Download or read book Reliability Management Framework for Softwarized Networks written by Haihong Zhu and published by . This book was released on 2021 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Software-Defined Networking (SDN) technologies promise to enhance the performance, reliability, and cost of managing both wired and wireless network infrastructures, functions, controls, and services (i.e., Internet of Things). However, centralized reliability management in Softwareization architecture poses both scalability and latency challenges. Significantly, the current OpenFlow Discovery Protocol (OFDP) in SDN induces substantial scalability, accuracy, and latency hurdles due to its gossipy, centralized, periodic, and tardy protocol. This dissertation proposes a novel reliability management framework, which efficiently orchestrates different reliability monitoring mechanisms over SDN networks and synchronizes the control messages among various applications. The proposed framework facilitates multiple discovery frequency timers for each target over different stratum instead of using a uniform discovery timer for the entire network. It supports many common reliability monitoring factors for registered applications by analyzing offline and online network architecture information such as network topologies, traffic flows, virtualization architectures, and protocols. The framework consists of a high availability registration platform (HARP) and the topology-aware reliability management (TARman) and Bug Detection, Debugging, and Isolation (BuDDI) protocol facilities. The reliability management framework is implemented on both Ryu and Cisco’s OpenDayLight (ODL) controllers. Extensive Mininet experimental results validate that framework significantly improves discovery message efficiency and makes the control traffic less bursty than OFDP with a uniform timer. It also reduces the network status discovery delay without increasing the control overhead. Our reliability management framework also proposes a novel network reliability cost model to ensure that the SLA covers customer service impact and damage. We classify network outages and calculate their effect on the network services to formulate a cost-based model. Besides, we have performed evaluations using various campus network outage scenarios. The proposed cost-based model enables customers to identify the service impact of unplanned network outages to their networks instead of entirely depending on the service provider’s data.

Download or read book Toward a Reliable Network Management Framework written by Haymanot Gebre-Amlak and published by . This book was released on 2018 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: As our modern life is very much dependent on the Internet, measurement and management of network reliability is critical. Understanding the health of a network via outage and failure analysis is especially essential to assess the reliability of a network, identify problem areas for network reliability improvement, and characterize the network behavior accurately. However, little has been known on characteristics of node outages and link failures in access networks. In this dissertation, we carry out an in-depth outage and failure analysis of a university campus network using a rich set of node outage and link failure data and topology information over multiple years. We investigated the diverse statistical characteristics of both wired and wireless networks using big data analytic tools for network management. Furthermore,we classify the different types of network failures and management issues and their strategic resolution. While the recent adoption of Software-Defined Networking (SDN) and softwarization of network functions and controls ease network reliability, management, and various network-level service deployments, the task of monitoring network reliability is still very challenging. We find it challenging because it not only requires vast measuring and processing resources but also introduces an additional intermediate network, so-called a ’control-path network’, that physically connects the control and data plane networks. We proposed a topology-aware network management framework that utilizes Link Layer Discovery Protocol (LLDP) messages via prudent control of the frequency of LLDP messages and considering tier-based network architecture. It provides fast and effective reliability information for faster recovery from failures. The topology-aware analysis also enables us to explore the economic impact and the cost of various types of network failures with regards to Capital Expenditure (CapEx) and Operational Expenditure (OpEx). Wireless LAN (Local Area Network) or Wi-Fi has become the primary mode of network access for most users; thus, its performance measurement becomes a critical part of network management in access networks. Through large-scale, extensive analysis of a university campus Wi-Fi network, we found its performance behavior and management issues are very distinctive from a wired network. The study also informs a strategic Wi-Fi Access Point deployment and enhanced Wi-Fi association scheme for better coverage and enhanced user experience. Most of the current and future networks would involve both wired and wireless subnets. Our work of understanding the unique issues of each one and their interplay would shed light on managing and improving network reliability in a holistic manner.

