Download or read book A Cross Layer Optimization for Power Management in Wireless Ad Hoc Networks written by Darshana M. Garach and published by . This book was released on 2011 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless ad hoc networks have been an important area of research since past decade. They are self-organized, rapidly deployable and require no fixed infrastructure. They are quickly becoming an important part of our modern communication systems with a wide range of applications like personal communications, gaming, military, disaster relief operations, environment monitoring and more. Transmission of data like voice and video has become increasingly popular for such networks. These applications require strict end-to-end delay constraints on data delivery, requiring speedy transmissions by wireless nodes. Various transmission schemes have been proposed to deal with the delay parameter by implementing smart routing techniques, using more power to guarantee delivery, etc. But for battery powered wireless nodes, minimizing energy consumption is of supreme importance. In absence of strategic transmission schemes the energy consumption of such nodes transmitting delay critical data is very high. Minimizing energy consumption without affecting communication activities is crucial to prolong the lifetime and improve robustness of the network. The power-delay trade-off is hence an important factor in designing the transmission schemes for such networks. Most of the techniques proposed to deal with this trade-off follow the layered approach of the OSI model, which was primarily created with a wired architecture in mind. Characteristics such as absence of a central authority, links subject to multiple access, fading, interference and limited power availability exacerbate the variance of network conditions and bring greater challenges for multimedia delivery. This situation causes interdependencies across the network layers, unlike their wire-line counterparts. Recent studies indicate that power management for ad-hoc networks can be significantly improved using a cross-layer design in which different layers of the OSI stack are jointly optimized for performance. Our approach discusses a cross layer collaboration achieved by a synergy between Application, MAC and PHY layers to serve delay critical applications energy efficiently. We propose a data transmission scheme based upon the channel condition, the power constraint of an individual node and the delay constraint of the data that is being transmitted. We formulate an optimization problem and solve it using dynamic programming techniques for calculating the optimal transmission policy. We provide Matlab simulation results along with simulations performed on the Ns2 network simulator to study the energy-delay tradeoffs in a delay constrained ad hoc network environment. Additionally, we compare the benefits of our transmission policy to a scheme without the benefits of cross-layer network parameter information.

Download or read book Power Management in Wireless Ad Hoc Networks with Directional Antennas written by Ankur Gupta and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has witnessed a remarkable interest in wireless ad hoc networks that operate without any infrastructure support. The potential for deployment of such networks exists in many scenarios ranging from civil and construction engineering, disaster relief to sensor networks and military applications. The IEEE 802.11 Distributed Coordination Function (DCF) is the dominant MAC (layer) protocol for wireless ad hoc networks. Though the DCF scheme has survived the test of time, it still has its characteristic flaws namely the hidden and exposed terminal problems. Various protocols have been suggested to address these problems thereby leading to an overall increase in network throughput. Some of the popular protocols involve adjusting the carrier sensing threshold, replacing the omni directional antennas with directional antennas and intelligent calibration of transmission power. Studies have shown that directional antennas offer numerous advantages over omni directional antennas and thus has the potential to enhance the performance of ad hoc networks. For one, directional antennas have the ability to streamline their power in the direction of the receiver thereby offering longer transmission and reception ranges for the same amount of power. MAC layer protocols specifically designed to support such directional transmission and reception has been a current active area of research. Most of these protocols consider directional transmission under the assumption that the communication range of omni and directional antennas are the same. Apparently this assumption is not supported in any realistic situation. Moreover, the scientific community has not researched in depth the effect of topology on power consumption in ad hoc networks. In this thesis, we propose a cross-layer power optimization scheme for wireless ad hoc networks. The novelty of our work lies in the fact that we exploit the knowledge of the network topology to dynamically calibrate transmission power. The information about the network topology is retrieved from the Network Layer. Specifically, we consider three different network topologies -- (i) a sparse topology, (ii) a dense topology and a (iii) clusterbased topology. The MAC layer implements a dynamic power control scheme which regulates the transmission power of a transmitting node based on the node density at the receiver's end. In addition a transmitting node can adjust its own transmission power to the optimal level if the SINR value at the receiving node is known. Our cross-layer power control algorithm takes the above fact into account. Extensive simulation in NS2 shows that in all the three topologies our cross layer power control scheme (use of directional antennas with power control) leads to prolonged network lifetime and significantly increases the system throughput.

