Download or read book Performance modelling and evaluation of heterogeneous wired wireless networks under bursty traffic written by W. U. Yulei and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Modelling and Analysis of Heterogeneous Networks written by Demetres D. Kouvatsos and published by CRC Press. This book was released on 2022-09-01 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the recent years, a considerable amount of effort has been devoted, both in industry and academia, towards the performance modelling, evaluation and prediction of convergent multi-service heterogeneous networks, such as wireless and optical networks, towards the design and dimensioning of the next and future generation Internets.This book follows Heterogeneous Networks: Traffic Engineering, Performance Evaluation Studies and Tools and presents recent advances in networks of diverse technology reflecting the state-of-the-art technology and research achievements in performance modelling, analysis and applications worldwide.Technical topics discussed in the book include:• Multiservice Switching Networks;• Multiservice Switching Networks;• Wireless Ad Hoc Networks;• Wireless Sensor Networks;• Wireless Cellular Networks;• Optical Networks;Heterogeneous Networks:- Performance Modelling and Analysis contains recently extended research papers, which have their roots in the series of the HET-NETs International Working Conferences focusing on the 'Performance Modelling and Evaluation of Heterogeneous Networks' under the auspices of the EU Networks of Excellence Euro-NGI and Euro-FGI.Heterogeneous Networks: Performance Modelling and Analysis is ideal for personnel in computer/communication industries as well as academic staff and master/research students in computer science, operational research, electrical engineering and telecommunication systems and the Internet.KeywordsHeterogeneous networks, performance modelling and analysis, wired networks, wireless networks: ad hoc, sensor and cellular, optical networks, next and future generation Internets.
Download or read book Performance Modelling and Evaluation of Heterogeneous Wired written by W. U. Yulei and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer networks can be classified into two broad categories: wired networks and wireless networks, according to the hardware and software technologies used to interconnect the individual devices. Wired interconnection networks are hardware fabrics supporting communications between individual processors in highperformance computing systems (e.g., multi-computer systems and cluster systems). On the other hand, due to the rapid development of wireless technologies, wireless networks have emerged and become an indispensable part for people's lives. The integration of different wireless technologies is an effective approach to accommodate the increasing demand of the users to communicate with each other and access the Internet. This thesis aims to investigate the performance of wired interconnection networks and integrated wireless networks under the realistic working conditions. Traffic patterns have a significant impact on network performance. A number of recent measurement studies have convincingly demonstrated that the traffic generated by many real-world applications in communication networks exhibits bursty arrival nature and the message destinations are non-uniformly distributed. Analytical models for the performance evaluation of wired interconnection networks and integrated wireless networks have been widely reported. However, most of these models are developed under the simplified assumption of non-bursty Poisson process with uniformly distributed message destinations. To fill this gap, this thesis first presents an analytical model to investigate the performance of wired interconnection networks in multi-computer systems. Secondly, the analytical models for wired interconnection networks in multi-cluster systems are developed. Finally, this thesis proposes analytical models to evaluate the end-to-end delay and throughput of integrated wireless local area networks and wireless mesh networks. These models are derived when the networks are subject to bursty traffic with non-uniformly distributed message destinations which can capture the burstiness of real-world network traffic in the both temporal domain and spatial domain. Extensive simulation experiments are conducted to validate the accuracy of the analytical models. The models are then used as practical and cost-effective tools to investigate the performance of heterogeneous wired or wireless networks under the traffic patterns exhibited by real-world applications.
Download or read book Performance Modelling and Analysis of Heterogeneous Networks written by Demetres D. Kouvatsos and published by River Publishers. This book was released on 2009-02-15 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains extended research papers, which have their roots in the series of the HET-NETs International Working Conferences focusing on the 'Performance Modelling and Evaluation of Heterogeneous Networks' under the auspices of the EU Networks of Excellence Euro-NGI and Euro-FGI.