Download or read book System Reliability Management written by Adarsh Anand and published by CRC Press. This book was released on 2018-09-21 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the latest research advances in the field of system reliability assurance and engineering. It contains reference material for applications of reliability in system engineering, offering a theoretical sound background with adequate numerical illustrations. Included are concepts pertaining to reliability analysis, assurance techniques and methodologies, tools, and practical applications of system reliability modeling and allocation. The collection discusses various soft computing techniques like artificial intelligence and particle swarm optimization approach for reliability assessment. Importance of differentiating between the optimal release time and testing stop time of the software has been explicitly discussed and presented in the book. Features: Creates understanding of the costs associated with complex systems Covers reliability measurement of engineering systems Incorporates an efficient effort-based expenditure policy incorporating cost and reliability criteria Provides information for optimal testing stop and release time of software system Presents software performance and security layout Addresses reliability prediction and its maintenance through advanced analytics techniques Overall, System Reliability Management: Solutions and Techniques is a collaborative and interdisciplinary approach for better communication of problems and solutions to increase the performance of the system for better utilization and resource management.

Download or read book Next Generation and Advanced Network Reliability Analysis written by Syed Riffat Ali and published by Springer. This book was released on 2018-11-19 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers reliability assessment and prediction of new technologies such as next generation networks that use cloud computing, Network Function Virtualization (NVF), Software Defined Network (SDN), Next Generation Transport, Evolving Wireless Systems, Digital VoIP Telephony, and Reliability Testing techniques specific to Next Generation Networks (NGN). This book introduces the technology to the reader first, followed by advanced reliability techniques applicable to both hardware and software reliability analysis. The book covers methodologies that can predict reliability using component failure rates to system level downtimes. The book’s goal is to familiarize the reader with analytical techniques, tools and methods necessary for analyzing very complex networks using very different technologies. The book lets readers quickly learn technologies behind currently evolving NGN and apply advanced Markov modeling and Software Reliability Engineering (SRE) techniques for assessing their operational reliability. Covers reliability analysis of advanced networks and provides basic mathematical tools and analysis techniques and methodology for reliability and quality assessment; Develops Markov and Software Engineering Models to predict reliability; Covers both hardware and software reliability for next generation technologies.

Download or read book Building a Reliable and Secure Management Framework for Software defined Networks written by Faheed A.F. Alenezi and published by . This book was released on 2021 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Software-Defined Networking (SDN) technologies promise to enhance the performance and cost of managing both wired and wireless network infrastructures, functions, controls, and services (i.e., Internet of Things). However, centralized management in softwarization architecture poses new security, reliability, and scalability challenges. Significantly, the current OpenFlow Discovery Protocol (OFDP) in SDN induces substantial issues due to its gossipy, centralized, periodic, and tardy protocol. Furthermore, the problems are aggravated in the wireless and mobile SDN due to the dynamic topology churns and the lack of link-layer discovery methods. In this work, we tackle both security and reliability management issues in SDN. Specifically, we design and build a novel multitemporal cross-stratum discovery proto- col framework, which efficiently orchestrates different reliability monitoring mechanisms over SDN networks and synchronizes the control messages among various applications. It facilitates multiple discovery frequency timers for each target over different stratum instead of using a uniform discovery timer for the entire network. It supports many common reliability monitoring factors for registered applications by analyzing offline and online network architecture information such as network topologies, traffic flows, virtualization architectures, and protocols. The framework consists of traffic-aware discovery (TaDPole), and centrality-aware protocol (CAMLE) facilities. We implemented the framework on Ryu controller. Extensive Mininet experimental results validate that the framework significantly improves discovery message efficiency and makes the control traffic less bursty than OFDP with a uniform timer. It also reduces the network status discovery delay without increasing the control overhead. We then evaluated the security issues in SDN and proposed an SDN-based Wormhole Analysis using the Neighbor Similarity (SWANS) approach as a novel wormhole countermeasure in a Software-defined MANET. As SWANS analyses the similarity of neighbor counts at a centralized SDN controller, it apprehends wormholes not only without requiring any particular location information but also without causing significant communication and coordination overhead. SWANS also countermeasures various false-positive and false-negative scenarios generated by the Link Layer Discovery Protocol (LLDP) vulnerability. We performed extensive studies via both analysis and simulations. Our simulation results show that SWANS can detect wormhole attacks efficiently with low false-positive and false-negative rates.

Download or read book Reliability of Computer Systems and Networks written by Martin L. Shooman and published by John Wiley & Sons. This book was released on 2003-04-08 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: With computers becoming embedded as controllers in everything from network servers to the routing of subway schedules to NASA missions, there is a critical need to ensure that systems continue to function even when a component fails. In this book, bestselling author Martin Shooman draws on his expertise in reliability engineering and software engineering to provide a complete and authoritative look at fault tolerant computing. He clearly explains all fundamentals, including how to use redundant elements in system design to ensure the reliability of computer systems and networks. Market: Systems and Networking Engineers, Computer Programmers, IT Professionals.

