Download or read book Characterization and Congestion Control for Real Time Traffic written by Mahesh R. Ramachandran and published by . This book was released on 1996 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization and Control of Network Traffic written by Chiunlin Lim and published by . This book was released on 2015 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis covers the challenges faced by network operators and network users either individually or jointly on different timescales. In the first part of the thesis, we investigate the interaction between traffic engineering and TCP. In the network layer, a network operator directly controls the traffic via traffic engineering and indirectly influences the user offered traffic via feedback signals. In the transport layer, users send traffic into the network using the TCP protocol, which adjusts offered traffic according to the received feedback. We investigate how current traffic engineering practice interact with congestion control under the network utility maximization framework. We show that the current interaction is stable, increases network utility, but does not necessarily improve the traffic engineering objective. To jointly optimize the non-convex congestion control and multipath routing problem, we note the mismatch in incentive and take on a more holistic view using game theory. With change of variables, we obtain an equivalent convex optimization problem and with suitable modification of the feedback, we show that the interaction converges to the globally optimal solution of the equivalent convex problem for users running either primal or dual algorithms. We further show that the results hold even when traffic engineering is performed at any irregular intervals. More generally, we show via heterogeneous feedback the same optimality result for a mix of users running primal and dual algorithms. In the second part of the thesis, we first lay down the framework of network traffic dynamics by specifying the governing equations for the time evolutions, dynamics and associated delays of the network elements. We next specialize the framework to study how a centrally controlled network could reconfigure its routing as quickly as possible while not incurring any congestion. As switches may update at different times and update to different traffic flows take different times to propagate through the network, transient congestion could occur when links contain a mix of traffic flows following old and new routing configurations. Using propagation delay information from the framework and incorporating timing uncertainty, we figure out which congestion scenario could occur and how long it would take any update to properly propagate through the network. We formulate a mixed-integer linear program to find fast congestion-free routing reconfiguration using timing information. We explore how we could fasten the update process as we do not have to wait for an update to fully propagate through the network. For heavily congested network, we show a fast update solution by trading off the minimal amount of traffic demand. Experiments on Mininet verify our approach and show that it outperforms prior method with no timing information. In the final part, we investigate router's inherent variation on packet processing time and its effect on interpacket delay and packet clustering. We propose a simple pipeline model incorporating the inherent variation, and two metrics, one to measure packet clustering and one to quantify inherent variation. To isolate the effect of the inherent variation, we begin our analysis with no cross traffic and step through setups where the input streams have different data rate, packet size and go through different number of hops. We show that a homogeneous input stream with a sufficiently large interpacket gap will emerge at the router's output with interpacket delays that are negatively correlated with adjacent values and have symmetrical distributions. For an input with smaller interpacket gap, the change in packet clustering is smaller while for a more clustered input, the change is also smaller and could actually go negative. We generalize our results by adding cross traffic and show how the understanding gained could be applied to engineer traffic with minimal jitter. The model analysis is validated with experiments using SoNIC, a highly precise instrument providing real-time access to the physical layer.

Download or read book Congestion Control in Data Transmission Networks written by Przemysław Ignaciuk and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Congestion Control in Data Transmission Networks details the modeling and control of data traffic in communication networks. It shows how various networking phenomena can be represented in a consistent mathematical framework suitable for rigorous formal analysis. The monograph differentiates between fluid-flow continuous-time traffic models, discrete-time processes with constant sampling rates, and sampled-data systems with variable discretization periods. The authors address a number of difficult real-life problems, such as: optimal control of flows with disparate, time-varying delay; the existence of source and channel nonlinearities; the balancing of quality of service and fairness requirements; and the incorporation of variable rate allocation policies. Appropriate control mechanisms which can handle congestion and guarantee high throughput in various traffic scenarios (with different networking phenomena being considered) are proposed. Systematic design procedures using sound control-theoretic foundations are adopted. Since robustness issues are of major concern in providing efficient data-flow regulation in today’s networks, sliding-mode control is selected as the principal technique to be applied in creating the control solutions. The controller derivation is given extensive analytical treatment and is supported with numerous realistic simulations. A comparison with existing solutions is also provided. The concepts applied are discussed in a number of illustrative examples, and supported by many figures, tables, and graphs walking the reader through the ideas and introducing their relevance in real networks. Academic researchers and graduate students working in computer networks and telecommunications and in control (especially time-delay systems and discrete-time optimal and sliding-mode control) will find this text a valuable assistance in ensuring smooth data-flow within communications networks.