Download or read book Next Generation Teletraffic and Wired Wireless Advanced Networking written by Jarmo Harju and published by Springer Science & Business Media. This book was released on 2006-05-15 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 6th International Conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking, NEW2AN 2006, held in St. Petersburg, Russia in May/June 2006. The 49 revised full papers presented together with 2 keynote talks were carefully reviewed and selected from a total of 137 submissions. The papers are organized in topical sections on teletraffic, traffic characterization and modeling, 3G/UMTS, sensor networks, WLAN, QoS, MANETs, lower layer techniques, PAN technologies, and TCP.
Download or read book Next Generation Teletraffic and Wired Wireless Advanced Networking written by Yevgeni Koucheryavy and published by Springer. This book was released on 2006-09-21 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 6th International Conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking, NEW2AN 2006, held in St. Petersburg, Russia in May/June 2006. The book includes 49 revised full papers presented together with 2 keynote talks. The papers are organized in topical sections on teletraffic, traffic characterization and modeling, 3G/UMTS, sensor networks, WLAN, QoS, MANETs, lower layer techniques, PAN technologies, and TCP.
Download or read book Performance Modeling and Analysis of Wireless Local Area Networks with Bursty Traffic written by Noushin Najjari and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer System Performance Modeling in Perspective written by Erol Gelenbe and published by World Scientific. This book was released on 2006 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer system performance evaluation is a key discipline for the understanding of the behavior and limitations of large scale computer systems and networks. This volume provides an overview of the milestones and major developments of the field.The contributions to the book include many of the principal leaders from industry and academia with a truly international coverage, including several IEEE and ACM Fellows, two Fellows of the US National Academy of Engineering and a Fellow of the European Academy, and a former President of the Association of Computing Machinery.
Download or read book Computer System Performance Modeling In Perspective A Tribute To The Work Of Prof Kenneth C Sevcik written by Erol Gelenbe and published by World Scientific. This book was released on 2006-09-20 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer system performance evaluation is a key discipline for the understanding of the behavior and limitations of large scale computer systems and networks. This volume provides an overview of the milestones and major developments of the field.The contributions to the book include many of the principal leaders from industry and academia with a truly international coverage, including several IEEE and ACM Fellows, two Fellows of the US National Academy of Engineering and a Fellow of the European Academy, and a former President of the Association of Computing Machinery./a
Download or read book Performance Evaluation of written by Nikolay Bogdanov and published by LAP Lambert Academic Publishing. This book was released on 2015-02-10 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of the book is to develop models for designing WLAN, used in transport networks with mobile objects. At that quality indicators of functioning of networks should be maximally close to the actual data. Due to the fact that the interaction of local wireless network takes place within the coverage area, its Access Point occurs with a limited number of clients - closed cyclic models are used for transport vehicles to simulate such systems. In this book, the number of mobile objects determined depending on the distance from the base station and identification of system parameters of data transmission, based on this the problem of determining of the actual speed of data transmission from the moving objects is solved, located within the coverage area of the base station of wireless network.
Download or read book Analysis and Improvement of Medium Access Control Protocols in Wireless Networks written by Jia Hu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to efficiently utilize the scarce wireless resource as well as keep up with the ever-increasing demand for Quality-of-Service (QoS) of multimedia applications, wireless networks are undergoing rapid development and dramatic changes in the underlying technologies and protocols. The Medium Access Control (MAC) protocol, which coordinates the channel access and data transmission of wireless stations, plays a pivotal role in wireless networks. Performance modelling and analysis has been and continues to be of great theoretical and practical importance in the design and development of wireless networks. This research is devoted to developing efficient and cost-effective analytical tools for the performance analysis and enhancement of MAC protocols in