Dissertations / Theses on the topic 'Mobile services'
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Bhatti, Atif, and Imran Aslam Choudhary. "Service Discovery for Future Mobile Services." Thesis, Norwegian University of Science and Technology, Department of Telematics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10900.
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The pervasive computing environment for heterogeneous network is on a continuous rise. The ability to interact and control network devices with different functionalities within office and home environment could be very beneficial to a lot of users. The service discovery in computers and mobile devices enabled them to interact with one another through wireless and heterogeneous wired networks. Services advertise their existence in a dynamic way and devices are designed with this capability to discover these services and its properties automatically. These devices are though based on different technologies but are still able to communicate and discover one another based on existing service discovery architectures. It is notable that a significant number of networked devices are now mobile and these mobile devices make service discovery more challenging.In future mobile multi-domain multi-language environments, a service can be anything and introduced by anybody. Consequently, same or equivalent services may have different names and services with same name or type may be completely different. Existing service discovery systems are incapable of handling these situations. We have implemented a service discovery system which supports semantics to service descriptions. It allows any user to act as a service provider and introduce any service at any time. The service provider can define any service as equivalent to any existing service and in any language as wanted. In addition, it is capable to find services that are not exact matches of the requested ones. More semantics are introduced through attributes like EquivalenceClass, ParentType and Keywords. The test conducted on this system in real time proves that the system is efficient and can be applied in real life.
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Jansson, Erik. "Mobile portal services." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97821.
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The master thesis is examining the possibilities to integrate a mobile unit in a portal service built on a service oriented architecture. A portal is an overall solution for the need of public web, intranet and extranet of an enterprise. The thesis starts off by identifying interesting business concepts for mobile units. Then a specific concept is chosen to be implemented as a smart client solution. On the way to the final prototype application areas such as occasionally connected clients, different technologies for the communication between the server and the client, and to a certain degree security issues are covered. The Microsoft .NET is used as developing environment with C# as the chosen programming language. Specifically for the programming of the mobile unit, a hybrid of a PDA and a mobile phone, Microsoft .NET Compact Framework is used. The thesis is the final examination of the Master of Science Program in Media Technology at Linköping University. The idea for the thesis was an initiative from Ibitec AB. The majority of the work was done during the fall of 2004 at their office.Examensarbetet undersöker möjligheten till att integrera mobila enheter i en portallösning som bygger på en tjänstebaserad arkitektur. En portal är en helhetslösning för att tillfredställa företags behov av publik webb, intranät och extranät. Arbetet börjar med att identifiera intressanta tjänstekoncept för mobila enheter, innan ett specifikt koncept väljs ut för att sedan implementeras som en smart klientlösning. På vägen fram till den slutliga prototypen avhandlas områden som tillfälligt uppkopplade klienter, olika tekniker för kommunikation mellan server och mobil enhet och till viss mån datasäkerhet. All implementering sker under Microsoft .NET med C# som programmeringsspråk. Specifikt för programmeringen av handenheten, som är en hybrid mellan en PDA och en mobiltelefon, har .NET Compact Framework använts Arbetet är det slutgiltiga examinationsmomentet på utbildningen till Civilingenjör inom Medieteknik på Linköping Universitet. Merparten av projektet utfördes under hösten 2004 på plats hos uppdragsgivaren Ibitec AB.
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Houacine, Fatiha. "Service-Oriented Architecture for the Mobile Cloud Computing." Thesis, Paris, CNAM, 2016. http://www.theses.fr/2016CNAM1110/document.
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La croissance des appareils connectés, principalement due au grand nombre de déploiements de l'internet des objets et à l'émergence des services de cloud mobile, introduit de nouveaux défis pour la conception d'architectures de services dans le Cloud Computing Mobile (CCM) du cloud computing mobile. Nous montrons dans cette thèse comment l'architecture orientée services SOA peut être une solution clé pour fournir des services cloud mobiles distribués et comment la plate-forme OSGi peut être un cadre adaptatif et efficace pour fournir une telle implémentation. Nous adaptons le cadre CCM proposé à différents contextes d'architecture. Le premier est un modèle centré traditionnel, où les appareils mobiles sont réduits à consommer des services. Le second est un modèle distribué où la puissance de l'interaction de mobile à mobile offre des opportunités illimitées de services de valeur, et enfin, l'architecture à trois niveaux est considérée avec l'introduction de la notion de cloudlet. Pour chaque contexte, nous explorons la performance de notre cadre axé sur le service et le comparons à d'autres solutions existantesThe growth of connected devices, mostly due to the large number of internet of things IoT deployments and the emergence of mobile cloud services, introduces new challenges for the design of service architectures in mobile cloud computing MCC. An MCC framework should provide elasticity and scalability in a distributed and dynamic way while dealing with limited environment resources and variable mobile contexts web applications, real-time, enterprise services, mobile to mobile, hostile environment, etc. that may include additional constraints impacting the design foundation of cloud services. We show in this thesis how service-oriented architecture SOA can be a key solution to provide distributed mobile cloud services and how OSGi platform can be an adaptive and efficient framework to provide such implementation. We adapt the proposed MCC framework to different architecture contexts. The first one is a traditional centric model, where mobile devices are reduced to consuming services. The second one is a distributed model where the power of mobile-to-mobile interaction offers unlimited value-services opportunities, and finally, three-tier architecture is considered with the introduction of the cloudlet notion. For each context, we explore the performance of our service-oriented framework, and contrast it with alternative existing solutions
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Pakkala, Daniel. "Lightweight distributed service platform for adaptive mobile services /." Espoo [Finland] : VTT Technical Research Centre of Finland, 2004. http://www.vtt.fi/inf/pdf/publications/2004/P519.pdf.
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Lipperts, Steffen Richard Goswin. "Mobile agent support services." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964753065.
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Asif, Muhammad. "Personalization of Mobile Services." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25576.
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The mobile era is well established and the number of smartphone users is showing exponential growth. The capability of smartphones and enabling technologies is also increasing and has opened many possibilities of personalized mobile services. The goal of personalization is to support the user by providing the right service at the rightmoment. Early focus of personalization was on content adaptations in different information systems. The new approaches of personalization are still needed for mobileservices as it is a compelling feature of mobile communication systems for both endusers and service providers.Personalization is providing a means of fulfilling users’ needs more effectively andefficiently and, consequently increasing users’ satisfaction. By providing successfulpersonalization, a high degree of user satisfaction and a pleasant user experience can beachieved. Some features of personalization can cause problems and may outweigh thebenefits of personalization.This thesis has focused on how to achieve scrutable mobile client-side personalizationwhile keeping the user’s privacy. The issue of privacy in personalization of mobileservices can be reduced by shifting the control of their personal information towards theusers. Our research goal is to understand and improve the personalization process anddevelop an architecture for scrutable mobile client-side personalization while keepingthe user s’ privacy. Moreover, there is a need to develop an evaluation framework tomeasure the effectiveness of mobile services personalization. A design science researchmethodology is adopted in this research work. More particular contributions of thethesis are as follows: C1: Identifications of the research issues and challenges in personalization of mobileservices. C2: An approach for delivering personalized mobile services. C3: Development of mobile client-side personalization architecture. C4: Development of mobile services Personalization Evaluation Model. C5: Identification of the prospects of scrutable personalization of mobile services.
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Peltomaa, M. (Miira). "User-centric service design in mobile health care services." Master's thesis, University of Oulu, 2019. http://jultika.oulu.fi/Record/nbnfioulu-201906052408.
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Abstract. The growing age of populations brings widespread problems for a range of services, including health care services. Another challenge is the areas of dispersed settlement and decreasing population in rural areas. Urbanization and movement to the larger cities after employment, education, and services has led to decreasing the services in the remote areas even further. In the changing needs of the requirements and challenges of health care entities the use of mobile health care services may provide many benefits to the systems to develop flexible and adjustable health services to citizens. With the help of mobile health care services, the requirements of ever-changing service needs may be responded more efficiently than traditional onsite health care centers.
The purpose of this study is to understand the opportunities of user-centric service design and practices in the design processes of mobile health care services. In the future, mobile health care services may potentially be a medium for implementing the health and social service delivery as one of the standard mediums in order to reduce inconsistencies between habitant areas in Finland. By designing user-centric services with methods that leave room for ongoing development and improvement of mobile health care services.
The nature of the study is a qualitative case study. The research phenomenon is approached by semi-structured interviews, to define practicalities in the planning of a mobile health care services. The target group of the interview is particularly chosen participants from representative organizations from both private and public health sector.
The results of the study confirm the adaptability of user-centric service design in mobile health care services. It also reveals many practical aspects regarding the design process and the possibilities in co-design activities. More precisely, this study suggests that the user of the service can be included in all stages of service design process of mobile health care services in several ways — from defining the need to the implementation and ongoing development. The user-centricity in the context of this study means the users of the service that are involved in the service operations along its way — including employees and other encounters to the service.
The results of the study contribute to the model of service design by assessing its suitability to designing mobile health care services with user-centric approach, and gathering concrete practices of those methods.
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Pajarito, Grajales Diego Fabián. "Mobile Services for Green Living." Doctoral thesis, Universitat Jaume I, 2018. http://hdl.handle.net/10803/664143.