Download or read book Wireless Networks Multiuser Detection in Cross Layer Design written by Christina Comaniciu and published by Springer Science & Business Media. This book was released on 2006-06-14 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Resource Allocation and Cross layer Control in Wireless Networks written by Leonidas Georgiadis and published by Now Publishers Inc. This book was released on 2006 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Energy Management in Wireless Cellular and Ad hoc Networks written by Muhammad Zeeshan Shakir and published by Springer. This book was released on 2016-01-14 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates energy management approaches for energy efficient or energy-centric system design and architecture and presents end-to-end energy management in the recent heterogeneous-type wireless network medium. It also considers energy management in wireless sensor and mesh networks by exploiting energy efficient transmission techniques and protocols. and explores energy management in emerging applications, services and engineering to be facilitated with 5G networks such as WBANs, VANETS and Cognitive networks. A special focus of the book is on the examination of the energy management practices in emerging wireless cellular and ad hoc networks. Considering the broad scope of energy management in wireless cellular and ad hoc networks, this book is organized into six sections covering range of Energy efficient systems and architectures; Energy efficient transmission and techniques; Energy efficient applications and services.

Download or read book Performance Enhancement Using Cross Layer Approaches in Wireless Ad Hoc Networks written by Murad Khallid and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ad hoc network is intrinsically autonomous and self-configuring network that does not require any dedicated centralized management. For specialized applications such as, military operations, search-and-rescue missions, security and surveillance, patient monitoring, hazardous material monitoring, 4G (4th Generation) coverage extension, and rural communication; ad hoc networks provide an intelligent, robust, flexible and cost effective solution for the wireless communication needs. As in centralized wireless systems, ad hoc networks are also expected to support high data rates, low delays, and large node density in addition to many other QoS (Quality of Service) requirements. However, due to unique ad hoc network characteristics, spectrum scarcity, computational limit of current state-of-the-art technology, power consumption, and memory; meeting QoS requirements is very challenging in ad hoc networks. Studies have shown cross layer to be very effective in enhancing QoS performance under spectrum scarcity and other constraints. In this dissertation, our main goal is to enhance performance (e.g., throughput, delay, scalability, fairness) by developing novel cross layer techniques in single-hop single channel general ad hoc networks. Our dissertation mainly consists of three main sections. In the first section, we identify major challenges intrinsic to ad hoc networks that affect QoS performance under spectrum constraint (i.e., single channel). In the later parts of the dissertation, we investigate and propose novel distributed techniques for ad hoc networks to tackle identified challenges. Different from our main goal, albeit closely related; in the first section we propose a conceptual cross layer frame work for interaction control and coordination. In this context, we identify various functional blocks, and show through simulations that global and local perturbations through parametric correlation can be used for performance optimization.

Download or read book Cross Layer Optimization and Adaptation in Wireless Mobile Ad Hoc Networks written by and published by . This book was released on 2004 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overview: *Objective *Wireless Ad Hoc Networks Characteristics *Cross-Layer Design Factors and Feedback Stack *Cross-layer optimization and adaptation improves performance in the user plane -Fast-handoff for mobile using triggers (MOSAIC/CERDEC, LTS, AJCN/DARPA/CERDEC) -Adaptive application based on signaling (AJCN/DARPA/CERDEC) *Cross-layer optimization improves performance in the network management plane -Cross layer Issues in domain auto-configuration (ARL CTA C & N) *Conclusions.

Download or read book Wireless Ad Hoc and Sensor Networks written by Raja Jurdak and published by Springer Science & Business Media. This book was released on 2007-04-27 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Adaptation and Cross Layer Design in Wireless Networks written by Mohamed Ibnkahla and published by CRC Press. This book was released on 2018-10-08 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Using Cross Layer Techniques for Communication Systems written by Rashvand, Habib F. and published by IGI Global. This book was released on 2012-04-30 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Wireless Technologies Concepts Methodologies Tools and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2011-08-31 with total page 2875 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains the latest research, case studies, theories, and methodologies within the field of wireless technologies.