Wireless Local Area Networks (WLANs) under heterogeneous multimedia traffic. To support the MAC-layer QoS in WLANs, the IEEE 802.11e Enhanced Distributed Channel Access (EDCA) protocol has proposed three QoS differentiation schemes in terms of Arbitrary Inter-Frame Space (AIFS), Contention Window (CW), and Transmission Opportunity (TXOP). This research starts with the development of new analytical models for the TXOP scheme specified in the EDCA protocol under Poisson traffic. A dynamic TXOP scheme is then proposed to adjust the TXOP limits according to the status of the transmission queue. Theoretical analysis and simulation experiments show that the proposed dynamic scheme largely improves the performance of TXOP. To evaluate the TXOP scheme in the presence of ii heterogeneous traffic, a versatile analytical model is developed to capture the traffic heterogeneity and model the features of burst transmission. The performance results highlight the importance of taking into account the heterogeneous traffic for the accurate evaluation of the TXOP scheme in wireless multimedia networks. To obtain a thorough and deep understanding of the performance attributes of the EDCA protocol, a comprehensive analytical model is then proposed to accommodate the integration of the three QoS schemes of EDCA in terms of AIFS, CW, and TXOP under Poisson traffic. The performance results show that the TXOP scheme can not only support service differentiation but also improve the network performance, whereas the AIFS and CW schemes provide QoS differentiation only. Moreover, the results demonstrate that the MAC buffer size has considerable impact on the QoS performance of EDCA under Poisson traffic. To investigate the performance of EDCA in wireless multimedia networks, an analytical model is further developed for EDCA under heterogeneous traffic. The performance results demonstrate the significant effects of heterogeneous traffic on the total delay and frame losses of EDCA with different buffer sizes. Finally, an efficient admission control scheme is presented for the IEEE 802.11e WLANs based on analytical modelling and a game-theoretical approach. The admission control scheme can maintain the system operation at an optimal point where the utility of the Access Point (AP) is maximized with the QoS constraints of various users.
Download or read book Performance Modeling Design and Analysis of Transport Mechanisms in Integrated Heterogeneous Wireless Networks written by Humphrey Rutagemwa and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Design of Next generation Heterogeneous Wireless Networks written by Ahmed H. Zahran and published by . This book was released on 2007 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The service integration of different wireless access technologies is envisioned as a viable approach to accommodate the expected increase in the demand on wireless resources. This vision originates a new networking paradigm that introduces a new vertical mobility dimension, which significantly magnifies the mobility impact on the system performance and creates new challenging design issues that necessitate adopting novel innovative approaches to handle the inherent system heterogeneity.Clearly, vertical mobility is completely dismissed in the current mobility models that are primarily developed for homogeneous cellular systems. Hence, the development of new mobility models that consider vertical mobility in heterogeneous systems evolves as a crucial requirement for proper system design and performance evaluation. These models should satisfy general mobility modeling requirements such as flexibility and analytical tractability. More importantly, they should accommodate the correlation between the mobile terminal (MT) cell residence time (CRT) and the durations spent by the MT under the umbrellas of different technological coverage cocktails. In this dissertation, we developed a novel CRT mobility modeling framework that realizes the aforementioned modeling requirements. This framework is used to develop mobility models for two-tier and n-tier heterogeneous systems. Based on these models, we developed generic performance evaluation frameworks to estimate several salient performance metrics. Additionally, we employed the developed mobility modeling and performance evaluation frameworks to study several interesting network planning and dimensioning problems.In a complementary research direction, we studied vertical mobility management in heterogeneous systems. The asymmetric nature of vertical mobility is a novel design challenge that invalidates the traditional handoff decision mechanisms, which are based on comparing the signal strength from different base Stations of the same network. Hence, the vertical handoff decision should adopt novel mechanisms that consider a predetermined set of user preferences and network design goals. Consequently, we developed a novel flexible vertical handoff approach that, can adapt to different operating parameters such as, user mobility, required handoff delay, and different application requirements.
