Rozprawy doktorskie na temat „Network control protocol”
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Nguyen, Long G. "Designing a higher layer protocol for small distributed microcontroller systems using the control area network protocol". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1998. https://ro.ecu.edu.au/theses/1603.
Pełny tekst źródłaIyengar, Janardhan R. "End-to-end concurrent multipath transfer using transport layer multihoming". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.67 Mb., p. 123, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3220807.
Pełny tekst źródłaBrownfield, Michael I. "Energy-efficient Wireless Sensor Network MAC Protocol". Diss., This resource online, 2006. http://scholar.lib.vt.edu/theses/available/etd-04102006-170423/.
Pełny tekst źródłaLai, Chengdi, i 赖成迪. "Congestion control for transmission control protocol (TCP) in wirelessnetworks". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47102445.
Pełny tekst źródłapublished_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy
Halepoto, Imtiaz Ali. "Scheduling and flow control in CMT-SCTP". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/210189.
Pełny tekst źródłaChe, Xianhui. "Control protocol for optical packet switched local area network". Thesis, University of Essex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438262.
Pełny tekst źródłaChung, Jae Won. "Congestion control for streaming media". Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-081805-084831/.
Pełny tekst źródłaKeywords: streaming media; streaming transport protocol; active queue management (AQM); Internet congestion control. Includes bibliographical references (p. 236-248).
Cox, Spencer L. "User Datagram Protocol with Congestion Control". Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1250.pdf.
Pełny tekst źródłaZhou, Kaiyu. "Packet loss models of the Transmission Control Protocol". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36873172.
Pełny tekst źródłaZhou, Kaiyu, i 周開宇. "Packet loss models of the Transmission Control Protocol". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36873172.
Pełny tekst źródłaBickhart, Ryan W. "Transparent TCP-to-SCTP translation shim layer". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 0.44 Mb, 82 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/1428177.
Pełny tekst źródła梁鉅輝 i Kui-fai Leung. "Enhancing transmission control protocol performance over wireless networks". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31227570.
Pełny tekst źródłaEddy, Wesley M. "Improving Transport Control Protocol Performance With Path Error Rate Information". Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1087844627.
Pełny tekst źródłaJourjon, Guillaume Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Towards a versatile transport protocol". Awarded by:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/41480.
Pełny tekst źródłaShi, Xiaohan. "A reliable real-time transport protocol for networked control systems over wireless networks". Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/60160/1/Xiaohan_Shi_Thesis.pdf.
Pełny tekst źródłaLi, Kang. "Modeling the bandwidth sharing behavior of congestion controlled flows /". Full text open access at:, 2002. http://content.ohsu.edu/u?/etd,632.
Pełny tekst źródłaAbou-Zeid, Al-Hussein A. "Stochastic models of congestion control in heterogeneous next generation packet networks /". Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5994.
Pełny tekst źródłaLe, Dinh Tuan Computer Science & Engineering Faculty of Engineering UNSW. "Data reliability control in wireless sensor networks for data streaming applications". Publisher:University of New South Wales. Computer Science & Engineering, 2009. http://handle.unsw.edu.au/1959.4/43328.
Pełny tekst źródłaKuditipudi, Sasank. "Simulation for non-congestion losses control over Mobile Ad-Hoc Network using Transmission Control Protocol". Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10007412.
Pełny tekst źródłaMobile Ad-hoc Network (MANET) is a group of individual mobile nodes that exhibit mobility, which results in network congestion. The nodes in MANET are continuously moving with change in network topology that results in significant network congestion. Transmission Control Protocol (TCP) is the most popular connection oriented transport layer protocol used today. The TCP when applied over MANET faces challenges, such as congestion and non-congestion losses. We are concentrating to distinguish between these losses and overcome the non-congestion losses.
The current project presents results on the performance evaluation of various TCP implementations, as measured in terms of the following parameters: end-to-end delay; throughput; network overhead; and packet delivery ratio. Simulations of applying the various TCP schemes over MANET have been performed using the Network Simulator (NS2), and simulation results including comparisons between the different TCP schemes are presented.
