A New Hybrid Channel Access Scheme For Ad Hoc Networks

Download A New Hybrid Channel Access Scheme For Ad Hoc Networks full books in PDF, epub, and Kindle. Read online A New Hybrid Channel Access Scheme For Ad Hoc Networks ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

A New Hybrid Channel Access Scheme for Ad Hoc Networks

Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (227 download)

DOWNLOAD NOW!

Book Synopsis A New Hybrid Channel Access Scheme for Ad Hoc Networks by :

Download or read book A New Hybrid Channel Access Scheme for Ad Hoc Networks written by and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many contention-based channel access schemes have been proposed for multi-hop ad hoc networks in the recent past, and they can be divided into two categories, sender-initiated and receiver-initiated, according to the collision avoidance handshake in use. The sender-initiated scheme is adopted in the IEEE 802.11 Medium Access Control (MAC) protocol, which is by far the most popular and studied protocol. However, the IEEE 802.11 MAC protocol can experience serious fairness problems due to location-dependent contention and the binary exponential backoff it uses. On the other hand, a receiver-initiated collision avoidance handshake is more effective at the receiver's side. Hence, the authors propose a hybrid channel access scheme that combines both sender-initiated and receiver-initiated collision avoidance schemes. The new scheme involves only some additional queue management and book-keeping work while maintaining compatibility with the existing IEEE 802.11 protocol. Simulation experiments show that the new scheme is very effective, as it can achieve much better fairness than the original sender-initiated scheme with almost no degradation in throughput. The hybrid scheme also eliminates the need for a good traffic estimator, which is usually mandatory in pure receiver-initiated schemes.

Throughput and Fairness in A Hybrid Channel Access Scheme for Ad Hoc Networks

Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (227 download)

DOWNLOAD NOW!

Book Synopsis Throughput and Fairness in A Hybrid Channel Access Scheme for Ad Hoc Networks by :

Download or read book Throughput and Fairness in A Hybrid Channel Access Scheme for Ad Hoc Networks written by and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel hybrid channel access scheme that combines sender-initiated and receiver-initiated collision-avoidance handshakes is proposed for multi-hop ad hoc networks. The scheme is based on the observation that a receiver-initiated scheme is more appropriate when receivers are more knowledgeable of the contention around themselves and can compete for the channel more effectively. By adaptively sharing the burden of initiating the collision-avoidance handshake between the nodes that experience different levels of contention, better fairness may be achieved with almost no degradation in throughput. An attractive feature of the new scheme is that it is a simple extension to the existing IEEE 802.11 MAC protocol, and it maintains compatibility with the standard. The new scheme involves adding very simple queue management and book-keeping work mechanisms. Simulation experiments of the IEEE 802.11 MAC protocol and the new scheme show that, although the proposed hybrid scheme does not solve the fairness problem conclusively, it does alleviate the fairness problem in some cases without sacrificing much throughput and simplicity. The difficulty of improving fairness for TCP-based flows is demonstrated. A promising topic for future work consists of combining the new hybrid scheme with some proposed mechanisms that try to approximate fair queueing for ad hoc networks to achieve some QoS assurances. Without explicit information exchange among nodes, the fairness problem cannot be solved conclusively.

Hybrid Channel Access Scheduling in Ad Hoc Networks

Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (227 download)

DOWNLOAD NOW!

Book Synopsis Hybrid Channel Access Scheduling in Ad Hoc Networks by :

Download or read book Hybrid Channel Access Scheduling in Ad Hoc Networks written by and published by . This book was released on 2002 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the hybrid activation multiple access (HAMA) protocol for ad hoc networks. Unlike previous channel access scheduling protocols that activate either nodes or links only, HAMA is a node-activation channel access protocol that also maximizes the chance of link activations using time- and code-division schemes. HAMA only requires identifiers of the neighbors within two hops from each node to schedule channel access. Using this neighborhood information, each node determines whether to transmit in the current time slot on a dynamically assigned spreading code. A neighbor protocol supplements HAMA with up-to-date two-hop neighborhood information by reliably propagating the one-hop neighbor updates through a novel random access technique. The throughput and delay characteristics of HAMA in randomly-generated multihop wireless networks are studied by analyses and simulations. The results of the analyses show that HAMA achieves higher channel utilization in ad hoc networks than a distributed scheduling scheme based on node activation, similar throughout as a well-known scheduling algorithm based on complete topology information, and much higher throughout than the ideal CSMA and CSMA/CA protocols.

