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Tran, Hoang-Hai. "Auctions for competitive network providers." Rennes 1, 2012. http://www.theses.fr/2012REN1S014.
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La tarification des réseaux de communication a une longue histoire et un impact sur le développement des réseaux et les services de communication. Dans la littérature, les stratégies de prix sont utilisées par les fournisseurs de réseau pour le contrôle de congestion et la signalisation, la maximisation du profit et l'amélioration des services offerts à leurs clients. L'évolution de l'interconnexion des fournisseurs de réseaux égoïstes devant transférer le trafic des concurrents requiert la mise en place de mécanismes adaptés. Dans cette thèse, nous proposons de définir des mécanismes d'incitation économique pour encourager les ISPs à coopérer afin de créer un réseau efficace. Nous concentrons notre attention sur l'application de mécanismes d'enchères pour résoudre ces problèmes. Dans la littérature, le mécanisme d'enchères VCG a été appliqué aux problèmes d'allocation des ressources en raison de ses propriétés de rationalité individuelle, compatibilité d'incitation et d'efficacité (en termes de maximisation des profits nets de tous les utilisateurs). Le défaut le plus important de VCG est qu'il ne vérifie pas l'équilibre budgétaire pour des enchères double faces. Nous avons montré qu'il y a d'autres questions oubliées dans les travaux précédents et que VCG n'est pas pratique à appliquer à la tarification de l'inter-domaine. Dans cette thèse, nous proposons un algorithme distribué pour l'allocation de ressources sur les chemins basé sur le mécanisme d'enchères. Le mécanisme de tarification proposé est équilibré budgétairement, individuellement rationnel, BGP-compatible, mais relâche légèrement les propriétés de compatibilité d'incitation et d'efficacité. Nous étudions aussi l'application d'un mécanisme d'enchères combinatoires aux opérateurs de réseaux sans fil en concurrence. Nous formulons la décision de "han- dover" (VHD) entre opérateurs pour des clients mobiles par un problème de tarification. La tarification proposée utilise le rapport signal-bruit plus interférences (SINR), la puissance de transmission et le coût monétaire comme critères de décision. Plusieurs mécanismes d'enchères combinatoires sont proposés afin de maximiser le bien)être social, ainsi que des incitations pour les utilisateurs mobiles et les opérateurs à dire la vérité sur leurs valuations et coûtsPricing communication networks has a long history and a strong impact on the development of network technologies and communication services. In the literature, pricing strategies are used by network providers for congestion control and signaling, profit maximization and improved offered services to their customers. The evolution of inter-connected and selfish network providers requiring to forward traffic of others brings mechanism design issues. This thesis aims at defining economics incentives to encourage the ISPs to be cooperative in order to create a working and efficient network. We focus on the application of auction mechanism to solve the problem. In the literature, VCG auctions have been widely applied in resource allocation problems since they have the properties of individual rationality, incentive compatibility and efficiency (in terms of maximizing the net profits of all users). The most important drawback of VCG auctions is that it does not verify budget balance. We have shown that there are other issues forgotten in previous works and that it is not practical to apply VCG auctions to inter-domain pricing. In this thesis, we propose a distributed algorithm for allocating bandwidth over paths based on double-sided auction. The proposed pricing mechanism is strongly budget-balanced, individually rational, BGP-compatible, but relaxes incentive compatibility and efficiency. We also study the application of combinatorial double-sided auctions to competitive mobile wireless network operators. We formulate the vertical handover decision (VHD) strategies between competitive mobile operators and mobile users as a pricing problem. The proposed pricing schemes make use of signal-to-noise-interference (SINR), power transmission allocation, achievable data rates and monetary cost as decision criteria. Several combinatorial double-sided auctions are proposed to maximize the social welfare and to provide incentives to mobile users and mobile operators to be truth telling in terms of valuations or cost
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Chiam, David Tou Wei. "A model for the growth of network service providers." Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/10580.
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Consider a set of points and an associated demand for traffic between each pair of points. In this thesis, we consider the perspective of a notional Network Service Provider (NSP) who has to decide on the connections to build and the demands to satisfy in order to maximize its profits. The NSP makes these decisions based on the demand for connectivity and the constraints on their resources needed to provide the connections. We perform numerical experiments to study the tensions faced by the NSP in its decisions to structure its service network. Through the results generated, we infer how demand, revenue and cost influence the decisions of the NSP.
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Sookavatana, Pipat Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Service Trading Marketplace Network (STAMP-Net): service discovery and composition for customizable adaptive network." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2003. http://handle.unsw.edu.au/1959.4/20439.
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This thesis presents a complete alternative service composition model named Service Trading Marketplace Network (STAMP-Net). The primary concept is to improve overall system scalability and introduce a fair business scheme for customers and providers. STAPM-Net focuses on designing an architecture based on both technical and business aspect. In STAMP-NET, users remain the ability to choose their preference service providers from potential-provider lists, and service providers are able to compete for the requested services that they can handle. For these purposes, STAMP-Net introduce a concept of 'Service Trading Marketplace Mechanism' which facilitates a problem of 'conflict of interest'; 'Indirect Service Discovery' which allows service providers to the learn existing of services being offered by other service providers; and 'Service Subcontract System' which allows service providers to subcontract any missing service to other potential service providers. In addition, this thesis also present monitor techniques, which are used to ensure the quality of services.
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Vlasak, Andrea Lynn 1974. "Integration of third party logistics providers within the distribution network." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/44606.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; in conjunction with the Leaders for Manufacturing Program at MIT, 2001.Includes bibliographical references (p. 65-68).
In its attempt to sustain the growth expectations in an increasingly competitive market, Intel Corporation has invested in a number of new products and services, which differ significantly from its core semiconductor business. In 2000, Intel purchased 12 companies, amounting to an investment value of approximately 6 billion dollars. Associated with these various businesses ventures are new customers, new channels, different product attributes, uncertain demand profiles, and various service requirements, all of which have a direct impact on Intel's strategy for physical distribution. The existing logistics infrastructure is not equipped to optimally distribute the greater product mix and respond to the added complexities. The integration of third party logistics providers into its current distribution network may enhance Intel's ability to respond to the growing needs of the diversified product offerings. This thesis explores the decision to outsource logistics activities. It presents both the financial and non-financial, strategic and operational factors, which affect the decision. The decision framework presented is applied to the current business situation at Intel and an outsourcing strategy, which both addresses the current distribution challenges, and compliments the overall strategy of the corporation, is recommended. The description of the recommended distribution strategy is followed by a discussion of the complications associated with executing the strategy and guidelines for effective supplier management in a logistics context. The decision to outsource is just one of the decisions analyzed in the development of distribution strategies. Studying the strategies utilized by other organizations can enhance the competitiveness of a firm's logistics network. This paper also describes the methodology developed for exchanging logistics information with other companies, and based on the evidence from the specific study conducted by Intel's Planning and Logistics Group, discusses the critical success factors for future external studies.
by Andrea Lynn Vlasak.
M.B.A.
S.M.
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Spring, Neil Timothy. "Efficient discovery of network topology and routing policy in the Internet /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/6985.
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Yang, Weilai. "Pricing Network Resources for Differentiated Service Networks." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5227.
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We developed a price-based resource allocation scheme for Differentiated Service (DiffServ) data networks. The DiffServ framework was proposed to provide multiple QoS classes over IP networks. Since the provider supports multiple service classes, we need a differentiated pricing scheme, as supposed to the flat-rate scheme employed by the Internet service providers of today. Charging efficiently is a big issue. The utility of a client correlates to the amount of bandwidth allocated. One difficulty we face is that determining the appropriate amount of bandwidth to provision and allocate is problematic due to different time scales, multiple QoS classes and the unpredictable nature of users.
To approach this problem, we designed a pricing strategy for Admission Control and bandwidth assignment. Despite the variety of existing pricing strategies, the common theme is that the appropriate pricing policy rewards users for behaving in ways to improve the overall utilization and performance of the network. Among existing schemes, we chose auction because it is scalable, and efficiently and fairly shares resources. Our pricing model takes the system's availability and each customer's requirements as inputs and outputs the set of clients who are admitted into the network and their allocated resource. Each client proposes a desired bandwidth and a price that they are willing to pay for it. The service provider collects this information and produces parameters for each class of service they provide. This information is used to decide which customers to admit.
We proposed an optimal solution to the problem of maximizing the provider's revenue for the special case where there is only one bottleneck link in the network. Then for the generalized network, we resort to a simple but effective heuristic method. We validate both the optimal solution and the heuristic algorithm with simulations driven by a real traffic scenario. Finally, we allow customers to bid on the duration for which the service is needed. Then we study the performance of those heuristic algorithms in this new setting and propose possible improvements.
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Vanberg, Margit A. "Competition and cooperation among internet service providers a network economic analysis." Baden-Baden Nomos, 2008. http://d-nb.info/991114353/04.
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Ebel, Nikos. "The regulation and liberalization of network-based industries a microeconomic analysis of network providers' investment incentives." Hamburg Kovač, 2008. http://d-nb.info/992492653/04.
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Sedell, Daniel. "Network-RTK - A comparative study of service providers currently active in Sweden." Thesis, KTH, Geodesi och satellitpositionering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-179062.