Download or read book Heterogeneous Networking Testbeds Integration and Wireless Network Virtualization written by and published by . This book was released on 2008 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Networking research has grown immensely over the past few years. This has urged the need for a heterogeneous networking research infrastructure, to experiment with the interaction and integration of different types of networks. This requirement led to the Global Environment for Network Innovations (GENI) effort, supported by NSF, which aims at creating a global infrastructure for conducting networking experiments across diverse substrates such as wired, wireless, sensor and cellular networks. In this work, we discuss challenges involved in federating two diverse testbeds - PlanetLab and ORBIT and present a model for building a united infrastructure for the models. PlanetLab is a global research wired network that supports the development of new network services. ORBIT is a laboratory-based wireless network emulator for 802.11 testing. An integrated wired-wireless testbed will increase the scalability of experimentation. Proof-of-concept experiments are also presented reinforcing the usefulness of the model in terms of facilitating experiments over the integrated infrastructure. Such an integrated infrastructure poses a requirement of support for wireless network virtualization - supporting multiple concurrent wireless experiments. Unlike wired networks, wireless networks present unique challenges making the task of wireless virtualization a difficult problem. The critical problem of simultaneous experimentation in networks involving the wireless medium are identified and approaches towards it are discussed. We evaluate and compare two approaches towards wireless virtualization - SDMA (Space Division Channel Multiplexing) and VAP (Virtual AP Channel Multiplexing) suitable for supporting long running experiments. In this study conducted on ORBIT we quantify the difference in performance and interference when using wireless virtualization and suggest measures to mitigate the same. The feasibilty study will serve as the first step towards ORBIT virtualization.
Download or read book On the Design of Next generation Wireless Networks written by Wei Wang and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless technology has gained great attention from both academia and industry in the past decades. It is believed to be the essential part to achieve the ultimate goal of communications: communication happens whenever, wherever, and to whomever. With the proliferation of different wireless technologies and their vast deployment, we will soon enter the age of ubiquitous computing. Compared to its wireline counterpart, wireless network faces more technical challenges. The wireless channel is less reliable and more variable than fibers and cables. Wireless devices are usually mobile and energy-constraint. Wireless transceiver has limited coverage area. All these characteristics make the resource allocation and algorithm design in wireless networks challenging tasks. This dissertation investigates both issues in different types of next-generation wireless networks. This dissertation first explores the problem of providing a traffic-oblivious routing and scheduling for wireless mesh networks. We present an optimization model which generates a static routing and scheduling policy with worst-case performance guarantees under a range of traffic conditions. Packet-level simulations demonstrate good average performance for the generated routing and scheduling in addition to its worse-case guarantees. Next, we investigate the problem of identifying the maximum capacity of multi-channel multi-radio wireless networks, given the number of available channels. We provide an Integer Linear Program (ILP) framework to compute the maximum capacity. We also discuss how to extend the framework to consider heterogeneous network. Then the framework will output the minimum number of radios necessary for each node to fully utilize the available channels, which can be used to identify the bottleneck in the topology, and also indicates the "goodness" of the topology. We also study the integration gain of heterogenous WiFi and WiMAX networks. We propose a generic framework to identify the integration gain, the gain comes from better utilization of resources rather than the addition of resources. For the performance objective, we focus on the max-min throughput fairness, and also briefly cover the proportional fairness. We propose approximation algorithms to achieve different objectives and compute the integration gain based on the framework. The proposed framework can be used to evaluate the potential benefit of combining different heterogeneous wireless networks. The approximation algorithms can be directly used to perform intelligent user association in the integrated network. Last, we study the unique characteristics of cognitive radio networks. Based on our observations, we propose distributed algorithms to perform channel allocation among secondary users. We consider both throughput and fairness, and study their tradeoff. This dissertation makes important contributions by introducing novel models, algorithms and architectures that will help improve the network analysis, planning, and deployment of next-generation wireless networks.
Download or read book Quality of Service Architectures for Wireless Networks Performance Metrics and Management written by Adibi, Sasan and published by IGI Global. This book was released on 2010-01-31 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book further explores various issues and proposed solutions for the provision of Quality of Service (QoS) on the wireless networks"--Provided by publisher.
Download or read book The Business of Broadband written by International Engineering Consortium and published by Intl. Engineering Consortiu. This book was released on 2003 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report addresses issues related to delivering products and services over broadband, including the technical and business challenges of providing multimedia entertainment, video and other services on demand, interactive television, the wireless Web, videoconferencing, telemedicine, and more. The report also considers the current and potential markets for such applications, the business models providers that can adopt, and pricing and fee structures, while focusing on those applications and on the business models that will make them available and profitable.