AD HOC NETWORKS

Author : Prasant Mohapatra
Publisher : Springer Science & Business Media
ISBN 13 : 0387226907
Total Pages : 287 pages
Book Rating : 4.3/5 (872 download)

DOWNLOAD NOW!

Book Synopsis AD HOC NETWORKS by : Prasant Mohapatra

Download or read book AD HOC NETWORKS written by Prasant Mohapatra and published by Springer Science & Business Media. This book was released on 2006-01-16 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: AD HOC NETWORKS: Technologies and Protocols is a concise in-depth treatment of various constituent components of ad hoc network protocols. It reviews issues related to medium access control, scalable routing, group communications, use of directional/smart antennas, network security, and power management among other topics. The authors examine various technologies that may aid ad hoc networking including the presence of an ability to tune transmission power levels or the deployment of sophisticated smart antennae. Contributors to this volume include experts that have been active in ad hoc network research and have published in the premier conferences and journals in this subject area. AD HOC NETWORKS: Protocols and Technologies will be immensely useful as a reference work to engineers and researchers as well as to advanced level students in the areas of wireless networks, and computer networks.

Medium Access Control in Wireless Networks

Author : Hongyi Wu
Publisher : Nova Publishers
ISBN 13 : 9781600219443
Total Pages : 662 pages
Book Rating : 4.2/5 (194 download)

DOWNLOAD NOW!

Book Synopsis Medium Access Control in Wireless Networks by : Hongyi Wu

Download or read book Medium Access Control in Wireless Networks written by Hongyi Wu and published by Nova Publishers. This book was released on 2008 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless technologies and applications are becoming one of the fastest growing and most promising areas in recent years. To accommodate data transmission by multiple stations sharing the scarce wireless bandwidth, a medium access control (MAC) protocol plays a crucial role in scheduling packet transmission fairly and efficiently. The emerging wireless networks, such as ad-hoc networks, sensor networks or mesh networks, are mostly multi-hop based and in distributed manner, which brings a lot of problems and challenges in designing fine-tuned MAC protocols tailored for modern wireless network. In this book, the authors give complete and in-depth overviews to the classic medium access control algorithms and the related protocols, as well as their applications in various wireless data networks especially the most successful Wireless Local Area Networks (WLAN). The book consists of three major parts. Part I of this book, including Chapters 1-7, is emphasising on the fundamentals of medium access control algorithms and protocols. Chapter 1 provides an introduction to the wireless networks, such as overview of wireless networks, problems and challenges of the wireless networks, and the classifications of MAC protocols as well as the performance metrics. Chapter 2 introduces important collision resolution algorithms applied in medium access controls, for example, the splitting algorithm and the backoff algorithm. Chapter 3 reviews the hybrid access control algorithms that combine both contention and allocation schemes. A series of important collision avoidance schemes are introduced in Chapters 4-7 respectively, with a specific design goal covered in each chapter. Chapter 4 focuses on the multi-channel MAC protocols for collision avoidance; Chapter 5 introduces the concepts of power control and power management in medium access control and how they can be applied in MAC protocol design; Chapter 6 presents how to provide Quality-of- Service (QoS) to multimedia wireless networks, in either centralised or distributed manner; and Chapter 7 explains how the smart antennas can be applied in the medium access control to provide high channel throughput and low packet collision.

Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas

Author : Yu Wang
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (68 download)

DOWNLOAD NOW!

Book Synopsis Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas by : Yu Wang

Download or read book Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas written by Yu Wang and published by . This book was released on 2004 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ad hoc network is a dynamic network formed on demand by a group of nodes without the aid of any pre-existing network infrastructure. An efficient and effective medium access control (MAC) protocol which regulates nodes access to the shared channel(s) is essential in an ad hoc network. Our work is focused on the throughput and fairness properties of existing omni-directional MAC protocols as well as enhancement of their performance with directional antennas via both analytical and simulation approaches. In the first part, we present the first analytical modeling of collision avoidance MAC protocols including the popular IEEE 802.11 MAC protocol in multi-hop ad hoc networks. We show that in ad hoc networks with a lot of hidden terminals, collision avoidance even if done correctly, can still limit achievable throughput significantly because of the much reduced spatial reuse. Then we advance the analytical modeling to evaluate those MAC protocols which use directional antennas and can achieve much higher throughput through directing transmissions and receptions to desired directions only. We show that the gain in spatial reuse outweighs that of collision avoidance and hence an aggressive all-directional scheme is more advantageous than other hybrid schemes that take conservative (or unnecessary) tradeoff between collision avoidance and spatial reuse. All the analytical work has provided very useful insight on the interaction between spatial reuse, interference reduction and collision avoidance that previous work lacked.