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Network-RTK is a method of relative measuring using GNSS that provides users in alarge area with an easy way obtaining low uncertainties in their measurements. Regularnetwork-RTK does not meet the requirements of the Swedish Transport Administration(STA) regarding its larger and/or more complex projects, leading to the concept ofproject-based network-RTK being introduced in Sweden by the STA, in collaborationwith the network-RTK service provider SWEPOS back in 2004. This concept improvesupon regular network-RTK by decreasing the uncertainties and increasing reliabilitieswithin the project area. SWEPOS has since the collaboration back in 2004 supplied theSTA with project-based network-RTK services.The market is not the same today as it was in 2004 and there are more service providersactive in Sweden. This thesis intends to find out if this new market means that there areother alternatives to SWEPOS with regards to the STA’s requirements for project-basednetwork-RTK. This is done through a technical comparison of the different serviceprovider’s measurement uncertainties and their measurement accuracies as well as acomparison of their surrounding infrastructure and the subjective user experience.Similar studies have been conducted before (Edwards et al., 2010) (Martin andMacGovern, 2012) (Saeidi, 2012), but never in Sweden nor with SWEPOS as one of theservice providers as it is only available in Sweden. Neither have they had a focus onmeasurement uncertainties and accuracies in a project-based network-RTK net. Theyhave all concluded that there were no significant differences between any of the serviceproviders compared, in both the measurement uncertainties and accuracies.For the technical part of this thesis, measurements were conducted at four sites: two atdifferent locations within the area of a former, STA project-site, one within the regularnet and the final site outside the entire net, with the amount of collected data varying forthe different sites. Five different GNSS receivers of different brands were used for themeasurements to make it as general as possible.The results show that there are slight differences in the height uncertainty, but the scopeof this thesis does not permit the full correlation study needed to determine if thesedifferences are significant. There does not seem to be any differences in the accuracies ofthe service provider. Some of the sites with less data collected show contradictoryevidence to this statement, but it is deemed that these deviations are more likely relatedto something other than the service providers, such as human interference or errors.Large differences exist in the user experience and surrounding infrastructure, an areawhere SWEPOS at the moment has a clear lead. This is believed to be due to SWEPOSprimarily being a network-RTK service provider and thus allocating more resources andpersonnel, whilst the other service providers also serve as equipment vendor andmaintainers.Combining the two comparison parts leads to the overall conclusion that with theservice providers in their current state with the requirements of the STA specified intheir current state, only SWEPOS is a viable alternative as a supplier of project-basednetwork-RTK. But this is something that could change with relative ease depending on ifthe other service providers allocate more resources.Nätverks-RTK är en metod för relativ mätning med hjälp av GNSS som ger användare istora områden ett enkelt sätt att förbättra osäkerheterna i sina mätningar. I början av2000 talet då frågan om alternativa lösningar till stomnät på marken aktualiseradesuppfyllde inte tillgängliga nätverks-RTK-lösningar Trafikverkets (TrV) krav påmätningar när det gäller dess större och/eller mer komplexa projekt. Något som leddetill att konceptet projektbaserad nätverks-RTK infördes i Sverige av TrV i samarbetemed tjänsteleverantören SWEPOS 2004. Detta koncept förbättrar vanlig nätverks-RTKgenom att minska osäkerheterna ytterligare och öka tillförlitligheten inom ett mindreprojektområde. SWEPOS har sedan detta samarbete 2004 levererat projektbaseradenätverks-RTK tjänster till TrV.Marknaden är inte samma dag som den var 2004 och det finns fler verksammatjänsteleverantörer i Sverige. Detta examensarbete avser att ta reda på om denna nyamarknad innebär att det finns andra alternativ till SWEPOS med avseende på de kravTrV har på projektbaserad nätverks-RTK. Något som sker genom en teknisk jämförelseav de olika tjänsteleverantörernas mätosäkerheter och deras noggrannheter samt enjämförelse av deras omgivande infrastruktur och den subjektiva användarupplevelsen.Liknande studier har gjorts tidigare (Edwards et al., 2010) (Martin och MacGovern2012) (Saeidi, 2012), men aldrig i Sverige och med SWEPOS som ett avjämförelseobjekten. De har inte heller haft fokus på mätosäkerheter och noggrannheterunder projektbaserade nätverks-RTK förhållanden. De har alla haft samma slutsats: attdet inte finns några signifikanta skillnader mellan de jämförda tjänsteleverantörerna.För den tekniska jämförelsen har mätningar utförts på fyra platser: två inom ettbefintligt TrV projektområde, en i det ordinarie nätet och den sista utanför hela nätet,där den insamlade datamängden varierar för de olika platserna. Fem olika GNSSmottagareav olika märken användes för att göra mätningarna så allmänna som möjligt.Resultaten visar att det finns små osäkerhetsskillnader i höjd, men för att avgöra omdessa skillnader är signifikanta eller ej så skulle en fullständig korrelationsanalys av deolika tjänsteleverantörerna behövas, något som inte ryms inom detta arbete. Det verkarinte heller finnas några signifikanta skillnader i noggrannhet hos tjänsteleverantören.Några av platser med mindre mängd insamlad data uppvisar motsägande resultat, mendetta bedöms bero mer på andra faktorer än tjänsteleverantörer i sig, såsom mänskligpåverkan etc.Användarupplevelsen och tjänsteleverantörernas omgivande infrastruktur uppvisarstörre skillnader, där SWEPOS för tillfället har ett klart övertag. Detta tros bero påSWEPOS främst är en tjänsteleverantör av nätverks-RTK och därmed har merdedikerade resurser och personal, men de andra tjänsteleverantörerna även agerarleverantörer/försäljare av utrustning.En kombination av de två jämförelsedelarna leder till en mer generell slutsats att medalla tjänsteleverantörer i sina nuvarande tillstånd alternativt utan en eventuellomformulering av TrVs krav, är enbart SWEPOS ett alternativ som leverantör avprojektbaserad nätverks-RTK lösningar till TrV. Men detta är något som kan förändrasmed relativ snabbt beroende på om andra tjänsteleverantörerna avsätter mer resursereller om kraven formuleras om.
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Kruger, Liezl-Marie. "Young adults' relationship intentions towards their cell phone network providers / by Liezl-Marié Kruger." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4270.
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Marketers use relationship marketing in order to establish mutually beneficial long-term
relationships with their customers as a means to retain these customers in the
competitive market environment. Relationship marketing should, however, not be used
to target each and every customer as not all customers want to build long-term
relationships with organisations. In order to identify the most profitable customers to
target through relationship marketing, organisations should consider their customers'
relationship intentions to form long-term relationships with them.
The primary objective of this study was to determine young adults' (aged 18 to 25)
relationship intentions towards the South African cell phone network providers they use,
namely Vodacom, MTN or Cell C. This was done by considering the five constructs
used to measure relationship intention, namely involvement, expectations, forgiveness,
feedback and fear of relationship loss. A focus group was used to determine which
features related to cell phone network providers young adults consider when selecting a
cell phone network provider. This data was used to develop a self-administered
questionnaire, which was distributed among respondents studying at the Potchefstroom
Campus of the North-West University in the North-West Provirice. A convenience (non
probability) sampling method was used and a total of 315 respondents participated in
this study. The distribution between the cell phone network providers was Vodacom
(115), MTN (101) and Cell C (99). Initial data analysis revealed that 73% of respondents
had high relationship intentions, while the remainder (26%) had low relationship
intentions of forming long-term relationships with their respective cell phone network
providers.
By means of a factor analysis it was determined that the five relationship intention
factors, namely involvement, expectations, forgiveness, feedback and fear of
relationship loss, were valid and reliable to measure the relationship intentions of
respondents. The results further indicated that respondents with a t"iigh relationship
intention are more involved with thei r cell phone network providers and feared losing
thei r relationships with their cell phone network providers more than those respondents
with a low relationship intention. Furthermore, respondents from the different cell phone
network providers do not view the five factors comprising relationship intention
differently, but they do differ with regards to other factors related to cell phone network providers. It was found that the majority of respondents regard Vodacom (not
necessarily the respondent's cell phone network provider) as the cell phone network
provider with the latest technology, as being the quickest, having the best coverage,
best handsets, coolest image and best service. The majority of respondents regard Cell
C as being the cheapest and MTN as being the most expensive. Results also indicate
that respondents' parents play an important role with regard to the choice of their cell
phone network providers as the majority of respondents' parents initially chose the cell
phone network providers and pay their cellular expenses.
It is recommended that cell phone network providers should target young adults'
parents with a view to gain a foothold in the young adult market. Furthermore, it is
recommended that cell phone network providers should determine how their customers
perceive them as compared with competitors in order to better position themselves and
to improve communication with young adults. Most importantly, it is recommended that
cell phone network providers should identify those young adults with high relationship
intentions (those young adults who are more involved with and fear losing their
relationship with the cell phone network provider more) in order to retain them by
attempting to build long-term relationships with these young adults through dedicated
relationship marketing efforts.
Recommendations for future research include examining relationship intention with
regards to other age groups (such as scholars and adults), other service industries and
other geographical areas. Furthermore, the influence which young adults exert on
decisions concerning cell phone network providers and the influence of parents on
young adults' product and service choices, can be explored in future research by means
of the family decision roles.Thesis (M.Com. (Marketing Management))--North-West University, Potchefstroom Campus, 2010.
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Chan, Ka Tat. "Investigation of a company internal workflow for improvement." access abstract and table of contents access full-text, 2006. http://libweb.cityu.edu.hk/cgi-bin/ezdb/dissert.pl?msc-meem-b21417568a.pdf.
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Thesis (M.Sc.)--City University of Hong Kong, 2006.Title from title screen (viewed on Oct. 5, 2006) "Submitted to Department of Manufacturing Engineering and Engineering Management in partial fulfillment of the requirements for the degree of Master of enterprise technology and management." Includes bibliographical references.
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Channuntapipat, Charika. "Sustainability assurance in practice : evidence from assurance providers in the United Kingdom." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/sustainability-assurance-in-practice-evidence-from-assurance-providers-in-the-united-kingdom(367c6e63-965a-4ba4-b184-355e6d885428).html.
