Download or read book Throughput and Performance Analysis of IEEE 802 11E written by Xintong Li and published by . This book was released on 2003 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis for Increasing Throughput in QoS based IEEE 802 11e Wireless Networks written by and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of IEEE 802 11A Signals Under Different Operational Environments written by Roy Chan Hsiung Wei and published by . This book was released on 2004-09 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rapid employment of wireless networks commercially, the military is seeking viable solutions for providing high-speed wireless network throughout the battle space. The IEEE 802.11a wireless LAN presents an attractive solution providing up to 54 Mbps data-link bandwidth. Moreover, it operates in the less congested 5-GHz U-NII band and possesses more operating channels. This research implemented two prototype systems using low-cost commercially available hardware. The Cisco Aironet 1400 wireless bridge and the Proxim Tsunami MP.11a wireless system were chosen for their superior specifications and for their reputation of being market leaders in IEEE 802.11 wireless products. The performances of the prototype systems were evaluated in three operational environments (land, water and vegetation). The data collected were then compared to the theoretical performance.
Download or read book Improvements and Performance Analysis of IEEE 80211 Medium Access Protocols written by Ozgur Ekici and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In IEEE 802.11 standard development process, new physical and medium access layer techniques for higher throughput (IEEE 802.11n) and quality of service (IEEE 802.11e) enhancements are being designed on solid foundation of the distributed coordination function. None of these recently developed enhancements are immune to hidden node and hot-spot (congestion) problems. On the contrary, the increased operational bandwith of the higher throughput implementation makes them more prone to interference in limited number of IEEE 802.11 channels. Distributed coordination function is and will be the primary contention resolution algorithm of IEEE 802.11 systems. Identification and formulation of the common problems this channel access technique is facing in practical networks would give us a better understanding in terms of its limitations. In this work, we introduce a methodology to estimate the throughput performance of distributed coordination in unsaturated and hidden communication environments. Then by applying this methodology, we analytically estimate the abnormality in its fairness performance. The secondary channel access scheme of IEEE 802.11 is point coordination function, which does not suffer from hidden node and collision problems. We show that point coordination function in its current form has a poor throughput performance due to ignoring of the multi-rate transmission capability of users. We propose a new indexing algorithm for polling that increases the performance of point coordination function significantly. In this thesis, we extend the performance analysis of the distributed coordination function to enterprise networks configurations where networks are typically comprised of multiple access points. We propose an intelligent association algorithm that provides consistent higher throughput and better network-wide fairness independent of user load distribution within the network in comparison to the standard association algorithm.
Download or read book IEEE 802 11 MAC Protocol Performance Evaluation in Operational Environments written by Kacha Jitpanya and published by . This book was released on 2002-03-01 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IEEE 802.11 MAC protocol is widely used for wireless local area networks. Consequently, it is important to examine the protocol performance in operational environments. This thesis presents a simulation study of the performance of the IEEE 802.11 MAC protocol in multihop, jamming, and mobile node environments. The effects of the request-to-send mechanism and fragmentation in these environments are also studied. The average throughput and delay are obtained from the simulation and these results are then used to analyze the protocol performance.
Download or read book Parallel and Distributed Processing and Applications written by Minyi Guo and published by Springer Science & Business Media. This book was released on 2006-11-27 with total page 971 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 4th International Symposium on Parallel and Distributed Processing and Applications, ISPA 2006, held in Sorrento, Italy in November 2006. The 79 revised full papers presented together with five keynote speeches cover architectures, networks, languages, algorithms, middleware, cooperative computing, software, and applications.
Download or read book Controls Automation of Communication Systems ICCACS2004 written by and published by Allied Publishers. This book was released on 2004 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Providing Quality of Service in Heterogeneous Environments written by Ralf Lehnert, Phuoc Tran-Gia, Joachim Charzinsky and published by Elsevier. This book was released on 2003 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radio Communications written by Alessandro Bazzi and published by BoD – Books on Demand. This book was released on 2010-04-01 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decades the restless evolution of information and communication technologies (ICT) brought to a deep transformation of our habits. The growth of the Internet and the advances in hardware and software implementations modified our way to communicate and to share information. In this book, an overview of the major issues faced today by researchers in the field of radio communications is given through 35 high quality chapters written by specialists working in universities and research centers all over the world. Various aspects will be deeply discussed: channel modeling, beamforming, multiple antennas, cooperative networks, opportunistic scheduling, advanced admission control, handover management, systems performance assessment, routing issues in mobility conditions, localization, web security. Advanced techniques for the radio resource management will be discussed both in single and multiple radio technologies; either in infrastructure, mesh or ad hoc networks.