Handbook on Theoretical and Algorithmic Aspects of Sensor, Ad Hoc Wireless, and Peer-to-Peer Networks

Author : Jie Wu
Publisher : CRC Press
ISBN 13 : 0203323688
Total Pages : 896 pages
Book Rating : 4.2/5 (33 download)

DOWNLOAD NOW!

Book Synopsis Handbook on Theoretical and Algorithmic Aspects of Sensor, Ad Hoc Wireless, and Peer-to-Peer Networks by : Jie Wu

Download or read book Handbook on Theoretical and Algorithmic Aspects of Sensor, Ad Hoc Wireless, and Peer-to-Peer Networks written by Jie Wu and published by CRC Press. This book was released on 2005-08-08 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: The availability of cheaper, faster, and more reliable electronic components has stimulated important advances in computing and communication technologies. Theoretical and algorithmic approaches that address key issues in sensor networks, ad hoc wireless networks, and peer-to-peer networks play a central role in the development of emerging network

Applied Informatics and Communication, Part II

Author : Dehuai Zeng
Publisher : Springer Science & Business Media
ISBN 13 : 3642232191
Total Pages : 758 pages
Book Rating : 4.6/5 (422 download)

DOWNLOAD NOW!

Book Synopsis Applied Informatics and Communication, Part II by : Dehuai Zeng

Download or read book Applied Informatics and Communication, Part II written by Dehuai Zeng and published by Springer Science & Business Media. This book was released on 2011-08-02 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: The five volume set CCIS 224-228 constitutes the refereed proceedings of the International conference on Applied Informatics and Communication, ICAIC 2011, held in Xi'an, China in August 2011. The 446 revised papers presented were carefully reviewed and selected from numerous submissions. The papers cover a broad range of topics in computer science and interdisciplinary applications including control, hardware and software systems, neural computing, wireless networks, information systems, and image processing.

Universal Multiservice Networks

Author : Mário Marques Freire
Publisher : Springer
ISBN 13 : 3540301976
Total Pages : 567 pages
Book Rating : 4.5/5 (43 download)

DOWNLOAD NOW!

Book Synopsis Universal Multiservice Networks by : Mário Marques Freire

Download or read book Universal Multiservice Networks written by Mário Marques Freire and published by Springer. This book was released on 2011-04-06 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: On behalf of the Organizing and Program Committees of the 3rd European Conference on Universal Multiservice Networks (ECUMN 2004), it is our great pleasure to introduce the proceedings of ECUMN 2004, which was held during October 25–27, 2004, in Porto, Portugal. In response to the Call for Papers, a total of 131 papers were submitted from 29 countries. Each paper was reviewed by several members of the Technical Program Committee or by external peer reviewers. After careful assessment of thereviews,53paperswereacceptedforpresentationin13technicalsessions;half of them originated from countries outside Europe (mainly Asia). This illustrates the strong interest of this conference beyond its original geographical area. The conference program covered a variety of leading-edge research topics which are of current interest, such as wireless networks, mobile ad hoc networks, sensor networks, mobility management, optical networks, quality of service and tra?c, transport protocols, real-time and multimedia, Internet technologies and applications, overlay and virtual private networks, security and privacy, and network operations and management. Together with three plenary sessions from France T ́ el ́ ecom, Siemens, and Cisco Systems, these technical presentations - dressed the latest research results from the international industry and academia and reported on ?ndings on present and future multiservice networks.

Advanced Wireless Networks

Author : Savo Glisic
Publisher : John Wiley & Sons
ISBN 13 : 9780470745731
Total Pages : 892 pages
Book Rating : 4.7/5 (457 download)

DOWNLOAD NOW!