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Sustainability assurance (hereafter ‘SA’) has been a significant area of development in corporate reporting during the last two decades, but one that so far has been subject to limited research. Existing studies in this field have mainly focused on SA opinions, and have tried to understand the characteristics of, and the elements included in, assurance statements, instead of enquiring beyond such outputs to obtain evidence from SA providers themselves. This thesis aims to provide insights into the SA process regarding how decisions in the process are made and what could influence such decisions. It aims to understand what SA practice actually is by examining SA providers’ understandings of the meaning of the practice and the influences that such understandings have on the actual assurance process. Hence, the study focuses on the development of SA practice from the perspective of the assurance providers. It focuses on issues beyond the content of the SA statements to explore the processes leading to the actual delivery of such statements and a wide range of factors that influence the production of such statements and the development of SA practice in general. This study employs a qualitative research approach, using semi-structure interviews as the main data collection method supplemented by various textual data sources. Research participants are SA providers in the UK, including accounting and non-accounting assurance providers. Drawing on the perspective of actor-network theory (ANT), the thesis focuses on the associations involving both human (e.g. assurance providers, reporting organisations, and stakeholders) and non-human (e.g. reporting guidelines, and assurance standards) elements shaping the assurance practice. The theoretical framework based on ANT allows the flexibility in exploring important issues by following the actors, their associations, and their influence on the practice. The findings show that assurance providers’ understandings of the assurance practice vary significantly and that such variation has a major effect on how the assurance practice is conducted. The assurance providers may perceive their roles as independent assurance providers but also adopt other roles to match with the interests and demands of various constituencies. The study shows, in particular, that the providers’ perceived roles vary between what can be termed an ‘independent verifier’, a ‘sustainability consultant’ and a ‘sustainability promoter’, depending on the way in which they place importance on assurance- as against sustainability-related elements of the assurance process. Their different perceptions of their roles influence the internal dynamics of how assurance engagements are conducted. In particular, the study identifies four types of SA engagements, namely ‘social assurance’, ‘integrated assurance’, ‘formative assurance’ and ‘compliance assurance’. Such a categorisation provides a broad-based understanding of the SA as a practice field and the degree of heterogeneity within it. This study provides methodological and empirical contributions by providing evidence on the process associated with SA practice through interviews with different types of organisations providing SA services. Moreover, basing the theoretical framework on ANT highlights the interactions between different actors as a part of the development of SA practice and offers a new perspective to explore the practice and factors influencing its development.
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Jockel, Otto. "The role of third party logistics providers in Europe - A combined network and systems approach." Thesis, Cranfield University, 2002. http://hdl.handle.net/1826/2486.
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Third party logistics is a concept that is widely accepted as an alternative to vertical integration. The degree to which it is applied in practice varies considerably. The focus of this research is the role of TPLPs in existing logistics systems, and how they themselves can influence this. This is influenced by the strategic position with which a TPLP is trusted by a shipper, and to some extent by a TPLP's competence and entrepreneurial behaviour towards logistics management. Logistics competence is sourced externally up to the level at which a shipper recognises this to be advantageous. TPL involvement might be influenced by TPLPs' initiatives towards innovative ideas in logistics management. The objectives of this research were to explore different roles that TPLPs can assume in the management of their clients' logistics systems, and the impact of their contribution on logistics performance. This research aims therefore to provide further and better understanding of third party logistics, and to develop a general framework for evaluating the effects of the logistics competence and entrepreneurial behaviour (with regards to their clients' logistics requirements) of TPLPs on logistics outsourcing, and thus the strategic role assumed by TPLPs. At a scholarly level the prevailing contribution of this research is to create further understanding of the TPL phenomenon by examining it from a new perspective. On a practitioner or managerial level this research adds knowledge about the strategic significance of logistics outsourcing, which is directed at shippers and TPLPs. Existing categories of Third Party Logistics providers could be identified according to different degrees of TPL involvement (or logistics outsourcing). Furthermore a positive relationship between TPL resources and skills and TPL proactive behaviour was empirically verified. It was also found that the degree to which TPL providers are involved in their clients logistics systems is in positive relationships with logistics performance.
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Oliveira, Luciana Pereira. "Future internet architecture to structure and to manage dynamic autonomous systems, internet service providers and customers." Universidade Federal de Pernambuco, 2008. https://repositorio.ufpe.br/handle/123456789/1708.
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Previous issue date: 2008Conselho Nacional de Desenvolvimento Científico e Tecnológico
Diversos trabalhos na área de redes dinâmicas têm sido propostos na literatura com o objetivo de prover à arquitetura da Internet o suporte à mobilidade. O problema dessas redes instáveis na Internet consiste em oferecer um conjunto de mecanismo, tais como endereçamento, gerenciamento da informação e encaminhamento da informação, que suportem informação e entidade (Sistema Autônomo, Provedor de Serviços na Internet e Clientes) móveis. Nesse contexto, alguns trabalhos para arquitetura da Internet têm proposto uma maneira de separar a localização (atualmente o IP) e o nome identificador, devido ao forte relacionamento entre o IP e o nome. Em geral, eles propõem uma abordagem de roteamento na camada overlay para separar essas informações. Outros trabalhos acreditam que este desacoplamento não é suficiente para solucionar os problemas de mobilidade, desde que a dinamicidade gera muitas mensagens de controle e atualizações do vínculo entre o IP e o nome. Por essa razão, os pesquisadores também têm proposto novos modelos para gerenciar a camada overlay. Uma das contribuições deste trabalho é a proposta de uma solução para arquitetura da Internet denominada Stable Society que adota a abordagem de papéis. Um papel é uma unidade funcional que é utilizada para organizar a comunicação. Um importante diferencial da proposta é que além de desvincular o nome e a localização, ela também oferece soluções para os problemas relacionados a estruturação e manutenção da camada overlay. Além disso, este trabalho define quatro papéis: o mensageiro encaminha os dados dentro da sociedade; o guarda é a entidade mais estável para encaminhar mensagens entre as sociedades; o operário armazena informações; e o líder estrutura e gerencia a rede overlay. Reduzindo o escopo para a implementação desta dissertação de mestrado, o mensageiro e o guarda foram considerados como a camada de rede sem distinção de estabilidade, desde que o fornecimento de um mecanismo de gerenciamento do overlay de roteamento foi o objetivo do trabalho. Portanto, como prova do conceito apresentado pela proposta, os líderes e operários foram implementados, porque eles agem de maneira independente de tecnologia de acesso e são fundamentais para solucionar o problema da instabilidade nos processos de armazenamento e descoberta da informação. Como resultado, um novo algoritmo denominado Stable Society model over Distributes Hash Table (SSDHT) foi proposto. Além disso, este algoritmo foi comparado com outras soluções DHT (Chord). Os resultados mostraram que o SSDHT é um bom algoritmo, principalmente quando se aumenta a instabilidade (carga do tráfego, grau de mobilidade e tamanho da rede). Por exemplo, a taxa de mensagens entregue com sucesso foi acima de 90% quando a carga de tráfego, o grau de mobilidade e o tamanho da rede foram variados
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Chen, Sheng. "Future development trends of optical transport network infrastructure an infrastructural framework for metropolitan-based optical transport networks : a field test of a Chinese ISP and a case study of a Chinese electrical power company /." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070822.115714/index.html.
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Ajakaiye, Ojo Iseghohime. "The Role of Logistics Service Providers in the Logistics Firms' Supply Chain." Thesis, Högskolan i Jönköping, Internationella Handelshögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-18576.
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Competition amongst companies in the global market has resulted in increased production of goods and services. Enterprises are now faced with the challenges of shipments of raw materials, spare parts from vendors, and the finished goods to consumers. Logistics companies are springing up to tackle transportation and other logistics problems. There are various logistics companies such as logistics intermediaries, carriers and third party logistics service providers in the market which are in one way or the other competing and at the same time cooperating within the supply chain in order to fulfill their assignments to their customers. Third party logistics service providers are experiencing rapid growth because of the advanced demand of services such as the desire to reduce lead time, inventory management, outsourcing, and a host of other functions. Not much has been written on the logistics firms. Besides, most studies on logistics firms and the third-party logistics providers focus more on such aspects like their skills, services, and their relationships with their customers. The purpose of this thesis is to analyze the logistics service providers’ roles within the logistics firms’ supply chain by identifying how the expected roles are performed. In the frame of reference, the author searched several books and articles that are relevant within the scope of the thesis topic. Both qualitative and explorative data collection methods are used in the thesis and these involve conducting interviews, and reading the accounts of other people concerning the thesis topic. The conclusion shows that logistics service providers are able to perform their roles through vertical and horizontal cooperation with other firms and with other logistics firms respectively. Besides, logistics firms do live up to their roles. Carriers and the logistics intermediary now perform more roles than what people think they do, because networks connection and the urge to remain competitive make them to take up value-added services. Third-party logistics service providers add values for their customers through their value-added services in various ways such as time and place utility including tracking and tracing the goods to ensure that they are delivered.
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Wagner, Andrew T. "The economic consequences of network neutrality regulation." Kansas State University, 2012. http://hdl.handle.net/2097/13598.
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Master of ArtsDepartment of Economics
Dennis L. Weisman
The Internet is a network that consists of content providers and users connected to each other through the communication lines managed by network providers. Network neutrality rules are designed to protect independent content providers from unjust discrimination by network providers. This report explores the economic rationale for net neutrality rules, how the regulation should be enforced, and its potential effects on competition. The report finds that net neutrality encourages competition among content providers by subsidizing content provider access but concentrates the market for network providers by forcing network providers to compete primarily through price competition. It considers this to be a beneficial arrangement for economic growth, but observes that there is a potential for all sides of the market to be subsidized by advertiser fees. It also shows that despite the Federal Communications Commission's heavy involvement with network neutrality rules, these rules are actually based in a long history of antitrust regulation. It concludes, however, that the current regulatory environment is sufficient for enforcing net neutrality rules.
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Mayar, Wahidullah. "The Role of Telemedicine in the Management of Stroke Patients and Knowledge Sharing among Health Care Providers in Afghanistan." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24381.
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Focusing on the potential use of telemedicine among other efforts for better treatment of stroke patients, this study explored the role of telemedicine in the management of stroke patients and knowledge sharing among health care providers in Afghanistan. To this end, fourteen semi-structured interviews were conducted with physicians, specialists, neurologists, and decision makers from the Afghan Ministry of Public Health (MoPH). Actor-network and diffusion of innovations theories provided a theoretical framework for this exploratory qualitative study. The study was intended: 1) to find out about the major challenges and problems associated with managing stroke patients in Afghanistan; 2) to explore the perceptions of Afghan health professionals about the application of telemedicine as a means of improving the delivery of health services for stroke patients in Afghanistan; and 3) to understand the perceived barriers to knowledge sharing and to ascertain the potential role of telemedicine in knowledge sharing among health care providers in Afghanistan. The findings of this study demonstrated that almost all of the participants were optimistic about the potential positive role telemedicine could play in the management of stroke patients and knowledge sharing among health care providers in Afghanistan. Some important existing organisational, socio-economic, geographical, security, and cultural barriers to the management of stroke patients and knowledge sharing among health care providers in Afghanistan were revealed. To the best knowledge of the researcher, there has been no study of this kind conducted in Afghanistan yet; thus, the findings of this study will likely contribute to the development of health communication in the context of Afghanistan, and could likely be used as a resource for future research about the applications of telemedicine in various medical specialities.
