Dissertations / Theses on the topic 'Telecommunication network management'
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Kiss, Zoltan. "Predictive Mobility Management for future mobile telecommunication networks." Thesis, De Montfort University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391858.
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Anjali, Tricha. "DiffServ/MPLS Network Design and Management." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5191.
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The MultiProtocol Label Switching (MPLS) framework is used in many networks to provide efficient load balancing which distributes the traffic for efficient Quality of Service (QoS) provisioning in the network. If the MPLS framework is combined with Differentiated Services (DiffServ) architecture, together they can provide aggregate-based service differentiation and QoS. The combined use of DiffServ and MPLS in a network is called DiffServ-aware Traffic Engineering (DS-TE). Such DiffServ-based MPLS networks demand development of efficient methods for QoS provisioning. In this thesis, an automated manager for management of these DiffServ-based MPLS networks is proposed. This manager, called Traffic Engineering Automated Manager (TEAM), is a centralized authority for adaptively managing a DiffServ/MPLS domain and it is responsible for dynamic bandwidth and route management. TEAM is designed to provide a novel and unique architecture capable of managing large scale MPLS/DiffServ domains without any human interference. TEAM constantly monitors the network state and reconfigures the network for efficient handling of network events. Under the umbrella of TEAM, new schemes for Label Switched Path (LSP) setup/teardown, traffic routing, and network measurement are proposed and evaluated through simulations. Also, extensions to include Generalized MPLS (GMPLS) networks and inter-domain management are proposed.
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Zhao, Qi. "Towards Ideal Network Traffic Measurement: A Statistical Algorithmic Approach." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19821.
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Thesis (Ph.D)--Computing, Georgia Institute of Technology, 2008.Committee Chair: Xu, Jun; Committee Member: Ammar, Mostafa; Committee Member: Feamster, Nick; Committee Member: Ma, Xiaoli; Committee Member: Zegura, Ellen.
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Yang, Yang. "Network congestion control." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037028.
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Saple, Avdhoot Kishore Yilmaz Levent. "Agent-based simulation of behavioral anticipation in computer networks a comparative study of anticipatory fault management /." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/SAPLE_AVDHOOTKISHORE_37.pdf.
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Che, Hao. "Measurement-based traffic modeling and network resource management /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
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Poon, Yuen-fong. "An evaluation of the role of the building management office in facilitating building access of network operators in Hong Kong." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31969185.
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Draai, Kevin. "A model for assessing and reporting network performance measurement in SANReN." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/16131.
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The performance measurement of a service provider network is an important activity. It is required for the smooth operation of the network as well as for reporting and planning. SANReN is a service provider tasked with serving the research and education network of South Africa. It currently has no structure or process for determining network performance metrics to measure the performance of its network. The objective of this study is to determine, through a process or structure, which metrics are best suited to the SANReN environment. This study is conducted in 3 phases in order to discover and verify the solution to this problem. The phases are "Contextualisation", "Design",and "Verification". The "Contextualisation" phase includes the literature review. This provides the context for the problem area but also serves as a search function for the solution. This study adopts the design science research paradigm which requires the creation of an artefact. The "Design" phase involves the creation of the conceptual network performance measurement model. This is the artefact and a generalised model for determining the network performance metrics for an NREN. To prove the utility of the model it is implemented in the SANReN environment. This is done in the "Verification" phase. The network performance measurement model proposes a process to determine network performance metrics. This process includes getting NREN requirements and goals, defining the NRENs network design goals through these requirements, define network performance metrics from these goals, evaluating the NRENs monitoring capability, and measuring what is possible. This model provides a starting point for NRENs to determine network performance metrics tailored to its environment. This is done in the SANReN environment as a proof of concept. The utility of the model is shown through the implementation in the SANReN environment thus it can be said that it is generic.The tools that monitor the performance of the SANReN network are used to retrieve network performance data from. Through understanding the requirements, determining network design goals and performance metrics, and determining the gap the retrieving of results took place. These results are analysed and finally aggregated to provide information that feeds into SANReN reporting and planning processes. A template is provided to do the aggregation of metric results. This template provides the structure to enable metrics results aggregation but leaves the categories or labels for the reporting and planning sections blank. These categories are specific to each NREN. At this point SANReN has the aggregated information to use for planning and reporting. The model is verified and thus the study’s main research objective is satisfied.
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Ng, Hwee Ping. "Performance analysis of management techniques for SONET/SDH telecommunications networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FNg.pdf.
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Poellabauer, Christian. "Q-Fabric: System Support for Continuous Online Quality Management." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04082004-134256/unrestricted/poellabauer%5Fchristian%5F200405%5Fphd.pdf.
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Thesis (Ph. D.)--Computing, Georgia Institute of Technology, 2004.Pande, Santosh, Committee Member ; Pu, Calton, Committee Member ; Schwan, Karsten, Committee Chair ; Franke, Hubertus, Committee Member ; Eisenhauer, Greg, Committee Member. Vita. Includes bibliographical references (leaves 158-169).
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Yoon, Janghyun. "A network-aware semantics-sensitive image retrieval system." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180459/unrestricted/yoon%5fjanghyun%5f200312%5fphd.pdf.
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Elkotob, Muslim. "Efficient and systematic network resource management." Doctoral thesis, Luleå tekniska universitet, Datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17190.
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The demand for network resources (e.g. forwarding capacity, buffer space) by increasingly used real-time multimedia applications is growing. Moreover, their stringent performance requirements (e.g. delay and jitter bounds) pose challenges on network resource management (RM). RM determines how available resources are modeled and distributed to achieve a performance goal such as assuring forwarding quality to real-time multimedia applications. Improvements to existing RM mechanisms can avoid performance limitations of networks by facilitating more efficient use of scarce resources. For example, in a vehicular to infrastructure (V2I) communication scenario that uses IP Multimedia Subsystem (IMS) lacking RM support for multicast, the 3G downlink quickly becomes a bottleneck although some information is addressed to multiple receivers. The main goal of this thesis is to develop RM algorithms and protocols that improve forwarding capacity utilization and remove performance bottlenecks. An additional goal is to improve the scalability of existing RM mechanisms. Three architectural paradigms are covered to demonstrate the advantages of efficient and systematic network RM: open access networks (OAN), next generation networks (NGN), and heterogeneous access networks (HAN). For OAN, a cross-layer signaling technique called parameter injection was developed. It reduces the signaling overhead and update time for real-time multimedia sessions over Wi-Fi while autonomously selecting the format and CODEC that best match the current resource settings. Within NGN, a resource management protocol is proposed for extending unicast signaling in IMS with multicast capabilities. The contribution uses adaptive and dynamic group size selection to improve resource utilization on the 3G downlink for the signaling and data planes. For HAN, an algorithm is proposed that predicts the best access network for achieving the highest QoE of a real-time multimedia session with the available QoS resources based on regression and statistical learning. In all three paradigms, the provided core contributions serve the common goal of achieving a performance edge in terms of efficiency and systematic operation with a limited amount of network resources.Godkänd; 2011; 20110207 (ysko); DISPUTATION Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Muslim Elkotob Ämnesområde: Mobila system/Mobile Systems Avhandling: Efficient and Systematic Network Resource Management Opponent: Professor Anna Brunström, Institutionen för datavetenskap, Karlstads universitet Ordförande: Docent Christer Åhlund, Institutionen för system- och rymdteknik, Luleå tekniska universitet Tid: Fredag den 18 mars 2011, kl 10.00 Plats: A1514, Luleå tekniska universitet
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Mirchandani, Prakash. "Polyhedral structure of a capacitated network design problem with an application to the telecommunication industry." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14224.