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Although many cities are promoting urban cycling, they do not analyse behavioural patterns or barriers faced during cycling
with geospatial technologies. This thesis, placed within the fields of geoinformatics and serious games, aims to help both
citizens and cities to better understand cyclist behaviour and mobility patterns. We analyse how the incentives of geo-games
might increase urban cycling engagement and, through this engagement, crowdsource cycling data collection and comprehend
cycling patterns. We designed a between-groups experiment to measure the impact of virtual rewards provided by a geo-game
on the levels of intention, satisfaction, and engagement with cycling. Then, to identify the frictions which potentially inhibit
bicycle commuting, we analysed the bicycle trips crowdsourced with the geo-game.The results support the use of
collaboration-based rewards in game-based applications to promote urban cycling and describe 284 places potentially having
frictions in three European cities. This thesis encompasses the cyclist and city perspectives of using mobile technologies to
crowdsource cycling data collection and analyse urban cycling.A pesar de promover el ciclismo urbano, las ciudades no usan tecnologías geo-espaciales para analizar los patrones de comportamiento ni las barreras que enfrentan los ciclistas urbanos. Esta tesis, enmarcada dentro de los campos geo-informática y juegos serios, busca ayudar a los ciudadanos y las ciudades en la comprensión del comportamiento y patrones de movilidad ciclista, analiza cómo los incentivos presentes en geo-juegos pueden involucrar usuarios, descentralizar la recolección de datos de ciclismo y mejorar la comprensión de patrones. Se diseñó un experimento entre grupos para medir el impacto de los incentivos virtuales en la intención, satisfacción y compromiso con el ciclismo urbano. Posteriormente, para identificar las fricciones que potencialmente restringen el transporte en bicicleta, se analizaron los viajes recolectados con el geo-juego. Los resultados soportan el uso de incentivos basados en colaboración en geo-juegos para promover el ciclismo urbano y describen 284 sitios con potenciales fricciones en tres ciudades europeas. Esta tesis compila las perspectivas del ciclista y la ciudad sobre el uso de tecnologías móviles para recolectar información descentralizada y analizar el ciclismo urbano.
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Un, Man Wai. "Pricing in mobile communications services." Thesis, University of Macau, 2003. http://umaclib3.umac.mo/record=b1636778.
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Zubari, Sinem. "Customer Value Of Mobile Services." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612716/index.pdf.
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Mobile devices are becoming widely common today. As the number of mobile devices continue to grow all around the world, its functionality is extending and mobile technologies are gaining more popularity in every aspect of our life. Today, wide range of mobile services is offered to people. The purpose of our study is examining the customer value of mobile services for individuals or citizens. A value model for mobile services has been proposed with five dimensions: Functional Value, Social Value, Emotional Value, Epistemic Value and Economic Value. The effect on each value dimension on Intention to Use (ITU) is aimed to be determined. A survey instrument for mobile Internet services and short message services (SMS) has been developed to validate the proposed model. After assuring the reliability of instrument with a pilot
study, data was collected from 303 people working in information and communication technologies (ICT) sector in Turkey. For analyzing proposed model variance-based structural equation modeling (partial least squares) was used. Before evaluating model, exploratory factor analysis (EFA) was conducted to indentify underlying constructs. Based on EFA results, Functional Value was found to have sub-dimensions namely: Ubiquity Value, Performance Value and Security Value. The measurement model was analyzed using confirmatory factor analysis (CFA). The structural model was analyzed using predictive power. For both mobile Internet and SMS, moderate predictive power has been gathered. Finally, the effect of each value dimension on intention to use (ITU) has been evaluated. Ubiquity Value, Performance Value and Epistemic Value have significant effect on ITU for mobile Internet. On the other hand, Economic Value and Performance Value have significant effect on ITU The indications of this research will be valuable for providing information about customer value of current mobile services.
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Bø, Solvår, and Stian Rene Pedersen. "Privacy services for mobile devices." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13835.
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Recent studies have shown that privacy on mobile devices is not properly ensured. Due to a heavy increase of smartphones in the market, in addition to a variety of third-party applications, a demand for improved solutions concerning privacy has arisen. Our objective is to extend users' ability to control applications' access to resources at run-time. We investigate whether such a solution is adequate or not, in order to properly maintain privacy. We propose a design that provides a higher degree of control by allowing users to set preferences that determines what personal information to share. Previous efforts only give users a binary choice on whether to fake personal information or not. We offer a more flexible solution that allows users to set preferences with a higher degree of granularity. We implement selected parts from our design, in order to evaluate whether this solution serves as a utility or not. Further evaluation is a necessity in order to fully accept or reject the idea. However, our initial results are promising.
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Mumtaz, Majid. "Security Services for Mobile Applications." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-116762.
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In today's era of technology, information can revolve the whole world within seconds via Internet. Devices such as smartphones, tablets and smart applications running on them enable users to access information anytime and anywhere over the air network. Ubiquitous nature of smartphones stimulates the growth of applications development, especially for small scale devices. Protection and security of sensitive mobile applications and their resources against threats are new emerging challenges for mobile application developers. Even competitive enterprise application development organizations lack comprehensive security services for small scale devices. Ultimately unpredictable threats become active anytime and can easily hamper the whole infrastructure within short time frame. In future enterprise applications, to protect entities and overall access of back-end secure infrastructure and services secure and easy to deploy strong authentication and authorization services will play a key role. Complexity of security risks in wireless networks is changing the ways of protection mechanisms for mobile applications. Achieving security balance with convenience becomes a challenging task for application developers. Due to complex blurred picture of an attack in an enterprise applications development, usually the developers don't pay attention against the mitigation of such threats at the initial phase of application development. Due to this, weaknesses appear in latter stages that make an application system vulnerable. Conventionally it is a common practice by application developers to rely on username/password authentication mechanism, and even more secure way that is considered to be a One Time Password (OTP) or complex passphrase schemes. These schemes have a number of limitations and drawbacks regarding today’s diverse wireless environments. In this research we used Public Key Infrastructure (PKI) certificate-based strong authentication scheme for small scale devices which is a significant step-up from simple username/password, OTP and location-based authentication schemes. Leading standards which we followed FIPS 201 Personal Identity Verification standard and FIPS 196 Strong Authentication Protocol scheme. Our solution is based on secure smart microSD card that can be used for providing high level of security for mobile enterprise applications. Also other considerable security services included confidentiality of exchanged transaction messages between applications and back-end application provider server, integrity of transaction messages, and non-repudiation services.
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Strengbom, Kristoffer. "Mobile Services Based Traffic Modeling." Thesis, Linköpings universitet, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-116459.
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Traditionally, communication systems have been dominated by voice applications. Today with the emergence of smartphones, focus has shifted towards packet switched networks. The Internet provides a wide variety of services such as video streaming, web browsing, e-mail etc, and IP trac models are needed in all stages of product development, from early research to system tests. In this thesis, we propose a multi-level model of IP traffic where the user behavior and the actual IP traffic generated from different services are considered as being two independent random processes. The model is based on observations of IP packet header logs from live networks. In this way models can be updated to reflect the ever changing service and end user equipment usage. Thus, the work can be divided into two parts. The first part is concerned with modeling the traffic from different services. A subscriber is interested in enjoying the services provided on the Internet and traffic modeling should reflect the characteristics of these services. An underlying assumption is that different services generate their own characteristic pattern of data. The FFT is used to analyze the packet traces. We show that the traces contains strong periodicities and that some services are more or less deterministic. For some services this strong frequency content is due to the characteristics of cellular network and for other it is actually a programmed behavior of the service. The periodicities indicate that there are strong correlations between individual packets or bursts of packets. The second part is concerned with the user behavior, i.e. how the users access the different services in time. We propose a model based on a Markov renewal process and estimate the model parameters. In order to evaluate the model we compare it to two simpler models. We use model selection, using the model's ability to predict future observations as selection criterion. We show that the proposed Markov renewal model is the best of the three models in this sense. The model selection framework can be used to evaluate future models.
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Houacine, Fatiha. "Service-Oriented Architecture for the Mobile Cloud Computing." Electronic Thesis or Diss., Paris, CNAM, 2016. http://www.theses.fr/2016CNAM1110.
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La croissance des appareils connectés, principalement due au grand nombre de déploiements de l'internet des objets et à l'émergence des services de cloud mobile, introduit de nouveaux défis pour la conception d'architectures de services dans le Cloud Computing Mobile (CCM) du cloud computing mobile. Nous montrons dans cette thèse comment l'architecture orientée services SOA peut être une solution clé pour fournir des services cloud mobiles distribués et comment la plate-forme OSGi peut être un cadre adaptatif et efficace pour fournir une telle implémentation. Nous adaptons le cadre CCM proposé à différents contextes d'architecture. Le premier est un modèle centré traditionnel, où les appareils mobiles sont réduits à consommer des services. Le second est un modèle distribué où la puissance de l'interaction de mobile à mobile offre des opportunités illimitées de services de valeur, et enfin, l'architecture à trois niveaux est considérée avec l'introduction de la notion de cloudlet. Pour chaque contexte, nous explorons la performance de notre cadre axé sur le service et le comparons à d'autres solutions existantesThe growth of connected devices, mostly due to the large number of internet of things IoT deployments and the emergence of mobile cloud services, introduces new challenges for the design of service architectures in mobile cloud computing MCC. An MCC framework should provide elasticity and scalability in a distributed and dynamic way while dealing with limited environment resources and variable mobile contexts web applications, real-time, enterprise services, mobile to mobile, hostile environment, etc. that may include additional constraints impacting the design foundation of cloud services. We show in this thesis how service-oriented architecture SOA can be a key solution to provide distributed mobile cloud services and how OSGi platform can be an adaptive and efficient framework to provide such implementation. We adapt the proposed MCC framework to different architecture contexts. The first one is a traditional centric model, where mobile devices are reduced to consuming services. The second one is a distributed model where the power of mobile-to-mobile interaction offers unlimited value-services opportunities, and finally, three-tier architecture is considered with the introduction of the cloudlet notion. For each context, we explore the performance of our service-oriented framework, and contrast it with alternative existing solutions
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Fouial, Ouahiba. "Découverte et fourniture de services adaptatifs dans les environnements mobiles." Phd thesis, Télécom ParisTech, 2004. http://pastel.archives-ouvertes.fr/pastel-00000887.