Download or read book Performance Analysis and Enhancement of IEEE 802 11e EDCA Protocols written by Rami Ali Mohammed Abudayyeh and published by . This book was released on 2011 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of MPEG 4 Video Transmission Over Wireless LAN written by Abdirisaq Mohammed Jama and published by . This book was released on 2010 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transmitting MPEG-4 video over Wireless Local Area Networks is expected to be an important component of many emerging multimedia applications. One of the critical issues for multimedia applications is to ensure that the Quality of Service (QoS) requirement to be maintained at an acceptable level. The IEEE802.11 working group developed a new standard called IEEE802.11e to support Quality of service (QoS) in WLAN. This standard aims to support QoS by providing differentiated classes of service at the Medium Access Control (MAC) layer to enhance the ability of physical layers to deliver time-critical traffic in the presence of traditional data packets. The IEEE802.11e standard defines four access categories (ACs). These four ACs have different transmission priorities. The transmission priority is the probability of successfully earning the chance to transmit when individual ACs are competing to access the wireless channel; the higher the transmission priority, the better is the opportunity to transmit. In this thesis Network Simulator 2 (NS-2) and Evalvid are used as simulation tool to analyze the Performance of MPEG-4 Video Transmissions over Wireless LAN. Enhancement approach of IEEE802.11e EDCA parameters of NS-2 and Evalvid were done to present the enhanced approach. This has allowed us to simulate different simulation scenarios such as average end-to-end delay, throughput and packet loss ratio to suite different environments under various conditions in performance analysis for MPEG-4 video transmission over WLANs. The level of performance such as Packet loss, PSNR, Decodable Frame Rate (Q) were evaluated which shows better results for lower packet loss, higher Throughput, PSNR & Decodable Frame Rate (Q) for MPEG-4 video transmission over IEEE802.11e. The experimentation results have shown that MPEG-4 video streaming services performs well only when the SNR is above 30dB. However, the received video quality becomes unacceptable in 20 dB to 30 dB. Any traffic transmission will be easily denied when the SNR is below 20dB.
Download or read book Advanced Wireless LAN written by Song Guo and published by BoD – Books on Demand. This book was released on 2012-06-05 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past two decades have witnessed starling advances in wireless LAN technologies that were stimulated by its increasing popularity in the home due to ease of installation, and in commercial complexes offering wireless access to their customers. This book presents some of the latest development status of wireless LAN, covering the topics on physical layer, MAC layer, QoS and systems. It provides an opportunity for both practitioners and researchers to explore the problems that arise in the rapidly developed technologies in wireless LAN.
Download or read book Performance Analysis of Radio Over Fiber Based on IEEE 802 11a written by Siti Idani Azuriati Abdul Aziz and published by . This book was released on 2011 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Web Artificial Intelligence and Network Applications written by Leonard Barolli and published by Springer. This book was released on 2019-03-14 with total page 1172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the book is to provide latest research findings, innovative research results, methods and development techniques from both theoretical and practical perspectives related to the emerging areas of Web Computing, Intelligent Systems and Internet Computing. As the Web has become a major source of information, techniques and methodologies that extract quality information are of paramount importance for many Web and Internet applications. Data mining and knowledge discovery play key roles in many of today’s prominent Web applications such as e-commerce and computer security. Moreover, the outcome of Web services delivers a new platform for enabling service-oriented systems. The emergence of large scale distributed computing paradigms, such as Cloud Computing and Mobile Computing Systems, has opened many opportunities for collaboration services, which are at the core of any Information System. Artificial Intelligence (AI) is an area of computer science that build intelligent systems and algorithms that work and react like humans. The AI techniques and computational intelligence are powerful tools for learning, adaptation, reasoning and planning. They have the potential to become enabling technologies for the future intelligent networks. Recent research in the field of intelligent systems, robotics, neuroscience, artificial intelligence and cognitive sciences are very important for the future development and innovation of Web and Internet applications.
Download or read book Advances on Broad Band Wireless Computing Communication and Applications written by Leonard Barolli and published by Springer. This book was released on 2016-10-21 with total page 917 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of all-IP networking and wireless technology has changed the ways of living the people around the world. The progress of electronic integration and wireless communications is going to pave the way to offer people the access to the wireless networks on the fly, based on which all electronic devices will be able to exchange the information with each other in ubiquitous way whenever necessary. The aim of the volume is to provide latest research findings, innovative research results, methods and development techniques from both theoretical and practical perspectives related to the emerging areas of broadband and wireless computing. This proceedings volume presents the results of the 11th International Conference on Broad-Band Wireless Computing, Communication And Applications (BWCCA-2016), held November 5-7, 2016, at Soonchunhyang University, Asan, Korea.
Download or read book Adaptation in Wireless Communications 2 Volume Set written by Mohamed Ibnkahla and published by CRC Press. This book was released on 2018-10-08 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread use of adaptation techniques has helped to meet the increased demand for new applications. From adaptive signal processing to cross layer design, Adaptation in Wireless Communications covers all aspects of adaptation in wireless communications in a two-volume set. Each volume provides a unified framework for understanding adaptation and relates various specializations through common terminologies. In addition to simplified state-of-the-art cross layer design approaches, they also describe advanced techniques, such as adaptive resource management, 4G communications, and energy and mobility aware MAC protocols.
Download or read book FiWi Access Networks written by Martin Maier and published by Cambridge University Press. This book was released on 2011-12-15 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of broadband access networks toward bimodal fiber-wireless (FiWi) access networks, described in this book, may be viewed as the endgame of broadband access. After discussing the economic impact of broadband access and current worldwide deployment statistics, all the major legacy wireline and wireless broadband access technologies are reviewed. State-of-the-art GPON and EPON fiber access networks are described, including their migration to next-generation systems such as OCDMA and OFDMA PONs. The latest developments of wireless access networks are covered, including VHT WLAN, Gigabit WiMAX, LTE and WMN. The advantages of FiWi access networks are demonstrated by applying powerful network coding, heterogeneous optical and wireless protection, hierarchical frame aggregation, hybrid routing and QoS continuity techniques across the optical-wireless interface. The book is an essential reference for anyone working on optical fiber access networks, wireless access networks or converged FiWi systems.