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Seo, Deoggyo. "South Korean National Assembly : the role of committee staffers as information providers and network managers in the scrutiny of government law bills." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/27837.
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The aim of this thesis is to investigate the role and impact of the committee staff of the South Korean National Assembly in the scrutiny of government bills. It also explores the factors affecting their role and impact focusing on the scrutiny of government bills. Parliamentary staff globally have not drawn much academic attention with the exception of those in the U.S., and it is difficult to apply the theories and concepts in American studies to staff in the legislatures of other countries due to the peculiarity of legislatures in the U.S. Moreover, previous literature on parliamentary staff has not given much attention to the roles of staff in mediation and negotiation between policy actors. This research sets out the framework consisting of macro-level institutions, network, actors and the interaction between actors, and uses the perspectives of policy network theory and new institutionalism to derive key concepts, in the context of the South Korean National Assembly, on the features of network; the capabilities and orientations of MPs and committee staff members; and historical contexts affecting the evolution of institutions. In order to collect and analyse empirical data, this research conducted qualitative interviews with 38 committee staff members; amendment analysis on 787 amendment opinions in the scrutiny of law bills; and legislative case studies on four cases of the legislative process. The thesis argues that the committee staff provide information and guide the scrutiny; consult with and mediate between policy actors; and play a limited role in setting the items of the subcommittee meetings. Generally speaking, the impact of them is found to be strong, as evidenced through the interview data and amendment analysis. This is because the orientation structures and capabilities of MPs and committee staff members are conducive to MPs’ delegation of detailed scrutiny to committee staff members; staff members’ participation; and MPs’ agreement with them according to the interview data. In addition, political controversy affects the role and impact negatively, but technical complexity affects positively according to the interview data and amendment analysis. These findings are also supported by the legislative case study. The committee staff conducted substantive roles in the scrutiny of uncontroversial bills, but their roles in amending bills were limited to the translation of the agreement between parties in the scrutiny of controversial bills although they specified detailed amendments and conducted scrutiny in the aspects of legal structure and wording in technically complex matters. The contributions of this research are as follows: First of all, it sheds lights on the network managing function of parliamentary staff generally and in Korea in particular in their roles such as consultation and mediation. In addition, it also sheds light on the nature of issue as the factors affecting the role and impact of parliamentary staff differently. Last, but not least, it can be a base of comparative research on the legislative staff through studying non-partisan committee staff. The major limitation of this research is that it does not address whether the findings can be applied to the legislatures of other countries. This limitation is due to the peculiarity of South Korean National Assembly, although it shares some features of the legislative process with those in the U.K. and U.S. But then, this is a major problem with all kinds of comparative social science research and ought not to be an excuse not to engage with these important issues. Thus, the conduct of a comparative research about parliamentary staff of different countries with a consistent framework is suggested as the direction of future studies.
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Raimundo, José Carlos Alves. "Segmentação da rede convencionada." Master's thesis, Instituto Superior de Economia e Gestão, 2012. http://hdl.handle.net/10400.5/4961.
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Mestrado em Finanças (Instituições Financeiras)A disparidade existente entre os prestadores da Rede Convencionada (RC) em vários indicadores inerentes aos serviços médicos prestados a clientes Multicare, dificulta uma melhor eficiência em todo o processo de monitorização de custos realizado pelo Gabinete de Atuariado e Controle (GAC). Este relatório baseia-se na segmentação da RC da Multicare em grupos de prestadores homogéneos, no âmbito da cobertura de Internamento, alinhando-se aos objetivos primordiais da área de estudos estatísticos do GAC. Para tal, recorre-se a uma técnica estatística denominada de Análise de Clusters (AC), permitindo aferir um conjunto de conclusões sobre o comportamento de cada um dos grupos formados. Foram recolhidas 23 720 autorizações de serviços médicos prestados a segurados com coberturas Managed Care (MC) ou mistas, que reportam para um conjunto de 49 prestadores. As variáveis utilizadas resultam da informação dos atos médicos prestados em cada um dos prestadores selecionados. Ao nível da AC foram utilizados dois métodos distintos, primeiramente um hierárquico para definir o número ótimo de clusters a reter e, seguidamente, um não hierárquico com o intuito de otimizar a solução obtida no método anterior. Os resultados alcançados demonstram que existem três agrupamentos de prestadores homogéneos, nos quais dos 49 prestadores selecionados, 36 foram alocados nos mesmos clusters por ambos os métodos. O cluster 1 apresenta uma elevada taxa de ocorrência de cirurgias e valores medianos nas restantes variáveis; o cluster 2 ilustra uma elevada taxa de cirurgias, inversamente ao número de clientes, à quantidade de autorizações em todos os códigos-macro e aos custos médios (por cliente, de atos não empacotados, de cirurgias e de todos os códigos-macro) que apresentam todos eles valores baixos; por último, no cluster 3 agruparam-se Unidades Hospitalares de grande relevância da RC da Multicare, espelhadas na sua generalidade por baixas taxas de cirurgias, elevado número de autorizações e custos médios também elevados.
The disparity in the conduct of the Network Providers on various indicators relating to medical services provided to the Multicare customers, hinders a better efficiency in all the process of costs motorization of the Gabinete de Actuariado e Control (GAC). This report is based in the segmentation of the Multicare's providers network in homogeneous groups of providers, under of the Internment's coverage, aligning to the primary objectives of the area of statistical studies of the GAC. For this, it was used a statistical technique named by Cluster Analysis and it allowed conclude about the behavior of the classified groups. It was collected 23 720 authorizations for medical services provided to insured coverage with MC or hybrid plans, that report for a set of 49 providers. The variables used are the result of the information regarding the medical acts provided for each of the selected providers. Regarding the Cluster Analysis it was used two different methods. The first one hierarchical to define the optimal number of clusters to retain, and then one non-hierarchical in order to optimize the solution obtained by the previously method. Results show that there are three homogeneous groups of providers, in which of the 49 providers, 36 were allocated in the same cluster by both methods. The cluster 1 has a high rate of surgeries and median values in the remaining variables. The cluster 2 shows a high rate of surgeries inversely to the number of customers, to the amount of permits in all macro-codes and to the average costs (per client, of acts not packaged, surgeries and all macro-codes). Finally, the cluster 3 include the Hospital Units of great relevance to the RC of Multicare, in general characterized by low rate of surgeries, high numbers of authorizations and average costs also high.
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Dozza, Davide. "La responsabilità dei social network nella diffusione della disinformazione online." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24973/.
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L'elaborato vuole essere una lente di ingrandimento sulla responsabilità delle piattaforme social, in particolare Facebook e Twitter, nel propagare e diffondere disinformazione.
Prima di vedere da vicino il ruolo dei social network, viene effettuata una panoramica sulla normative vigenti che disciplinano questi networks.
Etichettati dalle regolamentazioni come Internet Service Provider, viene analizzato il loro fittizio ruolo neutrale online e le loro responsabilità nel momento in cui un utente carica all’interno di questi informazioni illecite, distinguendo la legislazione europeo con quella statunitense.
Per comprendere dove nasce il problema della disinformazione online vengono poi presi in esame una serie di casi dove la propagazione di informazioni illecite a contribuito alla modifica delle percezione della realtà da parte degli utenti di queste piattaforme.
Viene poi fatta un’analisi più profonda sul ruolo dei Social Network nella diffusione di notizie riguardanti il Covid-19, e partendo da questo, viene visionato uno studio su come combatterne la propagazione. Studio che se applicato, potrebbe essere espanso per diminuire in generale tutte le fake news e i discorsi d’odio, senza però limitare la libertà di parola degli utenti.
In conclusione, si evince come ad oggi ci si affidi sostanzialmente ad una auto regolamentazione da parte di queste piattaforme, non essendo le normative aggiornate ed in grado di compiere atti decisi nei loro confronti.
Ad ogni caso, qualsiasi sia la fonte della disinformazione, online o offline, questa va affrontata non solo con le regolamentazioni, ma sopratutto attraverso politiche volte all’educazione e responsabilizzazione dei cittadini, nonché con un’azione tesa ad alimentare il pluralismo informativo.
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Dietrich, David [Verfasser]. "Multi-provider network service embedding / David Dietrich." Hannover : Technische Informationsbibliothek (TIB), 2016. http://d-nb.info/109909643X/34.
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Harvesf, Cyrus Mehrabaun. "The design and implementation of a robust, cost-conscious peer-to-peer lookup service." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26559.
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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.Committee Chair: Blough, Douglas; Committee Member: Liu, Ling; Committee Member: Owen, Henry; Committee Member: Riley, George; Committee Member: Yalamanchili, Sudhakar. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Fleming, Elaine. "Provider Networks in Health Care Markets." Thesis, Boston College, 2003. http://hdl.handle.net/2345/1807.
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Thesis advisor: Peter GottschalkThesis advisor: Thomas McGuire
Thesis advisor: Donald Cox
Does managed care send expectant mothers to hospitals they would choose even if their choice of hospital was not limited? I find that Medicaid managed care patients are redirected to hospitals that enrollees of more generous insurance payers with the same personal characteristics do not go to. However, Medicare managed care enrollees do not face an increased risk of having a cesarean delivery at the hospital they attend, which is interpreted as evidence that they are redirected to high quality hospitals
Thesis (PhD) — Boston College, 2003
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Economics
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KrugerKruger, Liezl-Marié Liezl-Marié. "The influence of relationship intention on satisfaction, loyalty and retention following service recovery in the cellular industry / Liezl-Marié Kruger." Thesis, North-West University, 2014. http://hdl.handle.net/10394/11488.
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It is common practice for service providers, such as cell phone network providers, to utilise relationship marketing strategies in an effort to retain their customers and thereby to increase profitability. Customers with relationship intentions are willing to respond to such efforts while other customers will refrain.
Service failures negatively impact relationship marketing efforts and thus complicate service providers’ relationship-building efforts. Therefore, service providers endeavour to restore customers’ post-recovery satisfaction and loyalty through service recovery efforts to retain their customers. However, the influence that customers’ relationship intentions have on this process has not been considered. Previous research on relationship intention in South Africa focussed only on developing a valid and reliable relationship intention measurement scale. For this reason, the primary objective of this study was to determine the influence of relationship intention on customer satisfaction, loyalty and retention following service recovery within the cellular industry. Supporting the primary objective, a model depicting the influence of respondents’ relationships intentions on satisfaction, loyalty and retention following service recovery was developed. Furthermore, a model depicting the interrelationships of the relationship constructive dimensions of the service recovery process uncovered during this study was also developed.
