Author: Publisher:
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Languages : en
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Book Description
Physical Layer Issues and Cross-layer Design in Wireless Networks
Author: Adaptation and Cross Layer Design in Wireless Networks
Author: Mohamed IbnkahlaPublisher: CRC Press
ISBN: 135183570X
Category : Technology & Engineering
Languages : en
Pages : 428
Book Description
Adaptive 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.
Resource Allocation and Cross-layer Control in Wireless Networks
Author: Leonidas GeorgiadisPublisher: Now Publishers Inc
ISBN: 1933019263
Category : Technology & Engineering
Languages : en
Pages : 161
Book Description
Information 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 ComaniciuPublisher: Springer Science & Business Media
ISBN: 0387277501
Category : Technology & Engineering
Languages : en
Pages : 214
Book Description
Cross-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.
Wireless Ad Hoc and Sensor Networks
Author: Raja JurdakPublisher: Springer Science & Business Media
ISBN: 0387390235
Category : Technology & Engineering
Languages : en
Pages : 270
Book Description
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.
Using Cross-Layer Techniques for Communication Systems
Author: Rashvand, Habib F.Publisher: IGI Global
ISBN: 1466609613
Category : Computers
Languages : en
Pages : 656
Book Description
Although 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.
Cross-layer Design for Wireless Ad Hoc Sensor Networks
Author: Xinsheng XiaPublisher: ProQuest
ISBN: 9780549319924
Category : Electrical engineering
Languages : en
Pages :
Book Description
Cross-layer design is an efficient approach to enhance energy efficiency and Quality of Service (QoS) in wireless ad hoc sensor networks. This dissertation will focus on the cross-layer issues and approaches. It will also discuss the latency-aware and energy efficiency tradeoffs and the packets transmission in the rear part of the dissertation. Firstly, we will analyze the cross-layer design for wireless sensor networks based on the virtual MIMO techniques. We will coordinate the physical layer, the MAC layer and the network layer for cross-layer evaluation. Performance analysis and simulation results show that throughput and packet loss ratio will have different performances compared with only considering the MIMO scheme in the physical layer as the increase of the number of transmitters. Secondly, we will discuss the bottom-up optimization for cross-layer design. We used the fuzzy logic system (FLS) to coordinate the physical layer, the data-link layer and the application layer for cross-layer design. Simulation results show that the cross-layer design can reduce the average delay, increase the throughput and extend the network lifetime. The network performance parameters could also keep stability after the cross-layer optimization. Thirdly, we extended the FLS application in cross-layer design from Type-1 to Type-2. We demonstrated that type-2 fuzzy membership function (MF), i.e., the Gaussian MFs with uncertain variance is most appropriate to model BER and MAC layer service time. We used the forecasted transmission delay to adjust the transmission power, and it showed that the interval type-2 FLS performed much better than a type-1 FLS, and FLSs performed better than back-prop NN in terms of energy consumption, average delay and throughput. Also, we obtained the performance bound based on the actual transmission delay. Finally, we applied a image as the real service in WSNs. We considered cross-layer design for image transmission in WSNs. We combined the application layer, the MAC layer and the physical layer together. According to analysis and simulation, there were tradeoffs between QoS and energy consumption for both high priority service and low priority service. Application level QoS was applied to evaluate the cross-layer design for WSNs. Two other works were discussed in this dissertation. One is the latency-aware and energy efficiency tradeoffs for wireless sensor networks. Latency and energy efficiency are two important parameters to evaluate the WSNs. The FLS is applied to the nodes selection. In contrast with the cases that only consider one descriptor, the FLS application can manage the delay/energy tradeoffs to meet the network performance requirements. Another work discussed is "Packets Transmission in wireless sensor networks: interference, energy and delay-aware approach". In the WSN, the interference will affect the packets transmission. We proposed FLS in the optimization of SIR threshold selection. Average delay and distance of a node to the source node are selected as antecedents for the FLS. The output of FLS provided adjusting factors for the SIR threshold. Simulation results showed the fuzzy optimization could achieve a better network efficiency, reduce the average delay and extend the network lifetime.
Wireless Networks: Multiuser Detection in Cross-Layer Design
Author: Christina ComaniciuPublisher: Springer
ISBN: 9780387503677
Category : Technology & Engineering
Languages : en
Pages : 0
Book Description
Cross-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.
Cross-layer Design for Wireless Mesh Networks with Advanced Physical and Network Layer Techniques
Author: Mina YazdanpanahCross-Layer Resource Allocation in Wireless Communications
Author: Ana I. Perez-NeiraPublisher: Academic Press
ISBN: 0080920888
Category : Technology & Engineering
Languages : en
Pages : 188
Book Description
Cross-Layer Resource Allocation in Wireless Communications offers practical techniques and models for the design and optimisation of cross-layer resource allocation – one of the hottest topics in wireless communications. Resource allocation in wireless networks is traditionally approached either through information theory or communications networks. To break down the barriers between these distinct approaches, this book bridges the physical and network layers by providing cross-layer resource allocation techniques, models, and methodologies. Its unique approach allows optimisation of network resources and will enable engineers to improve signal quality, enhance network and spectrum utilization, increase throughput, and solve the problem of shadowing. Topics covered include different views of spectral efficiency, the role of spatial diversity, of delay in resource allocation, and possible extensions to OFDMA systems. This will be an ideal reference on cross-layer resource allocation between the PHY and MAC layers for R&D and network design engineers and researchers in universities dealing with sensor networks and cognitive systems. - Gives a full description of the characteristics of the PHY layer that promote efficient resource allocation strategies - Gives special emphasis on cross-layer design for spatial diversity schemes - Provides a framework for interaction between the PHY and MAC layers, their parameters of performance and their relationship - Presents resource allocation as a cross-layer design based on an optimization of MAC layer parameters with an accurate model of the PHY layer