Medina, Andres. "Statistical approach to neighborhood congestion control in ad hoc wireless networks". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 54 p, 2008. http://proquest.umi.com/pqdweb?did=1456291921&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Pełny tekst źródłaGui, Li. "A transport protocol for real-time applications in wireless networked control systems". Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/45460/1/Li_Gui_Thesis.pdf.
Pełny tekst źródłaChen, Shi. "An energy-efficient media access control protocol for wireless sensor networks /". View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?COMP%202006%20CHEN.
Pełny tekst źródłaLarsen, Timothy Scott. "Studying the Performance of Wireless Mesh Networks Using the HxH Transport Control Protocol". Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3375.pdf.
Pełny tekst źródłaShen, Ji. "Efficient 3G multimedia communication control protocol (H.245) and implementations /". access full-text access abstract and table of contents, 2005. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?mphil-cs-b19886093a.pdf.
Pełny tekst źródła"Submitted to Department of Computer Science in partial fulfillment of the requirements for the degree of Master of Philosophy" Includes bibliographical references (leaves 110-112)
Alazemi, Hamed M. K. "Modeling and analysis of stochastic self-similar processes and TCP/IP congestion control in high-speed computer communication networks /". Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/6000.
Pełny tekst źródłaShah, Niravkumar. "Efficient medium access control protocol for vehicular ad-hoc networks". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/495.
Pełny tekst źródłaBiswas, Md Israfil. "Internet congestion control for variable-rate TCP traffic". Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182264.
Pełny tekst źródłaOlsén, Jörgen. "Stochastic modeling and simulation of the TCP protocol /". Uppsala : Matematiska institutionen, Univ. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3534.
Pełny tekst źródłaScofield, Dan. "Hop-by-hop transport control for multi-hop wireless networks /". Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1812.pdf.
Pełny tekst źródłaMorrison, Charles Michael. "An investigation of network efficiency and control protocol issues for a configurable collaboration support system". Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185931.
Pełny tekst źródłaSanti, Juliana de 1982. "Gerenciamento ativo de filas para o protocolo "High Speed Transmission Control Protocol" em redes com produto banda-atraso elevado". [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276151.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: A utilização eficiente da banda passante em redes de alta velocidade e grandes atrasos, denominadas redes com produto banda-atraso elevado (PBA), tornou-se um grande desafio. Isto ocorre devido aos ajustes do protocolo Transmission Control Protocol (TCP). O High Speed TCP (HSTCP), uma variante do TCP para redes com PBA elevado, emprega ajustes mais agressivos permitindo, assim, que a utilização da banda seja escalável. As políticas de Gerenciamento Ativo de Filas ou Active Queue Management (AQM), monitoram o nível de ocupação das filas nos roteadores e notificam o congestionamento incipiente aos emissores TCP através do descarte/marcação de pacotes. O sistema de controle de congestionamento apresenta natureza de retroalimentação, na qual a taxa de transmissão dos nós fontes é ajustada em função do nível de ocupação da fila. Os controladores AQM determinam a probabilidade de descarte/marcação para maximizar a vazão e minimizar perdas, garantindo, assim, a estabilidade do tamanho da fila independentemente das variações das condições da rede. Neste trabalho, define-se a política de gerenciamento ativo de filas HSTCP-H2 para redes com PBA elevado que utilizam o protocolo HSTCP. Para a derivação de HSTCPH2: são utilizadas técnicas de Teoria de Controle Ótimo. A principal característica desta política é considerar o atraso do sistema o que permite melhor utilização dos recursos disponíveis. A estabilidade e os objetivos de desempenho do sistema são expressos e solucionados através de Desigualdades Matriciais Lineares, permitindo que os parâmetros do controlador possam ser calculados através da solução de um problema convexo simples. Diferentes controladores foram derivados considerando-se diferentes objetivos de desempenho, os quais consideram as características de redes com produto banda-atraso elevado. Através de simulações, os desempenhos dos controladores derivados são avaliados e a eficácia do controlador que apresentou o melhor desempenho foi comparado com o desempenho da política de AQM RED. São considerados cenários com enlace gargalo único e com múltiplos gargalos.