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Poon, Yuen-fong, and 潘源舫. "An evaluation of the role of the building management office in facilitating building access of network operators in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31969185.
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Lee, Tae-jin. "Traffic management and design of multiservice networks : the Internet and ATM networks /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
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NEVES, ANA PAULA KEIL. "STRATEGIC MANAGEMENT OF COMPANIES IN NETWORKS OF ALLIANCES IN A GLOBAL CONTEXT OF BIG CHANGES: FOCUS ON LEADING TELECOMMUNICATION NETWORK EQUIPMENT VENDORS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14157@1.
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A indústria de telecomunicações é caracterizada principalmente pela
inovação e pelo dinamismo. Nos últimos dez anos, as inovações tecnológicas que
surgiram mudaram a forma das pessoas e empresas se conectarem. Empresas de
telecomunicações cada vez mais estabelecem alianças e redes estratégicas para
competir no mundo globalizado. O presente trabalho tem como objetivo contribuir
para os estudos sobre gestão estratégica das empresas em alianças e redes de
relacionamento que atuam globalmente e em ambiente de mudanças, analisando
suas implicações na conduta e no desempenho das empresas. Tem como foco,
dentro da indústria de telecomunicações, o setor dos fornecedores de equipamento
de rede para telefonia móvel. Abrange três estudos de caso das empresas líderes
no mercado global de fornecimento de equipamentos de rede para telefonia
móvel: NokiaSiemens, Ericsson e Cisco, adotando a metodologia de estudo de
caso de Yin (2002). Baseia-se no pressuposto de que é importante considerar as
implicações das alianças e redes, dadas suas características, bem como as
implicações da sua atuação global na análise da conduta e do desempenho das
empresas. Para o levantamento de dados foram utilizadas as informações públicas
disponíveis nos sites especializados da indústria de telecomunicações e nos sites
das empresas, além de questionários e entrevistas complementares para capturar
as percepções dos executivos sobre as empresas e sua atuação global. Para a
análise estratégica sob a ótica relacional foi adotado o ferramental Strategic
Network Analysis - SNA de Macedo-Soares (2002) que inclui um modelo, uma
metodologia e listas de referência com construtos relacionais. O estudo
acrescentou a estas listas novos construtos pertinentes à gestão de mudanças e à
atuação no nível global. Com base nos resultados da análise relacional, a pesquisa
evidenciou que as empresas do setor de equipamentos de rede possuem estruturas
mais maduras para o gerenciamento de suas alianças e redes estratégicas. As três
empresas estudadas consideram que as alianças e redes globais são importantes
para suas estratégias globais e as utilizam principalmente para ampliar suas
competências. Trata-se de um setor que está em uma fase de transição entre uma
atuação dirigida pelo produto e uma atuação impulsionada pelo mercado, o que o
torna relevante para o estudo de gestão de mudanças estratégicas. A esse respeito,
cabe notar que o estudo evidenciou que as três empresas focadas utilizam redes e
alianças para conseguir gerenciar suas mudanças estratégicas, em alguns casos
através da aquisição de empresas que ampliem suas atuais competências e em
outros ao estabelecer alianças com os próprios concorrentes, principalmente
quando o objetivo é de criar, desenvolver ou ampliar o mercado - em especial por
meio de uma inovação tecnológica.The telecommunication industry´s main characteristics are innovation and dynamics. In the last ten years, technological innovation changed the way people and companies connect themselves. Telecommunication companies establish more and more alliances and strategic networks in order to compete in the globalized world. The objective of this study is to contribute to research on strategic management of firms in alliances and networks that act globally in a turbulent environment, analyzing their impacts on the company´s behavior and performance. Its focus is the telecommunication industry, precisely, the network equipment vendors for mobile telephones. It includes three case studies of global market leading companies: NokiaSiemens, Ericsson and Cisco, and makes use of the case study methodology (YIN, 2002). The study bases itself on the assumption that it is important to consider the strategic implications of alliances and social networks, given their characteristics, at both firm and industry levels, including their global impacts, when considering the firm´s conduct and overall results. For the data collection public information was used, available on specific telecom and company websites. Also a survey, that made use of a structured questionnaire, and interviews were carried out to capture the perceptions of the firms´ executives regarding the companies and their global performance. The strategic analysis was conducted with the help of Macedo-Soares´s (2002) SNA - Strategic Network Analysis - tools, which include a model, methodology and reference lists with pertinent constructs (2002). Drawing upon these reference lists, new constructs were added for analyzing global aspects as well as change management ones. The study made evident that the companies in the network equipment market have more mature organizations where alliance and strategic network management are concerned. The three companies focused in the study perceive alliances and global networks as very important for their global strategies especially in terms of acquiring and building new competencies. The telecommunication sector is going through a transition from being product focused to being market oriented, hence the relevance of investigating the strategic change management dimension. In this respect, it should be noted that the study strongly suggested that the three companies at issue use networks and alliances also to help manage their strategic changes, in some cases through acquisitions that enhance their competencies and in others through alliances with their competitors, especially when the main goal is to create, grow or develop the market, mainly by way of technological innovation.
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Jeon, Sung-eok. "Near-Optimality of Distributed Network Management with a Machine Learning Approach." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16136.
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An analytical framework is developed for distributed management of large networks where each node makes locally its decisions. Two issues remain open. One is whether a distributed algorithm would result in a near-optimal management. The other is the complexity, i.e., whether a distributed algorithm would scale gracefully with a network size. We study these issues through modeling, approximation, and randomized distributed algorithms. For near-optimality issue, we first derive a global probabilistic model of network management variables which characterizes the complex spatial dependence of the variables. The
spatial dependence results from externally imposed management constraints and internal properties of communication environments. We then apply probabilistic graphical models in machine learning to show when and whether the global model can be approximated by a local model. This study results in a sufficient condition for distributed management to be nearly optimal. We then show how to obtain a near-optimal configuration through decentralized adaptation of local configurations.
We next derive a near-optimal distributed inference algorithm based on the derived local model. We characterize the trade-off between near-optimality and complexity of distributed and statistical management. We validate our formulation and theory through simulations.
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Kolar, Vinay. "Routing and traffic-engineering in multi-hop wireless networks an optimization based approach /." Diss., Online access via UMI:, 2007.
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Wittner, Otto. "Emergent behavior based implements for distributed network management." Doctoral thesis, Norwegian University of Science and Technology, Department of Telematics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1787.
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Network and system management has always been of concern for telecommunication and computer system operators. The need for standardization was recognised already 20 years ago, hence several standards for network management exist today. However, the ever-increasing number of units connected to networks and the ever-increasing number of services being provided results in significant increased complexity of average network environments. This challenges current management systems. In addition to the general increase in complexity the trend among network owners and operators of merging several single service networks into larger, heterogeneous and complex full service networks challenges current management systems even further. The full service networks will require management systems more powerful than what is possible to realize basing systems purely on todays management standards. This thesis presents a distributed stochastic optimization algorithm which enables implementations of highly robust and efficient management tools. These tools may be integrated into management systems and potentially make the systems more powerful and better prepared for management of full service networks.
