Cross-layer Medium Access and Congestion Control for Wireless Networks
Author: Yingqun Yu
Publisher:
Published: 2007
Total Pages: 256
ISBN-13:
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Resource Allocation and Cross-layer Control in Wireless Networks
Author: Leonidas Georgiadis
Publisher: Now Publishers Inc
Published: 2006
Total Pages: 161
ISBN-13: 1933019263
DOWNLOAD EBOOKInformation flow in a telecommunication network is accomplished through the interaction of mechanisms at various design layers with the end goal of supporting the information exchange needs of the applications. In wireless networks in particular, the different layers interact in a nontrivial manner in order to support information transfer. In this text we will present abstract models that capture the cross-layer interaction from the physical to transport layer in wireless network architectures including cellular, ad-hoc and sensor networks as well as hybrid wireless-wireline. The model allows for arbitrary network topologies as well as traffic forwarding modes, including datagrams and virtual circuits. Furthermore the time varying nature of a wireless network, due either to fading channels or to changing connectivity due to mobility, is adequately captured in our model to allow for state dependent network control policies. Quantitative performance measures that capture the quality of service requirements in these systems depending on the supported applications are discussed, including throughput maximization, energy consumption minimization, rate utility function maximization as well as general performance functionals. Cross-layer control algorithms with optimal or suboptimal performance with respect to the above measures are presented and analyzed. A detailed exposition of the related analysis and design techniques is provided.
Wireless Networks: Multiuser Detection in Cross-Layer Design
Author: Christina Comaniciu
Publisher: Springer Science & Business Media
Published: 2006-06-14
Total Pages: 214
ISBN-13: 0387277501
DOWNLOAD EBOOKCross-layer design seeks to enhance the capacity of wireless networks significantly through the joint optimization of multiple layers in the network, primarily the physical (PHY) and medium access control (MAC) layers. Although there are advantages of such design in wireline networks as well, this approach is particularly advantageous for wireless networks due to the properties (such as mobility and interference) that strongly affect performance and design of higher layer protocols. This unique monograph is concerned with the issue of cross-layer design in wireless networks, and more particularly with the impact of node-level multiuser detection on such design. It provides an introduction to this vibrant and active research area insufficiently covered in existing literature, presenting some of the principal methods developed and results obtained to date. Accompanied by numerous illustrations, the text is an excellent reference for engineers, researchers and students working in communication networks.
Applying Cross Layer Techniques to the Design of Medium Access Control (MAC) Protocols for Emerging Wireless Networks
Author: Harkirat Singh (Ph.D.)
Publisher:
Published: 2005
Total Pages: 378
ISBN-13:
DOWNLOAD EBOOKUsing Cross-Layer Techniques for Communication Systems
Author: Rashvand, Habib F.
Publisher: IGI Global
Published: 2012-04-30
Total Pages: 656
ISBN-13: 1466609613
DOWNLOAD EBOOKAlthough the existing layering infrastructure--used globally for designing computers, data networks, and intelligent distributed systems and which connects various local and global communication services--is conceptually correct and pedagogically elegant, it is now well over 30 years old has started create a serious bottleneck. Using Cross-Layer Techniques for Communication Systems: Techniques and Applications explores how cross-layer methods provide ways to escape from the current communications model and overcome the challenges imposed by restrictive boundaries between layers. Written exclusively by well-established researchers, experts, and professional engineers, the book will present basic concepts, address different approaches for solving the cross-layer problem, investigate recent developments in cross-layer problems and solutions, and present the latest applications of the cross-layer in a variety of systems and networks.
Adaptation and Cross Layer Design in Wireless Networks
Author: Mohamed Ibnkahla
Publisher: CRC Press
Published: 2018-10-08
Total Pages: 526
ISBN-13: 1420046101
DOWNLOAD EBOOKAdaptive techniques play a key role in modern wireless communication systems. The concept of adaptation is emphasized in the Adaptation in Wireless Communications Series through a unified framework across all layers of the wireless protocol stack ranging from the physical layer to the application layer, and from cellular systems to next-generation wireless networks. Adaptation and Cross Layer Design in Wireless Networks is devoted to adaptation in the data link layer, network layer, and application layer. The book presents state-of-the-art adaptation techniques and methodologies, including cross-layer adaptation, joint signal processing, coding and networking, selfishness in mobile ad hoc networks, cooperative and opportunistic protocols, adaptation techniques for multimedia support, self –organizing routing, and tunable security services. It presents several new theoretical paradigms and analytical findings which are supported with various simulation and experimental results. Adaptation in wireless communications is needed in order to achieve high capacity and ubiquitous communications. The current trend in wireless communication systems is to make adaptation dependent upon the state of the relevant parameters in all layers of the system. Focusing on simplified cross layer design approaches, this volume describes advanced techniques such as adaptive resource management, adaptive modulation and coding, 4G communications, QoS, diversity combining, and energy and mobility aware MAC protocols. The first volume in the series, Adaptive Signal Processing in Wireless Communications (cat no.46012) covers adaptive signal processing at the physical layer.