Through non-probability convenience sampling of adults 18 years and older (residing in Johannesburg and the surrounding residential suburbs) who have used a cell phone network provider for three years or longer, 605 respondents completed interviewer-administered questionnaires. Demographic and patronage information, together with respondents’ relationship intentions, attitudes towards complaining, customers’ complaint behaviour, expectations of service recovery, perceived service recovery as well as satisfaction, loyalty and retention following service recovery, were obtained.
Results indicated that no associations exist between respondents’ levels of relationship intention and their relationship lengths, as well as whether they had contractual agreements with their cell phone network providers. It is therefore recommended that instead of using relationship length or contractual agreements, cell phone network providers should use customers’ relationship intentions to identify customers for relationship marketing purposes. Findings from this study furthermore include that respondents’ relationship intentions influence their propensities to complain, as well as the likelihood that they will voice a complaint regarding dissatisfactory service delivery. It is therefore recommended that cell phone network providers use the opportunity to identify customers with relationship intentions through customers’ complaint behaviour.
This study found that respondents’ relationship intentions influence both their expectations of cell phone network providers to take service recovery action, as well as their perceptions of service recovery. Respondents’ relationship intentions also positively influence their satisfaction, loyalty and retention following service recovery. Based on these findings, it is recommended that cell phone network providers should always take corrective action following service failures (such as billing errors in this study), preferably by including at least an acknowledgement, apology, explanation and rectification of the problem as part of the service recovery efforts. Such a combination of service recovery efforts will increase the satisfaction, loyalty and retention of customers with higher relationship intentions.
From the results it can be concluded that customers’ relationship intentions influence their behaviour with regard to propensity to complain, voicing, expectations of service recovery action, perceptions of service recovery, as well as satisfaction, loyalty and retention following service recovery, when service failures occur. The proposed model developed from these findings results in the recommendation that cell phone network providers should view the service recovery process as an interrelated process influenced by customers’ relationship intentions. Cell phone network providers should note that customers with higher relationship intentions will attempt to salvage the relationship when service failures occur, which contributes to their satisfaction, loyalty and retention following service recovery.
This study contributes to establishing relationship intention theory by confirming the positive influence of customers’ relationship intentions on constructive behaviour when service failures occur. Moreover, practical recommendations concerning cell phone network providers’ response to billing errors are proposed. Future research should address the methodological limitations of this study by using probability sampling, and data should be collected from all South African provinces. Real-time service failures should be considered as opposed to the scenario-based approach used in this study. Important influences on customer behaviour when service failures occur, such as the perceived severity of service failure, service failure type, perceived justice and attributions, should also be considered with regard to their influence on the constructs of this study. Lastly, the antecedents of or differences with regard to customers’ relationship intentions based on personality, generational cohort or population group deserve further attention to establish relationship intention as study field within the domain of relationship marketing.PhD (Marketing Management), North-West University, Potchefstroom Campus, 2014.
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Bonada, i. Cruells Eduard. "Building ethernet connectivity services for provider networks." Doctoral thesis, Universitat Pompeu Fabra, 2012. http://hdl.handle.net/10803/85413.
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Network providers are motivated to deploy Ethernet in their infrastructures. However, this represents a new application for Ethernet technology that leads to new requirements. In Ethernet networks, the Rapid Spanning Tree Protocol (RSTP) creates an active tree on top of the physical topology to avoid potential loops and allows the bridge functionalities to work properly. However, there are some implications of using RSTP to prune the physical topology into an active tree: unused links and sub-optimal paths. In addition, RSTP suffers count-to-infinity and takes too long to recover from critical failures. In this thesis we propose a complete solution based on RSTP extensions that addresses the shortcomings. We design and evaluate two extensions: RSTP-Conf to provide quick recoveries and RSTP-SP to operate with optimal path communications.Els proveïdors de xarxa estan motivats per implementar Ethernet en les seves infraestructures. No obstant, això representa una nova aplicació per Ethernet que comporta nous requeriments. En les xarxes Ethernet, el protocol de Rapid Spanning Tree (RSTP) crea un arbre actiu per evitar cicles i permetre que les xarxes Ethernet funcionin correctament. Hi ha però algunes implicacions de l'ús de RSTP per transformar la topologia física en un arbre actiu: alguns enllaços no utilitzats i la creació de rutes sub-òptimes. A més, RSTP pateix count-to-infinity i tarda massa temps per recuperar-se de caigudes crítiques. En aquesta tesi es proposa una solució completa basada en extensions d’RSTP que aborda les seves deficiències. Dissenyem i avaluem dues extensions: RSTP-Conf per proporcionar una ràpida recuperació i RSTP-SP per operar amb comunicacions per camins òptims.
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Ben, Houidi Zied. "Scalable routing in provider provisoned virtual private networks." Paris 6, 2010. http://www.theses.fr/2010PA066611.
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Les entreprises ont souvent des sites dispersés dans des endroits éloignés et qui ont besoin de communiquer. Au lieu de construire leur propre infrastructure de communication, la plupart des entreprises aujourd'hui, préfèrent acheter un service de réseau privé virtuel (VPN) à un fournisseur de services. Le fournisseur de service VPN est responsable de réaliser le routage afin d'interconnecter les différents sites des entreprises. Dans cette thèse, on fait d'abord un effort pour unifier la vision du routage dans les réseaux privés virtuels fournis par un opérateur. En particulier, on s'intéresse de plus près à la technologie la plus répandue, BGP MPLS IP VPNs, pour réaliser ce besoin. On étudie les limites de cette technologie en se basant sur des données de routage récoltées sur le réseau d'un grand opérateur VPN. Ensuite, grâce à une étude expérimentale sur des routeurs de différents constructeurs, on explique et on aide à dépasser une de ces limites, à savoir la lenteur des transferts de table de routage BGP. Enfin, nous démontrons que le standard actuel n'est pas bien adapté pour servir les besoins du routage VPN tel qu'on l'a définit dans cette thèse et on propose un nouveau protocole pour le remplacer.
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Abrar, Mirza Kashif, and Imran Pervaiz. "Reliability and Load Handling Problem in Internet Service Provider’s Network." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4228.
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This thesis puts forward a new solution to provide the reliable network to the Internet Service Provider (ISP). This study mainly focuses on the ISPs network to provide reliability and the load balancing. It offers a guide line for the best reliable solution to the ISPs, individual organizations or other types of service providers which are engaged in providing reliable communications to their subscribers. These reliable services may be real time communications which include weather forecasts, tracking systems, online Internet protocol TV (IPTV) programs and many other ISPs services which are totally depend on the reliable network.
With the appearance and expansion of Internet subscribers all over the world, ISPs services are becoming more popular. The rapid increase of connection-demand and highly traffic network is the main reason behind the need to scale reliable network. To offer better solutions, a new theoretical and practical approach should be considered that can cover the reliable network.
The suggested network structure monitors the links, spreads the network traffic with multiple devices and takes a backup (redundant) link automatically when changes occur in the network topology. In order to support the redundancy, load balancing and reduce the failover time, the hot standby routing protocol (HSRP) is implemented on the suggested network. As we have analyzed that in any network, scalability bringing to raised the network traffic broadcast issue. Broadcast storms can be prevented by setting threshold values of traffic-filters. The threshold level helps to control broadcast traffic in networks.
With regard to suggested solutions, it is necessary to observe the limitations and advantages of the recommended reliable network structure. Therefore, this research will include the advantages and limitations of the techniques used to offer ISP services such as scalability, security and IPv6.
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Zhang, Xian. "Network-provider-independent overlays for resilience and quality of service." Thesis, Queen Mary, University of London, 2011. http://qmro.qmul.ac.uk/xmlui/handle/123456789/2443.
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Overlay networks are viewed as one of the solutions addressing the inefficiency and slow evolution of the Internet and have been the subject of significant research. Most existing overlays providing resilience and/or Quality of Service (QoS) need cooperation among different network providers, but an inter-trust issue arises and cannot be easily solved. In this thesis, we mainly focus on network-provider-independent overlays and investigate their performance in providing two different types of service. Specifically, this thesis addresses the following problems: Provider-independent overlay architecture: A provider-independent overlay framework named Resilient Overlay for Mission-Critical Applications (ROMCA) is proposed. We elaborate its structure including component composition and functions and also provide several operational examples. Overlay topology construction for providing resilience service: We investigate the topology design problem of provider-independent overlays aiming to provide resilience service. To be more specific, based on the ROMCA framework, we formulate this problem mathematically and prove its NP-hardness. Three heuristics are proposed and extensive simulations are carried out to verify their effectiveness. Application mapping with resilience and QoS guarantees: Assuming application mapping is the targeted service for ROMCA, we formulate this problem as an Integer Linear Program (ILP). Moreover, a simple but effective heuristic is proposed to address this issue in a time-efficient manner. Simulations with both synthetic and real networks prove the superiority of both solutions over existing ones. Substrate topology information availability and the impact of its accuracy on overlay performance: Based on our survey that summarizes the methodologies available for inferring the selective substrate topology formed among a group of nodes through active probing, we find that such information is usually inaccurate and additional mechanisms are needed to secure a better inferred topology. Therefore, we examine the impact of inferred substrate topology accuracy on overlay performance given only inferred substrate topology information.
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Hsiao, Chih-Wen, David Turner, and Keith Ross. "A secure lightweight currency service provider." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2594.
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The main purpose of this project is to build a bank system that offers a friendly and simple interface to let users easily manage their lightweight currencies. The Lightweight Currency Protocol (LCP) was originally proposed to solve the problem of fairness in resource cooperatives. However, there are other possible applications of the protocol, including the control of spam and as a general purpose medium of exchange for low value transactions. This project investigates the implementation issues of the LCP, and also investigates LCP bank services to provide human interface to currency operations.
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Chouhan, Pushpinder Kaur. "Automatic Deployment for Application Service Provider Environments." Lyon, École normale supérieure (sciences), 2006. http://www.theses.fr/2006ENSL0375.