Emergent behavior is common in nature and easily observable in colonies of social insects and animals. Even an old oak tree can be viewed as an emergent system with its collection of interacting cells. Characteristic for any emergent system is how the overall behavior of the system emerge from many relatively simple, restricted behaviors interacting, e.g. a thousand ants building a trail, a flock of birds flying south or millions of cells making a tree grow. No centralized control exist, i.e. no single unit is in charge making global decisions. Despite distributed control, high work redundancy and stochastic behavior components, emergent systems tend to be very efficient problem solvers. In fact emergent systems tend to be both efficient, adaptive and robust which are three properties indeed desirable for a network management system. The algorithm presented in this thesis relates to a class of emergent behavior based systems known as swarm intelligence systems, i.e. the algorithm is potentially efficient, adaptive and robust.
On the contrary to other related swarm intelligence algorithms, the algorithm presented has a thorough formal foundation. This enables a better understanding of the algorithm’s potentials and limitations, and hence enables better adaptation of the algorithm to new problem areas without loss of efficiency, adaptability or robustness. The formal foundations are based on work by Reuven Rubinstein on cross entropy driven optimization. The transition from Ruinstein’s centralized and synchronous algorithm to a distributed and asynchronous algorithm is described, and the distributed algorithm’s ability to solve complex problems (NP-complete) efficiently is demonstrated.
Four examples of how the distributed algorithm may be applied in a network management context are presented. A system for finding near optimal patterns of primary/backup paths together with a system for finding cyclic protection paths in mesh networks demonstrate the algorithm’s ability to act as a tool helping management system to ensure quality of service. The algorithm’s potential as a management policy implementation mechanism is also demonstrated. The algorithm’s adaptability is shown to enable resolution of policy conflicts in a soft manner causing as little loss as possible. Finally, the algorithm’s ability to find near optimal paths (i.e. sequences) of resources in networks of large scale is demonstrated.
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Hawkins, William Cory. "Evaluation of the data vortex photonic all-optical path interconnection network for next-generation supercomputers." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-12182006-155304/.
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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2007.Dr. Henry L. Owen III, Committee Member ; Dr. David Keezer, Committee Member ; Dr. D. Scott Wills, Committee Chair.
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Lusilao-Zodi, Guy-Alain. "A Bandwidth Market in an IP Network." Thesis, Stellenbosch : University of Stellenbosch, 2008. http://hdl.handle.net/10019.1/1933.
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Thesis (MSc (Mathematical Sciences. Computer Science))--University of Stellenbosch, 2008.Consider a path-oriented telecommunications network where calls arrive to each route in a Poisson process. Each call brings on average a fixed number of packets that are offered to route. The packet inter-arrival times and the packet lengths are exponentially distributed. Each route can queue a finite number of packets while one packet is being transmitted. Each accepted packet/call generates an amount of revenue for the route manager. At specified time instants a route manager can acquire additional capacity (“interface capacity”) in order to carry more calls and/or the manager can acquire additional buffer space in order to carry more packets, in which cases the manager earns more revenue; alternatively a route manager can earn additional revenue by selling surplus interface capacity and/or by selling surplus buffer space to other route managers that (possibly temporarily) value it more highly. We present a method for efficiently computing the buying and the selling prices of buffer space. Moreover, we propose a bandwidth reallocation scheme capable of improving the network overall rate of earning revenue at both the call level and the packet level. Our reallocation scheme combines the Erlang price [4] and our proposed buffer space price (M/M/1/K prices) to reallocate interface capacity and buffer space among routes. The proposed scheme uses local rules and decides whether or not to adjust the interface capacity and/or the buffer space. Simulation results show that the reallocation scheme achieves good performance when applied to a fictitious network of 30-nodes and 46-links based on the geography of Europe.
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Rakotoarivelo, Thierry Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Distributed discovery and management of alternate internet paths with enhanced quality of service." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/27316.
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The convergence of recent technology advances opens the way to new ubiquitous environments, where network-enabled devices collectively form invisible pervasive computing and networking environments around the users. These users increasingly require extensive applications and capabilities from these devices. Recent approaches propose that cooperating service providers, at the edge of the network, offer these required capabilities (i.e services), instead of having them directly provided by the devices. Thus, the network evolves from a plain communication medium into an endless source of services. Such a service, namely an overlay application, is composed of multiple distributed application elements, which cooperate via a dynamic communication mesh, namely an overlay association. The Quality of Service (QoS) perceived by the users of an overlay application greatly depends on the QoS on the communication paths of the corresponding overlay association. This thesis asserts and shows that it is possible to provide QoS to an overlay application by using alternate Internet paths resulting from the compositions of independent consecutive paths. Moreover, this thesis also demonstrates that it is possible to discover, select and compose these independent paths in a distributed manner within an community comprising a limited large number of autonomous cooperating peers, such as the fore-mentioned service providers. Thus, the main contributions of this thesis are i) a comprehensive description and QoS characteristic analysis of these composite alternate paths, and ii) an original architecture, termed SPAD (Super-Peer based Alternate path Discovery), which allows the discovery and selection of these alternate paths in a distributed manner. SPAD is a fully distributed system with no single point of failure, which can be easily and incrementally deployed on the current Internet. It empowers the end-users at the edge of the network, allowing them to directly discover and utilize alternate paths.
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Zhang, Xin. "Network Formation and Routing for Multi-hop Wireless Ad-Hoc Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11470.
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An energy-aware on-demand Bluetooth scatternet formation and routing protocol taking into
account network architecture and traffic pattern is proposed. The scatternet formation protocol is able to cope with multiple sources initiating
traffic simultaneously as well as prolong network lifetime. A modified Inquiry scheme using extended ID packet is introduced for fast device discovery and power efficient propagation of route request messages with low delay. A mechanism employing POLL packets in Page processes is proposed to transfer scatternet formation and route reply information without extra overhead. In addition, the energy aware forwarding nodes selection scheme is based on local information and results in more uniform network resource utilization and improved network lifetime. Simulation results show that this protocol can provide scatternet formation
with reasonable delay and with good load balance which results in prolonged network lifetime for Bluetooth-based wireless sensor networks.
In this research, a metric-based scatternet formation algorithm for the Bluetooth-based sensor motes is presented. It optimizes the Bluetooth network formation from the hop distance
and link quality perspectives. In addition, a smart repair mechanism is proposed to deal with link/node failure and recover the network connectivity promptly with low overhead. The experiments with the Intel Mote platform demonstrate the effectiveness of the optimizations.
This research also investigates the scalability of ad hoc routing protocols in very large-scale wireless ad hoc networks. A comprehensive
simulation study is conducted of the performance of an on-demand routing protocol on a very large-scale, with as many as 50,000 nodes in the network. The scalability analysis is addressed based on various network sizes, node density, traffic load, and mobility. The reasons for packet loss are analyzed and categorized at each network layer. Based on the observations, we observe the effect of the parameter selection and try to exhaust the scalability boundary
of the on-demand routing protocol for wireless ad hoc networks.
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DEBELE, FIKRU GETACHEW. "Distributed Software Router Management." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2506278.
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With the stunning success of the Internet, information and communication technologies diffused increasingly attracting more uses to join the the Internet arsenal which in turn accelerates the traffic growth. This growth rate does not seem to slow down in near future. Networking devices support these traffic growth by offering an ever increasing transmission and switching speed, mostly due to the technological advancement of microelectronics granted by Moore’s Law. However, the comparable
growth rate of the Internet and electronic devices suggest that capacity of systems will become a crucial factor in the years ahead.
Besides the growth rate challenge that electronic devices face with respect to traffic growth, networking devices have always been characterized by the development of proprietary architectures. This means that incompatible equipment and architectures, especially in terms of configuration and management procedures. The major drawback of such industrial practice, however, is that the devices lack flexibility and
programmability which is one of the source of ossification for today’s Internet.