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Avec l'avènement de la troisième génération, les réseaux de télécommunications mobiles entrent dans une nouvelle phase de leur évolution, d'un réseau omniprésent axé sur la téléphonie mobile, vers des systèmes de fourniture de services à grande échelle. Ces systèmes doivent permettre à des usagers (éventuellement mobiles) d'accéder à leurs services et leur environnement personnalisés quels que soient le réseau et le terminal qu'ils utilisent. Le constat actuel est que la mise en place de la fourniture de services pour ces systèmes nécessite la conception d'une plate-forme distribuée complexe faisant intervenir des éléments hétérogènes (grand choix de réseaux, plusieurs types de terminaux de capacités différentes, multiples opérateurs réseau et fournisseurs de services, contenus de services hétérogènes, etc.). Par ailleurs, l'évolution des terminaux mobiles (ordinateurs portables, assistants personnels, téléphones portables, etc.) et des réseaux mobiles (émergence des réseaux sans fil) permet le développement d'applications fondées sur la mobilité. L'environnement d'exécution de ces applications doit prendre en compte la variété des équipements et des ressources (ex: bande passante) ainsi que la mobilité de l'utilisateur. De plus, les usagers mobiles veulent pouvoir personnaliser les services et les utiliser de la même manière qu'en environnement fixe et ce, quel que soit le service à traiter et quelles que soient les capacités du terminal utilisé. L'objectif de cette thèse est de donner des éléments de solution à ces problèmes. Elle traite de la découverte et la fourniture de services adaptables dans les environnements mobiles. Elle a pour but de proposer une architecture permettant aux usagers mobiles de découvrir et d'exécuter des services sensibles au contexte de leur exécution. Les services proposés sont adaptés aux préférences de l'usager, aux capacités de son terminal, à sa localisation, et enfin, aux ressources réseau disponibles. Dans un premier temps, nous nous intéressons à l'utilisation des agents mobiles pour la fourniture de services dans les environnements mobiles. Ce modèle, bien adapté aux contraintes des environnements mobiles, s'avère intéressant, principalement, dans les applications qui entraînent la consultation de plusieurs services successifs sur le réseau (ex: visite de plusieurs prestataires de services dans le cadre d'une découverte de services). Par la suite, nous proposons une plate-forme de fourniture de services sensibles au contexte appelée CASP (Context Aware Service Provision). Dans cette plate-forme, la sensibilité au contexte est prise en compte dans les deux phases de fourniture de services suivantes: la découverte de services et l'exécution du service sur le terminal mobile. CASP utilise un mécanisme de découverte de services qui permet à l'usager mobile de personnaliser la fourniture de services et de l'adapter à ses exigences. Ce mécanisme, mis en oeuvre par un élément médiateur entre l'usager mobile et les fournisseurs de services, permet de ne proposer à l'usager que les services qui sont adaptés à ses préférences, aux capacités de son terminal et à sa localisation. L'implémentation de ce mécanisme de découverte de services est basée sur des concepts tels que VHE (Virtual Home Environment) et les profils, et utilise des outils standard tels que XML et CC/PP (Composite Capabilities/ Preference Profiles). La sensibilité au contexte dans la plate-forme CASP est également utilisée pour adapter les services, une fois découverts par l'usager, à leur environnement d'exécution. Cette adaptation est réalisée au moment de l'exécution du service sur le terminal mobile. La solution proposée est basée sur l'utilisation de serveurs intermédiaires (Serveur Proxy) entre le terminal mobile et le fournisseur du service. Un service multimédia a été développé pour valider les concepts proposés dans cette thèse. Enfin, nous terminons par une ouverture sur l'utilisation d'une approche de conception de services à base de composants.
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Olaussen, Gunn, and Kirsti Nordseth Torgersen. "eGovernment Services in a Mobile Environment." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10090.
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This report was written as part of our thesis based on an assignment provided by Kantega. It deals with the use of mobile phones to access eGovernment services using the Liberty Identity Web Services Framework (ID-WSF). Additionally, it explores the use of strong authentication mechanisms on mobile phones while using the phone as the terminal to access such services. The first part of the report describes the project and its goals. In this process, it defines three research questions that will be answered in the course of the thesis. Furthermore, it outlines how these questions should be answered. This part also includes a presentation of the prototype that was developed later in the project. The second part of the report concentrates on the theoretical basis of the assignment. Existing standards and technologies for strong authentication and Liberty-enabled products are explored and evaluated. The focus of the evaluation is upon whether the technologies could be used in the prototype. The third part of the report contains the requirements specification, design, implementation and testing documentation for the prototype. This part aims to describe all aspects of the prototype development and enables us to show that it is a valid proof-of-concept. Requirements and design incorporating strong authentication into the prototype are also provided, although this functionality was not implemented as specified in the assignment. The last part of the report evaluates the results obtained in the course of the thesis and especially the resulting prototype. The prototype fulfills our requirements well, but there where some reservations on the security in the strong authentication design. This part also looks at what can be done in the future to further explore the topic and improve the results. Finally, it shows how the report has answered the research questions we defined in the beginning of the thesis by completing a prototype that accesses eGovernment services using Liberty ID-WSF.
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Johnsrud, Lars. "Efficient Web Services on Mobile Devices." Thesis, Norwegian University of Science and Technology, Department of Telematics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8838.
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Efficient solutions for Web Services on mobile devices would allow truly global, platform independent and interoperable information access, anywhere and at any time. While Web Services are continuously gaining ground, they are commonly reserved for use on personal computers and high-capacity servers, even though mobile devices are continuously becoming more advanced in terms of processing resources and wireless communication capabilities. This thesis identifies several challenges of accessing Web Services from mobile devices, and evaluates and discusses methods for creating more efficient solutions. Some of the challenges are the limited bandwidth and high communication latency. Reducing the size of XML information transferred and optimizing the communication protocol stack are identified as possible solutions to overcome these challenges. Additionally, as the communication cost correlates with the amount of data transferred, more efficient Web Services solutions are clearly beneficial for the end-user. The approaches described to reduce the size of XML files are traditional compression, alternative representation of the files, and binary XML. Binary XML is a compact representation of information that keeps the desirable structure of XML intact. The Efficient XML Interchange format currently being standardized by W3C is studied in more detail. Furthermore, optimizing the protocol stack has also been evaluated. A prototype Web Service system has been developed and tested in both simulated environments and in real surroundings using GPRS, EDGE and UMTS network connections. The results from the measurements show that both compression and the use of binary XML reduce the size of the information significantly and thereby the cost. Time needed to transfer the information is also reduced, and this effect is most apparent when the original files are large. Binary XML may however be the desirable format since it enables direct interaction with the information and keeps the memory footprint small. To reduce the time needed to transfer the information further, removing the HTTP protocol and optimizing the transport protocol, seems to minimize the effect of the latency.
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Leung, Adrian Ho Yin. "Securing mobile ubiquitous services trusted computing." Thesis, Royal Holloway, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.537518.
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Iqbal, Muhammad Imran. "Preferential Coding for Mobile Multimedia Services." Licentiate thesis, Karlskrona : Blekinge Institute of Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00468.
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Different parts of source encoded multimedia streams such as those associated with standard image or video formats possess different levels of importance with respect to their contribution to the quality of the reconstructed image or video. This unequal importance among data within a codestream gives rise to preferential treatment of the more significant parts of the codestream compared to the less important parts. Similarly, visual information offered by certain regions of an image or video may attract viewer’s attention more than other parts of the viewing area. As a consequence, preferential treatment of important data and information can play a vital role in mobile multimedia services in order to preserve satisfactory quality of service under the harsh conditions of a band-limited, error-prone wireless channel. In this thesis, we therefore, investigate how preferential coding can be used to protect multimedia services more efficiently against transmission errors. For this purpose, an error sensitivity analysis of the specific application is utilized as a basis to design efficient unequal error protection (UEP) schemes. The performance of the proposed preferential coding schemes is evaluated using objective perceptual quality metrics in order to account for the fact that humans are the ultimate judges of service quality. The thesis is divided into four parts. In the first part, region of interest (ROI) identification, coding and advantages of ROI coding for different applications are investigated. In addition, a framework is proposed for using ROI coding in wireless imaging. The second part analyses the error sensitivity of wireless JPEG2000 (JPWL) in terms of perceptual quality metrics. It is also shown that using reduced- reference perceptual quality metrics as error sensitivity descriptor (ESD) in JPWL increases the effectiveness of ESD. Specifically, this type of metrics correlates well with subjective quality assessment and provides an additional estimate for the obtained quality. In the third part, two UEP schemes for JPWL are proposed and compared with equal error protection (EEP). Their performance is evaluated in terms of perceptual quality metrics such as structural similarity index and the visual information fidelity criterion of the reconstructed image and their benefit over EEP is revealed. Finally, in the fourth part, a framework for optimized preferential coding of ROI based images and videos is proposed. Specifically, a dynamic programming algorithm for optimal parity distribution is provided.
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FILHO, CARLOS OSWALDO BOTELHO GADELHA. "MOBILE TELEPHONY: PREFERENCES FOR NEW SERVICES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7656@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRODesde 1999, com a entrada de novas operadoras de telefonia móvel no mercado brasileiro, trazendo consigo a telefonia celular digital, o número de usuários vem crescendo exponencialmente. Com a entrada em operação da tecnologia GSM, padrão usado na Europa, uma nova gama de serviços se abriu aos usuários, intensificando ainda mais o crescimento do número de aparelhos celulares habilitados, que hoje chega à casa dos 75 milhões. A quantidade de serviços móveis, muito além do serviço básico de voz - isto é, o serviço de conversação - vem crescendo a cada ano, o que levanta a questão: quais serviços móveis terão sucesso junto ao público? Este trabalho estuda, dentre os serviços móveis já disponíveis e outros em fase de desenvolvimento, quais deles têm o interesse do público brasileiro. Através de uma pesquisa de campo busca descobrir as atitudes dos consumidores frente a diversos tipos de serviços móveis. Os resultados revelam as preferências sobre os serviços móveis, que, se analisadas de acordo com o sexo e a idade dos respondentes, mostram diferenças de atitude. Entre elas, mostram que os consumidores aprovam os serviços de mensagem de texto, o uso do aparelho celular como controle remoto e para pagamento de ingressos de cinema, mas não se interessam por TV ou jogos no aparelho celular.
Since 1999 with the arrival of new mobile operators in Brazilian market place, bringing the digital telephony, the number of mobile phone users has been growing steadily. With the beginning of operation of GSM - the european mobile technology pattern - this growth had increased dramatically, boosted by a new mobile service portfolio offer. Nowadays the number of mobile lines in service reaches the amount of 75 million. The variety of mobile services, each of them far beyond the basic voice service, has been also growing year by year, a fact that raises a question: which mobile services will succeed? This work studies, among mobile services already available and those still being developed, witch of them would interest Brazilian users. By using a survey, it intends to find consumer attitudes face several kinds of mobile services. The results show preferences about mobile services that may change depending on gender or age of respondents. The survey indicates the approval of text messaging service, remote control service and theater ticket´s payment, but also reveals a lack of interest in watching TV or playing games in mobile phones.