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The objective of the thesis is to improve the performance of a NES so as to use these environments efficiently. The very first problem is related to the applications scheduling on the selected servers. We have proposed and experimentally proved that the deadline scheduling with priority along with fallback mechanism can increase the efficiency of a NES. Another important factor that influences the efficiency of the NES environments is the mapping style of the environment's components on the available resources. We have shown theoretically that the optimal deployment on cluster is a Complete Spanning d-ary tree. Considering heterogeneous resources we presented a deployment heuristic, as finding the best deployment among heterogeneous resources is NP-complete. Finally, we gave a mathematical model that can analyze an existing deployment and can improve the performance of the deployment by finding and then removing the bottlenecks. Presented algorithms and heuristics are validated by implementing them to DIET, on different sites of Grid'5000L'objectif principal de cette thèse vise l'amélioration de l'utilisation des NES afin d'employer ces environnements de façon efficace. Le premier problème illustrant l'utilisation des NES est lié aux applications utilisant des serveurs dédiés. Nous avons montré expérimentalement l'impact positif en terme de charge globale d'un ordonnanceur combinant échéances d'exécution et un mécanisme de priorité. Cette première étude sur l'ordonnancement nous a conduit à nous intéresser à un autre facteur important lié à l'efficacité des NES, le déploiement des composants de l'environnement sur les ressources disponibles. Dans le cadre de NES hiérarchique nous avons notamment démontré que le déploiement optimal dans un cadre homogène est un Complete Spanning d-ary arbre. Dans le cas de ressources hétérogènes, le problème étant NP-complet, nous fournissons des heuristiques visant à fournir le meilleur arbre de diffusion des requêtes. Nous proposons un modèle mathématique afin d'analyser un déploiement existant et d'améliorer ce dernier par détection des goulots d'étranglement. Les algorithmes et heuristiques présentés dans cette thèse ont été validés expérimentalement en utilisant l'intergiciel DIET sur la plate-forme Grid'5000
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Fogel, Johan. "IP version 6 in larger city networks and at Internet service providers." Thesis, Mälardalen University, Mälardalen University, Mälardalen University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-7479.
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Since the 90ies a bunch of problems and flaws in the old Internet Protocol version four has occurred.The biggest problem is the extinction of addresses which will come soon, soon in the matter of theclassic “wolf is coming” matter, but as in the fairy tale the wolf will finally come. When this will happenis unknown, but not many believes it won’t. Carl-Henrik Swanberg CEO for Ericsson once said that year2020 there will be 50 billion mobile units connected to internet. Considering there is maximum 4 billionaddresses in IPv4 the needs for more addresses will be significant. The solution of this is the version sixof Internet Protocol released in middle of the 90ies. This thesis mentions a lot of the problems with theold version and tries to make a good explanation of the benefits and possibilities that lies within thenew. It also contains a larger amount of information on the protocols that lies within this, like newversion of OSPF, the extensions of BGPv4 called multiprotocol BGP (MP-BGP) and new things likenetwork discovery protocol (NDP). The later chapter is about the planning of an implementation atMälarenergi City Network and the implementation at the internet service provider MDFnet whichnowadays runs IPv6 in their core and office network.
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Rosenbaum, Gustav Filip Computer Science & Engineering Faculty of Engineering UNSW. "Providing resilient quality of service connections in provider-based virtual private networks." Awarded by:University of New South Wales. School of Computer Science and Engineering, 2005. http://handle.unsw.edu.au/1959.4/25989.
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This thesis focuses on efficient provisioning of resilient Virtual Private Network (VPN) services. It first confirms the intuition that network resources can be more efficiently utilized when resilience mechanisms are implemented by a network provider in the physical network than by its VPN customers in their VPNs. Next, a Multiprotocol Label Switching-based programmable VPN architecture is presented that delivers virtual links as resilient quality of service (QoS) connections and virtual sites. Virtual sites allow customers to implement functionality like customized routing and content adaptation ???in the cloud???, as opposed to the current network model where all functionality is implemented at the network edge. To provision a resilient QoS connection, two paths need to be computed from the ingress to the egress nodes, such that both paths meet the given QoS constraints. Two different frameworks have been proposed in the literature to compute resilient QoS connections when the QoS constraints are bandwidth and end-to-end delay. They both use a preprocessing step whereby either all links with less residual capacity than the given bandwidth constraint are pruned, or the given end-to-end delay is converted to an effective bandwidth. The frameworks thus reduce the problem to one with only a single constraint. We argue in this thesis that these frameworks individually lead to poor network utilization and propose a new framework where both constraints are considered simultaneously. Our framework exploits the dependency between endto- end delay, provisioned bandwidth and chosen path through using the provisioned bandwidth as a variable. Here, two link-disjoint paths are computed together with their respective minimum bandwidths such that both the bandwidth and end-to-end delay constraints are satisfied. Given our framework we first propose a new generic algorithm that decomposes the problem into subproblems where known algorithms can be applied. Then we propose two new linear programming (LP) formulations that return the two paths and their respective bandwidths such that they have the minimum combined cost. To make our framework applicable in a production environment, we develop two new algorithms with low run times that achieve even higher network performance than their LP formulation counterpart. These algorithms systematically use an algorithm that computes non-resilient QoS connections. As no algorithm for computing nonresilient QoS connections with sufficiently low run time has been proposed in the current literature we develop two new algorithms and their respective heuristics with a run time comparable to Dijkstra???s shortest-path algorithm. Our simulations show that exploiting the dependency between end-to-end delay, provisioned bandwidth and chosen path can significantly improve the network performance.
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Blendin, Jeremias. "Reliable Network Services in Future Internet Service Provider Networks: Reliable and Efficient Control Plane Applications for Virtualized Data Planes in Software-Defined Networking." Phd thesis, Jeremias Blendin, 2019. https://tuprints.ulb.tu-darmstadt.de/8387/1/2019-01-15_Blendin_Jeremias.pdf.
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Driven by highly efficient over-the-top content providers, traffic on the Internet is increasing and puts pressure on Internet service providers (ISPs) to increase their efficiency as well. A promising approach to increase the efficiency of ISP networks is software-defined networking (SDN). SDN achieves this by separating the control from the data plane through a network protocol and thereby enabling increased automation and resource efficiency. However, today’s SDN-based control planes, consisting of control plane applications and an SDN controller to coordinate the data plane access, do not meet the reliability requirements for services in ISPs networks.
With SDN, network services consist of multiple control plane applications combined in a single control plane. The control path in data plane elements is responsible for processing SDN protocol messages to configure the packet processing pipeline, termed data path. Today’s SDN controller designs do not virtualize the control path adequately, i.e., the effects of messages from different applications are not sufficiently isolated. Thereby, misbehaving low priority applications can block the control paths for essential high priority applications in ISP networks such as the network fabric. This lack of isolation can lead to control plane applications to fail unexpectedly and prevent the whole control plane from operating reliably.
To this end, we introduce a novel, systematic resource-oriented approach to characterize the control paths in SDN data planes as well as a virtualization design for throughput aspects of control paths to increase the reliability among control plane applications. Based on these findings, we analyze the requirements of applications to operate on virtualized data planes. Local bottlenecks that only affect a single data plane element can be mitigated by shifting load to a different element. We apply this approach to our network function chaining design and investigate its effectiveness and provide insights on how the application should decide on the specifics of the mitigation process. Global control path bottlenecks affect a complete area of an ISP network. We analyze the interaction pattern that our novel Adaptive Software-Defined Multicast (ASDM) and Adaptive Bit-Index Software-Defined Multicast (ABSDM) designs require to identify such a bottleneck. Furthermore, we show how a global packet matching memory bottleneck can be mitigated by shifting the applications’ resource usage from matching memory to data rate. We demonstrate the effectiveness of the ASDM application for mitigating control path resource bottlenecks and thereby making it reliable.
In this thesis, we close gaps in the virtualization of control paths that affect both SDN controllers and control plane applications. Thereby, we enable reliable SDN controllers and propose designs for reliable control plane applications to deliver SDN-based network services in ISP networks.
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Sanchez, Aaron. "Internet service provider network evolution in the presence of changing environmental conditions." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Mar/10Mar%5FSanchez.pdf.
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Thesis (M.S. in Operations Research)--Naval Postgraduate School, March 2010.Thesis Advisor(s): Alderson, David L. Second Reader: Carlyle, W. Matthew. "March 2010." Description based on title screen as viewed on April 23, 2010. Author(s) subject terms: Internet Service Provider, traffic engineering, network provisioning, network design, network topology, demand matrices Includes bibliographical references (p. 87-89). Also available in print.
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Bury, Sara Elizabeth. "Reconciling community resource requirements in user provided networks." Thesis, Lancaster University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618556.
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In recent times, broad band Internet connectivity has become something presumed accessible to all, often shared throughout the home and between multiple users and devices. Despite the proliferation of online services this perceived ubiquity is unfortunately false, many are still unable to receive high quality Internet access within their homes, due to infrastructure restrictions or geographical problems. One solution is through the deployment of community networks to share Internet access, initiated, designed, and managed by ordinary people with little or no technical background. This thesis takes an interdisciplinary approach to understanding the challenges faced by the users of such networks, and emphasises the importance of user focussed techniques when designing network management solutions for community settings. It investigates the ways in which communal networks can be improved by encouraging more formalised resource sharing, and how users can be aided to better understand their network usage through the design and implementation of an appropriate system.
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Fattam, Nejib. "Le rôle des réseaux sociaux dans la construction d’une capacité de coordination au sein des chaines logistiques : Le cas du 4PL." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM2030.
