Medium Access Control Protocols and Routing Strategies for Wireless Local and Personal Area Networks PDF Download

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Languages : en
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Recent advances in portable computing and wireless technologies are opening up exciting possibilities for the future of wireless mobile networking. More notably, Wireless Local and Personal Area Networks (WLANs and WPANs) technologies are expected to revolutionize the way we live. Given their unprecedented importance, in this dissertation we investigate and suggest new solutions in the context of WLANs and WPANs systems. In the world of WLANs, we study its major representative, namely, the IEEE standard 802.11, while we explore the Bluetooth technology as it is the most prominent solution in the world of WPANs. In the field of Bluetooth, we have identified key issues and made considerable contributions. We have carried out a detailed analytical and simulation analysis of radio interference impact on Bluetooth and proposed ways of mitigating it, such as a novel interference-aware packet segmentation protocol (IBLUES). Moreover, we also introduce an integrated IEEE 802.11 and Bluetooth architecture (BlueStar), which enables efficient information interchange between these two widely used technologies. BlueStar is analyzed in great detail and, among other things, it features a new coexistence method between IEEE 802.11 and Bluetooth which employs a novel combination of carrier sense and adaptive frequency hopping. Next, to handle the inefficiency of the current Bluetooth master/slave communication paradigm, we propose a novel QoS-driven dynamic slot assignment and piconet partitioning algorithms. In the context of IEEE 802.11, we initially investigate advanced MAC-based routing strategies. These strategies, referred to as COPAS (contention-based path selection), are intentionally devised and observed to boost TCP performance over the multi-hop type of IEEE 802.11 ad hoc networks, giventhat TCP is by far the most important and widely used transport protocol in today2s networks. Finally, we design and evaluate a new power control MAC protocol for spatial reusability over ad hoc networks, which is observed to considerably outperform existing MAC protocols. We conclude with some promising future work in the areas of both Bluetooth and IEEE 802.11.

Author: Hongyi Wu
Publisher: Nova Publishers
ISBN: 9781600219443
Category : Computers
Languages : en
Pages : 662

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Book Description
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.

Author:
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ISBN:
Category :
Languages : en
Pages : 287

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Book Description
The past decade has seen an explosive growth in wireless products such as cellular phones and pagers. The zeal with which consumers are using these products and services is a testament to our society's desire to remain in touch while on the move. Computing systems are now reaping the benefits of this quest for mobility. Since their inception in the late 1970's FrE80, GfB79, wireless local area networks have been thrust to the forefront of networking alternatives especially when confronted with difficult or impossible obstacles sometimes associated with wired networks such as routing cables and spontaneous ad hoc LANs. Before a wireless LAN is considered, system capabilities, cost, and limitations must be given due consideration. To gain user acceptance, a wireless LAN must sustain data rates comparable with wired networks, gracefully control the inherently larger number of bit errors, and allow inter-operability with heterogeneous vendor products. Pivotal to network performance, the medium access control (MAC) is the protocol used by all stations within the network to control when each station is allowed to transmit and ultimately determines the degree to which the aforementioned factors satisfy the user. Current wireless LANs are artificially limiting their performance by using a wired LAN MAC model. This 'worst case' model assumes that once the medium suffers a performance degradation, it cannot be improved.

Author: Barry E. Mullins
Publisher:
ISBN: 9781423579441
Category :
Languages : en
Pages : 287

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Book Description
The past decade has seen an explosive growth in wireless products such as cellular phones and pagers. The zeal with which consumers are using these products and services is a testament to our society's desire to remain in touch while on the move. Computing systems are now reaping the benefits of this quest for mobility. Since their inception in the late 1970's FrE80, GfB79, wireless local area networks have been thrust to the forefront of networking alternatives especially when confronted with difficult or impossible obstacles sometimes associated with wired networks such as routing cables and spontaneous ad hoc LANs. Before a wireless LAN is considered, system capabilities, cost, and limitations must be given due consideration. To gain user acceptance, a wireless LAN must sustain data rates comparable with wired networks, gracefully control the inherently larger number of bit errors, and allow inter-operability with heterogeneous vendor products. Pivotal to network performance, the medium access control (MAC) is the protocol used by all stations within the network to control when each station is allowed to transmit and ultimately determines the degree to which the aforementioned factors satisfy the user. Current wireless LANs are artificially limiting their performance by using a wired LAN MAC model. This 'worst case' model assumes that once the medium suffers a performance degradation, it cannot be improved.