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Fredén, Magnus. "Mobile Internet : Testing of Internet services." Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92295.
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In addition to the problems that may occur in the Internet, the people who test mobile internet services confront additional challenges due to the wireless environment. If something goes wrong, it is very problematic for a tester to determine exactly where the error occurred and the reason why it occurred. Is it the software in the telephone that does not work properly, is the GPRS link stable, is the core network of the Internet working as it should, or is there something wrong at the server? The staff at Sony Ericsson has major difficulties determining where the origin of a problem is. They often simply know that something is not working. The major effort is often to detect the source of the actual problem rather than solving it. The PlayNow service provided by Sony Ericsson will be used as a reference service in this master’s thesis project. The PlayNow service is currently used for distributing ring signals. It is built on Internet standards, but depends on GSM’s specific features both for distribution and for e-commerce which makes it hard to test using existing web test tools. This Master’s Thesis examines the difficulties in establishing robust IP traffic links between a server and a mobile telephone. It examines the entire communication path between the mobile telephone and the server, and focus on how to detect (potential) errors. Within this project, development of a test tool is included. It supports features necessary for testing the reference service PlayNow. This report covers many different technologies within the mobile internet such as GSM, GPRS, and mobile IP. Moreover, the normal infrastructure of the Internet will also be considered; as well as how the different parts interact in an environment consisting of a mobile Internet with GPRS. A major part of the project has been evaluation of the communication link between a mobile device and a server. Additionally, some efforts have focused on developing the new test tool.Utöver de problem som kan uppstå på Internet, konfronteras testare av mobila tjänster av ytterligare utmaningar på grund av den trådlösa miljön. Går något fel kan det vara väldigt svårt att lokalisera var problemet har uppstått och anledningen till varför det uppkom. Är det mjukvaran i telefonen som inte fungerar, är GPRS anslutningen stabil, fungerar kommunikationen över Internet som det ska, eller är det något fel med applikationsservern? De anställda på Sony Ericsson har många gånger stora problem att definiera vad källan till ett problem är. Ofta vet de bara att något är fel. Den stora mödan är ofta att hitta källan till problemet snarare än att lösa det. Tjänsten PlayNow som tillhandahålls av Sony Ericsson är referenstjänst för detta arbete. För närvarande används PlayNow för distribuering av ringsignaler. Tjänsten bygger på Internetstandards, men är även beroende av GSM specifika delar för både distribution och e-handel, vilket gör det svårt att testa denna tjänst med vanliga testverktyg för webben. I detta examensarbete undersöks svårigheterna med att etablera robust IP trafik mellan en mobiltelefon och en server och fokuserar på hur potentiella fel kan upptäckas. Inom ramen för detta arbete har ett testverktyg utvecklats. Detta verktyg tillhandahåller funktionalitet för att testa referenstjänsten PlayNow. Denna rapport behandlar många olika teknologier inom mobilt Internet, såsom GSM, GPRS och Mobil IP. Utöver detta har den vanliga Internet teknologin behandlas. Så som de andra delarna som är inkluderade i mobilt Internet med GPRS. En större del av arbetet har varit utvärdering av kommunikationsvägen mellan klient och server. Utöver detta har en del ansträngning lagts på att utveckla det nya testverktyget. Denna rapport visar på de svårigheter i att hitta källan till ett problem i kommunikationsvägen, vilka kan vara mycket svåra att hitta. För att göra felsökning enklare har ett testverktyg utvecklats. Med hjälp av detta nyutvecklade testverktyg, många brister i konfigurationen av PlayNow servern har blivit upptäckta och tillrättade.
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McInerney, James. "Intelligent agents for mobile location services." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/365495/.
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Understanding human mobility patterns is a significant research endeavour that has recently received considerable attention. Developing the science to describe and predict how people move from one place to another during their daily lives promises to address a wide range of societal challenges: from predicting the spread of infectious diseases, improving urban planning, to devising effective emergency response strategies. Individuals are also set to benefit from this area of research, as mobile devices will be able to analyse their mobility pattern and offer context-aware assistance and information. For example, a service could warn about travel disruptions before the user is likely to encounter them, or provide recommendations and mobile vouchers for local services that promise to be of high value to the user, based on their predicted future plans. More ambitiously, control systems for home heating and electric vehicle charging could be enhanced with knowledge of when the user will be home. In this thesis, we focus on such anticipatory computing. Some aspects of the vision of context-awareness have been pursued for many years, resulting in mature research in the area of ubiquitous systems. However, the combination of surprisingly rapid adoption of advanced mobile devices by consumers and the broad acceptance of location-based apps has surfaced not only new opportunities, but also a number of pressing challenges. In more detail, these challenges are the (i) prediction of future mobility, (ii) inference of features of human location behaviour, and (iii) use of prediction and inference to make decisions about timely information or control actions. Our research brings together, for the first time, the entire workflow that a mobile location service needs to follow, in order to achieve an understanding of mobile user needs and to act on such understanding effectively. This framing of the problem highlights the shortcomings of existing approaches which we seek to address. In the current literature, prediction is only considered for established users, which implicitly assumes that new users will continue to use an initially inaccurate prediction system long enough for it to improve and increase in accuracy over time. Additionally, inference of user behaviour is mostly concerned with interruptibility, which does not take into account the constructive role of intelligent location services that goes beyond simply avoiding interrupting the user at inopportune times (e.g., in a meeting, or while driving). Finally, no principled decision framework for intelligent location services has been provided that takes into account the results of prediction and inference. To address these shortcomings, we make three main contributions to the state of the art. Firstly, we provide a novel Bayesian model that relates the location behaviour of new and established users, allowing the reuse of structure learnt from rich mobility data. This model shows a factor of 2.4 improvement over the state-of-the-art baseline in heldout data likelihood in experiments using the Nokia Lausanne dataset. Secondly, we give new tools for the analysis and prediction of routine in mobility, which is a latent feature of human behaviour, that informs the service about the user’s availability to follow up on any information provided. And thirdly, we provide a fully worked example of an intelligent mobile location service (a crowdsourced package delivery service) that performs decision-making using predictive densities of current and future user mobility. Simulations using real mobility data from the Orange Ivory Coast dataset indicate a 81.3% improvement in service efficiency when compared with the next best (non-anticipatory) approach.
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Kanagwa, James R. "Establishing Mobile Financial Services in Ethiopia." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2319.
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Mobile phone service is increasing among low income populations; however, with over 1 billion mobile service users worldwide, many people still lack banking services. Banks do not reach out to the poor because of the high operational costs involved. Scholars and industry practitioners have indicated that mobile phones could be an alternative channel for delivering financial services to the less advantaged and unbanked, without requiring a traditional bank with a branch network. The purpose of this bounded case study was to explore the strategies bank managers used to implement the new mobile banking service to the Ethiopian community. The new product development theory served as the conceptual framework for this study. Twenty experienced bank managers were interviewed from the leading private bank in Ethiopia. Data were segmented and categorized. After member checking and triangulation, data were sorted into 4 themes: development, testing, commercialization of new products or services, and an organizational commitment to adopt new technologies and innovative processes. The findings may contribute to the body of knowledge regarding strategies bank managers can use for implementing and introducing new products in order to contribute to the prosperity of individuals, businesses, and communities.
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MARTIRE, FRANCESCA. "Context-aware services for mobile devices." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/518.
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La Context-awareness, è un insieme di features tecniche che permette di offrire una vasta gamma di servizi dove le informazioni “seguono” gli utenti. Tali servizi promettono di fornire le informazioni di cui l’utente necessita nel momento giusto, al posto giusto e nel modo più semplice, veloce e opportuno. La prima parte della mia attività di ricerca si è focalizzata su un sottoinsieme di aspetti associati alla Context Awareness. Il lavoro si colloca in un progetto di ricerca finanziato dalla Comunità Europea: il progetto SIMPLICITY. Simplicity propone una generalizzazione del concetto di “portabilità”, permettendo agli utenti di muoversi senza vincoli tra differenti applicazioni distribuite e diversi servizi, utilizzando tecnologie di rete ed apparecchiature eterogenee. A partire da questi obiettivi la mia ricerca si è concentrata proprio sul Profilo d’utente prendendo come punto di partenza il Generic User Profile proposto dal 3GPP(GUP). Il mio lavoro si è focalizzato su un ripensamento dell’ architettura proposta dal 3GPP e la struttura che alla fine ne deriva ricopre ed estende tale modello. La ricerca si è successivamente spostata sul contenuto del profilo utente e quindi sui dati che tale profilo doveva contenere. Nella tesi è presentato anche il concetto di Simplicity Device(SD), un dispositivo portatile, che permette agli utenti di “portare” da un terminale ad un altro la propria identità digitale, i propri dati personali e le proprie preferenze. L’utilizzo congiunto di un profilo d'utente personale e di un dispositivo hardware (SD), permette di ottenere una configurazione automatica, trasparente, e personalizzata, di terminali, dispositivi, e servizi.