Book Synopsis Advanced Wireless Networks by : Savo Glisic

Download or read book Advanced Wireless Networks written by Savo Glisic and published by John Wiley & Sons. This book was released on 2009-04-27 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: With 40% new material the new edition of Advanced Wireless Networks provides a comprehensive representation of the key issues in 4G wireless networks. Focussing on cognitive, cooperative and opportunistic paradigms to provide further increase in network efficiency, the book explores and addresses issues in wireless internet, mobile cellular and WLAN, as well as sensor, ad hoc, bio-inspired, active and cognitive networks. It examines the problem of cross-layer optimisation and network information theory as well as adaptability and reconfigurability in wireless networks. This book is an integral description of future wireless networks and the interconnection between their elements. The information is presented in a logical order within each chapter making it ideal for all levels of reader including researchers involved in modelling and analysis of future networks as well as engineers working in the area. Each chapter starts with introductory material and gradually includes more sophisticated models and mathematical tools concluding with a comprehensive list of references. Fully updated throughout with five new chapters on Opportunistic Communications; Relaying and Mesh Networks; Topology Control; Network Optimization; and Cognitive Radio Resource Management Unifies the latest research on cognitive, cooperative and opportunistic paradigms in wireless communications Provides efficient analytical tools for network analysis Discusses security issues, an essential element of working with wireless networks Supports advanced university and training courses in the field Companion website containing extra appendix on Queuing theory

Tibetan Medicinal Plants

Author : Christa Kletter
Publisher : CRC Press
ISBN 13 : 9780849300318
Total Pages : 1402 pages
Book Rating : 4.3/5 (3 download)

DOWNLOAD NOW!

Book Synopsis Tibetan Medicinal Plants by : Christa Kletter

Download or read book Tibetan Medicinal Plants written by Christa Kletter and published by CRC Press. This book was released on 2001 with total page 1402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasingly, modern medicine relies on so called traditional or ancient medical knowledge. Holistic practices such as adhering to proper diet, observing rules for appropriate behavior, and administering medical preparations are coupled with the latest technology and methods to treat the whole patient. In light of this trend, there is much to be gained from understanding of one of the oldest medical systems still in existence. Tibetan Medicinal Plants provides you a detailed analysis of how Tibetan plants are used in this centuries old system. The book opens with a summary of Tibetan medicine and covers the various habitats in which the plants are found. The main part of this volume encompasses 60 monographs listed by the Tibetan plant name. Each monograph consists of several chapters addressing different topics related either to the Tibetan or the Western approach. Most of the monographs contain a description of the macroscopic and microscopic characteristics of the used plant parts, and anatomical features of 76 plants are provided. Each monograph presents an overview of the known chemical constituents and pharmacological properties of each plant and describes their use in Tibetan medicine. In contrast to other publications on Tibetan medicine, where translations of the Tibetan terms are given in other languages, this book treats the Tibetan word as a technical term, keeps the Tibetan term and explains its meaning, lessening confusion by reducing the number of translations. Traditional Tibetan medicine has been in existence for centuries. Curative practices existed in the prebuddistic era, and the art of healing developed more than 2500 years ago. Tibetan Medicinal Plants provides a comprehensive overview of all plant types, thus making it easier to grasp the Tibetan concept. It gives you a comprehensive look at this centuries old science.

NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet

Author : Amitabha Das
Publisher : Springer
ISBN 13 : 3540795499
Total Pages : 965 pages
Book Rating : 4.5/5 (47 download)

DOWNLOAD NOW!

Book Synopsis NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet by : Amitabha Das

Download or read book NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet written by Amitabha Das and published by Springer. This book was released on 2008-05-06 with total page 965 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 7th International IFIP-TC6 Networking Conference, NETWORKING 2008, held in Singapore, in May 2008. The 82 revised full papers were carefully reviewed and selected from numerous submissions for inclusion in the book. The papers are organized in topical sections on ad hoc and sensor networks: design and optimization, MAC protocol, overlay networking, and routing; next generation internet: authentication, modeling and performance evaluation, multicast, network measurement and testbed, optical networks, peer-to-peer and overlay networking, peer-to-peer services, QoS, routing, security, traffic engineering, and transport protocols; wireless networks: MAC performance, mesh networks, and mixed networks.

Wireless Ad Hoc and Sensor Networks

Author : Raja Jurdak
Publisher : Springer Science & Business Media
ISBN 13 : 0387390235
Total Pages : 270 pages
Book Rating : 4.3/5 (873 download)

DOWNLOAD NOW!