Download or read book Design and Analysis for TCP friendly Window based Congestion Control written by S.-H. Choi and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current congestion control mechanisms for the Internet date back to the early 1980's and were primarily designed to stop congestion collapse with the typical traffic of that era. In recent years the amount of traffic generated by real-time multimedia applications has substantially increased, and the existing congestion control often does not opt to those types of applications. By this reason, the Internet can be fall into a uncontrolled system such that the overall throughput oscillates too much by a single flow which in turn can lead a poor application performance. Apart from the network level concerns, those types of applications greatly care of end-to-end delay and smoother throughput in which the conventional congestion control schemes do not suit. In this research, we will investigate improving the state of congestion control for real-time and interactive multimedia applications. The focus of this work is to provide fairness among applications using different types of congestion control mechanisms to get a better link utilization, and to achieve smoother and predictable throughput with suitable end-to-end packet delay.

Download or read book High Performance Backbone Network Technology written by Naoaki Yamanaka and published by CRC Press. This book was released on 2020-04-01 with total page 1067 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compiling the most influential papers from the IEICE Transactions in Communications, High-Performance Backbone Network Technology examines critical breakthroughs in the design and provision of effective public service networks in areas including traffic control, telephone service, real-time video transfer, voice and image transmission for a content delivery network (CDN), and Internet access. The contributors explore system structures, experimental prototypes, and field trials that herald the development of new IP networks that offer quality-of-service (QoS), as well as enhanced security, reliability, and function. Offers many hints and guidelines for future research in IP and photonic backbone network technologies

Download or read book Network Congestion Control written by Michael Welzl and published by John Wiley & Sons. This book was released on 2005-12-13 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the Internet becomes increasingly heterogeneous, the issue of congestion control becomes ever more important. In order to maintain good network performance, mechanisms must be provided to prevent the network from being congested for any significant period of time. Michael Welzl describes the background and concepts of Internet congestion control, in an accessible and easily comprehensible format. Throughout the book, not just the how, but the why of complex technologies including the Transmission Control Protocol (TCP) and Active Queue Management are explained. The text also gives an overview of the state-of-the-art in congestion control research and an insight into the future. Network Congestion Control: Presents comprehensive, easy-to-read documentation on the advanced topic of congestion control without heavy maths. Aims to give a thorough understanding of the evolution of Internet congestion control: how TCP works, why it works the way it does, and why some congestion control concepts failed for the Internet. Explains the Chiu/Jain vector diagrams and introduces a new method of using these diagrams for analysis, teaching & design. Elaborates on how the theory of congestion control impacts on the practicalities of service delivery. Includes an appendix with examples/problems to assist learning. Provides an accompanying website with Java tools for teaching congestion control, as well as examples, links to code and projects/bibliography. This invaluable text will provide academics and researchers in computer science, electrical engineering and communications networking, as well as students on advanced networking and Internet courses, with a thorough understanding of the current state and future evolution of Internet congestion control. Network administrators and Internet service and applications providers will also find Network Congestion Control a comprehensive, accessible self-teach tool.

Download or read book Understanding Traffic Systems written by Michael A.P. Taylor and published by Taylor & Francis. This book was released on 2017-03-02 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Road traffic and its impacts affect all aspects of modern life, leisure and industry, with safety, congestion and pollution being of greatest public concern. Transport planning increasingly emphasises travel demand management (TDM) and traffic calming - aided by dynamic, lower cost data from Intelligent Transport Systems (ITS) - to enable real time monitoring, control and traveller information. This second edition of a highly successful work has been fully updated since its first publication in 1996 to reflect developments in technology available to the traffic analyst and in the social, ecological and economic environment. New sections are included on shockwaves, data capture without surveys, traffic incidents, delay estimation, off-line use of on-line data, environmental sensitivity, and controlled crash tests. The authors introduce and demonstrate techniques with which the analyst, engineer or planner can examine traffic problems. The underlying theme is that proper understanding of traffic systems performance and traffic problems can only come from the intelligent processing, refinement, appraisal and evaluation of traffic data. Arranged in five parts, the book offers an integrated approach to tackling road traffic problems: ¢ How to gain information and understanding about traffic ¢ The theories of traffic flow ¢ The principles of good survey planning and management ¢ Specific types of traffic studies ¢ Analytical techniques for transforming raw data into useful information. Understanding Traffic Systems provides cogent insights into the techniques of traffic data collection and analysis, the application of traffic theory and the role of data in analysis and decision making. Its breadth and use of examples from several countries make it a useful reference text for students and researchers, as well as an essential tool for practising traffic engineers and planners.