Thus scaling or modifying networking devices, particularly routers, for a desired function requires a flexible and programmable devices. Software routers (SRs) based on personal computers (PCs) are among these devices that satisfy the flexibility and programmability criteria. Furthermore, the availability of large number of open-source software for networking applications both for data as well as control plane and the low cost PCs driven by PC-market economy scale make software routers appealing alternative to expensive proprietary networking devices. That is, while software routers have the advantage of being flexible, programmable and low cost, proprietary networking equipments are usually expensive, difficult to extend, program, or otherwise experiment with because they rely on specialized and closed hardware and software.
Despite their advantages, however, software routers are not without limitation. The objections to software routers include limited performance, scalability problems and lack of advanced functionality. These limitations arose from the fact that a single server limited by PCI bus width and CPU is given a responsibility to process large amount of packets. Offloading some packet processing tasks performed by the CPU to other processors, such as GPUs of the same PC or external CPUs, is a viable approach to overcome some of these limitations.
In line with this, a distributed Multi-Stage Software Router (MSSR) architecture has been proposed in order to overcome both the performance and scalability issues of single PC based software routers. The architecture has three stages: i) a front-end layer-2 load balancers (LBs), open-software or open-hardware based, that act as interfaces to the external networks and distribute IP packets to ii) back-end personal computers (BEPCs), also named back-end routers in this thesis, that provide IP routing functionality, and iii) an interconnection network, based on Ethernet switches, that connects the two stages. Performance scaling of the architecture is achieved by increasing the redundancy of the routing functionality stage where multiple servers are given a coordinated task of routing packets. The scalability problem related to number of interfaces per PC is also tackled in MSSR by bundling two or more PCs’ interfaces through a switch at the front-end stage. The overall
architecture is controlled and managed by a control entity named Virtual Control Processor (virtualCP), which runs on a selected back-end router, through a DIST protocol. This entity is also responsible to hide the internal details of the multistage software router architecture such that the whole architecture appear to external network devices as a single device. However, building a flexible and scalable high-performance MSSR architecture requires large number of independently, but coordinately, running internal components. As the number of internal devices increase so does the architecture control and management complexity. In addition, redundant components to scale performance means power wastage at low loads. These challenges have to be addressed in making the multistage software router a functional and competent network device. Consequently, the contribution of this thesis is to develop an MSSR centralized
management system that deals with these challenges. The management system has two broadly classified sub-systems:
I) power management: a module responsible to address the energy inefficiency in multistage software router architecture
II) unified information management: a module responsible to create a unified management information base such that the distributed multistage router architecture appears as a single device to external network from management information perspective.
The distributed multistage router power management module tries to minimize the energy consumption of the architecture by resizing the architecture to the traffic demand. During low load periods only few components, especially that of routing functionality stage, are required to readily give a service. Thus it is wise to device a mechanism that puts idle components to low power mode to save energy during low load periods. In this thesis an optimal and two heuristic algorithms, namely
on-line and off-line, are proposed to adapt the architecture to an input load demand. We demonstrate that the optimal algorithm, besides having scalability issue, is an off-line approach that introduce service disruption and delay during the architecture reconfiguration period. In solving these issues, heuristic solutions are proposed and their performance is measured against the optimal solution. Results show that the algorithms fairly approximate the optimal solution and use of these algorithms save
up to 57.44% of the total architecture energy consumption during low load periods.
The on-line algorithms are superior among the heuristic solutions as it has the advantage of being less disruptive and has minimal service delay.
Furthermore, the thesis shows that the proposed algorithms will be more efficient if the architecture is designed keeping in mind energy as one of the design parameter.
In achieving this goal three different approaches to design an MSSR architecture are proposed and their energy saving efficient is evaluated both with respect to the optimal solution and other similar cluster design approaches. The multistage software router is unique from a single device as it is composed of independently running components. This means that the MSSR management information is distributed in the architecture since individual components register their own management information. It is said, however, that the MSSR internal devices work cooperatively to appear as a single network device to the external network.
The MSSR architecture, as a single device, therefore requires its own management information base which is built from the management information bases dispersed among internal components. This thesis proposes a mechanism to collect and organize this distributed management information and create a single management
information base representing the whole architecture. Accordingly existing SNMP management communication model has been modified to fit to distributed multi-stage router architecture and a possible management architecture is proposed. In compiling the management information, different schemes has been adopted to deal with different SNMP management information variables. Scalability analysis shows
that proposed management system scales well and does not pose a threat to the overall architecture scalability.
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Vicente, Sandro Antônio. "Análise da aplicação dos padrões TMN no gerenciamento de sistemas de CRM." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-13112003-234029/.
Full textAbstract:
Embora a tecnologia da informação (TI) venha sendo utilizada em aplicações de negócios desde a década de 60, foi só a partir do final da década de 80 que essas tecnologias transformaram-se em elementos essenciais para corporações de qualquer porte. Dessa forma, o perfil dos usuários de TI deixou de ser o das grandes corporações e passou a compreender também empresas de médio e pequeno porte. Atualmente, as TI são fartamente empregadas na realização e gestão de processos de negócios através de sistemas corporativos orientados para diversas finalidades como, por exemplo, ERP (Enterprise Resource Planning), SCM (Supply Chain Management) e CRM (Customer Relationship Management). Na medida que um sistema corporativo cresce e incorpora novas funcionalidades, cresce sua complexidade. Atualmente, tais sistemas compreendem diversos componentes heterogêneos, geograficamente distribuídos, administrados por diferentes organizações e seu gerenciamento apresenta-se como um novo desafio. Este trabalho analisa a aplicação de padrões abertos, definidos para a modelagem de sistemas distribuídos e para o gerenciamento de redes de telecomunicações, no gerenciamento de sistemas corporativos complexos. Especificamente, será analisada a aplicação do dos padrões TMN (Telecommunication Management Network), desenvolvido para o gerenciamento de redes de telecomunicações, no gerenciamento de sistemas de CRM, que apresentam extrema complexidade por envolverem diversas tecnologias, distribuição geográfica e diversas disciplinas (bancos de dados, ferramentas de análise de informações, redes de computadores, sistemas legados e diversas mídias de contato).Despite the fact that the information technology (IT) has been applied for business purposes since the sixties, they only became essential to business in the late eighties, when the technology started to play an essential role for corporations of any size. Therefore, the profile of the typical IT user in business has shifted from huge companies to mid-sized and even small companies. Nowadays, IT is widely applied for the management of business processes through the use of corporate systems oriented for different purposes like, for example, ERP (Enterprise Resource Planning), SCM (Supply Chain Management) and CRM (Customer Relationship Management). As far as a corporate system grows and works in new features, grows its complexity as well. Nowadays, such systems usually comprise lots of different heterogeneous components, geographically distributed, administered by different organizations and, as a result, the management of such systems became a new challenge. This dissertation analyses the application of open standards, designed to allow the modeling of distributed systems and the management of telecommunication networks, to the management of complex corporate systems. More specifically, it will analyze the application of the TMN standards, developed for the management of telecommunications networks, to the management of CRM systems, where the latter presents extreme complexity due to the fact that it usually involves different technologies, geographical distribution and many disciplines (such as databases, information analysis tools, computer networks, legacy systems and various communication medias).
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Mazandu, Gaston Kuzamunu. "Traffic Engineering using Multipath Routing Approaches." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/679.
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Verett, Marianna J. "Performance and usage of biometrics in a testbed environment for tactical purposes." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FVerett.pdf.
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Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, December 2006.Thesis Advisor(s): Alex Bordetsky. "December 2006." Includes bibliographical references (p. 71-74). Also available in print.