Book Synopsis Wireless Ad Hoc and Sensor Networks by : Raja Jurdak

Download or read book Wireless Ad Hoc and Sensor Networks written by Raja Jurdak and published by Springer Science & Business Media. This book was released on 2007-04-27 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the optimization potential of cross-layer design approaches for wireless ad hoc and sensor network performance, covering both theory and practice. A theoretical section provides an overview of design issues in both strictly layered and cross-layer approaches. A practical section builds on these issues to explore three case studies of diverse ad hoc and sensor network applications and communication technologies.

NETWORKING 2007. Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet

Author : Ian F. Akyildiz
Publisher : Springer Science & Business Media
ISBN 13 : 3540726055
Total Pages : 1278 pages
Book Rating : 4.5/5 (47 download)

DOWNLOAD NOW!

Book Synopsis NETWORKING 2007. Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet by : Ian F. Akyildiz

Download or read book NETWORKING 2007. Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet written by Ian F. Akyildiz and published by Springer Science & Business Media. This book was released on 2007-04-27 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 6th International IFIP-TC6 Networking Conference, NETWORKING 2007, held in Atlanta, GA, USA in May 2007. The 99 revised full papers and 30 poster papers were carefully reviewed and selected from 440 submissions. The papers are organized in topical sections on ad hoc and sensor networks: connectivity and coverage, scheduling and resource allocation, mobility and location awareness, routing, and key management; wireless networks: mesh networks, mobility, TCP, MAC performance, as well as scheduling and resource allocation; next generation inte.

Computational Science and Its Applications – ICCSA 2009

Author : Osvaldo Gervasi
Publisher : Springer Science & Business Media
ISBN 13 : 3642024572
Total Pages : 980 pages
Book Rating : 4.6/5 (42 download)

DOWNLOAD NOW!

Book Synopsis Computational Science and Its Applications – ICCSA 2009 by : Osvaldo Gervasi

Download or read book Computational Science and Its Applications – ICCSA 2009 written by Osvaldo Gervasi and published by Springer Science & Business Media. This book was released on 2009-07-09 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume set LNCS 5592 and 5593 constitutes the refereed proceedings of the International Conference on Computational Science and Its Applications, ICCSA 2009, held in Seoul, Korea, in June/July, 2009. The two volumes contain papers presenting a wealth of original research results in the field of computational science, from foundational issues in computer science and mathematics to advanced applications in virtually all sciences making use of computational techniques. The topics of the fully refereed papers are structured according to the five major conference themes: computational methods, algorithms and scientific applications, high performance technical computing and networks, advanced and emerging applications, as well as information systems and information technologies. Moreover, submissions from more than 20 workshops and technical sessions contribute to this publication.These cover topics such as geographical analysis, urban modeling, spatial statistics, wireless and ad hoc networking, logical, scientific and computational aspects of pulse phenomena in transitions, high-performance computing and information visualization, sensor network and its applications, molecular simulations structures and processes, collective evolutionary systems, software engineering processes and applications, molecular simulations structures and processes, internet communication security, security and privacy in pervasive computing environments, and mobile communications.

Handbook of Wireless Local Area Networks

Author : Mohammad Ilyas
Publisher : CRC Press
ISBN 13 : 020349251X
Total Pages : 664 pages
Book Rating : 4.2/5 (34 download)

DOWNLOAD NOW!

Book Synopsis Handbook of Wireless Local Area Networks by : Mohammad Ilyas

Download or read book Handbook of Wireless Local Area Networks written by Mohammad Ilyas and published by CRC Press. This book was released on 2005-05-25 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Wireless Local Area Networks: Applications, Technology, Security, and Standards captures the current state of wireless LANs, and serves as the single comprehensive reference on the subject. Addressing challenges related to the further development of WLAN technology, the Handbook covers the entire spectrum of topics from basic concepts t

Mobile Ad Hoc Networks

Author : Jonathan Loo
Publisher : CRC Press
ISBN 13 : 1466513144
Total Pages : 672 pages
Book Rating : 4.4/5 (665 download)

DOWNLOAD NOW!

Book Synopsis Mobile Ad Hoc Networks by : Jonathan Loo

Download or read book Mobile Ad Hoc Networks written by Jonathan Loo and published by CRC Press. This book was released on 2016-04-19 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, this book examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Leading researchers, industry professionals, and academics provide an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service.