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Plusieurs facteurs importants interviennent dans la dynamique concurrentielle des chaînes logistiques, à savoir les caractéristiques structurales et relationnelles. Nous optons dans ce travail doctoral pour l'étude des registres relationnels afin de comprendre le rôle des réseaux sociaux dans la construction d'une capacité de coordination au sein des chaines logistiques. Le champ d'investigation est celui du prestataire logistique de dernière génération dénommé 4PL, dont le métier consiste à concevoir et à orchestrer des systèmes logistiques sans pour autant posséder d'actifs matériels. Afin de faire la lumière sur cette problématique, nous mobilisons trois cadres d'analyse, à savoir le management inter-organisationnel, l'approche par les réseaux sociaux et la prestation logistique. La démarche empirique s'est appuyée sur l'analyse du discours de personnes évoluant dans des entreprises ayant mis en oeuvre une prestation 4PL. Les résultats de notre recherche doctorale soulignent qu'il faut tenir compte de valeurs aussi bien économiques que sociales, comme la confiance et les liens interpersonnels, pour dynamiser les relations inter-organisationnelles. Ces valeurs sociales facilitent le travail de coordination du 4PL au sein des chaînes logistiques et légitiment son pilotageSeveral important factors are involved in the competitive dynamics of supply chains: namely the structural and relational characteristics. In this doctoral research we choose to use the relational register in order to understand the role of social networks in building coordination capacity within supply chains. The field of investigation is the Fourth Party Logistics (4PL), whose job is to design and orchestrate logistics systems without ownership of physical assets. To shed some light on this issue we engage three analytical frameworks: the inter-organizational management, the social networks paradigm and logistics services. The empirical approach was based on discourse analysis of people operating in 4PL companies. The results of our study highlight that we must rely on economical as well as social values, such as trust and interpersonal ties, in order to maintain and boost inter-organizational relationships. These social values facilitate 4PL's coordination within supply chains and legitimize its control
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Štěpán, Marek. "Mobile virtual network operator as a new type of a telecommunication services provider." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-142195.
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The primary objective of the master's thesis is to identify and to characterize following action steps, which lead to establish a virtual network operator as a new start-up company. Firstly, a virtual operator is characterized from a technical point of view and as an innovation. Czech telecommunication market is compared to foreign markets by its price level. The power of market competitors was described and market gaps were identified. A project founding a virtual network operator was made to support the main objective of the thesis. General action steps were identified and commented after the project part of the thesis.
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Golany, Yanai S. "Enhancing service providers reliability by mitigating supply chain risk : the case of telecommunication networks." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90782.
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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2014. In conjunction with the Leaders for Global Operations Program at MIT.Thesis: S.M., Massachusetts Institute of Technology, Engineering Systems Division, 2014. In conjunction with the Leaders for Global Operations Program at MIT.
Appendix printed landscape. Cataloged from PDF version of thesis.
Includes bibliographical references (pages 48-49).
Service providers rely on the continuity of their service to sustain their businesses. While at first glance it may seem that service providers are not as dependent on their supply chain as product companies are, a closer look of some relevant systems shows that a stable and resilient supply chain is a key for both maintaining service and growing it. A wireless network provider which does not have spare parts in place to maintain existing cell sites will see an increase in outage duration and, thereby, customer churn. A cable/satellite service provider which does not have the equipment at the right place and in time to expand to a new market will see competitors capturing customers. In order to eliminate or at least mitigate these types of business risks for service providers, a transformation of the Time to Recovery (TTR) / Time to Survive (TTS) framework is shown to fit the service domain. TTR represents the time it takes for a supply chain system to recover from a disrupted supplier. TTS represents the time a supply chain system can continue to operate while its sources of supply are disrupted. The key metric which is introduced is value of service, which allows us to measure the actual lost value as a result of service disruptions.
by Yanai S. Golany.
M.B.A.
S.M.
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Bjarnesen, Mariam. "From perpetrator to protector? : post-war rebel networks as informal security providers in Liberia." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/from-perpetrator-to-protector-postwar-rebel-networks-as-informal-security-providers-in-liberia(7534619b-6619-4592-9863-de5aeb5f23b3).html.
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The dismantling of rebel structures at the end of civil war is often considered to be one of the most important aspects of a successful transition to peace. Combatants are expected to lay down their weapons, but also to abandon their wartime networks. Yet, peace agreements and subsequent Disarmament Demobilisation and Reintegration (DDR) processes do not automatically, or necessarily, destroy rebel networks. In Liberia such structures have lingered since the war came to an end in 2003 and networks of ex-combatants are still active, though maintained and mobilised for new purposes. The security political situation in Liberia, with weak formal security institutions and a history of predatory behaviour, has created an environment where informal initiatives for security and protection are called upon. In such an environment informal security groups have a natural platform. Based on original interview material and findings from fieldwork this thesis examines how post-war rebel networks are organised and operate in the informal security arena, while describing the rationale behind these lingering features of war. By doing so this thesis sheds light on how the adaptive capacity of former rebel soldiers is utilised by various Liberian actors, and the risks, but also possible positive outcomes, of such a development. This dissertation follows individuals, former rebel commanders in particular, in post-war rebel networks from the time of war to 2013. We will see them, and ex-combatants around them, mobilised as ‘recycled’ warriors in times of regional wars and crisis, as vigilantes and informal security providers for economic and political purposes. Yet, we will also meet them when there are no specific event ex-combatants could be mobilised to fully examine the relevance of post-war rebel networks and ex-combatant identity in contemporary Liberia. In the conclusions basic underlying aims and purposes with the processes of demobilisation and reintegration are challenged. And as this thesis finds, one might even argue that these ex-combatants have succeeded in reintegrating themselves due to, not despite, the fact that they have not been demobilised.
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Brown, Johan, Brokås Alexander Gustafsson, Niklas Hurtig, and Tobias Johansson. "Designing and implementing a small scale Internet Service Provider." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-7437.
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The objective of this thesis is to design and implement a small scaleInternet Service Provider (ISP) for the NetCenter sub department atMälardalen University. The ISP is intended to give NetCenter a networkseparate from the University’s network, providing them with a moreflexible environment for lab purposes. This will give their students anopportunity to experience a larger backbone with Internet accessibility,which has not been previously available. At the same time it will place theteachers in control of the network in the NetCenter lab premises.The network is designed with a layered approach including an Internetaccess layer, a larger core segment and a distribution layer with aseparated lab network. It also incorporates both a public and a privateserver network, housing servers running e.g. Windows Active Directory,external DNS services, monitoring tools and logging applications. TheInternet access is achieved by peering with SUNET providing a full BGPfeed.This thesis report presents methods, implementations and results involvedin successfully creating the NetCenter ISP as both a lab network and anInternet provider with a few inevitable shortcomings; the most prominentbeing an incomplete Windows Domain setup.
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Dhamdhere, Amogh. "Provider and peer selection in the evolving internet ecosystem." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28230.
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Thesis (M. S.)--Computing, Georgia Institute of Technology, 2009.Committee Chair: Dovrolis, Constantine; Committee Member: Ammar, Mostafa; Committee Member: Feamster, Nick; Committee Member: Willinger, Walter; Committee Member: Zegura, Ellen.
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McCampbell, Darcey. "Provider Perceptions of Ableism and Social Support Networks in the Healthcare Setting." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5667.
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The objective of this study is to investigate ableism and social support networks in the healthcare setting. Social support networks play an important role in combating emotional distress in healthcare. They provide disabled patients a method for defending against the negative effects of ableism among other stressors. By definition, ableism refers to perceptions that disability is abnormal and undesirable. Ten healthcare providers in central Florida (i.e., in nursing homes, rehabilitation centers, and primary care offices) were interviewed, using in-depth face-to-face qualitative interviewing. Participants were asked questions relating to the effects of ableist language on patients with disabilities as well as the role of social support networks in combating related stress. Throughout the process of data analysis, five major themes arose as most relevant to the research questions proposed: (1) Traditional Social Support, (2) Online Networks as a Source of Informational Support, (3) Concerns about Ableist Language, (4) External Sources of Patient Social Support, and (5) Accommodation and Accessibility. Results indicated a strong preference for traditional social support, as opposed to online support. Traditional social support is offered through accommodation of caregivers, availability of social workers, and creation of support groups. Benefits of online support networks are viewed mainly in terms of fulfilling the informational needs of patients with disabilities. Additionally, while some accommodations for patients with disabilities were described, these dealt primarily with alterations to the physical environment. Results showed a lack of attention paid to ableism in the healthcare field, particularly instances occurring in communication practices. Overall, there is room for improvement in the healthcare field concerning accommodations for patients with disabilities.M.A.
Masters
Communication
Sciences
Communication; Interpersonal Communication
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Sabot, K. "The use of social network analysis to study health care provider advice and performance." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2018. http://researchonline.lshtm.ac.uk/4647004/.
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Introduction: Social network analysis quantifies and visualises communication pathways between actors. This thesis focuses on the application of social network analysis methods to explore healthcare worker professional communication and performance by conducting a systematic review and a network study in Ethiopia. Paper 1: The systematic review analysed what social network methods have been used to study professional communication and performance among healthcare providers. Ten databases were searched from 1990 through April 2016, yielding 5,970 articles. There was marked diversity across all six studies meeting our search criteria in terms of research questions, health sector area, patient outcomes and network analysis methods. The paucity of articles, the complete lack of studies in low and middle-income contexts, the limited number in non-tertiary settings and few longitudinal, experimental designs or network interventions present clear research gaps. Paper 2: A cross-sectional, mixed-methods observational network study captured professional advice networks of 160 healthcare workers in eight primary health care units across four regions of Ethiopia. Data included health care worker advice seeking and giving for the provision of antenatal care, childbirth care, postnatal care and newborn care. Adjacency matrices were uploaded into UCINET 6.0 to calculate network metrics. Networks were visualised using NetDraw. Qualitative interviews of 20 purposively selected subjects followed the collection of quantitative network data to interpret and explain network roles and patterns observed. Expanded field notes were analysed using MaxQDA10. Results: Informal, inter-and intra-cadre advice networks existed. Fellow staff were preferred, but not limited to the primary health care unit. Average network-level metrics: density .26 (SD.11), degree centrality .45 (SD.08), distance 1.94 (SD.26), ties 95.63 (SD 35.46), network size 20.25 (SD 3.65). Conclusion: The systematic review found that network methods are underutilised in this area. The subsequent network study in Ethiopia serves to provide foundational information on healthcare worker professional advice networks.
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SENGUPTA, SHAMIK. "AN ECONOMIC FRAMEWORK FOR RESOURCE MANAGEMENT AND PRICING IN WIRELESS NETWORKS WITH COMPETITIVE SERVICE PROVIDERS." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2498.