Abstract: The efficient utilization of bandwidth in high speed and large delay networks, called high bandwidth-delay product networks (BDP), has become a major challenge. This is due to adjustments of the Transmission Control Protocol (TCP). The High Speed TCP HSTCP): a TCP variant to high BDP networks, employs more aggressive adjustments, allowing scalable bandwidth utilization. The Active Queue Management (AQM) policies monitor the queue length in the routers and notify incipient congestion to TCP source by marking or dropping packets. The congestion control system presents intrinsic feedback nature, where the transmission rates of the sources are adjusted according to the level of congestion inferred by the queue occupancy. The AQM controllers determine the dropping marking probability values to maximize throughput and minimize losses, giving guarantees to stabilize the queue length independent of network conditions. In this work, it is defined HSTCP-H2, an active queue management policy to high BDP networks, which adopt the HSTCP as their transport protocol. Optimal control theory is used to conceive HSTCP-H2. The novelty of the proposed approach lies in consider the delay of the system which allows better use of available resources. Furthermore, in the proposed approach, stability and performance objectives are completely expressed as Linear Matrix Inequalities (LMIs), thus requiring the solution of a single convex problem for the computation of the controller parameters. Different controllers are derived considering different design goals, which take into account the characteristics of the high bandwidth-delay product networks. The performance produced by different optimal controllers was investigated. The efficacy of the controller with the best performance was then compared to the performance of RED policy. The simulation experiments were carried out using topologies with single and multiple bottleneck.
Mestrado
Redes de Computadores
Mestre em Ciência da Computação
Miller, Alan Henry David. "Best effort measurement based congestion control". Thesis, Connect to e-thesis, 2001. http://theses.gla.ac.uk/1015/.
Pełny tekst źródłaIncludes bibliographical references (p.i-xv). Print version also available. Mode of access : World Wide Web. System requirments : Adobe Acrobat reader reuired to view PDF document.
Reddy, Pavan K. "Implementation of an available bit rate service for satellite IP networks using a performance enhancing proxy". Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0429104-100149/.
Pełny tekst źródłaXiao, Chunpeng. "Advanced link and transport control protocols for broadband optical access networks". Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11082006-183908/.
Pełny tekst źródłaChang, Gee-Kung, Committee Chair ; Zhou, G.Tong, Committee Member ; Copeland, John, Committee Member ; Riley, George, Committee Member ; Ingram, Mary Ann, Committee Member ; Ammar, Mostafa, Committee Member.
Allman, Mark. "Improving TCP performance over satellite channels". Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177615641.
Pełny tekst źródłaJero, Samuel C. "Performance Analysis of the Datagram Congestion Control Protocol DCCP for Real-Time Streaming Media Applications". Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1374854584.
Pełny tekst źródłaNandwani, Mukta. "Real-time Remote Visualization of Scientific Data". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/33138.
Pełny tekst źródłaMaster of Science
Hirayama, Yasuhiro, Hiraku Okada, Takaya Yamazato i Masaaki Katayama. "An Access Control Protocol based on Estimation of Multimedia Trafic with an Adpative Algorithm in CDMA Packet Network". IEEE, 2002. http://hdl.handle.net/2237/7808.
Pełny tekst źródłaAugustin, Angelika. "Effective Power Consumption in MAC Protocols for Wireless Sensor Networks". Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-286.
Pełny tekst źródłaWireless sensor networks offer easy implementation, flexibility and mobility of hand held
devices. Sensors consist of an internal power source, which is the great limitation for
the life time and the usage of sensor networks. To increase the life time, sensors should
stay in energy saving sleep mode as long as possible, because in sleep mode the radio is
either shut down or working with less energy. Better energy handling is implemented in
different power saving mechanism of common Medium Access Control protocols, which are
evaluated and analyzed and further extensions and ideas to improve the energy efficiency
are presented. Slotted PSM is simulated with the NS2 and compared to the WLAN 802.11
PSM technology and the results show that energy efficiency and power consumption are
much better implemented and life time increases with the use of Slotted PSM.