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Weil, Daniel. "Architectures de circuits pour la commutation et la gestion de ressources en ATM." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0066.
Full textAbstract:
Au fur et a mesure que s'affinent les services proposes sur les reseaux atm, des algorithmes de plus en plus complexes doivent etre mis en place autour des nuds de commutation et necessitent la conception de circuits integres. L'objectif de cette these est d'explorer de nouvelles architectures pour ces algorithmes en essayant de degager les methodes les plus efficaces et en s'appuyant sur des experiences concretes de conception materielle. Nous sommes tout d'abord places dans un contexte ou les specifications sont stables et l'architecture bien definie des le debut de la conception. Aussi nous pouvons utiliser efficacement le flot de conception classique fonde sur une modelisation au niveau rtl pour le developpement d'un commutateur atm, com16m, integrant sur une seule puce de 6 millions de transistors une capacite de commutation de 10 gbit/s. Cependant, la prochaine generation de commutateur atm devra integrer des algorithmes de controle de trafic, de lissage de trafic et de gestion de ressources dont la complexite et les contraintes temporelles necessitent toujours des realisations materielles. Or, les specifications de ces algorithmes sont en continuelle evolution et cette instabilite est incompatible avec les temps de developpement requis par les methodes classiques de conception materielle. Nous proposons alors d'utiliser une methode de conception de haut niveau fonde sur la synthese comportementale afin d'explorer de nouvelles architectures et d'en estimer rapidement et de maniere tres precise leurs performances. Nous synthetisons dans une technologie 0,25 m plusieurs series d'architectures ayant des performances variant entre 300 mbit/s et 4,5 gbit/s. Ces resultats nous permettent enfin d'ebaucher une architecture pour la prochaine generation de commutateurs atm.
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Júnior, Jamil Kalil Naufal. "Algoritmo e arquitetura para a localização de falhas em sistemas distribuídos." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-29082016-082504/.
Full textAbstract:
Devido à tendência mundial de crescimento sem precedentes na história das telecomunicações, verifica-se atualmente um aumento crescente no segmento das redes de comunicações com respeito ao seu tamanho e em seus correspondentes elementos, tornando o seu gerenciamento uma atividade árdua e complexa do ponto de vista de sua operação. Adicione-se a isto o fato de que o sucesso no empreendimento dos diferentes negócios atuais, no contexto da utilização das redes de comunicações, é dependente exclusivamente da qualidade do serviço e funcionamento dessas redes. A ocorrência de falhas em qualquer sistema de comunicação é de certa forma inevitável e, portanto, mais críticos em sistemas de grande porte, seja em termos de quantidade e variedade de falhas. Dessa forma, é desejável que sejam desenvolvidas novas técnicas que permitam à rede de comunicação uma maior rapidez e eficiência na detecção e correção de operações sistêmicas anormais e, consequentemente, sejam consideradas como atributos prioritários em seu projeto. Em outras palavras, a implementação destas novas técnicas permitirá ao sistema a capacidade de detecção, isolação e reconfiguração de um dado componente falho com referência aos requisitos de maior rapidez e eficiência, aumentando sobremaneira a disponibilidade da rede. Neste trabalho de dissertação é proposto um algoritmo e uma arquitetura para o gerenciamento de falhas, além de verificar a sua aderência quanto ao requisito disponibilidade de rede.Due to the unprecedented world growth trend in the telecommunications history, it is currently realized the enormous increase in the communication networks segment regarding in the size and in its correspondent elements as well, becoming its own management an arduous and complex activity in the operation point of view consideration. Also, it must be taken into account that the real success concerning the currently and different business enterprise in the communications networks usage context are exclusively dependant on the quality of the service and the correct working of these networks. The fault occurrence in any communication system is generally inevitable and therefore more critical when considering large systems configuration, in terms of number and variety of faults. In this way, it is desirable that new techniques be developed, allowing the communication networks the ability to handle faster and more efficiency the detection and correction in case of anormal systemic operations. Therefore, it must be considered as a priority attribute in the new networks design. In other words, the implementation of these new techniques will allow the systems to have the capacity to detect, isolate and reconfigure a given fault component, regarding the quickness and efficiency attribute, increasing the network availability. It is proposed in this dissertation, an algorithm and an architecture for fault management and how they are adhered to the network availability.
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Leung, Matthew Chung-Hin. "CMOS RF SOC Transmitter Front-End, Power Management and Digital Analog Interface." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24664.
Full textAbstract:
With the growing trend of wireless electronics, frequency spectrum is crowded with different applications. High data transfer rate solutions that operate in license-exempt frequency spectrum range are sought. The most promising candidate is the 60 GHz multi-giga bit transfer rate millimeter wave circuit. In order to provide a cost-effective solution, circuits designed in CMOS are implemented in a single SOC.
In this work, a modeling technique created in Cadence shows an error of less than 3dB in magnitude and 5 degree in phase for a single transistor. Additionally, less than 3dB error of power performance for the PA is also verified. At the same time, layout strategies required for millimeter wave front-end circuits are investigated. All of these combined techniques help the design converge to one simulation platform for system level simulation.
Another aspect enabling the design as a single SOC lies in integration. In order to integrate digital and analog circuits together, necessary peripheral circuits must be designed. An on-chip voltage regulator, which steps down the analog power supply voltage and is compatible with digital circuits, has been designed and has demonstrated an efficiency of 65 percent with the specific area constraint. The overall output voltage ripple generated is about 2 percent.
With the necessary power supply voltage, gate voltage bias circuit designs have been illustrated. They provide feasible solutions in terms of area and power consumption. Temperature and power supply sensitivities are minimized in first two designs. Process variation is further compensated in the third design. The third design demonstrates a powerful solution that each aspect of variations is well within 10%.
As the DC conditions are achieved on-chip for both the digital and analog circuits, digital and analog circuits must be connected together with a DAC. A high speed DAC is designed with special layout techniques. It is verified that the DAC can operate at a speed higher than 3 Gbps from the pulse-shaping FIR filter measurement result.
With all of these integrated elements and modeling techniques, a high data transfer rate CMOS RF SOC operating at 60 GHz is possible.
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Fares, Rasha H. A. "Performance modelling and analysis of congestion control mechanisms for communication networks with quality of service constraints. An investigation into new methods of controlling congestion and mean delay in communication networks with both short range dependent and long range dependent traffic." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5435.
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Active Queue Management (AQM) schemes are used for ensuring the Quality of Service (QoS) in telecommunication networks. However, they are sensitive to parameter settings and have weaknesses in detecting and controlling congestion under dynamically changing network situations. Another drawback for the AQM algorithms is that they have been applied only on the Markovian models which are considered as Short Range Dependent (SRD) traffic models. However, traffic measurements from communication networks have shown that network traffic can exhibit self-similar as well as Long Range Dependent (LRD) properties. Therefore, it is important to design new algorithms not only to control congestion but also to have the ability to predict the onset of congestion within a network.
An aim of this research is to devise some new congestion control methods for communication networks that make use of various traffic characteristics, such as LRD, which has not previously been employed in congestion control methods currently used in the Internet. A queueing model with a number of ON/OFF sources has been used and this incorporates a novel congestion prediction algorithm for AQM. The simulation results have shown that applying the algorithm can provide better performance than an equivalent system without the prediction. Modifying the algorithm by the inclusion of a sliding window mechanism has been shown to further improve the performance in terms of controlling the total number of packets within the system and improving the throughput.