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A paradigm shift from static spectrum allocation to dynamic spectrum access (DSA) is becoming a reality due to the recent advances in cognitive radio, wide band spectrum sensing, and network aware real--time spectrum access. It is believed that DSA will allow wireless service providers (WSPs) the opportunity to dynamically access spectrum bands as and when they need it. Moreover, due to the presence of multiple WSPs in a region, it is anticipated that dynamic service pricing would be offered that will allow the end-users to move from long-term service contracts to more flexible short-term service models. In this research, we develop a unified economic framework to analyze the trading system comprising two components: i) spectrum owner--WSPs interactions with regard to dynamic spectrum allocation, and ii) WSP--end-users interactions with regard to dynamic service pricing. For spectrum owner--WSPs interaction, we investigate various auction mechanisms for finding bidding strategies of WSPs and revenue generated by the spectrum owner. We show that sequential bidding provides better result than the concurrent bidding when WSPs are constrained to at most single unit allocation. On the other hand, when the bidders request for multiple units, (i.e., they are not restricted by allocation constraints) synchronous auction mechanism proves to be beneficial than asynchronous auctions. In this regard, we propose a winner determination sealed-bid knapsack auction mechanism that dynamically allocates spectrum to the WSPs based on their bids. As far as dynamic service pricing is concerned, we use game theory to capture the conflict of interest between WSPs and end--users, both of whom try to maximize their respective net utilities. We deviate from the traditional per--service static pricing towards a more dynamic model where the WSPs might change the price of a service almost on a session by session basis. Users, on the other hand, have the freedom to choose their WSP based on the price offered. It is found that in such a greedy and non-cooperative behavioral game model, it is in the best interest of the WSPs to adhere to a price threshold which is a consequence of a price (Nash) equilibrium. We conducted extensive simulation experiments, the results of which show that the proposed auction model entices WSPs to participate in the auction, makes optimal use of the common spectrum pool, and avoids collusion among WSPs. We also demonstrate how pricing can be used as an effective tool for providing incentives to the WSPs to upgrade their network resources and offer better services.Ph.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Computer Engineering PhD
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Huang, Shao-Chuan, and 黃紹銓. "Network Security Planning for New Generation Network Service Providers." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/48r6um.
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碩士國立中山大學
資訊管理學系研究所
97
The internet network and e- commerce become more and more popular currently. Various applications of the network and services already become the indispensable important tools to most enterprises, such as the application of e mail , to establish the entry website of company, installing server to provide employees with information sharing, etc.. As the internet network providing the convenience and business opportunity , as well as e commerce be further developed, all of such IT applications created unbelievable values to enterprises. However, the security of the internet network becomes an endless issues. The external attacks , such as the electronic virus , the worm, special Lip river depends on the hobbyhorse ( Trojan Horse), procedure of back door, spy''s software, the network hacker''s depend event and activities have never been stopped. From which, the enterprises suffered with great losses. Therefore, the IT people of company are requested to develop and installed a suitable protection system to guarantee the security of company information assets. The case company specified in my paper is the biggest ISP in Taiwan. It owns more than three millions of customers. The company also provides its over 20,000 staffs with internal network and management network equipment for conducting routine jobs. The network and information security concerns are more complicated than that of regular commercial companies. This research will discuss the management & Network Security planning of this company from the structure and system views. Not only to create potential benefit of rigid information Security for existing network, but also to offer IT planning people with valuable reference as they are performing the related works.
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"Public transport network design for competitive service providers." 2009. http://library.cuhk.edu.hk/record=b5893904.
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Chan, Yon Sim Eddie.Thesis submitted in: November 2008.
Thesis (M.Phil.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references (leaves 89-92).
Abstracts in English and Chinese.
Abstract --- p.i
Acknowledgement --- p.iii
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Motivation --- p.1
Chapter 1.2 --- Background --- p.2
Chapter 1.3 --- Literature Review --- p.5
Chapter 2 --- Game Theoretic Models For Competing Operators --- p.10
Chapter 2.1 --- Competitive Equilibrium Model --- p.12
Chapter 2.1.1 --- Base Model Formulation --- p.12
Chapter 2.1.2 --- Capacitated Model Formulation --- p.16
Chapter 2.1.3 --- Solution Methods --- p.19
Chapter 2.2 --- Net Profit Maximizing --- p.26
Chapter 2.2.1 --- Equitable Route Assignment --- p.27
Chapter 2.3 --- Congestion Game Model with Player- and Route-dependent Operating Cost --- p.31
Chapter 2.3.1 --- Best-Response Algorithm --- p.34
Chapter 2.3.2 --- Integer Programming Formulation --- p.41
Chapter 2.3.3 --- Net Profit Maximizing --- p.43
Chapter 3 --- Network Design --- p.45
Chapter 3.1 --- Network Structure --- p.47
Chapter 3.2 --- Comparison Between Two Network Structures --- p.49
Chapter 3.2.1 --- Routes with Same Ridership --- p.49
Chapter 3.2.2 --- Routes with Different Ridership --- p.65
Chapter 3.2.3 --- Network with Player- and Route-specific Profit Function --- p.69
Chapter 4 --- Elastic Demand --- p.71
Chapter 4.1 --- Congestion Game Model with Service-Quality-Based Elastic Demand --- p.71
Chapter 4.1.1 --- Network with Service-Quality-Based Elastic Demand --- p.82
Chapter 5 --- Conclusion --- p.84
Chapter 5.1 --- Future Work --- p.84
Chapter 5.1.1 --- Impact of Network Design and structure --- p.84
Chapter 5.1.2 --- Non-cooperative and Cooperative Games --- p.86
Chapter 5.1.3 --- Joint game-theoretic model of both passenger and providers --- p.87
Bibliography --- p.89
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"Bargaining and peering between network content/coverage providers." 2011. http://library.cuhk.edu.hk/record=b5894779.
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Feng, Guosen.Thesis (M.Phil.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references (p. 56-60).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Background for Network Content Providers' Peering --- p.1
Chapter 1.2 --- Literature Review --- p.5
Chapter 2 --- A Static Baseline Model --- p.12
Chapter 2.1 --- Content Qualities and Subscribing Fees --- p.12
Chapter 2.2 --- Users' Utilities --- p.13
Chapter 2.3 --- Providers' Coverages and Revenues --- p.14
Chapter 2.4 --- Content Procurement Strategies --- p.16
Chapter 2.5 --- The Peering and Bargaining of Providers --- p.16
Chapter 2.5.1 --- Peering Agreement --- p.16
Chapter 2.5.2 --- Change of Coverage --- p.17
Chapter 2.5.3 --- Providers' Revenues --- p.18
Chapter 2.5.4 --- Nash Bargaining Problem --- p.18
Chapter 3 --- Impact of Dynamic Content --- p.23
Chapter 3.1 --- Additional Investment for Dynamic Content --- p.24
Chapter 3.1.1 --- Content Change --- p.24
Chapter 3.1.2 --- Change of Coverage --- p.24
Chapter 3.1.3 --- Providers' Revenue --- p.30
Chapter 3.2 --- Finite Budget for Dynamic Content --- p.30
Chapter 3.2.1 --- Content Change --- p.30
Chapter 3.2.2 --- Change of Coverage --- p.30
Chapter 3.2.3 --- Providers' Revenue --- p.35
Chapter 4 --- Peeing in Dynamic Model --- p.36
Chapter 4.1 --- Peering over T Time Slots --- p.37
Chapter 4.1.1 --- "Content Change, Advertisement Sharing, and Payment ." --- p.37
Chapter 4.1.2 --- Change of Coverage --- p.37
Chapter 4.1.3 --- Providers' Revenue --- p.38
Chapter 4.1.4 --- Nash Bargaining Problem --- p.38
Chapter 4.2 --- Peering over One Time Slot --- p.45
Chapter 4.2.1 --- "Content Change, Advertisement Sharing, and Payment ." --- p.45
Chapter 4.2.2 --- Change of Coverage --- p.46
Chapter 4.2.3 --- Providers' Revenue --- p.48
Chapter 4.2.4 --- Nash Bargaining Problem --- p.49
Chapter 5 --- Summary and Future Work --- p.53
Bibliography --- p.56
Chapter A --- Proof of Optimal Peering Strategy --- p.61
Chapter A.1 --- Proof of Static Optimal Peering Strategy --- p.61
Chapter A.2 --- Proof of Strategy for Peering over T Time Slot --- p.65
Chapter A.3 --- Proof of Strategy for Peering over One Time Slot --- p.66
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Sookavatana, Pipat. "Service trading marketplace network (STAMP-Net) : a service discovery and composition architecture for customizable adaptive network /." 2003. http://www.library.unsw.edu.au/~thesis/adt-NUN/public/adt-NUN20041014.142233/index.html.
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McDaniel, James Grennell. "Health link: a wide area telecommunication network for health care providers." Thesis, 1994. https://dspace.library.uvic.ca//handle/1828/9670.
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Early computerized health information systems supported applications in hospital records and laboratory data collection. Since that time, software has been developed for a number of health care providers such as doctors and pharmacists. Although local area networks are installed at larger institutions, only a few small-scale, special-purpose, wide-area networks are installed for external providers. To be adopted, wide-area networks should provide greater functionality than, and be cost-competitive with, conventional communication methods. Several projects are underway in Health Information Science to develop and evaluate generic, wide-area networks.
This dissertation describes the design, analysis, development, implementation and evaluation of a prototype health care network which would be accessible to providers using existing computer equipment and the public switched telephone system. The network software, Health Link, supports reliable, automatic, store-and-forward messaging of medically-sensitive information. Encrypted messages can be authenticated and the software features registered delivery. An application programming interface formats messages in accordance with the HL7 data interchange standard.
Simulation studies have been conducted which demonstrate the steady state characteristic behaviour of a node in a uniform cluster. Further studies have investigated a realistic, dynamic, large scale network. A peer-to-peer model and client-server model were analyzed and both were found to be feasible with respect to certain performance and cost criteria. The client-server model was found to be less costly to operate than the peer-to-peer model. The peer-to-peer model can transfer messages in a shorter time than the client-server model.
The network software was verified in a field test involving four clinics, one medical laboratory, and one hospital. Data collected in the test provide performance benchmarks, an estimate of message sizes and frequencies, network reliability statistics, and a wealth of observations. Performance benchmarks and message traffic measurements were used to calibrate the simulation models.
Results from this and other research indicate that, although most of the technical networking problems can be readily overcome, consensus on standards, health care applications, and initiatives should be promoted before a wide-spread, production network is implemented.Graduate