Lima, Michele Mara de Araujo Espindula. "Projeto de controladores otimos para gerenciamento ativo de filas". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276334.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: A ocorrência de congestionamento degrada o desempenho das redes de computadores. Dentre as conseqüências negativas da sua ocorrência cita-se a diminuição da vazão, a perda de pacotes, e o aumento do atraso. Para prevenir e controlar o congestionamento, o protocolo Transmission Control Protocol (TCP) varia a taxa de transmissão de dados de acordo com o nível de congestionamento existente. As políticas de Gerenciamento Ativo de Filas, do Inglês Active Queue Management (AQM), monitoram o nível de ocupação das filas, afim de notificar o congestionamento incipiente aos nós emissores. Esta notificação é realizada através da marca¸c¿ao ou do descarte de pacotes. O sistema de controle de congestionamento em redes TCP/IP, pode ser visto como um sistema de controle por retroalimentação, no qual, a taxa de transmissão dos n'os fontes é ajustada de acordo com o nível de ocupação da fila. Os controladores para o gerenciamento ativo de filas determinam o valor da probabilidade de descarte ou de marcação, buscando a maximização da vazão e a minimiza¸c¿ao das perdas, garantindo, assim, a estabilidade do tamanho da fila independentemente das variações das condições da rede. Nesta tese, são utilizadas técnicas da teoria de controle ótimo para definir uma política ótima de gerenciamento ativo de filas, denominada H2-AQM. A principal característica da H2-AQM é o uso de controladores não racionais, superando-se, assim, a dificuldade de se incorporar no projeto do controlador a garantia de estabilidade em relação ao atraso da retroalimentação. Outrossim, a estabilidade e os objetivos de desempenho do sistema são completamente expressos e solucionados através de desigualdades matriciais lineares, permitindo que os parâmetros do controlador possam ser calculados através da solução de um problema convexo simples. Diferentes controladores operando no mesmo ponto de equilíbrio definem diferentes caminhos entre um ponto qualquer de operação do sistema e o ponto de equilíbrio. Por outro lado, o caminho percorrido para atingir a estabilidade depende dos objetivos usados para projetar o controlador. Nesta tese, é discutida, também, a escolha dos objetivos do projeto de um controlador ótimo para o gerenciamento ativo de filas. Os desempenhos dos diferentes controladores são avaliados e a eficácia do controlador que apresentou o melhor desempenho foi comparado com o desempenho das políticas RED e PI-AQM
Abstract: Congestion is one of the most significant problems in networking. When congestion occurs, the network performance degrades, leading to throughput decrease, delay increase and packet losses. In order to avoid congestion the Transmission Control Protocol (TCP) changes its transmission rate according to the level of congestion. AQM policies notify incipient congestion to TCP source by marking or dropping packets. In TCP/ICP networks, congestion control system can be viewed as a feedback control system in which the transmission rate of the sources are adjusted according to the level of congestion inferred by the queue occupancy. Controllers are responsible for determining the appropriate value of the dropping/marking probability values that stabilizes the queue size regardless of the network condition. In this thesis, optimal control theory is used to conceive an optimal AQM policy, called H2-AQM. The novelty of the proposed approach lies in the use of non-rational controllers that overcomes the difficulty of incorporating guarantees of the stability with respect to the delayed part of the system in the controller design. Furthermore, in the proposed approach stability and performance objectives are completely expressed as Linear Matrix Inequalities (LMIs), thus requiring the solution of a single convex problem for the computation of the controller parameters. Different controllers define different pathes for taking the system state to a target point of equilibrium. Moreover, the path depends on the objectives established for the design of the controller. In this thesis, a discussion on the design of AQM optimal controllers for optimal performance is also presented. The performance produced by different optimal controllers was investigated. The efficacy of the controller which presented the best performance was, then, compared to the performance of both RED and PI-AQM policies
Doutorado
Redes de Computadores
Doutor em Ciência da Computação
Augusto, Leonardo Rangel. "Controladores otimos para gerenciamento ativo de filas na arquitetura de serviços diferenciados da Internet". [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276179.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: A classe de Serviço Assegurado da arquitetura de Serviços Diferenciados (DiffServ) da Internet inclui a provisão de diferenciação de banda passante, o que depende do adequado USG de mecanismos de condicionamento de tráfego e gerenciamento ativo de filas (AQM). Nesta dissertação, propõe-se um controlador ótimo para gerenciamento ativo de filas para a arquitetura Diffserv. Seu projeto considera intrinsecamente a influência de fluxos não adaptativos na dinâmica do controle de congestionamento. Apesar de o controlador obtido ser racional, seu projeto utiliza uma abordagem não-racional, o que aumenta a precisão do modelo. Simulações conduzidas demonstram que o controlador proposto reduz o descarte desnecessário de pacotes, aumentando o goodput e diminuindo a quantidade de RTOs dos emissores TCP.