Also considered is the important problem of maintaining QoS constraints, such as mean delay, which is crucially important in providing satisfactory transmission of real-time services over multi-service networks like the Internet and which were not originally designed for this purpose. An algorithm has been developed to provide a control strategy that operates on a buffer which incorporates a moveable threshold. The algorithm has been developed to control the mean delay by dynamically adjusting the threshold, which, in turn, controls the effective arrival rate by randomly dropping packets. This work has been carried out using a mixture of computer simulation and analytical modelling. The performance of the new methods that haveMinistry of Higher Education in Egypt and the Egyptian Cultural Centre and Educational Bureau in London
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Fares, Rasha Hamed Abdel Moaty. "Performance modelling and analysis of congestion control mechanisms for communication networks with quality of service constraints : an investigation into new methods of controlling congestion and mean delay in communication networks with both short range dependent and long range dependent traffic." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5435.
Full textAbstract:
Active Queue Management (AQM) schemes are used for ensuring the Quality of Service (QoS) in telecommunication networks. However, they are sensitive to parameter settings and have weaknesses in detecting and controlling congestion under dynamically changing network situations. Another drawback for the AQM algorithms is that they have been applied only on the Markovian models which are considered as Short Range Dependent (SRD) traffic models. However, traffic measurements from communication networks have shown that network traffic can exhibit self-similar as well as Long Range Dependent (LRD) properties. Therefore, it is important to design new algorithms not only to control congestion but also to have the ability to predict the onset of congestion within a network. An aim of this research is to devise some new congestion control methods for communication networks that make use of various traffic characteristics, such as LRD, which has not previously been employed in congestion control methods currently used in the Internet. A queueing model with a number of ON/OFF sources has been used and this incorporates a novel congestion prediction algorithm for AQM. The simulation results have shown that applying the algorithm can provide better performance than an equivalent system without the prediction. Modifying the algorithm by the inclusion of a sliding window mechanism has been shown to further improve the performance in terms of controlling the total number of packets within the system and improving the throughput. Also considered is the important problem of maintaining QoS constraints, such as mean delay, which is crucially important in providing satisfactory transmission of real-time services over multi-service networks like the Internet and which were not originally designed for this purpose. An algorithm has been developed to provide a control strategy that operates on a buffer which incorporates a moveable threshold. The algorithm has been developed to control the mean delay by dynamically adjusting the threshold, which, in turn, controls the effective arrival rate by randomly dropping packets. This work has been carried out using a mixture of computer simulation and analytical modelling. The performance of the new methods that have.
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Agarwala, Sandip. "System Support for End-to-End Performance Management." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16171.
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This dissertation introduces, implements, and evaluates the novel concept of
"Service Paths", which are system-level abstractions that capture and describe
the dynamic dependencies between the different components of a distributed
enterprise application. Service paths are dynamic because they capture the
natural interactions between application services dynamically composed to offer
some desired end user functionality. Service paths are distributed because such
sets of services run on networked machines in distributed enterprise data
centers. Service paths cross multiple levels of abstraction because they link
end user application components like web browsers with system services like
http providing communications with embedded services like hardware-supported
data encryption. Service paths are system-level abstractions that are created
without end user, application, or middleware input, but despite these facts,
they are able to capture application-relevant performance metrics, including
end-to-end latencies for client requests and the contributions to these
latencies from application-level processes and from software/hardware resources
like protocol stacks or network devices.
Beyond conceiving of service paths and demonstrating their utility, this thesis
makes three concrete technical contributions. First, we propose a set of signal
analysis techniques called ``E2Eprof' that identify the service paths taken
by different request classes across a distributed IT infrastructure and
the time spent in each such path. It uses a novel algorithm called ``pathmap'
that computes the correlation between the message arrival and departure
timestamps at each participating node and detect dependencies among them. A
second contribution is a system-level monitoring toolkit called ``SysProf',
which captures monitoring information at different levels of granularity,
ranging from tracking the system-level activities triggered by a single system
call, to capturing the client-server interactions associated with a service
paths, to characterizing the server resources consumed by sets of clients or
client behaviors.
The third contribution of the thesis is a publish-subscribe based monitoring
data delivery framework called ``QMON'. QMON offers high levels of
predictability for service delivery and supports utility-aware monitoring
while also able to differentiate between different levels of service
for monitoring, corresponding to the different classes of SLAs maintained for
applications.
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Ben, Yahia Saloua. "Stratégies et techniques de survie pour les réseaux ATM maillés." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0085.
Full textAbstract:
Cette thèse a comme objectif de donner une vision unifiée de l'intégration de stratégies de survie distribuées dans un réseau haut débit type ATM. Elle présente d'abord les principes de base du protocole ATM, l'architecture des réseaux ATM ainsi que les fonctions de contrôle et de gestion de ces réseaux. Une synthèse bibliographique introduit ensuite les principales techniques de restauration et de survie distribuées développées dans le cadre des réseaux synchrones (STM) et des réseaux asynchrones (ATM). Les concepts nouveaux sont ensuite introduits en particulier la notion de sous-réseaux à capacité de survie et la restauration multi-niveaux. Avec la restauration multi-niveaux, les différentes techniques de survie adaptées à chaque sous-réseau sont intégrées dans une seule et même stratégie qui gère la coopération entre les différents mécanismes pouvant être déclenchés au niveau de chaque sous-réseau et devrait permettre d'utiliser au mieux les ressources disponibles et d'éviter les conflits qui peuvent survenir. Une extension de la norme I. 610 est ensuite proposée, elle définit un nouvel objectif pour les flux de maintenance à savoir le contrôle du processus de restauration simple ou multi-niveaux. L'outil ANSAT (Analysis Survivability Tool for ATM Networks) est enfin présenté. L'outil ANSAT présenté se structure autour de trois modules. Le premier module appelé Planificateur permet de réserver des capacités de secours sur les liens. Le Planificateur permet aussi d'introduire des niveaux de survie et de hiérarchiser les connexions. Le module Restaurateur, se charge d'opérer la reconfiguration du réseau après l'occurrence d'une panne. Enfin, le module Analyseur, permet d'analyser la «survivabilité» et de s'assurer que sous les scénarios de défaillances les plus courants, les performances du réseau ne vont pas se dégrader en dessous de niveaux prédéterminés.
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Marcusso, Diego Berlim. "Sistem?tica para implementa??o de Redes Definidas por Software em Data Center." Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/997.
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Pontif?cia Universidade Cat?lica de Campinas ? PUC Campinas
The present dissertation work has as main objective analyses the Data communication networks for Data Centers, that have undergone a major technical evolution in recent years due to problems and limitations of conventional networks, such as lack of network availability, poor performance, inefficient use of installed network components, complexity and agility in the provision of new applications. These and other problems motivated the development of new technologies more flexible and configurable according to the particular need of each client. Software Defined Networking (SDN) technology found in most network equipment and vendors addresses these issues and brings more efficiency and simplicity to the provisioning of new network resources. This work presents a method for implementing SDN in Data Center in Brazil and also a comparative that analyzes the conventional network model and the SDN based model. This comparison is made based on functional aspects such as provisioning, Quality of Service (QoS), security and others. In order to compare the two technologies, a scenario was created with several network nodes and simulated the provisioning of a new application with several network requirements. The result obtained shows that the systematics can be applied to clients that wish to implement new networks for Data Center or migrate their conventional networks to the SDN model in a structured way, mapping all technical and business needs for network implementation, creating a database testing, determining the most appropriate solution for the environment and testing it in a controlled environment.