Download or read book Emerging Technologies in Wireless Ad hoc Networks Applications and Future Development written by Aquino-Santos, Raul and published by IGI Global. This book was released on 2010-11-30 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile ad-hoc networks have attracted considerable attention and interest from the commercial sector as well as the standards community. Many new ad-hoc networking applications have been conceived to help enable new commercial and personal communication beyond the domain of tactical networks, including personal area networking, home networking, law enforcement operations, search and rescue operations, commercial and educational applications, and sensor networks. Emerging Technologies in Wireless Ad-hoc Networks: Applications and Future Development provides the rationale, state-of-the-art studies and practical applications, proof-of-concepts, experimental studies, and future development on the use of emerging technologies in wireless ad-hoc networks. In addition, this work explores emerging wireless ad hoc technologies based on communication coverage areas: body sensor networks, personal area networks, local area networks, and metropolitan area networks and their applications in critical sectors, for example, agriculture, environment, public health and public transportation.

Download or read book Wireless Systems and Network Architectures in Next Generation Internet written by Matteo Cesana and published by Springer. This book was released on 2006-05-18 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed post-proceedings of the second international joint workshops on Wireless and Mobility and on New Trends in Network Architectures and Services organized by the European Network of Excellence on Next Generation Internet, EURO-NGI 2005. The 19 revised full research papers presented together with 1 invited talk are organized in topical sections on wireless solutions, QoS support in next generation networks, and peer to peer architectures and algorithms.

Download or read book Wireless Algorithms Systems and Applications written by Yu Cheng and published by Springer Science & Business Media. This book was released on 2011-08-23 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 6th Annual International Conference on Wireless Algorithms, Systems, and Applications, WASA 2011, held in Chengdu, China, in August 2011. The 26 revised full papers and 13 invited papers presented were carefully reviewed and selected from numerous submissions. The papers address all current trends, challenges, and state of the art solutions related to various issues in wireless networks. Topics of interests include, but not limited to, effective and efficient state-of-the-art algorithm design and analysis, reliable and secure system development and implementations, experimental study and test bed validation, and new application exploration in wireless networks.

Download or read book Principles of Wireless Sensor Networks written by Mohammad S. Obaidat and published by Cambridge University Press. This book was released on 2014-12-04 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless sensor networks are an emerging technology with a wide range of applications in military and civilian domains. The book begins by detailing the basic principles and concepts of wireless sensor networks, including information gathering, energy management and the structure of sensory nodes. It proceeds to examine advanced topics, covering localisation, topology, security and evaluation of wireless sensor networks, highlighting international research being carried out in this area. Finally, it features numerous examples of applications of this technology to a range of domains, such as wireless, multimedia, underwater and underground wireless sensor networks. The concise but clear presentation of the important principles, techniques and applications of wireless sensor networks makes this guide an excellent introduction for anyone new to the subject, as well as an ideal reference for practitioners and researchers.

Download or read book Cross layer Optimization Protocols in Ad hoc Wireless Networks written by Marco Belleschi and published by . This book was released on 2007 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Algorithms and Protocols for Wireless and Mobile Ad Hoc Networks written by Azzedine Boukerche and published by John Wiley & Sons. This book was released on 2008-11-03 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the fundamental algorithms and protocols for wireless and mobile ad hoc networks Advances in wireless networking and mobile communication technologies, coupled with the proliferation of portable computers, have led to development efforts for wireless and mobile ad hoc networks. This book focuses on several aspects of wireless ad hoc networks, particularly algorithmic methods and distributed computing with mobility and computation capabilities. It covers everything readers need to build a foundation for the design of future mobile ad hoc networks: Establishing an efficient communication infrastructure Robustness control for network-wide broadcast The taxonomy of routing algorithms Adaptive backbone multicast routing The effect of inference on routing Routing protocols in intermittently connected mobile ad hoc networks and delay tolerant networks Transport layer protocols ACK-thinning techniques for TCP in MANETs Power control protocols Power saving in solar powered WLAN mesh networks Reputation and trust-based systems Vehicular ad hoc networks Cluster interconnection in 802.15.4 beacon enabled networks The book is complemented with a set of exercises that challenge readers to test their understanding of the material. Algorithms and Protocols for Wireless and Mobile Ad Hoc Networks is appropriate as a self-study guide for electrical engineers, computer engineers, network engineers, and computer science specialists. It also serves as a valuable supplemental textbook in computer science, electrical engineering, and network engineering courses at the advanced undergraduate and graduate levels.