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In the past decade, cooperative wireless networks have emerged as a promising technology that allows wireless devices to take advantage of diversity and link adaptation. In this thesis, we focus on the design and analysis of the medium access control (MAC) layer for the cooperative wireless networks, aiming at two main issues in this field: relay selection under mobility and incentive-based allocation for relaying packets. Specifically, we proposed and analysed 1) an intelligent cooperative MAC protocol to select stable helpers to provide better throughput; 2) two coordination schemes for multiple helpers to tradeoff the diversity advantage and transmission delay; 3) a moneyless incentive scheme which can stimulate the agreement of cooperation; and 4) three monetary incentive allocation mechanisms to stimulate cooperative relaying while maintaining the desired properties. Firstly, our proposed cooperative MAC protocol, referred as PTCoopMAC, can make use of the out-of-date information from the overheard signals to select the optimal stable helper to improve the system throughput. Secondly, we analysed the unconditional relaying success probability for a wireless diversity system with multiple random moving helpers. One Aloha-based and one timer-based coordination schemes were designed to balance the success probability and transmission delay. Thirdly, the moneyless incentive scheme for one cooperative pair transmission can tune up and down the channel access probability of the helper and the source as the reward and payment, respectively. We further provided the conditions on how to select the tuning factors to reach the cooperation agreement. Finally, we proposed three monetary incentive allocation mechanisms towards different design goals. The Vickrey-Clarke-Groves (VCG)-based mechanism aims at efficiency in social welfare; the probabilistic entrance auction (PEA) mechanism targets at lowering the computational effort; and the randomized (RND) mechanism attempts to strike a balance between the two mechanisms. All the proposed solutions were extensively evaluated by simulations. The results demonstrated that our solutions successfully addressed the challenges posed by user mobility and incentive for the cooperative wireless networks. The quality of service (QoS) can be significantly improved by properly incorporating cooperation among user devices.
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.
A thoroughly up-to-date resource on IEEE 802 wireless standards Readers can turn to this book for complete coverage of the current and emerging IEEE 802 wireless standards/drafts, including: 802.11 Wireless LANs 802.15.1 Bluetooth and 801.15.2 802.15.3 Wireless PANs 802.15.4 and 802.15.5 Wireless PANs 802.16 Wireless MANs Emerging Wireless LANs, Wireless PANs, and Wireless MANs is a unique, convenient resource for engineers, scientists, and researchers in academia and industry. It also serves as a valuable textbook for related courses at the upper-undergraduate and graduate levels.
This book constitutes the refereed proceedings of the 7th International Conference on Ad-Hoc, Mobile, and Wireless Networks, ADHOC-NOW 2008, held in Sophia-Antipolis, France, September 2008. The 40 revised full papers and the 15 poster presentations were carefully reviewed and selected from 110 submissions. The papers deal with advances in Ad-Hoc networks, i.e. wireless, self-organizing systems formed by co-operating nodes within communication range of each other that form temporary networks. Their topology is dynamic, decentralized, ever changing and the nodes may move around arbitrarily.
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.
Wireless mesh networks (WMN) encompass a new area of technology set to play an important role in the next generation wireless mobile networks. WMN is characterized by dynamic self-organization, self-configuration, and self-healing to enable flexible integration, quick deployment, easy maintenance, low costs, high scalability, and reliable services.
A large set of protocols for wireless networks require cooperation of the nodes. However, cooperation comes with costs of the contributors without benefit at the same time. Selfish peers may choose to avoid contributing while still expect other peers to serve for them, i.e. choose to be free-riders. Given that selfish behavior seriously degrades system performance, in order to drive selfish peers to cooperate, my work focuses at designing a set of incentive compatible protocols for wireless networks. In this dissertation, incentive compatible protocols are designed and analyzed for the following scenarios: (1) in mobile ad hoc networks where network coding is applied, to drive selfish intermediate nodes to perform expensive secure network coding and forward packets with redundancy, a social norm based reputation system with fully distributed reputation management is proposed and analyzed; (2) for LTE content distribution in vehicular ad hoc networks, we propose a cluster-based scheme to save LTE bandwidth, improve content download efficiency, and a key-management scheme to incentivize peers to serve as cluster heads. We also investigate related issues on video congestion control, i.e. a priority based queuing scheme to maintain high video quality under congestion.
This book initially delves into its fundamentals to initiate the exploration of online incentive mechanisms in wireless communications. Three case studies are provided to elaborate details on designing online mechanism design in practical system. For crowdsensing with random task arrivals, this book introduces a linear online incentive mechanism model with insurance of the quality of information for each incoming task. In the context of edge computing systems, the authors model a nonlinear online incentive mechanism with the consideration of mobile users energy budget constraints. It also explores online incentive mechanism for collaborative task offloading in mobile edge computing to achieve on-arrival instant responses. This book not only disseminates current knowledge but also sheds light on future research directions. The design of incentive mechanisms in wireless communication systems is of paramount importance as it encourages dormant terminals within networks to contribute their valuable resources. The consideration of randomness of network processes enhances the mechanism design under online settings and decision making on the fly. This book endeavours to bridge existing knowledge gaps by comprehensively presenting and developing fundamental insights into online incentive mechanisms and their design methods in the realm of wireless communications. Its one of the first books to provide a comprehensive understanding of the fundamental principles of online incentive mechanisms and their intricately designed methods in the dynamic world of wireless communications. Future research directions include an investigation in the evolving domain of online incentive mechanism designs within wireless communications. This book strikes a balance between theoretical knowledge and practical application, making it a valuable resource for both researchers and practitioners in the field of wireless communications and network economics. Advanced-level students majoring in computer science and/or electrical engineering will want to purchase this book as a study guide.
With the rapid growth of new wireless devices and applications over the past decade, the demand for wireless radio spectrum is increasing relentlessly. The development of cognitive radio networking provides a framework for making the best possible use of limited spectrum resources, and it is revolutionising the telecommunications industry. This book presents the fundamentals of designing, implementing, and deploying cognitive radio communication and networking systems. Uniquely, it focuses on game theory and its applications to various aspects of cognitive networking. It covers in detail the core aspects of cognitive radio, including cooperation, situational awareness, learning, and security mechanisms and strategies. In addition, it provides novel, state-of-the-art concepts and recent results. This is an ideal reference for researchers, students and professionals in industry who need to learn the applications of game theory to cognitive networking.