Nei sistemi in cui “le informazioni devono seguire gli utenti”, ecco che ci si trova a parlare di localizzazione, ossia di individuazione della posizione dell’utente in movimento. In tale prospettiva, nella seconda parte di questa tesi, il problema della localizzazione e i cosiddetti “Location Based Services” (LBS) hanno rivestito notevole interesse. Anche in questo caso l’attività si inquadra in un altro progetto di ricerca Europeo: il progetto SMS (Simple Mobile Services). In particolare i servizi SMS promettono di fornire all’utente mobile non servizi e informazioni generiche ma contestualizzate e quindi basate, tra l’altro, sulla posizione e area geografica in cui si trova nel momento in cui richiede le informazioni e i servizi stessi. Nella tesi è descritto lo studio ed implementazione di un’architettura di supporto per servizi Location Based nuovi o già esistenti. Essa è strutturata su più livelli e le interfacce realizzate consentono l’accesso semplice alle funzionalità dei livelli sottostanti. In particolare esse sono state progettate come strumenti che sollevino gli sviluppatori dai problemi relativi all’acquisizione del dato di posizione e che allo stesso tempo nascondano i dettagli delle tecniche che permettono la localizzazione stessa. Il sistema è slegato dalla particolare tecnologia di localizzazione utilizzata e ingloba in sé più tecnologie di localizzazione essendo in grado di scegliere quale utilizzare a seconda del contesto. Parallelamente l’architettura è stata pensata in modo tale da poter essere utilizzata anche in situazioni in cui non è possibile determinare la posizione corrente di un utente. L’architettura e le location API implementate, costituiscono un sistema per lo sviluppo di applicazioni Location Based per scenari sia Indoor che Outdoor. La soluzione proposta è altresì in grado di gestire in modo trasparente e senza interrompere la continuità del servizio la transizione tra spazi Indoor e Outdoor. Nella tesi sono descritti e analizzati i dettagli implementativi di ogni livello dell’architettura. Sono stati realizzati due moduli software che forniscono servizi di navigazione e localizzazione sia in spazi aperti che chiusi. I due Navigatori realizzati offrono le stesse interfacce grazie a un contenitore generico dell’informazione di posizione che entrambe utilizzano. I dettagli della definizione, implementazione e originale utilizzo di tale fondamentale oggetto, chiamato “Position object” sono altresì oggetto di questa trattazione.“Context-awareness lets computing technology to provide services to people at any time, any where, with any media but also specifically to communicate the right thing at the right time and in the right way”. Within the research field of context-aware services, researchers from industry and academia have been working on solutions for this problem for the last decade. In the first part of my research work I focused on a subset of the research field of context aware-services. The work has been performed in the context of the SIMPLICITY project. The personalization concept is based on a user profile which realizes a common underlying information model for all the elements of the Simplicity architecture. In this perspective the first part of this dissertation focuses on my specification and development of the Simplicity User Profile (SUP) to provide highly personalized context-aware services with reduced interactional complexity for the end-user. I started from the work carried out in 3GPP on the GUP but I extended and improved that approach. In this dissertation I also present the concept of the Simplicity Device (SD) which is an enhanced mobile phone that stores and handles personal information, user preferences and policies. The SD, by the simple act of “plugging” it into a terminal, becomes the “virtual” identity of the end-user. It allows the enforcement of user-personalized mechanisms to exploit service fruition, to drive automatic adaptation to terminal capabilities, and to facilitate service adaptation to various network technologies and related capabilities. The SUP, the SD together with a brokerage framework simplify the process of using current and future “services” providing a user-friendly solution. To best meet the mobile user’s current and continuously changing context, location-aware capabilities represent an important issues to be addressed. Hence the second part of this thesis consider Location-Awareness and Location Based Service(LBS). The work was performed in the framework of an another IST Project, named Simple Mobile Services (SMS). SMS services will target specific locations visited by specific classes of mobile user with specific needs. In this perspective my research activity was devoted to define, project and implement a Localization and Navigation architecture that, in many ways, enable the simple creation and development of new context-sensitive services or supply existing applications with location awareness. The driving idea was to develop simple to use interfaces leveraging the developers and the users the complexities related to the acquisition of a position information as well as hiding the particulars of the positioning technologies employed. Moreover the overall architecture is conceived to support situations in which determining the exact position of a mobile terminal is not a strict requirement, but it is enough to identify the terminal position within a radius or inside an area (e.g., rooms indoor, or zones outdoor). The software architecture also makes a combined use of indoor and outdoor location-sensing technologies being able to solve localization problems independently from the environment and the location technology in use. It also realizes a transparent and automatic switch mechanism from indoor to outdoor (and vice versa) situations without breaking the continuity of the service usage. To prove the feasibility of the entire architecture a prototypical implementation has been developed using J2ME CLDC on Java enabled phones. Both the indoor and outdoor implemented navigation applications provide the same interfaces, thanks to the general purpose definition of the same position information container used for both of them. The definition and implementation process of this object, named Position object, is here presented.
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Avgeropoulos, Konstantinos. "Service Policy Management for User-Centric Services in Heterogeneous Mobile Networks." Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93043.
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The Session Initiation Protocol (SIP) is a signaling protocol for IP-based media services that will be the de facto standard for future media-over-IP services. Since SIP User Agents (UAs) support a limited number of service types (usually one or two), we assume that the future user will need to operate several UAs simultaneously. These UAs will constitute the user's personal service network. In this thesis, we investigate architectures for policy-based management of this network so that it can be used in an efficient manner. To achieve this, we propose a new SIP entity, called the SIP Service Manager (SSM), which lies in the core of the management system. Finally, we evaluate our proposal by implementing one version of the SIP Service Manager.Session Initiation Protocol (SIP) är ett signaleringsprotokoll för IP-baserade mediatjänster som kommer att bli "de facto"-standard för framtida "media-över-IP"-tjänster. Då SIP User Agents (UAs) stöder ett begränsat antal typer av tjänster (oftast en eller två), antar vi att framtida användare kommer att behöva använda sig av flera UAs samtidigt. Dessa UAs utgör en användares personliga tjänstenätverk. I denna rapport, undersöker vi arkitekturer för policybaserad hantering (management) av detta nätverk, så att det kan användas effektivt. För att uppnå detta, föreslår vi en ny SIP-enhet, kallad SIP Service Manager (SSM), som är placerad i kärnan av hanteringssystemet. Slutligen utvärderar vi vår föreslagna lösning genom att implementera en version av en SIP Service Manager.
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Verdot, Vincent. "Approche applicative de la continuité des services en mobilité dans un milieu hétérogène." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2009. http://www.theses.fr/2009TELE0019.
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L’Homme est aujourd’hui au centre d’une sphère électronique composée de terminaux hétérogènes capables d’offrir des services similaires. Il choisit désormais l’interface adaptée à ses besoins, passant librement d’un terminal à un autre pour bénéficier d’un même service. Cette liberté induit de nouvelles problématiques de mobilité ayant un impact direct sur l’expérience utilisateur. L’état de l’art fait apparaître deux catégories de services aux caractéristiques propres : des services applicatifs revêtant diverses formes (applications locales et distantes) et des services de télécommunications reposant sur des infrastructures standardisées. L’étude des contraintes de mobilité et des approches existantes révèle que les solutions actuelles dans ce domaine sont incomplètes et ne peuvent assurer une continuité de bout en bout : désignation, transfert, adaptation, etc. Nous avons implémenté des mécanismes de continuité dans les environnements ims et web pour des services de télécommunications et multimédias afin de mettre en évidence les lacunes des solutions existantes, et identifier les fonctions élémentaires d’une gestion globale de la mobilité. Le résultat de ces travaux révèle qu’une approche plus abstraite du concept de service est nécessaire dans la définition d’un modèle générique de continuité adapté au milieu hétérogène de l’utilisateur. Nous avons introduit de nouveaux concepts et des mécanismes de mobilité originaux que nous avons ensuite implémentés dans un "distributed Service Manager". Enfin nous avons évalué ce modèle grâce à des tests qualitatifs et quantitatifs sur un prototype selon un scénario de transfert d’un service d’édition de texte dans un milieu hétérogène. Les résultats particulièrement satisfaisants prouvent la faisabilité de notre solution et son adéquation avec les contraintes de continuités temporelle et contextuellePeople now live within an electronic sphere of heterogenous devices providing similar services. From now on they can freely choose the best interface corresponding to their needs, switching from a device to another while enjoying a same service. This freedom leverage new mobility issues that directly impact the user experience. The state of the art introduces two services types with specific properties : applicative services commonly known as local or remote applications and telecommunication services based on standardised infrastructures. The study of the mobility constraints and the existing approaches shows that current solutions in this domain are incomplete and cannot assure an end-to-end continuity : selection, transfer, adaptation, etc. We implemented continuity mechanisms in the ims and web environments for telecommunication and multimedia services in order to emphasize the lacks of the existing solutions and identify the basic features of a unified mobility management model. These works led to a more abstract vision of the service concept, required to define a generic continuity model adapted to the user’s heterogeneous environment. We introduced innovative concepts and original mobility mechanisms, which we implemented in a "distributed Service Manager". Finally, we evaluated this model with qualitative and quantitative tests on a prototype according to a transfer scenario of text-edition service in a heterogeneous environment. Results are very satisfying, they prove the feasibility of our solution and its adequacy with the temporal and contextual constraints
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Chaudry, Aamer Sattar. "Design and Evaluation of Mobile-to-Mobile Multimedia Streaming using REST-based Mobile Services." Thesis, KTH, Kommunikationsnät, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53505.
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Today, it has become conveniently possible to host Web Services (WS) on mobile node using a Mobile Web Server (MWS). To address a vast range of use cases, these hosted mobileWS may be implemented to offer synchronous and asynchronous execution styles depending upon the requirements of mobile application. Thus, the MWS actually provides the necessary architectural capabilities to handle and process incoming requests for each class of service. But, it is very vital for these servers to simplify the service access and creation mechanisms, so that, the processing overheads on the hosting node are reduced. Previously, research has shown promising optimizations in MWSprocessing by using theREST architecture style for service access and creation. However, the mobile WSoffered by the existingMWSusesXML based payload for information exchange, which restricts the incorporation of the rich multimedia content, such as, audio and video data. As a consequence, the true potential of the REST -based server architecture is not utilized. This thesis addresses architectural and transport layer issues to enable the exchange of rich multimedia content between mobile nodes using mobile WS over the live wireless data networks. The research work is focused on the implementation of multimedia streaming protocol standards, such as, the RTSPand theRTP, into the existingREST-basedMWS architecture. Also, to enable the controlled Mobile-to-Mobile (M2M) media streaming capabilities, the thesis uses both TCP and UDP as transport layer protocols for signaling and data transmission, respectively. The control functions are implemented by mapping the synchronous and asynchronous mobile WS to the RTSPmethods. The implementation extends the states of the asynchronous mobileWS to offer these multimedia control functions. The issues related to the firewalls and Network Address Translation (NAT) are addressed by the development of an Intermediate Access Gateway (IAG),which offers the functionality based on the STUNandTURN concepts. This work enables mobile WS basedM2M media streaming either through the directly established connection with the peers, or via the IAG. Thus, the developed proof-of-concept prototype demonstrates the streaming capabilities of the extended MWS architecture over any wireless data networks.