Study of Congestion Control in Wireless Networks
Author: Xiaolong Li
Publisher:
Published: 2009
Total Pages: 137
ISBN-13: 9781109263442
DOWNLOAD EBOOKThe prevalence of high bandwidth-delay product networks creates significant challenges for TCP and AQM schemes. To that end, various mechanisms have been proposed to either adaptively adjust sending window size by amending the parameters of Additive-Increase Multiplicative-Decrease, use different congestion signals, or even explicitly signal the congestion information to the sender. Often times, such mechanisms fail to simultaneously achieve high utilization and fairness while maintaining low persistent queue length and minimizing congestion-induced packet drop rate. In contrast, a pair of recently proposed protocols, XCP and VCP, can achieve near zero congestion loss in wired networks by decoupling fairness control from efficiency. In addition, the operation of any congestion control protocol over wireless networks is subject to a significant performance degradation without differentiating between congestion-caused loss associated with network buffering and error-caused loss associated with fading effects. This dissertation provides a cross-layer framework of analysis, simulation, implementation, emulation, and performance profiling of congestion control protocols over wireless networks. Relying on simulation, emulation, and implementation, we demonstrate that VCP represents a high performing yet practical congestion control protocol for wireless networks. Further, some of the shortcomings of VCP are identified including its oscillatory behavior in the presence of link estimation errors, relatively low speed of convergence and poor fairness characteristic in moderate bandwidth high delay networks due to utilizing an insufficient amount of congestion feedback. Next, a distributed congestion control scheme is proposed that distributes and extracts congestion related information into and/or from a chain of packets. Utilizing such a scheme, we design and implement a distributed ECN-based congestion control protocol to which we refer as Multi Packet Congestion Control Protocol (MPCP). In contrast to VCP, MPCP is able to relay a more precise congestion feedback while preserving the use of no more than the two ECN bits in each packet. Additionally, a heuristic scheme for identifying the cause of loss in wireless network is proposed. This scheme can be applied to any feedback-based congestion control algorithm and can achieve a significant performance improvement over lossy wireless networks.
Wireless Networks: Multiuser Detection in Cross-Layer Design
Author: Christina Comaniciu
Publisher: Springer
Published: 2008-11-01
Total Pages: 0
ISBN-13: 9780387503677
DOWNLOAD EBOOKCross-layer design seeks to enhance the capacity of wireless networks significantly through the joint optimization of multiple layers in the network, primarily the physical (PHY) and medium access control (MAC) layers. Although there are advantages of such design in wireline networks as well, this approach is particularly advantageous for wireless networks due to the properties (such as mobility and interference) that strongly affect performance and design of higher layer protocols. This unique monograph is concerned with the issue of cross-layer design in wireless networks, and more particularly with the impact of node-level multiuser detection on such design. It provides an introduction to this vibrant and active research area insufficiently covered in existing literature, presenting some of the principal methods developed and results obtained to date. Accompanied by numerous illustrations, the text is an excellent reference for engineers, researchers and students working in communication networks.
Crosslayer Design for Medium Access Control in Wireless Ad Hoc Networks
Author: Feng Chen
Publisher:
Published: 2009
Total Pages:
ISBN-13:
DOWNLOAD EBOOKABSTRACT: This dissertation focuses on cross layer design for network protocols in wireless ad hoc networks. It studies the relationship between link scheduling at medium access control layer and physical or network layer. Link scheduling is a way of achieving the optimal MAC layer throughput while avoiding collisions. In this dissertation, it is modeled using graph theory concepts based on different interference model. MAC layer is served as an anchoring layer in our cross layer design which can collect physical layer information and provide information to network layer. Cross layer design between MAC layer and physical layer or routing layer can provide better overall system performance. The dissertation will discuss how the carrier sensing threshold, a physical layer parameter, impact the link scheduling strategy in order to achieve the optimal aggregate throughput at MAC layer. The dissertation will also investigate the joint routing and link scheduling problem using a graph theory based model. Further more, since solving the above joint design problems is usually NP-hard, we propose polynomial solutions for estimating the bounds for network capacity. In an effort to design MAC layer solution for real systems, we propose an opportunistic MAC for multichannel multiradio wireless networks which utilizes multiradio diversity at physical layer as well.
Effect of Slow Fading and Adaptive Modulation on TCP/UDP Performance of High-speed Packet Wireless Networks
Author: Xuanming Dong
Publisher:
Published: 2006
Total Pages: 290
ISBN-13:
DOWNLOAD EBOOKHigh speed data wireless networks in multipath environments suffer channel impairment from many sources such as thermal noise, path loss, shadowing, and fading. In particular, short-term fading caused by mobility imposes irreducible error floor bounds on system performance. We study the effect of fading on the performance of the widely used TCP/UDP protocol, and investigate how to improve TCP performance over fading channels. Our solutions target upcoming mobile wireless systems such as IEEE 802.16e wireless MANs "Metropolitan Area Networks" where adaptive modulation is enabled and the underlying medium access scheme is On-Demand Time Division Multiple Access "On-Demand TDMA". Adaptive modulation is used in the new generation of wireless systems to increase the system throughput and significantly improve spectral effciency by matching parameters of the physical layer to the time-varying fading channels. Most high-rate applications for such wireless systems rely on the reliable service provided by TCP protocol. The effect of adaptive modulation on TCP throughput is investigated. A semi-Markov chain model for TCP congestion/flow control behavior and a multi-state Markov chain model for Rayleigh fading channels are used together to derive the steady state throughput of TCP Tahoe and Reno. The theoretical prediction based on our analysis is consistent with simulation results using the network simulator NS2. The analytical and simulation results triggered the idea of cross-layer TCP protocol design for single-user scenarios. The fading parameters of wireless channels detected in the physical layer can be used to dynamically tune the parameters "such as packet length and advertised receiver window size" of the TCP protocol in the transport layer so that TCP throughput is improved. For multi-user scenarios, we study how multi-user diversity can be used to improve th.