Download or read book Software Reliability Methods written by Doron A. Peled and published by Springer Science & Business Media. This book was released on 2001-06-26 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents current methods for dealing with software reliability, illustrating the advantages and disadvantages of each method. The description of the techniques is intended for a non-expert audience with some minimal technical background. It also describes some advanced techniques, aimed at researchers and practitioners in software engineering. This reference will serve as an introduction to formal methods and techniques and will be a source for learning about various ways to enhance software reliability. Various projects and exercises give readers hands-on experience with the various formal methods and tools.

Download or read book Guide to Disaster Resilient Communication Networks written by Jacek Rak and published by Springer Nature. This book was released on 2020-07-22 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative volume presents a comprehensive guide to the evaluation and design of networked systems with improved disaster resilience. The text offers enlightening perspectives on issues relating to all major failure scenarios, including natural disasters, disruptions caused by adverse weather conditions, massive technology-related failures, and malicious human activities. Topics and features: describes methods and models for the analysis and evaluation of disaster-resilient communication networks; examines techniques for the design and enhancement of disaster-resilient systems; provides a range of schemes and algorithms for resilient systems; reviews various advanced topics relating to resilient communication systems; presents insights from an international selection of more than 100 expert researchers working across the academic, industrial, and governmental sectors. This practically-focused monograph, providing invaluable support on topics of resilient networking equipment and software, is an essential reference for network professionals including network and networked systems operators, networking equipment vendors, providers of essential services, and regulators. The work can also serve as a supplementary textbook for graduate and PhD courses on networked systems resilience.

Download or read book A Framework for Software Reliability Management Based on the Software Development Profile Model written by Arya Khoshkhou and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Practical System Reliability written by Eric Bauer and published by Wiley-IEEE Press. This book was released on 2009-04-13 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Software Reliability Program Standard written by G-11R, Reliability Committee and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Standard provides a framework for the management of software reliability within system reliability requirements. It is based around the Software Reliability Plan and Software Reliability Case and emphasizes the importance of evaluating progress towards meeting software reliability requirements throughout the project life-cycle.

Download or read book Multimedia Streaming in SDN NFV and 5G Networks written by Alcardo Barakabitze and published by John Wiley & Sons. This book was released on 2022-12-06 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multimedia Streaming in SDN/NFV and 5G Networks A comprehensive overview of Quality of Experience control and management of multimedia services in future networks In Multimedia Streaming in SDN/NFV and 5G Networks, renowned researchers deliver a high-level exploration of Quality of Experience (QoE) control and management solutions for multimedia services in future softwarized and virtualized 5G networks. The book offers coverage of network softwarization and virtualization technologies, including SDN, NFV, MEC, and Fog/Cloud Computing, as critical elements for the management of multimedia services in future networks, like 5G and 6G networks and beyond. Providing a fulsome examination of end-to-end QoE control and management solutions in softwarized and virtualized networks, the book concludes with discussions of probable future challenges and research directions in emerging multimedia services and applications, 5G network management and orchestration, network slicing and collaborative service management of multimedia services in softwarized networks, and QoE-oriented business models. The distinguished authors also explore: Thorough introductions to 5G networks, including definitions and requirements, as well as Quality of Experience management of multimedia streaming services Comprehensive explorations of multimedia streaming services over the internet and network softwarization and virtualization in future networks Practical discussions of QoE management using SDN and NFV in future networks, as well as QoE management of multimedia services in emerging architectures, including MEC, ICN, and Fog/Cloud Computing In-depth examinations of QoE in emerging applications, 5G network slicing architectures and implementations, and 5G network slicing orchestration and resource management Perfect for researchers and engineers in multimedia services and telecoms, Multimedia Streaming in SDN/NFV and 5G Networks will also earn a place in the libraries of graduate and senior undergraduate students with interests in computer science, communication engineering, and telecommunication systems.