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Moreno, Alcerreca Christina. "Services à haute intensité technologique : l'adoption des services de données pour téléphonie mobile en France." Thesis, Evry, Institut national des télécommunications, 2010. http://www.theses.fr/2010TELE0004.
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Face au développement des services à haute intensité technologique, se pose le problème de leur acceptation. En téléphonie mobile, les Français se rallient progressivement à ces services et cette thèse vise à comprendre cette adoption. La revue de littérature fondée sur l’adoption des innovations et son adaptation au domaine des services permet d’identifier les principaux facteurs qui influencent l’adoption des services à haute intensité technologique. Une étude qualitative exploratoire a permis d’enrichir notre cadre conceptuel que nous avons testé dans une seconde phase auprès de 350 utilisateurs de services mobiles. Finalement, la réalisation d’une étude de cas s’est avérée nécessaire pour expliquer le décollage des services de données en France à partir du lancement sur le marché d’un nouveau téléphone multifonction Smartphone en 2007-2008. Les résultats des trois études réalisées révèlent que les principaux construits du TAM sont pertinents pour expliquer l’utilisation des services à haute intensité technologique. Nos résultats mettent en valeur l’influence des communautés de marque dans le processus d’adoption des équipements et services mobilesWith the development of technology-based services the question of the level of their acceptance was raised. In mobile communication, the French progressively adopt these services. This thesis aims to understand this adoption. The study of the literature in innovations adoption helped us to identify the main factors influencing technology-based services adoption. An exploratory quality study helped us to enrich our conceptual framework. The proposed model was evaluated by quantitative survey among 350 mobile services users. Finally, the execution of a case study proved itself necessary to explain the take-off of the mobile data services in France due to the launch of a multifunction Smartphone device. The results of the three studies reveal that the TAM constructions are pertinent in the explanation of the technology-based services usage. Our results highlight the influence of brand communities in the technology-based services adoption process
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Ghanbari, Amirhossein. "Coopetition for Mobile Service Provisioning : Is it about infrastructures, services or both?" Licentiate thesis, KTH, Radio Systems Laboratory (RS Lab), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189882.
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As a means of enhancing our everyday lives, ICT industry has caused and experienced significant transformations during past two decades. This transformation relates to technological advances within ICT, and beyond the ICT ecosystem. Wireless ICT is also not an exception in this regard. Accordingly, if we consider Internet of Things (IoT) as the main enabler for transformation, M2M is then the technological enabler of IoT that represent the Wireless ICT in the process of transformation. In this thesis we benefit from the concept of Smart City as a place where Wireless ICT participates for digitalizing other industries. We investigate how smartification is taking place, where our findings show that wireless ICT mainly empowers other industries to provide M2M-enabled services. Consequently, this participation imposes major changes on the wireless ICT ecosystem itself. Therefore, we study the changes that are forming the “future wireless ICT”. We have studied cases from smart cities, and expanded our data collection by performing semi-structured interviews with experts and decision makers, as well as participating in multiple projects and workshops. Accordingly, we have benefited from two major theories for analyzing the collected data; namely ARA model and Five Forces framework. Finally, we argue that traditional actors (i.e. MNOs & Vendors), first have to adopt value co-creation in new businesses. This means cooperation among these actors, which changes the Seller-Buyer relationship to Supplier-Customer, in which they co-create the value. Accordingly, we argue that the linear processes of creating value are inefficient in these new markets and value networks must be adopted instead. As a result, we introduce “vertical coopetition” as a dominant business relationship among traditional actors, and new entrants in future wireless ICT. As the main contribution of this thesis, we discuss the logic behind vertical coopetition while comparing it with horizontal coopetition.QC 20160815
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Verdot, Vincent. "Approche applicative de la continuité des services en mobilité dans un milieu hétérogène." Thesis, Evry, Institut national des télécommunications, 2009. http://www.theses.fr/2009TELE0019/document.
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L’Homme est aujourd’hui au centre d’une sphère électronique composée de terminaux hétérogènes capables d’offrir des services similaires. Il choisit désormais l’interface adaptée à ses besoins, passant librement d’un terminal à un autre pour bénéficier d’un même service. Cette liberté induit de nouvelles problématiques de mobilité ayant un impact direct sur l’expérience utilisateur. L’état de l’art fait apparaître deux catégories de services aux caractéristiques propres : des services applicatifs revêtant diverses formes (applications locales et distantes) et des services de télécommunications reposant sur des infrastructures standardisées. L’étude des contraintes de mobilité et des approches existantes révèle que les solutions actuelles dans ce domaine sont incomplètes et ne peuvent assurer une continuité de bout en bout : désignation, transfert, adaptation, etc. Nous avons implémenté des mécanismes de continuité dans les environnements ims et web pour des services de télécommunications et multimédias afin de mettre en évidence les lacunes des solutions existantes, et identifier les fonctions élémentaires d’une gestion globale de la mobilité. Le résultat de ces travaux révèle qu’une approche plus abstraite du concept de service est nécessaire dans la définition d’un modèle générique de continuité adapté au milieu hétérogène de l’utilisateur. Nous avons introduit de nouveaux concepts et des mécanismes de mobilité originaux que nous avons ensuite implémentés dans un "distributed Service Manager". Enfin nous avons évalué ce modèle grâce à des tests qualitatifs et quantitatifs sur un prototype selon un scénario de transfert d’un service d’édition de texte dans un milieu hétérogène. Les résultats particulièrement satisfaisants prouvent la faisabilité de notre solution et son adéquation avec les contraintes de continuités temporelle et contextuellePeople now live within an electronic sphere of heterogenous devices providing similar services. From now on they can freely choose the best interface corresponding to their needs, switching from a device to another while enjoying a same service. This freedom leverage new mobility issues that directly impact the user experience. The state of the art introduces two services types with specific properties : applicative services commonly known as local or remote applications and telecommunication services based on standardised infrastructures. The study of the mobility constraints and the existing approaches shows that current solutions in this domain are incomplete and cannot assure an end-to-end continuity : selection, transfer, adaptation, etc. We implemented continuity mechanisms in the ims and web environments for telecommunication and multimedia services in order to emphasize the lacks of the existing solutions and identify the basic features of a unified mobility management model. These works led to a more abstract vision of the service concept, required to define a generic continuity model adapted to the user’s heterogeneous environment. We introduced innovative concepts and original mobility mechanisms, which we implemented in a "distributed Service Manager". Finally, we evaluated this model with qualitative and quantitative tests on a prototype according to a transfer scenario of text-edition service in a heterogeneous environment. Results are very satisfying, they prove the feasibility of our solution and its adequacy with the temporal and contextual constraints
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Mocke, Charl Anthony. "Location based services : developing mobile GIS applications." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1648.
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Holmström, Maria. "End-to-end monitoring of mobile services." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1671.
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The growing market of mobile services through SMS, MMS, WAP and soon also for 3G protocols, requires efficient test methods to ensure that the customers get what they are paying for and in a reasonable time. Preferably, these tests should be done automatically and come as close to real conditions as possible. It would be valuable to be able to make tests from end to end, i.e. requesting and receiving the mobile services on a real mobile phone and combine that with a system that controls and evaluates the tests.
This thesis presents a solution to how the part of an end-to-end monitoring system for mobile services that runs on a mobile phone can be designed and implemented. The phone is made to interpret commands from a control process on a remote server and turn them into mobile service requests in a proper format (e.g. SMS or MMS). When it receives the reply from a mobile service provider, it forwards the relevant result information to the control process.
The monitoring system is based on Symbian OS, an operating system developed to suit handheld devices like mobile phones. The current implementation supports tests for SMS and MMS services.
The system is to be used by mobile operators or other providers of mobile services, which want to test and monitor their services.
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Cao, Guangtong. "Distributed services for mobile ad hoc networks." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2541.
Full textAbstract:
A mobile ad hoc network consists of certain nodes that communicate only
through wireless medium and can move arbitrarily. The key feature of a mobile ad
hoc network is the mobility of the nodes. Because of the mobility, communication
links form and disappear as nodes come into and go out of each other's communica-
tion range. Mobile ad hoc networks are particularly useful in situations like disaster
recovery and search, military operations, etc. Research on mobile ad hoc networks
has drawn a huge amount of attention recently. The main challenges for mobile ad
hoc networks are the sparse resources and frequent mobility. Most of the research
work has been focused on the MAC and routing layer. In this work, we focus on
distributed services for mobile ad hoc networks. These services will provide some
fundamental functions in developing various applications for mobile ad hoc networks.
In particular, we focus on the clock synchronization, connected dominating set, and
k-mutual exclusion problems in mobile ad hoc networks.
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Stoffel, Wilhelm. "Legal aspects of aeronautical mobile satellite services." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56634.
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This thesis deals with the technical and legal aspects arising out of the envisaged implementation of Aeronautical Mobile Satellite Services (AMSS) for civil aviation purposes, such as communication, navigation and surveillance.After a short introduction to the subject, Part A of this thesis will deal with the technical side of the subject and will introduce the reader to the current CNS/ATM-concept and its deficiencies (Chapter 1), and to the future CNS/ATM-concept and its benefits (Chapter 2).
Part B will discuss the legal aspects of the implementation of AMSS for civil aviation purposes. Starting from the legal aspects of AMSS with respect ot the law of outer space (Chapter 3), it will explain the current regime of telecommunications developed by the International Telecommunication Union (ITU) and its impact on AMSS (Chapter 4). Then, the legal aspects of AMSS with respect to international public air law (Chapter 5) will be examined and some predominant issues with respect to the appropriate institutional framework to implement AMSS will be discussed (Chapter 6). Finally, the findings will be summarized in a conclusion.
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Elmufti, Kalid. "Authentication and privacy in mobile web services." Thesis, City University London, 2008. http://openaccess.city.ac.uk/8598/.