O presente trabalho de disserta??o tem como principal objetivo analisar as redes de comunica??o de dados para Data Centers, que sofreram grande evolu??o t?cnica nos ?ltimos anos devido a problemas e limita??es das redes convencionais, como falta de disponibilidade na rede, baixo desempenho, utiliza??o ineficiente dos componentes de rede instalados, complexidade e atraso no provisionamento de novas aplica??es. Esses e outros problemas motivaram o desenvolvimento de novas tecnologias mais flex?veis e configur?veis de acordo com a necessidade particular de cada cliente. A tecnologia Software Defined Networking (SDN), presente na maioria dos fabricantes de equipamentos e solu??es de rede, endere?a esses problemas e traz mais efici?ncia e simplicidade no provisionamento de novos recursos de rede. Neste trabalho, ser? apresentada uma sistem?tica para implementa??o de SDN. O resultado obtido ilustra que tal sistem?tica pode ser aplicada em clientes que desejam implementar novas redes para Data Center ou migrar suas redes convencionais para o modelo SDN de forma estruturada, mapeando todas as necessidades t?cnicas e de neg?cio para implementa??o da rede, criando uma base de testes, determinando a solu??o mais adequada ao ambiente e testando-a em ambiente controlado.
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Wells, Nigel Thomas. "A framework for fault management in telecommunications networks." Thesis, University of Ulster, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365422.
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Humair, Salal. "Yield management for telecommunication networks : defining a new landscape." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8787.
Full textAbstract:
Thesis (Ph.D.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2001.Includes bibliographical references (leaves 141-146).
Can airline Yield Management strategies be used to generate additional revenue from spare capacity in telecom networks? Pundits believe "yes", based on several analogies between the industries such as, for instance, perishable inventory and negligible marginal cost of usage. However, no one has yet described how, one of the chief difficulties being the vastly different nature of airlines products and telecom services. Motivated to show how Operations Research can play a role in structuring this area, we: (i) argue that telecom Yield Management should be based on 'innovative' services explicitly designed to use only spare capacity, (ii) propose, borrowing from airlines, a framework to simplify related decision modeling, and (iii) demonstrate both our argument and the framework by articulating several 'innovative' telecom services and modeling them to varying degrees of depth. This thesis focuses only on the decision-making that will be required within a large infrastructure for operating new 'Yield Management' services. For each service, several decision variables can be considered to maximize revenue from available capacity, e.g. pricing, capacity limits and admission control, among others. Incorporating all such decisions in a single model usually leads to complicated formulations. A framework that decouples the decisions from each other to obtain simpler, more insightful models is therefore immensely helpful. We propose using the airlines modeling framework to separate the decisions involved in the operation of each new service. This framework classifies models into forecasting, over-booking, seat-inventory control, pricing and market segmentation to reduce the complexity of the system-wide problem. To make this framework useful for telecom, we provide a detailed interpretation of each category in the telecom context. . Finally, the majority of this thesis is the six service ideas that illustrate our argument and the models that demonstrate how the framework might be used. For each service we propose, we discuss possible markets and practical issues. We then formulate a model for one of the decisions resulting from the framework. These models are analyzed to varying depths to demonstrate the operating rules one can discover for revenue maximization. The contributions of this work are at multiple levels. In addition to our argument and examples of services proposed for telecom Yield Management, it structures the modeling questions in a coherent manner, exploiting more than only the high-level connections between airlines and telecom. Finally, the models themselves are useful and their contributions are at the analytical level. This thesis makes clear several connections between airline and telecom Yield Management that people have found difficult to establish in the past.
by Salal Humair.
Ph.D.
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Gonzalez, Prieto Alberto. "Adaptive management for networked systems." Licentiate thesis, Stockholm : School of electrical engineering, KTH, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4022.
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Lim, Wee Shoong. "An evaluation of management techniques for SONET/SDH Telecommunication networks." Thesis, Monterey California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1389.
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Approved for public release; distribution is unlimitedA study of SONET network management applications and the load they impart to the network is conducted to provide a better understanding of the capability of various management approaches. In this study, a SONET network is set up in the Advanced Networking Laboratory of the Naval Postgraduate School using four Cisco ONS 15454s. Next, two Element Management Systems, the Cisco Transport Controller and the Cisco Transport Manager, are deployed onto the SONET network. Subsequently, the network traffic of the Element Management Systems is captured and analyzed using a packet analyzer. Link utilization of the two tools is computed using the first-order statistics of the captured traffic distributions. In addition, the Hurst parameter is estimated using the variance-index plot technique (which uses higher-orders statistics of the modeled distributions) to determine the captured traffic's degree of self-similarity. Finally, the calculated utilization is extrapolated to obtain the link utilization for 2500 network elements (the maximum number supported by the Cisco Transport Manager). The result obtained is useful in determining the maximum number of network elements (Cisco ONS 15454s) that the Cisco Transport Manager can support from a network loading point of view.
Civilian, Ministry of Defense, Singapore
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Meempat, Gopalakrishnan. "Modeling and adaptive resource management in integrated communication networks." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184843.
Full textAbstract:
The focus of this dissertation is the development of resource management schemes for integrated networks, with the major contributions being: (i) the development of an optimal adaptive buffer management scheme for the packet-switched subsystem, (ii) the integration of a moveable-boundary hybrid switching scheme with the time assigned speech interpolation technique for implementing a congestion control mechanism for the packet-switched subsystem, and (iii) the development of an adaptive hierarchical scheme for implementing the access control and routing functions within the circuit-switched subsystem. The problem of buffer management at an integrated network node is formulated as a nonlinear programming problem with a convex objective function and an interative solution technique with fast convergence is proposed for a real-time implementation of the buffer management scheme in practical environments. In order to exercise an additional degree of control over the packet-blocking probability at each hybrid-switched link within the network, a new multiplexing scheme based on the integration of the moveable-boundary hybrid switching scheme and the time assigned speech interpolation technique is presented in this dissertation. The tradeoff between the corresponding decrease in the packet blocking probability and the increase in the circuit freezeout fraction is demonstrated by a detailed queueing analysis of the multiplexer. Specific algorithms are also presented in this dissertation for the solution of the access control and routing problems within the circuit-switched subsystem. In particular, an access control scheme is developed by solving an integer programming problem formulated using the policy of complete partitioning of the available bandwidth among the competing user classes. As an alternative to the completely partitioned approach, the problem of traffic routing is considered in a network that supports homogeneous traffic classes based on the policy of complete sharing. Finally, for the general case of networks with heterogeneous traffic classes, a hierarchical scheme is developed for the implementation of the access control and the routing functions at two functional levels, where the access control is implemented by the network supervisor who solves an appropriate linear integer programming problem periodically, and the routing function is handled by the individual nodes of the network on a distributed basis. (Abstract shortened with permission of author.)
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Zachariadis, Grigorios. "Pricing and resource allocation for telecommunications networks using revenue management." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484426.
Full textAbstract:
In this thesis we develop models for several types of telecommunications services, and obtain the optimal prices and resource allocation for the offered services. We develop our solutions within a revenue management framework, whose underlying aims is to match the offered services to the needs of the market in a way which maximises the provider's income. Firstly, a novel solution for the problem of calculating the optimal static prices and offered quality of service (QoS) is proposed for a link with flows belonging to multiple classes of service with the aim of maximising the provider's income. Two solutions are developed. The first is based on the limiting regime (LR) approximation, which reduces the complexity of the problem, and, depending on the scale of the problem, offers results within 2%-30% of the optimal ones. The second is a heuristic improvement of the LR solution, with results within 0.1-3% of the optimal ones. The obtained solutions are then extended to a network environment using a decomposition approach. We then develop a novel framework where offered prices and QoS are allowed to be actively modified by the provider, depending on the demand and the congestion of the system. Using dynamic programming we obtain a solution to the problem and we observe that using this approach, the provider's income increases between 2%-20% compared to the static approach. The problem of distributing load among different routes using pricing is addressed next. In this case, the demand for different routes partially depends on the prices and QoS for each route, and we propose methods to calculate the optimal prices for each route. Finally, we develop a framework for booking services in advance in a system with multiple classes of service. Then the optimal pricing and resource allocation are calculated with the aim of maximising the provider's income.