Download or read book Software Defined Networking 2 written by Fetia Bannour and published by John Wiley & Sons. This book was released on 2023-01-12 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the concept of Software-Defined Networking (SDN) by studying the SDN architecture. It provides a detailed analysis of state-of-the-art distributed SDN controller platforms by assessing their advantages and drawbacks and classifying them in novel ways according to various criteria. Additionally, a thorough examination of the major challenges of existing distributed SDN controllers is provided along with insights into emerging and future trends in that area. Decentralization challenges in large-scale networks are tackled using three novel approaches, applied to the SDN control plane presented in the book. The first approach addresses the SDN controller placement optimization problem in large-scale IoT-like networks by proposing novel scalability and reliability aware controller placement strategies. The second and third approaches tackle the knowledge sharing problem between the distributed controllers by suggesting adaptive multilevel consistency models following the concept of continuous Quorum-based consistency. These approaches have been validated using different SDN applications, developed from real-world SDN controllers.

Download or read book Software Reliability Program Standard written by G-41 Reliability and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Standard provides a framework for the management of software reliability within system reliability requirements. It is based around the Software Reliability Plan and Software Reliability Case and emphasizes the importance of evaluating progress towards meeting software reliability requirements throughout the project life-cycle. JA1002 has been reaffirmed to comply with the SAE five-year review policy.

Download or read book Software Defined Networks written by Anand Nayyar and published by John Wiley & Sons. This book was released on 2022-06-21 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: SOFTWARE DEFINED NETWORKS Software defined networking suggests an alternative worldview, one that comes with a new software stack to which this book is organized, with the goal of presenting a top-to-bottom tour of SDN without leaving any significant gaps that the reader might suspect can only be filled with magic or proprietary code. Software defined networking (SDN) is an architecture designed to make a network more flexible and easier to manage. SDN has been widely adopted across data centers, WANs, and access networks and serves as a foundational element of a comprehensive intent-based networking (IBN) architecture. Although SDN has so far been limited to automated provisioning and configuration, IBN now adds “translation” and “assurance” so that the complete network cycle can be automated, continuously aligning the network to business needs. In 14 chapters, this book provides a comprehensive understanding of an SDN-based network as a scalable distributed system running on commodity hardware. The reader will have a one-stop reference looking into the applications, architectures, functionalities, virtualization, security, and privacy challenges connected to SDN. Audience Researchers in software, IT, and electronic engineering as well as industry engineers and technologists working in areas such as network virtualization, Python network programming, CISCO ACI, software defined network, and cloud computing.

Download or read book Resilient Power Electronic Systems written by Shahriyar Kaboli and published by John Wiley & Sons. This book was released on 2022-08-08 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resilient Power Electronic Systems Discover an advanced reference offering a powerful novel approach to the design and use of reliable and fault-tolerant power electronic systems In Resilient Power Electronic Systems, a team of accomplished researchers deliver an insightful treatment of the challenges faced by practitioners and researchers working with power electronic converters and attempting to analyze internal and external failure mechanisms. The authors expertly present advanced techniques for reducing noise effects on fault detection and prognosis. Comprised of thirteen chapters, the authors discuss the concepts of resilience and effective operative life in the context of power electronics. The differences between reliable and efficient systems are discussed, as well as the nature of these differences in complex systems. Finally, the book explores various methods to improve the resilience of power converters. Resilient Power Electronic Systems is packed with features, including illustrations, practice problems, and PowerPoint presentations. The book also includes: A thorough introduction to the application of power electronics in various industries, as well as the concept of resilience in a power converter Comprehensive explorations of resilience against fault tolerance, including fault-tolerant power converters and resilient power converters Practical discussions of the state-of-the-art in resilient power converters, including examinations of mission-critical applications In-depth examinations of internal and external fault in power converters with mission-critical applications Resilient Power Electronic Systems is an indispensable resource for researchers, professionals, and postgraduate students studying power electronics. It’s also an ideal reference for research and development engineers working with the design and development of power electronic converters.

Download or read book Security of Networks and Services in an All Connected World written by Daphne Tuncer and published by Springer. This book was released on 2017-06-29 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: ​This book is open access under a CC BY 4.0 license. This book constitutes the refereed proceedings of the 11th IFIP WG 6.6 International Conference on Autonomous Infrastructure, Management, and Security, AIMS 2017, held in Zurich, Switzerland, in July 2017. The 8 full papers presented together with 11 short papers were carefully reviewed and selected from 24 submissions. The papers are organized in the following topical sections: security management; management of cloud environments and services, evaluation and experimental study of rich network services; security, intrusion detection, and configuration; autonomic and self-management solutions; and methods for the protection of infrastructure.