Abstract: The Assured Service of Differentiated Services Arehitecture (DiffServ) is currently used for providing throughput differentiation in the Internet. For this, traffic policing and active queue management (AQM) mechanisms must be used. In this dissertation, we use a non-rational approach to develop an optimal AQM controller. Its design considers both adaptative and non-adaptative like UDP. Simulations were conducted for comparison with other proposals. Results show that the proposed controller reduces unnecessary packet drops, increases the goodput and reduces the TCP sender's Retransmission Timeouts.
Mestrado
Redes de Computadores
Mestre em Ciência da Computação
Hurtig, Per. "Improving the Timeliness of SCTP Message Transfers". Licentiate thesis, Karlstad : Faculty of Economic Sciences, Communication and IT, Computer Science, Karlstads universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2861.
Pełny tekst źródłaIrwin, Barry Vivian William. "A framework for the application of network telescope sensors in a global IP network". Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1004835.
Pełny tekst źródłaOlsén, Jörgen. "Stochastic Modeling and Simulation of the TCP protocol". Doctoral thesis, Uppsala University, Mathematical Statistics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3534.
Pełny tekst źródłaThe success of the current Internet relies to a large extent on a cooperation between the users and the network. The network signals its current state to the users by marking or dropping packets. The users then strive to maximize the sending rate without causing network congestion. To achieve this, the users implement a flow-control algorithm that controls the rate at which data packets are sent into the Internet. More specifically, the Transmission Control Protocol (TCP) is used by the users to adjust the sending rate in response to changing network conditions. TCP uses the observation of packet loss events and estimates of the round trip time (RTT) to adjust its sending rate.
In this thesis we investigate and propose stochastic models for TCP. The models are used to estimate network performance like throughput, link utilization, and packet loss rate. The first part of the thesis introduces the TCP protocol and contains an extensive TCP modeling survey that summarizes the most important TCP modeling work. Reviewed models are categorized as renewal theory models, fixed-point methods, fluid models, processor sharing models or control theoretic models. The merits of respective category is discussed and guidelines for which framework to use for future TCP modeling is given.
The second part of the thesis contains six papers on TCP modeling. Within the renewal theory framework we propose single source TCP-Tahoe and TCP-NewReno models. We investigate the performance of these protocols in both a DropTail and a RED queuing environment. The aspects of TCP performance that are inherently depending on the actual implementation of the flow-control algorithm are singled out from what depends on the queuing environment.
Using the fixed-point framework, we propose models that estimate packet loss rate and link utilization for a network with multiple TCP-Vegas, TCP-SACK and TCP-Reno on/off sources. The TCP-Vegas model is novel and is the first model capable of estimating the network's operating point for TCP-Vegas sources sending on/off traffic. All TCP and network models in the contributed research papers are validated via simulations with the network simulator ns-2.
This thesis serves both as an introduction to TCP and as an extensive orientation about state of the art stochastic TCP models.
Morgan, Jon, i Charles H. Jones. "PCM Backfill: Providing PCM to the Control Room Without Dropouts". International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577490.