Author: Anna Hac
Publisher: John Wiley & Sons
ISBN: 0470855274
Category : Technology & Engineering
Languages : en
Pages : 260

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Book Description
Mobile users are demanding fast and efficient ubiquitous connectivity supporting data applications. This connectivity has to be provided by various different networks and protocols which guarantee that mobile networks function efficiently, performing routing and handoff for mobile users. Hac proposes a comprehensive design for mobile communications including mobile agents, access networks, application protocols, ubiquitous connectivity, routing, and handoff. It covers the entire spectrum of lower and upper layer protocols to evaluate and design modern mobile telecommunications systems. Furthermore, the aspects of modern mobile telecommunications for applications, networking, and transmission are described. For mobile users and data applications these are new networking and communications solutions, particularly for the local area network environment. * Describes the recent advances in mobile telecommunications, their protocols and management * Covers hot topics such as mobile agents, access networks, wireless applications protocols, wireless LANs, architecture, routing and handoff * Introduces and analyses architecture and design issues in mobile communications and networks * Includes a section of questions/problems/answers after each chapter The book is written as a practical, easily accessible tutorial with many figures and examples of existing protocols and architectures making it essential reading for engineers, system engineers, researchers, managers, senior & graduate students.

Author: Ping Wang
Publisher: Springer Science & Business Media
ISBN: 1461466024
Category : Computers
Languages : en
Pages : 117

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Book Description
This brief investigates distributed medium access control (MAC) with QoS provisioning for both single- and multi-hop wireless networks including wireless local area networks (WLANs), wireless ad hoc networks, and wireless mesh networks. For WLANs, an efficient MAC scheme and a call admission control algorithm are presented to provide guaranteed QoS for voice traffic and, at the same time, increase the voice capacity significantly compared with the current WLAN standard. In addition, a novel token-based scheduling scheme is proposed to provide great flexibility and facility to the network service provider for service class management. Also proposed is a novel busy-tone based distributed MAC scheme for wireless ad hoc networks and a collision-free MAC scheme for wireless mesh networks, respectively, taking the different network characteristics into consideration. The proposed schemes enhance the QoS provisioning capability to real-time traffic and, at the same time, significantly improve the system throughput and fairness performance for data traffic, as compared with the most popular IEEE 802.11 MAC scheme.

Author: David Munoz
Publisher: Academic Press
ISBN: 0080921930
Category : Technology & Engineering
Languages : en
Pages : 297

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Book Description
This book is the definitive guide to the techniques and applications of position location, covering both terrestrial and satellite systems. It gives all the techniques, theoretical models, and algorithms that engineers need to improve their current location schemes and to develop future location algorithms and systems. Comprehensive coverage is given to system design trade-offs, complexity issues, and the design of efficient positioning algorithms to enable the creation of high-performance location positioning systems. Traditional methods are also reexamined in the context of the challenges posed by reconfigurable and multihop networks. Applications discussed include wireless networks (WiFi, ZigBee, UMTS, and DVB networks), cognitive radio, sensor networks and multihop networks. Features - Contains a complete guide to models, techniques, and applications of position location - Includes applications to wireless networks, demonstrating the relevance of location positioning to these "hot" areas in research and development - Covers system design trade-offs and the design of efficient positioning algorithms, enabling the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms David Muñoz is Director and César Vargas is a member of the Center for Electronics and Telecommunications, Tecnológico de Monterrey, Mexico. Frantz Bouchereau is a senior communications software developer at The MathWorks Inc. in Natick, MA. Rogerio Enríquez-Caldera is at Instituto Nacional de Atrofisica, Optica y Electronica (INAOE), Puebla, Mexico. - Contains a complete guide to models, techniques and applications of position location - Includes applications to wireless networks (WiFi, ZigBee, DVB networks), cognitive radio, sensor networks and reconfigurable and multi-hop networks, demonstrating the relevance of location positioning to these 'hot' areas in research and development - Covers system design trade-offs, and the design of efficient positioning algorithms enables the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms

Author: Lin Cai
Publisher:
ISBN:
Category :
Languages : en
Pages : 169

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Book Description
The next-generation wireless networks are expected to integrate diverse network architectures and various wireless access technologies to provide a robust solution for ubiquitous broadband wireless access, such as wireless local area networks (WLANs), Ultra-Wideband (UWB), and millimeter-wave (mmWave) based wireless personal area networks (WPANs), etc. To enhance the spectral efficiency and link reliability, smart antenna systems have been proposed as a promising candidate for future broadband access networks. To effectively exploit the increased capabilities of the emerging wireless networks, the different network characteristics and the underlying physical layer features need to be considered in the medium access control (MAC) design, which plays a critical role in providing efficient and fair resource sharing among multiple users. In this thesis, we comprehensively investigate the MAC design in both single- and multi-hop broadband wireless networks, with and without infrastructure support.

Author: Soufiene Djahel
Publisher: GRIN Verlag
ISBN: 3656041024
Category : Computers
Languages : en
Pages : 170

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Book Description
Doctoral Thesis / Dissertation from the year 2011 in the subject Computer Science - Internet, New Technologies, Lille 1 University (Laboratoire d'Informatique Fondamentale de Lille), course: Security in Wireless Multi-hop Networks, language: English, abstract: While the rapid proliferation of mobile devices along with the tremendous growth of various applications using wireless multi-hop networks have significantly facilitate our human life, securing and ensuring high quality services of these networks are still a primary concern. In particular, anomalous protocol operation in wireless multi-hop networks has recently received considerable attention in the research community. These relevant security issues are fundamentally different from those of wireline networks due to the special characteristics of wireless multi-hop networks, such as the limited energy resources and the lack of centralized control. These issues are extremely hard to cope with due to the absence of trust relationships between the nodes. To enhance security in wireless multi-hop networks, this dissertation addresses both MAC and routing layers misbehaviors issues, with main focuses on thwarting black hole attack in proactive routing protocols like OLSR, and greedy behavior in IEEE 802.11 MAC protocol. Our contributions are briefly summarized as follows. As for black hole attack, we analyze two types of attack scenarios: one is launched at routing layer, and the other is cross layer. We then provide comprehensive analysis on the consequences of this attack and propose effective countermeasures. As for MAC layer misbehavior, we particularly study the adaptive greedy behavior in the context of Wireless Mesh Networks (WMNs) and propose FLSAC (Fuzzy Logic based scheme to Struggle against Adaptive Cheaters) to cope with it. A new characterization of the greedy behavior in Mobile Ad Hoc Networks (MANETs) is also introduced. Finally, we design a new backoff scheme to quickly detect the greedy nodes that do not comply with IEEE 802.11 MAC protocol, together with a reaction scheme that encourages the greedy nodes to become honest rather than punishing them.

Author: Hai Liu
Publisher: Bentham Science Publishers
ISBN: 1608050181
Category : Computers
Languages : en
Pages : 147

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Book Description
"This Ebook brings together the latest developments and studies of Mobile Ad Hoc Networks (MANETs) and Wireless Sensor Networks (WSNs), which should provide a seedbed for new breakthroughs. It focuses on the most representative topics in MANETs and WSNs, s"