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Sang, Aimin. "Measurement-based traffic management for QoS guarantee in multi-service networks." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3033587.
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Su, Ching-fong. "Efficient traffic management based on deterministically constrained traffic flows /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
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Gürbüz, Özgür. "Power control based QoS provisioning for wireless multimedia networks." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14888.
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Bihina, Bella Madeleine Adrienne. "A fraud management system architecture for next-generation networks." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-07102008-145544/.
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Legge, David Nathanial. "Application of ant based routing and intelligent control to telecommunications network management." Thesis, Durham University, 2006. http://etheses.dur.ac.uk/2788/.
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This thesis investigates the use of novel Artificial Intelligence techniques to improve the control of telecommunications networks. The approaches include the use of Ant-Based Routing and software Agents to encapsulate learning mechanisms to improve the performance of the Ant-System and a highly modular approach to network-node configuration and management into which this routing system can be incorporated. The management system uses intelligent Agents distributed across the nodes of the network to automate the process of network configuration. This is important in the context of increasingly complex network management, which will be accentuated with the introduction of IPv6 and QoS-aware hardware. The proposed novel solution allows an Agent, with a Neural Network based Q-Learning capability, to adapt the response speed of the Ant-System - increasing it to counteract congestion, but reducing it to improve stability otherwise. It has the ability to adapt its strategy and learn new ones for different network topologies. The solution has been shown to improve the performance of the Ant-System, as well as outperform a simple non-learning strategy which was not able to adapt to different networks. This approach has a wide region of applicability to such areas as road-traffic management, and more generally, positioning of learning techniques into complex domains. Both Agent architectures are Subsumption style, blending short-term responses with longer term goal-driven behaviour. It is predicted that this will be an important approach for the application of AI, as it allows modular design of systems in a similar fashion to the frameworks developed for interoperability of telecommunications systems.
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Pavlou, Georgios. "Telecommunications management network : a novel approach for its architecture through software platforms." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300448.
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Gasimli, Elkhan. "Container Network Interface Management with Kubernetes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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The orchestration of containers and cloud-native computing has gained a lot of attention in recent years. The level of adoption has risen to such an extent that even businesses in finance, banking and the public sector are involved. Containers are deployed in both public and private cloud environments and are typically deployed in VM (Virtual Machines) environments for versatility. Microservices demand usage of large number of containers that require orchestration, and one of the most common solutions is Kubernetes. However, Kubernetes does not provide networking solution and CNI (Container Networking Interface) and its plugins provide it. Their capabilities must be measured in order to select the best plugin. In this thesis, the most used Kubernetes CNI plugins such as Flannel, Calico and Cilium are deployed and tested. At the end, main differences, advantages and disadvantages of the plugins are discussed in order to make a corresponding choice based on required project.
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Marques, Ricardo Jorge de Santiago. "Big data model with SQL support for performance management in telecommunication networks." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14558.
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Mestrado em Sistemas de InformaçãoCom o tempo, a informação mantida pelas aplicações tem vindo a crescer e espera-se um crescimento exponencialmente na área de banda larga móvel com o surgimento da LTE. Com este crescimento cada vez maior de dados gerados, surge a necessidade de os manter por um período maior de tempo e as RDBMS não respondem rápido o suficiente. Isto fez com que as empresas se se tenham afastado das RDBMS e em busca de outras alternativas. As novas abordagens para o aumento do processamento de dados baseiam-se no desempenho, escalabilidade e robustez. O foco é sempre o processamento de grandes conjuntos de dados, tendo em mente que este conjunto de dados vai crescer e vai ser sempre necess ario uma resposta r apida do sistema. Como a maioria das vezes as RDBMS já fazem parte de um sistema implementado antes desta tendência de crescimento de dados, é necessáio ter em mente que as novas abordagens têm que oferecer algumas soluções que facilitem a conversão do sistema. E uma das soluções que é necessário ter em mente é como um sistema pode entender a semântica SQL.
Over time, the information kept by the applications has been growing and it is expected to grow exponantially in the Mobile Broadband area with the emerging of the LTE. This increasing growth of generated data and the need to keep it for a bigger period of time has been revealing that RDBMS are no longer responding fast enough. This has been moving companies away from the RDBMS and into other alternatives. The new approaches for the increasing of data processing are based in the performance, scalability and robustness. The focus is always processing very large data sets, keeping in mind that this data sets will grow and it will always be needed a fast response from the system. Since most of the times the RDBMS are already part of a system implemented before this trend of growing data, it is necessary to keep in mind that the new approaches have to o er some solutions that facilitate the conversion of the system. And one of the solutions that is necessary to keep in mind is how a system can understand SQL semantic.
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Yang, Baojiang. "Essays on Telecommunications Management: Understanding Consumer Switch, Search and Purchase Behaviors." Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1149.
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Digitization has been pervasively reshaping the landscape of home-based telecommunication industries. The massive disruptive challenges call for telecom companies to react with efficient strategic managerial policies. Meanwhile, how consumer decision makings and welfare are impacted by such policies often remains complicated and non-transparent to policy makers. My thesis aims at leveraging large-scale empirical data to investigate the impacts of several prevalent firm initiated strategies on both sides of the market, i.e. consumers and firms. The thesis is comprised of three studies focusing on consumer switch, search and purchase behaviors. The first study, centering at consumer switching behaviors, investigates the impact of lock in shortening policies on both firm profits and consumer welfare in home-based telecommunication service market. Using household level data from a large telecommunications service provider, we show that a market level policy that shortens the lock-in period from the status quo can decrease the profits on the firms side more than it increases consumer surplus. This is majorly caused by the substantial acquisition costs associated with user switching and service initiation. As a result if regulators shorten lock-in periods but then firms respond by collaboratively increasing prices to recover their rate of return, the consumers, as the analyses indicate, may be worse off compared to the world in which lock-in periods do not change. Therefore lock-in reduction policy need to be paired with a policy precluding operators from increasing prices too much. The later two studies jointly examine consumer’s search and purchase behaviors in social environment. With a wide scope of services, telecommunication service providers can often leverage their knowledge on consumer’s social environment to reshape consumer choices. We aim to understand how consumers combine different sources of social information, one from friends versus one from the crowd, as a function of how close they are to the point of conversion. We developed a dynamic structural econometric model that jointly describes consumer information search and product purchase while taking into account sequential arrival of information and non-negligible search costs. The model is then instantiated on two connected yet distinct empirical contexts, where consumers shop for movies to watch on home screens. The first empirical context (discussed in the second study in this thesis) lies in an observational setting, where we studied individual level clickstream and transactional data from a Video-on- Demand service platform operated by a large telecommunication service provider. Later in the third study, we created an artificial movie market and leveraged a randomized web experiment to further study the research questions with more solid identification support. We find that, in both contexts, consumers seem to start by browsing products they heard about from friends. The popularity signals become more relevant when consumers getting closer to the point of purchase. The results have important managerial implications to online vendors by suggesting a reasonable strategy of providing the most valuable social information at the right time to enhance consumer shopping experiences.