Pełny tekst źródłaOne of the initial control room capabilities to be demonstrated by iNET program is the ability to provide data displays in the control room that do not contain data dropouts. This concept is called PCM Backfill where PCM data is both transmitted via traditional SST and recorded onboard via an iNET compatible recorder. When data dropouts occur, data requests are made over the telemetry network to the recorder for the missing portions of the PCM data stream. The retrieved data is sent over the telemetry network to the backfill application and ultimately delivered to a pristine data display. The integration of traditional SST and the PCM Backfill capability provides both real-time safety of flight data side-by-side with pristine data suitable for advanced analysis.
Amoah, Raphael. "Formal security analysis of the DNP3-Secure Authentication Protocol". Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/93798/1/Raphael_Amoah_Thesis.pdf.
Pełny tekst źródłaGautam, S. Vijay. "Performance Analysis Of A Variation Of The Distributed Queueing Access Protocol". Thesis, Indian Institute of Science, 1995. https://etd.iisc.ac.in/handle/2005/149.
Pełny tekst źródłaGautam, S. Vijay. "Performance Analysis Of A Variation Of The Distributed Queueing Access Protocol". Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/149.
Pełny tekst źródłaBen, Ameur Chiheb. "TCP Protocol Optimization for HTTP Adaptive Streaming". Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S127/document.
Pełny tekst źródłaHTTP adaptive streaming (HAS) is a streaming video technique widely used over the Internet. It employs Transmission Control Protocol (TCP) as transport protocol and it splits the original video inside the server into segments of same duration, called "chunks", that are transcoded into multiple quality levels. The HAS player, on the client side, requests for one chunk each chunk duration and it commonly selects the quality level based on the estimated bandwidth of the previous chunk(s). Given that the HAS clients are located inside access networks, our investigation involves several HAS clients sharing the same bottleneck link and competing for bandwidth. Here, a degradation of both Quality of Experience (QoE) of HAS users and Quality of Service (QoS) of the access network are often recorded. The objective of this thesis is to optimize the TCP protocol in order to solve both QoE and QoS degradations. Our first contribution consists of proposing a gateway-based shaping method, that we called Receive Window Tuning Method (RWTM); it employs the TCP flow control and passive round trip time estimation on the gateway side. We compared the performances of RWTM with another gateway-based shaping method that is based on queuing discipline, called Hierarchical Token Bucket shaping Method (HTBM). The results of evaluation indicate that RWTM outperforms HTBM not only in terms of QoE of HAS but also in terms of QoS of access network by reducing the queuing delay and significantly reducing packet drop rate at the bottleneck.Our second contribution consists of a comparative evaluation when combining two shaping methods, RWTM and HTBM, and four very common TCP variants, NewReno, Vegas, Illinois and Cubic. The results show that there is a significant discordance in performance between combinations. Furthermore, the best combination that improves performances in the majority of scenarios is when combining Illinois variant with RWTM. In addition, the results reveal the importance of an efficient updating of the slow start threshold value, ssthresh, to accelerate the convergence toward the best feasible quality level. Our third contribution consists of proposing a novel HAS-based TCP variant, that we called TcpHas; it is a TCP congestion control algorithm that takes into consideration the specifications of HAS flow. Besides, it estimates the optimal quality level of its corresponding HAS flow based on end-to-end bandwidth estimation. Then, it permanently performs HAS traffic shaping based on the encoding rate of the estimated level. It also updates ssthresh to accelerate convergence speed. A comparative performance evaluation of TcpHas with a recent and well-known TCP variant that employs adaptive decrease mechanism, called Westwood+, was performed. Results indicated that TcpHas largely outperforms Westwood+; it offers better quality level stability on the optimal quality level, it dramatically reduces the packet drop rate and it generates lower queuing delay
Arumaithurai, Mayutan [Verfasser], Xiaoming [Akademischer Betreuer] Fu, K. K. [Akademischer Betreuer] Ramakrishnan i Dieter [Akademischer Betreuer] Hogrefe. "Network Friendly Congestion Control: Framework, Protocol Design and Evaluation / Mayutan Arumaithurai. Gutachter: Xiaoming Fu ; K. K. Ramakrishnan ; Dieter Hogrefe. Betreuer: Xiaoming Fu". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2010. http://d-nb.info/1043029532/34.
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