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This thesis looks at the issue of authentication and privacy in mobile Web services. The work in this thesis builds on GSM and UMTS security framework to develop security protocols for mobile Web services environment. The thesis initially highlights some core principles of designing security protocols in such environment. The next two chapters look at the core technologies and building blocks in Web services systems and the core security features in mobile networks mainly GSM and UMTS. Registration and authentication were identified as security issues in federated systems. Proposed solutions were developed utilizing XML security mechanisms with SIM card security in GSM environment to address these issues. Also a novel system was proposed in which it is possible for a mobile user to securely authenticate and have full anonymity as far as the service providers are concerned; however it is possible for a trusted authority to reveal the identity of the user if he or she is suspected of illegal activities. The next section analyze in detail the Generic Authentication Architecture from 3GPP. Combining SAML with the Generic Authentication Architecture, we propose a novel "generic mobile Web service platform" for M-Commerce. Various solutions have been proposed to address privacy concern in distributed networks; the Platform for Privacy Preferences is one of the popular proposal, though it has many desirable features, it is not easy to enforce it. We argue that this limitation can be managed in federated system such as the Liberty Alliance framework. In the final chapter we make the case for using timestamp based authentication protocol in mobile Web service on the ground of efficiency gain.
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ALMEIDA, VINICIUS VIDAL DE. "MOBILE TELECOMMUNICATIONS: VALUE PERCEPTIONS ON SERVICES BUNDLING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=6485@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROEsta pesquisa procura entender melhor de que forma as operadoras de telefonia móvel podem configurar suas ofertas de pacotes de produtos e serviços, através de um estudo de percepção de valor por parte dos clientes que já utilizam os serviços. Através de questionários estruturados, procurou-se avaliar a questão da percepção de valor dos usuários, examinando a compensação entre o benefício que se recebe e o sacrifício dispendido para obter esses benefícios. Apesar de o preço ser, na maioria das vezes, o lado do sacrifício na relação de valor, os resultados mostram que os usuários estão dispostos a desembolsar uma quantia até 50 por cento maior para adquirir serviços cujas características sejam mais adequados a seus padrões de uso.
The objective of this research is to understand how mbile phone operators can set their service bundling offers. An exploratory study, followed by a survey made through structured questionaries were done in order to evaluate the customers value perceptions. Value perceptions here is defined as the trade-off between the perceived benefits and the perceived sacrifice to obtain a given benefit. Although most of the times price is the sacrifice side on the perceived value relationship, the results show that on average the customers are willing to pay 50 percent more to have benefits that better fit and control their use standards.
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CALDEIRA, THARCISIO ALEXANDRINO. "READINESS AND ACCEPTANCE IN SERVICES: MOBILE PAYMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=27412@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROEsta pesquisa teve como objetivo investigar os principais fatores que influenciam a adoção e uso de tecnologias no setor de serviços, mais especificadamente no setor de serviços financeiros. O arcabouço teórico permitiu a definição de construtos cognitivos e afetivos para a elaboração do modelo conceitual. Além disso, este modelo incluiu construtos de elevada importância para o consumo de serviços financeiros, como Confiança e Risco Percebido. Por fim, o construto de Prontidão para a Tecnologia, desenvolvido por Parasuraman e Colby (2014) foi adicionado ao modelo, a fim de analisar a influência da predisposição individual em relação às tecnologias em geral, enquanto antecedente dos demais construtos. Os dados da pesquisa foram obtidos por meio de uma survey online, que foi respondida por 402 estudantes ou recém-formados de cursos de graduação e pós-graduação. O modelo final da pesquisa, denominado Modelo de Prontidão e Aceitação de Mobile Payments, indicou que a Prontidão para a Tecnologia exerce maior influência sobre os aspectos cognitivos do que sobre os afetivos, indicando que a prontidão auxilia significativamente o processo racional de avaliação da tecnologia. Além disso, os resultados indicaram que o construto de Utilidades e Vantagens Percebidas exerceu a maior influência sobre a Atitude, seguido pela Confiança e pela Apreciação da Qualidade Percebida, confirmando que os aspectos cognitivos são predominantes no processo de decisão quanto ao uso de serviços financeiros. Por fim, o Risco Percebido apresentou uma influência negativa, mas de pequena magnitude, sobre a Intenção de Uso. O Modelo de Prontidão e Aceitação de Mobile Payments foi capaz de explicar cerca de 76 porcento da Atitude e 68 porcento da Intenção em relação ao uso de tecnologias, mostrando-se um modelo com boa capacidade preditiva e de contribuição relevante para a literatura de aceitação de tecnologias.
This research aimed to investigate what factors influence the adoption and use of technologies in services, more specifically in the financial services sector. The theoretical framework allowed the definition of cognitive and affective constructs for the preparation of the conceptual model. Furthermore, this model also includes constructs with high relevance for consumption of financial services, like Trust and Perceived Risk. Finally, the Technology Readiness construct, developed by Parasuraman and Colby (2014), was added to the model in order to analyze the influence of individual predisposition in relation to technology in general, as an antecedent of the other constructs. Data was collected via an online survey, which was answered by 402 students or recent graduated of graduate and post-graduate courses. The final model, named Model of Readiness and Acceptance of Mobile Payments, indicated that the Readiness Technology has stronger effects on cognitive aspects than on the affective aspects, indicating that readiness significantly assists the rational evaluation process about the use of technologies. Furthermore, the results indicated that the Perceived Usefulness and Advantage construct has the strongest effect over Attitude, followed by Trust and by Enjoyment of Perceived Quality, confirming that the cognitive aspects are predominant in decision-making regarding the use of financial services. Finally, Perceived Risk had a negative but very little effect over Intention. The Model of Readiness and Acceptance of Mobile Payments was able to explain about 76 percent of Attitude and 68 percent of Intention, showing itself a model with good predictive capability and presenting significant contribution to the literature of acceptance of technologies.
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Yang, Xu. "Multi-channel Mobile Access to Web Services." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/30270.
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To support wireless-oriented services, a new generation of Web services called Mobile services (M-services) has emerged. M-services provide mobile users access to services through wireless networks. One of the important issues in M-service environment is how to discover and access M-services efficiently. In this dissertation, we propose time and power efficient access methods for M-services. We focus on methods for accessing broadcast based M-services from multiple wireless channels. We first discuss efficient access methods in data-oriented wireless broadcast systems. We then discuss how to extend current wireless broadcast systems to support simple M-services. We present a novel infrastructure that provides a multi-channel broadcast framework for mobile users to effectively discover and access composite M-services. Multi-channel algorithms are proposed for efficiently accessing composite
services. We define a few semantics that have impact on access efficiency in the proposed infrastructure. We discuss semantic access to composite services. Broadcast channel organizations suitable for discovering and accessing composite services are proposed. We also derive analytical models for these channel organizations. To provide practical study for the proposed infrastructure and access methods, a testbed is developed for simulating accessing M-services in a broadcast-based environment.
Extensive experiments have been conducted to study the proposed access methods and broadcast channel organizations. The experimental results are presented and discussed.Ph. D.
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Magistretti, Eugenio <1978>. "Dynamic services in mobile ad hoc networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/399/1/EugenioMagistrettiPhDThesis.pdf.
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The increasing diffusion of wireless-enabled portable devices is pushing toward the design of novel service scenarios, promoting temporary and opportunistic interactions in infrastructure-less environments. Mobile Ad Hoc Networks (MANET) are the general model of these higly dynamic networks that can be specialized, depending on application cases, in more specific and refined models such as Vehicular Ad Hoc Networks and Wireless Sensor Networks. Two interesting deployment cases are of increasing relevance: resource diffusion among users equipped with portable devices, such as laptops, smart phones or PDAs in crowded areas (termed dense MANET) and dissemination/indexing of monitoring information collected in Vehicular Sensor Networks. The extreme dynamicity of these scenarios calls for novel distributed protocols and services facilitating application development. To this aim we have designed middleware solutions supporting these
challenging tasks. REDMAN manages, retrieves, and disseminates replicas of software resources in dense MANET; it implements novel lightweight protocols to maintain a desired replication degree despite participants mobility, and efficiently perform resource retrieval. REDMAN exploits the high-density assumption to achieve scalability and limited network overhead. Sensed data gathering and distributed indexing in Vehicular Networks raise similar
issues: we propose a specific middleware support, called MobEyes, exploiting node mobility to opportunistically diffuse data summaries among neighbor vehicles. MobEyes
creates a low-cost opportunistic distributed index to query the distributed storage and to determine the location of needed information. Extensive validation and testing of REDMAN and MobEyes prove the effectiveness of our original solutions in limiting communication overhead while maintaining the required accuracy of replication degree and indexing completeness, and demonstrates the feasibility of the middleware approach.
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Magistretti, Eugenio <1978>. "Dynamic services in mobile ad hoc networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/399/.
Full textAbstract:
The increasing diffusion of wireless-enabled portable devices is pushing toward the design of novel service scenarios, promoting temporary and opportunistic interactions in infrastructure-less environments. Mobile Ad Hoc Networks (MANET) are the general model of these higly dynamic networks that can be specialized, depending on application cases, in more specific and refined models such as Vehicular Ad Hoc Networks and Wireless Sensor Networks. Two interesting deployment cases are of increasing relevance: resource diffusion among users equipped with portable devices, such as laptops, smart phones or PDAs in crowded areas (termed dense MANET) and dissemination/indexing of monitoring information collected in Vehicular Sensor Networks. The extreme dynamicity of these scenarios calls for novel distributed protocols and services facilitating application development. To this aim we have designed middleware solutions supporting these
challenging tasks. REDMAN manages, retrieves, and disseminates replicas of software resources in dense MANET; it implements novel lightweight protocols to maintain a desired replication degree despite participants mobility, and efficiently perform resource retrieval. REDMAN exploits the high-density assumption to achieve scalability and limited network overhead. Sensed data gathering and distributed indexing in Vehicular Networks raise similar
issues: we propose a specific middleware support, called MobEyes, exploiting node mobility to opportunistically diffuse data summaries among neighbor vehicles. MobEyes
creates a low-cost opportunistic distributed index to query the distributed storage and to determine the location of needed information. Extensive validation and testing of REDMAN and MobEyes prove the effectiveness of our original solutions in limiting communication overhead while maintaining the required accuracy of replication degree and indexing completeness, and demonstrates the feasibility of the middleware approach.
