Distributed Medium Access Control in Wireless Networks - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Distributed Medium Access Control in Wireless Networks write by Ping Wang. This book was released on 2013-03-23. Distributed Medium Access Control in Wireless Networks available in PDF, EPUB and Kindle. 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.
Distributed Medium Access Control for QoS Support in Wireless Networks
Distributed Medium Access Control for QoS Support in Wireless Networks - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Distributed Medium Access Control for QoS Support in Wireless Networks write by Ping Wang. This book was released on 2008. Distributed Medium Access Control for QoS Support in Wireless Networks available in PDF, EPUB and Kindle. With the rapid growth of multimedia applications and the advances of wireless communication technologies, quality-of-service (QoS) provisioning for multimedia services in heterogeneous wireless networks has been an important issue and drawn much attention from both academia and industry. Due to the hostile transmission environment and limited radio resources, QoS provisioning in wireless networks is much more complex and difficult than in its wired counterpart. Moreover, due to the lack of central controller in the networks, distributed network control is required, adding complexity to QoS provisioning. In this thesis, medium access control (MAC) with QoS provisioning is investigated for both single- and multi-hop wireless networks including wireless local area networks (WLANs), wireless ad hoc networks, and wireless mesh networks. Originally designed for high-rate data traffic, a WLAN has limited capability to support delay-sensitive voice traffic, and the service for voice traffic may be impacted by data traffic load, resulting in delay violation or large delay variance. Aiming at addressing these limitations, we propose an efficient MAC scheme and a call admission control algorithm 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 to supporting voice traffic, providing better services for data traffic in WLANs is another focus of our research.
Medium Access Control in Wireless Networks
Medium Access Control in Wireless Networks - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Medium Access Control in Wireless Networks write by Hongyi Wu. This book was released on 2008. Medium Access Control in Wireless Networks available in PDF, EPUB and Kindle. 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.
Wireless Quality of Service
Wireless Quality of Service - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Wireless Quality of Service write by Maode Ma. This book was released on 2008-09-09. Wireless Quality of Service available in PDF, EPUB and Kindle. Focusing on an important and complicated topic in wireless network design, Wireless Quality of Service: Techniques, Standards, and Applications systematically addresses the quality-of-service (QoS) issues found in many types of popular wireless networks. In each chapter, the book presents numerous QoS challenges encountered in real-world
QoS Provisioning Via Cooperative Medium Access Protocol in Wireless Networks
QoS Provisioning Via Cooperative Medium Access Protocol in Wireless Networks - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook QoS Provisioning Via Cooperative Medium Access Protocol in Wireless Networks write by Fatma Orsun. This book was released on 2005. QoS Provisioning Via Cooperative Medium Access Protocol in Wireless Networks available in PDF, EPUB and Kindle. [Author's abstract] Short term fairness, low delay jitter and high throughput are required to provide differentiated Quality of Service (QoS) levels in wireless ad hoc networks and wireless Local Area Networks (LAN). This thesis presents a study of differentiated service mechanism via Cooperative Medium Access Protocol in wireless LANs. The IEEE 802.11 MAC can provide service differentiation via Point Coordination Function (PCF) by polling or Distributed Coordination Function (DCF) by Static Priority (SP) and Dynamic Priority (DP). The DP and PCF in highly loaded networks and SP in lightly loaded networks perform poorly and can not support QoS levels of wireless LANs efficiently. This thesis proposes a novel and efficient differentiated service mechanism via Cooperative Medium Access Control (C MAC). Proposed mechanism performs very well under both cases, highly loaded and lightly loaded. It protects high priority classes from greedy sources while providing short term fairness within the priority classes and high network goodput. However, it encounters a small amount of additional packet loss and goodput degradation and it requires additional counter, Backoff Increment Counter, and additional knowledge, priority level of the transmitted packet.