Download or read book The 10th International Conference on Computer Engineering and Networks written by Qi Liu and published by Springer Nature. This book was released on 2020-10-05 with total page 1770 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a collection of the papers accepted by the CENet2020 – the 10th International Conference on Computer Engineering and Networks held on October 16-18, 2020 in Xi’an, China. The topics focus but are not limited to Internet of Things and Smart Systems, Artificial Intelligence and Applications, Communication System Detection, Analysis and Application, and Medical Engineering and Information Systems. Each part can be used as an excellent reference by industry practitioners, university faculties, research fellows and undergraduates as well as graduate students who need to build a knowledge base of the most current advances and state-of-practice in the topics covered by this conference proceedings. This will enable them to produce, maintain, and manage systems with high levels of trustworthiness and complexity.

Download or read book Highway Safety Literature written by and published by . This book was released on 1969 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Analysis of Modern Network Transport Protocol written by Ye Xia and published by . This book was released on 2003 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Safety Literature written by United States. National Highway Safety Bureau and published by . This book was released on 1969 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of a 5-volume set, each covering a broad subject, which cumulates annually all citations that appeared during the year in: Highway safety literature.

Download or read book Game Theoretic Analysis of Congestion Safety and Security written by Kjell Hausken and published by Springer. This book was released on 2014-12-31 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maximizing reader insights into the roles of intelligent agents in networks, air traffic and emergency departments, this volume focuses on congestion in systems where safety and security are at stake, devoting special attention to applying game theoretic analysis of congestion to: protocols in wired and wireless networks; power generation, air transportation and emergency department overcrowding. Reviewing exhaustively the key recent research into the interactions between game theory, excessive crowding, and safety and security elements, this book establishes a new research angle by illustrating linkages between the different research approaches and serves to lay the foundations for subsequent analysis. Congestion (excessive crowding) is defined in this work as all kinds of flows; e.g., road/sea/air traffic, people, data, information, water, electricity, and organisms. Analysing systems where congestion occurs – which may be in parallel, series, interlinked, or interdependent, with flows one way or both ways – this book puts forward new congestion models, breaking new ground by introducing game theory and safety/security into proceedings. Addressing the multiple actors who may hold different concerns regarding system reliability; e.g. one or several terrorists, a government, various local or regional government agencies, or others with stakes for or against system reliability, this book describes how governments and authorities may have the tools to handle congestion, but that these tools need to be improved whilst additionally ensuring safety and security against various threats. This game-theoretic analysis sets this two volume book apart from the current congestion literature and ensures that the work will be of use to postgraduates, researchers, 3rd/4th-year undergraduates, policy makers, and practitioners.

Download or read book Adaptive Rate Based Congestion Control for Real time Traffic written by Attique Ahmad and published by . This book was released on 1994 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Real time Coordinated actuated Traffic Control During Congested Conditions written by Nadeem A. Chaudhary and published by . This book was released on 1997 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mining and Control of Network Traffic by Computational Intelligence written by Federico Montesino Pouzols and published by Springer. This book was released on 2011-02-05 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: As other complex systems in social and natural sciences as well as in engineering, the Internet is hard to understand from a technical point of view. Packet switched networks defy analytical modeling. The Internet is an outstanding and challenging case because of its fast development, unparalleled heterogeneity and the inherent lack of measurement and monitoring mechanisms in its core conception. This monograph deals with applications of computational intelligence methods, with an emphasis on fuzzy techniques, to a number of current issues in measurement, analysis and control of traffic in the Internet. First, the core building blocks of Internet Science and other related networking aspects are introduced. Then, data mining and control problems are addressed. In the first class two issues are considered: predictive modeling of traffic load as well as summarization of traffic flow measurements. The second class, control, includes active queue management schemes for Internet routers as well as window based end-to-end rate and congestion control. The practical hardware implementation of some of the fuzzy inference systems proposed here is also addressed. While some theoretical developments are described, we favor extensive evaluation of models using real-world data by simulation and experiments.

Download or read book Traffic and Performance Engineering for Heterogeneous Networks written by Demetres D. Kouvatsos and published by River Publishers. This book was released on 2009 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterogeneous Networks: Traffic Engineering, Performance Evaluation Studies and Tools describes recent advances in networks of diverse technology reflecting the state-of-the-art technology and research achievements in traffic engineering, performance evaluation studies and tools worldwide.

Download or read book Future Mobile Transport Protocols written by Thomas Pötsch and published by Springer. This book was released on 2016-08-25 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thomas Pötsch investigates the channel properties of cellular networks and analyzes the effects that cause inefficient performance of legacy congestion control protocols, such as TCP and its variants, on cellular networks. Inspired by the findings, a novel delay-based congestion control protocol called Verus is proposed and evaluated across a variety of network scenarios. Furthermore, the author develops a stochastic two-dimensional discrete-time Markov modeling approach that dramatically simplifies the understanding of delay-based congestion control protocols.