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Zhang, Zhen. "Delivering mobile services to mobile users in open networks: Quality of service, authentication and trust-based access control." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27745.
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This thesis describes scenarios in which a mobile user needs various services, such as Internet telephony, secure printing and online data services in a number of places. From these scenarios we summarize the requirements for quality of service control, service discovery, user authentication and authorization, service access control, and user privacy. In order to implement a prototype to support service discovery, we studied different technologies including Bluetooth, Jini, and Web Services. SDPtool from BlueZ was chosen to limit the search range within the user's local area while using minimal power consumption. Also included in the implementation, the Session Initiation Protocol is used to initiate the session and exchange messages while Java Media Framework is used to capture and deliver multimedia data. In the process of adapting Dupre's authentication protocol for user authentication, we found that it is possible for a third party to intercept the messages exchanged between a user and a Foreign Agent, which may lead to denial of service attack and weakens the strength of the user's password. The protocol is then improved by introducing additional message segments and altering the way to verify the server's response. The thesis also deals with trust relationships, which are needed as a basis for communication between the two parties. Shi's probability distribution model is introduced to integrate recommendations from different domains so that a service provider could make better decisions whether a given user should be assigned certain access rights. In the other hand, a user also depends on a trust relationship to make sure that his or her sensitive data will be handled properly. Finally, based on all of the above, a trust-based access control framework for mobile users and services is proposed and choices of implementation are briefly discussed.
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Yap, Jung Houn. "Locating services in hybrid ad hoc cellular network." Thesis, University of Surrey, 2003. http://epubs.surrey.ac.uk/623/.
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Mederreg, Amal Wafa. "Méthodologie de test pour les services et protocoles des réseaux mobiles." Evry, Institut national des télécommunications, 2004. http://www.theses.fr/2004TELE0007.
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Les domaines des télécommunications et de l'informatique ont été marqués ces dernières années par des avancées majeures avec, en particulier, l'internet et les réseaux mobiles. Ces avancées ont donné naissance à l'idée d'une convergence entre l'internet et les réseaux mobiles, ceci dans le but de fournir plus de services et de fonctionnalités aux usagers. Pour arriver à cette convergence, il a été nécessaire de concevoir de nouveaux protocoles et équipements. Ces éléments (protocoles, équipement, services. . . ) peuvent être issus de concepteurs différents ce qui complique parfois leur bon fonctionnement. Il est important donc, avant qu'ils ne soient introduits dans les réseaux, de les faire passer par un ensemble d'étapes de production. Parmi ces étapes figure celle du test. Cette étape permet de détecter les erreurs pour les corriger et de garantir le bon fonctionnement de ces éléments. Dans la phase de test, le système passe par plusieurs étapes que l'on regroupe sous la dénomination de méthodologie de test. Cette dernière peut différer selon les types de tests que l'on veut effectuer. De plus, il est important d'automatiser ces étapes dans le but de réduire le temps et le coût de développement et surtout d'augmenter la fiabilité des produits proposés. Dans cette thèse, nous proposons deux méthodologies de test pour le domaine des télécommunications mobiles : une, pour le test de conformité des services et l'autre, pour le test d'interopérabilité. Ces deux méthodologies couvrent de manière automatique toutes les étapes de la production de tests (de la spécification du système à tester à leur exécution sur une plate-forme réelle)The domains of telecommunications and computing were marked these last years by major evolutions, in particular, with Internet and the mobile networks. These evolutions gave rise to the idea of a convergence between the Internet and the mobile networks, with the goal of providing more services and functionalities to the users. To reach this convergence, it was necessary ti think for new protocols and equpements. These elements (protocols, equipments, services. . . ) may be developed by different designers and this may complicate sometimes these elements correct work. Thus , before bringing them into the network, it is important to make them go through several steps of production. Among these steps appears the test step. The test step is provided in order to detect errors in the system, to correct them and to guarantee the correct operation of these elements. In the test phase, the system goes through several stages which we gather under the denomination of methodology of test. This methodology can be different according to the different test types we want to carry out. Moreover, it is important to automate these steps in order to reduce the time and the development cost an, mainly, to increase the reliability of the proposed products. In this thesis, we present two test methodologies for the mobile telecommunications domain : the services conformity test and the interoperability test. These two methodologies cover in an automatic way all the test production steps (from the systemunder test specification to the execution on a real platform)
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Newman, Neill James. "Systems and services for wearable computers." Thesis, University of Essex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369368.
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Seshasayee, Balasubramanian. "Middleware-based services for virtual cooperative mobile platforms." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24791.
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Thesis (Ph.D.)--Computing, Georgia Institute of Technology, 2008.Committee Chair: Schwan, Karsten; Committee Member: Fujimoto, Richard; Committee Member: Narasimhan, Nitya; Committee Member: Pande, Santosh; Committee Member: Riley, George.
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Farkas, Károly. "Supporting distributed services in Mobile Ad hoc Networks /." Aachen : Shaker Verlag, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16987.
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Asif, Muhammad. "Student Centric Mobile Services : Design, Implementation and Evaluation." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10811.
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This project is a continuation of research work done by (Asif, 2009) which proposed an extended architecture of Mobile Student Information System (MSIS) to integrate the systems available for the students to provide student centric services on mobile devices. The architecture was developed by using Service Oriented Architecture (SOA) to provide services for collaboration and communication among the students or between students and the teachers. The mobile services are built by integrating MSIS to Twitter, Feed based systems and NTNU email system. The services have the potential to provide students an experience of a virtual environment of class, project work and discussion groups anytime-anywhere. The project has been carried out in accordance with design-science research model over a number of implementation and evaluation iterations. A user-driven evaluation of the MSIS service has been conducted among a diverse group of NTNU students. The utility as well as the usability of the system were evaluated by applying observational and empirical evaluation methods in a real-world environment at the university. The usability test identified few issues with the initial design of services, and received feedback for enhancements. The Mobile Service Acceptance Model (MSAM) has been used to examine the factors that are influential for user adoption of mobile services in the light of this project. The MSAM instrument measures different facets of a mobile information service, such as the perceived usefulness, ease of use, and usage intention. Our findings confirm that the utility of the student centric mobile services are perceived as high, and students would likely benefit from such kind of services. There is no doubt about the great potential for a service like MSIS and it is believed to be a useful addition to the existing systems.
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Kovachev, Dejan [Verfasser]. "Mobile multimedia services in the cloud / Dejan Kovachev." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1054632715/34.
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Backvall, Patrik. "Preschool Evolved : Communication With Preschool Through Mobile Services." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155764.
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Technological advancements in the fields of communication and information sharing and usage are coming forth more and more rapidly. Information technologies are being introduced in fields that traditionally have been quite isolated in the technological sense. While previously not very distinguished by technological standards, the preschools are now in a process of evolution. A new information technology system for expanding communication possibilities between preschools and caregivers is being developed and tested in a pilot project in Stockholm, Sweden. This system, presently called the Preschool Portal, uses existing technologies like computers, mobile phones and the Internet with the aim of easing information access for both caregivers and preschool employees. The core of the system is an Internet portal where information related to participating preschools is stored. The portal provides both parts with functions to retrieve as well as share information and is online-based which means that it can be accessed from any Internet-connected computer. Using surveys and interviews as the main methods this thesis work strives to answer the question of how this previously non-technological workplace will handle the transition to this advanced and highly integrated information technology system. The preschools in focus in this project are used to work mainly with paper notes and lighter document handling on a computer, with information gathered from telephone and face-to-face conversations. It also looks at the relationship between the caregivers and the preschool employees partly to find out how the caregivers will use the system via their mobile phones, partly if and how that will change the way of work for the preschool employees. The results from the work are presented as a prototype for an iPhone application connecting to the Preschool Portal, and valuable knowledge about how non-technologically based workplaces are affected by the introduction of a system like the Preschool Portal.
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Zheng, X. (Xiaosong). "Reference modeling for high value added mobile services." Doctoral thesis, University of Oulu, 2007. http://urn.fi/urn:isbn:9789514285455.
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Abstract
The era of mobile communications and mobile services has begun. The ongoing mobile revolution has dramatically and fundamentally changed our daily lifestyles, and it will continue to do so in a foreseeable future. For the next generation, mobile service end users have more demands for such services. This thesis examines the challenging user perspectives in designing and developing high value added mobile services. The aim of this research is to develop reference models and elicit user requirements for 3G and beyond mobile services in order to improve the quality of mobile services.
This thesis first examines the existing architectures and models for high value added mobile services, followed by the contributions of the thesis. In this thesis, a Cyberworld model, which is a contribution to the WWRF reference modeling initiative and a specification of the WSI reference model, was developed and it serves as a basis for 3G and beyond mobile services design and development. A series of definitions of the Cyberworld model and a roadmap of the enabling technologies were also built up. The emphasis of this part is on how to describe and model user participation in mobile services. For this purpose, a model of the communication element to represent the components of the wireless world was created. Both static and dynamic reference modeling steps were established to better describe and understand user participation in mobile services. The validation was achieved through the CyPhone navigation mobile service. In order to enhance mobile service mobility, personalisation, and security, an ontology based model was developed to extend the Cyberworld model functionalities. The innovative ontology based mobile system will greatly increase service mobility, personalisation and security, thus improving the quality of mobile services. The ontology based model was illustrated and validated using a healthcare mobile service.
A Quality Function Deployment (QFD) approach was adopted in this research in order to elicit, weigh and prioritise actual user requirements and link them to technical design requirements of mobile services. Traditionally QFD is employed in manufacturing industry. This approach is now extended to the mobile service industry for the first time. In this thesis, a detailed step by step QFD approach was proposed for designing high value added mobile services. As a result, the developed mobile services will better meet users' wants and needs which also means that the quality of mobile services will be significantly improved. The QFD approach was validated through a mobile e-learning service and another dedicated healthcare service for senior citizens.
Through development of reference models and examination of user requirements for 3G and beyond mobile services from user perspectives, this thesis contributes to the design and development of high value added mobile services.