dans cette thèse, nous avons proposé une solution de gestion de mobilité dans les réseaux sans fil dans le cadre du Information Centric Networking (ICN) en général et dans le contexte ne NetInf en particulier. NetInf est une architecture du Futur Internet basée sur le concept du ICN. Nous proposons un nœud mobile qui s’appelle NetInf Mobile Node (NetInf MN). L'architecture de ce nœud est compatible avec l'architecture d'Internet basée sur TCP/TP. Cette conception de l'architecture travaille en collaboration avec Central Control Unit (CCU) pour améliorer les performances en cas de handover dans les réseaux sans fil. La Virtual Node Layer (VNL) algorithme explique comment les différents modules de NetInf MN et des unités CCU travaillé ensemble. La modèle mathématique basé sur Théorie de Jeu et Renforcement Learning (CODIPAS-RL) montre comment handover et data relaying sont géré dans les réseaux sans fil. Les résultats des simulations montrent que le modèle proposé réalise à la fois de Nash et de Stackelberg équilibres alors que le CODIPAS-RL régime atteint un optimum global. Enfin, comme un exemple de cas d'utilisation de l'architecture NetInf, nous proposons le NetInf Email Service qui ne requiert pas des serveurs et ports dédiés contrairement au service e-mail existante. L'utilisation de clés asymétriques comme l'ID de l'utilisateur est la caractéristique unique proposée pour ce service. Le NetInf Email service architecture présenté, explique comment différents éléments architecturaux travail ensemble. Nous discuter des défis différents et des besoins relatifs à ce service. Le prototype développé pour NetInf sera utilisée pour la mise en œuvre de ce service
The contemporary Internet ecosystem today has gone through series of evolutionary changes during the last forty or fifty years. Though it was designed as a network with fixed nodes, it has scaled well enough with the development of new technologies both in fixed and wireless networks. Initially, the communication model of the Internet was based on the telephone network (and can be considered as the 1st Generation Internet). Later, its transition as a client-server model made it a network where communication systems exchange data over dedicated links. This 2nd Generation Internet, over the years, has been challenged by many problems and issues such as network congestion, path failure, DOS attacks, mobility issues for wireless networks, etc. The Internet users always look for some information, irrespectively where it is located or stored. This approach is the basic building block for a network architecture where information is considered as the premier entity. Such networks, in general, are termed as Information Centric Network (ICN), where information takes centric position superseding the node centric approach like in the current Internet. The problems faced by the current Internet architecture, mentioned above, can be handled with a unifying approach by putting the information at the centre of the network architecture. On a global scale, this network architecture design is termed as the Future Information Centric Internet. Similarly, Mobile Internet usage has increased overwhelmingly in the last decade. There has been an estimated 1.2 billion mobile broad-band subscriptions for 2.4 billion Internet users in 2011. Because of the increased spectrum efficiency and ubiquitous availability of cellular connectivity, the seamless mobility and connectivity is now considered as daily life commodity. However, in the case of the Internet, IP based mobility solutions cannot catch up in performance with the fast evolution of cellular networks. Therefore, one of the primary goals for the Future Internet is the design of mobility management schemes that overcome the issues in wireless networks such as handover and location management, multihoming, security, etc. In this thesis, we have proposed a mobility management solution in wireless networks in the context of ICN in general and in the context of Network of Information (NetInf) in particular. NetInf is ICN-based Future Internet architecture. We propose a NetInf Mobile Node (NetInf MN) architecture which is backward compatible with the current Internet architecture as well. This cross architecture design for mobility support works closely with Central Control Unit (CCU) (network entity) for improved performance in case of handover management in wireless networks. The Virtual Node Layer (VNL) algorithm explains how different modules of NetInf MN and CCU units work together. The game theoretical and Reinforcement Learning (CODIPAS-RL) scheme based mathematical model shows how handover management and data relaying in the wireless networks can increase the network coverage through cooperative diversity. Simulation results show that the proposed model achieves both Nash and Stackelberg equilibria where as the selected CODIPAS-RL scheme reaches global optimum. Finally, as a use case example of NetInf architecture, we propose the NetInf Email service that does not require dedicated servers or dedicated port unlike the current email service. The use of asymmetric keys as user's ID is the unique feature proposed for this service. The NetInf email service architecture framework presented, explains how different architectural components work together. We discuss different challenges and requirements related to this service. The prototype developed for the Network of Information will be used for the implementation of this service

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Berzin, Oleg Daryoush Afshin Samimi. "Mobility management architecture and modeling for label switched networks (mobility label based network) a thesis /". Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3217.

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Houyou, Amine Mohamed. "Context-aware mobility : a distributed approach to context management /". kostenfrei, 2009. http://www.opus-bayern.de/uni-passau/volltexte/2010/1797/.

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Liu, Xiaoshan. "Mobility and radio resource management in heterogeneous wireless networks". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38233873.

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Stevens-Navarro, Enrique. "Mobility management and admission control in heterogeneous wireless networks". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5624.

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The forthcoming fourth generation (4G) heterogeneous wireless networks are a mixture of overlapped networks using different wireless access technologies and addressing different needs from the users. Due to mobility, the users are able to switch connections among networks and hence to perform the so-called horizontal and vertical handoffs. The present thesis makes contributions to the field of mobility management with focus on handoff management and connection admission control in heterogeneous wireless networks. Two different integrated heterogeneous systems are investigated: 1) the interworking of cellular networks with wireless local area networks (WLANs) based on the I E E E 802.11 standard; 2) the interworking of cellular networks with wireless metropohtan area networks based on the I E E E 802.16e standard. To this end, first we develop a novel vertical handoff decision algorithm by modeling the vertical handoff problem as a Markov decision process. Our model considers the important tradeoff among the quality of service (QoS) of the connection and the signaling cost of performing a vertical handoff. We also take the connection duration into consideration for the handoff decision. Second, we propose an analytical model for admission control in c e l l u l a r / W L A N interworking and investigate the combination of different admission control policies. Our model considers mobihty of users, capacity and coverage of each network, admission policies, and QoS in terms of blocking and dropping probabilities. We introduce the concept of policy functions to model the admission control policies and formulate two different revenue maximization problems. T h i r d , we extend the virtual partitioning technique w i t h preemption for admission control in cellular/802.16e interworking. We propose admission control algorithms for each type of connection request. We also describe the expected mobility scenario in such integrated system. Finally, to achieve joint design at the connection-level and packet-level, a joint QoS optimization approach is used.

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Uzunalioğlu, Hüseyin. "Mobility management for Low Earth Orbit (LEO) satellite networks". Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13703.

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Zafar, Fareeha. "Global mobility management with route optimization in cellular networks". Thesis, University of Derby, 2009. http://hdl.handle.net/10545/302808.

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

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

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Liu, Xiaoshan, i 劉曉杉. "Mobility and radio resource management in heterogeneous wireless networks". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38233873.

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Meenan, Christopher. "Advanced mobility management techniques for satellite mobile communication networks". Thesis, University of Surrey, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388995.

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